Merge pull request #11 from ToruNiina/toml-v050

WIP: major update: support TOML v0.5.0

README.md

@@ -4,200 +4,210 @@ toml11
 [![Build Status](https://travis-ci.org/ToruNiina/toml11.svg?branch=master)](https://travis-ci.org/ToruNiina/toml11)
 [![Build status](https://ci.appveyor.com/api/projects/status/m2n08a926asvg5mg?svg=true)](https://ci.appveyor.com/project/ToruNiina/toml11)
 [![MIT License](http://img.shields.io/badge/license-MIT-blue.svg?style=flat)](LICENSE)
+[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.1209136.svg)](https://doi.org/10.5281/zenodo.1209136)
 
-c++11 header-only toml parser depending only on c++11 standard library.
+c++11 header-only toml parser depending only on c++ standard library.
 
-compatible to TOML v0.4.0.
+compatible to the latest version of TOML v0.5.0 after version 2.0.0.
+
+Are you looking for pre-C++11 compatible toml parser? Try [Boost.toml](https://github.com/ToruNiina/Boost.toml)! It has almost the same functionality as this library and works with C++98 & Boost.
 
 ## How to use
 
-Just include the file after adding correct include path.
+## Installation
+
+Just include the file after adding it to the include path.
 
 ```cpp
-#include <toml11/toml.hpp>
+#include <toml11/toml.hpp> // that's all! now you can use it.
 
 int main()
 {
-    /* do something ... */
+    const auto data  = toml::parse("example.toml");
+    const auto title = toml::get<std::string>(data.at("title"));
+    std::cout << "the title is " << title << std::endl;
 }
 ```
 
-### decoding toml file
+### Decoding toml file
 
-The only thing you have to do is passing filename to `toml::parse` function.
+The only thing you have to do is to pass a filename to the `toml::parse` function.
 
 ```cpp
 const std::string fname("sample.toml");
-const auto data = toml::parse(fname);
+const toml::table data = toml::parse(fname);
 ```
 
 In the case of file open error, it will throw `std::runtime_error`.
 
-You can pass also `stream` to `toml::parse` function.
+You can also pass a `stream` to the  `toml::parse` function after checking the status.
 
 ```cpp
 std::ifstream ifs("sample.toml");
 assert(ifs.good());
-const auto data = toml::parse(ifs);
+const auto data = toml::parse(ifs /*, "filename" (optional)*/);
 ```
 
-If there are syntax error in the toml file,
-`toml::parse` will throw `toml::syntax_error`.
+To show a better error message, it is recommended to pass a filename with `istream`. See also [in the case of syntax error](#in-the-case-of-syntax-error) and [passing invalid type to toml::get](#passing-invalid-type-to-tomlget).
 
-#### toml::get()
+### In the case of syntax error
 
-Then you can obtain the various value from the `data` using `toml::get` function.
+If there is a syntax error in a toml file, `toml::parse` will throw `toml::syntax_error`.
+
+toml11 now has clean and informative error messages inspired by Rust and it looks like the following (comment after hash sign are actually not shown).
+
+```console
+terminate called after throwing an instance of 'toml::syntax_error'
+  what():  [error] toml::parse_table: invalid line format # error description
+ --> example.toml                                         # file name
+ 3 | a = 42 = true                                        # line num and content
+   |        ^------ expected newline, but got '='.        # error reason
+```
+
+Since the error message generation is generally a difficult task, the current status is not ideal. toml11 needs your help. If you encounter a weird error message, please let us know and contribute to improve the quality!
+
+### Getting a toml value
+
+After parsing successfully, you can obtain the values from the result of `toml::parse` (here, `data`) using `toml::get` function.
 
 ```toml
-answer = 42
-pi = 3.14
+answer  = 42
+pi      = 3.14
 numbers = [1,2,3]
-time = 1979-05-27T07:32:00Z
+time    = 1979-05-27T07:32:00Z
 [tab]
 key = "value"
 ```
 
 ``` cpp
-const auto answer    = toml::get<std::int64_t>(data.at("answer"));
-const auto pi        = toml::get<double>(data.at("pi"));
+const auto answer    = toml::get<std::int64_t    >(data.at("answer"));
+const auto pi        = toml::get<double          >(data.at("pi"));
 const auto numbers   = toml::get<std::vector<int>>(data.at("numbers"));
 const auto timepoint = toml::get<std::chrono::system_clock::time_point>(data.at("time"));
 const auto tab       = toml::get<toml::Table>(data.at("tab"));
-const auto key       = toml::get<std::string>(tab.at("key"));
+const auto key       = toml::get<std::string>( tab.at("key"));
 ```
 
-You can set any kind of `container` class to obtain `toml::Array` except for
-`map`-like class.
+When you pass an exact TOML type that does not require type conversion, `toml::get` returns also a reference through which you can modify the content.
+
+```cpp
+toml::get<toml::integer>(data["answer"]) = 6 * 9;
+std::cout << toml::get<int>(data.at("answer")) << std::endl; // 54
+```
+
+If the specified type requires conversion, you can't take a reference to the value. See also [underlying types](#underlying-types).
+
+#### Passing invalid type to toml::get
+
+If you choose the invalid type, `toml::type_error` will be thrown. Similar to the `syntax_error`, toml11 also displays informative error messages. The error message when you choose `int` to get `string` value would be like this.
+
+```console
+terminate called after throwing an instance of 'toml::type_error'
+  what():  [error] toml::value bad_cast to integer
+ --> example.toml
+ 3 | title = "TOML Example"
+   |         ~~~~~~~~~~~~~~ the actual type is string
+```
+
+NOTE: In order to show this kind of error message, all the toml values have 1 shared_ptr that points the corresponding byte sequence and 2 iterators that point the range. It is recommended to destruct all the `toml::value` classes after configuring your application to save memory resources.
+
+### Getting arrays
+
+You can set any kind of `container` class to obtain a `toml::array` except for `map`-like classes.
 
 ``` cpp
-const auto vc  = toml::get<std::vector<int>>(data.at("numbers"));
-const auto ls  = toml::get<std::list<int>>(data.at("numbers"));
-const auto dq  = toml::get<std::deque<int>>(data.at("numbers"));
+const auto vc  = toml::get<std::vector<int>  >(data.at("numbers"));
+const auto ls  = toml::get<std::list<int>    >(data.at("numbers"));
+const auto dq  = toml::get<std::deque<int>   >(data.at("numbers"));
 const auto ar  = toml::get<std::array<int, 3>>(data.at("numbers"));
-// if size of data.at("numbers") is larger than 3, it will throw toml::type_error
-// because std::array is not resizable.
+// if the size of data.at("numbers") is larger than that of std::array,
+// it will throw toml::type_error because std::array is not resizable.
 ```
 
-If the type you passed as a template parameter is incorrect,
-it will throw `toml::type_error`.
-
-``` cpp
-const auto wrong1 = toml::get<bool>(data.at("integer")); // exception thrown!
-const auto wrong2 = toml::get<float>(data.at("integer"));        // ditto
-const auto wrong3 = toml::get<toml::Datetime>(data.at("array")); // ditto
-```
-
-Although `toml::get` is convenient, it has additional copy-cost because it
-copies data contained in `toml::value` to user-specified type.
-Of course in some case this overhead is not ignorable.
-
-You can get reference pointing to contained value using `toml::value::cast()` like this.
-
-``` cpp
-const auto& pi      = data.at("pi").cast<toml::value_t::Float>();
-const auto& tab     = data.at("tab").cast<toml::value_t::Table>();
-const auto& numbers = data.at("numbers").cast<toml::value_t::Array>();
-```
-
-Unfortunately, if you use `toml::value::cast` to get an array, you would need to
-`cast` each element in `toml::Array` because `toml::Array` is represented as
-an array of `toml::value`.
+Surprisingly, you can also get a `toml::array` as `std::pair` and `std::tuple.`
 
 ```cpp
-const auto& num0 = numbers.at(0).cast<toml::value_t::Integer>();
-const auto& num1 = numbers.at(1).cast<toml::value_t::Integer>();
-const auto& num2 = numbers.at(2).cast<toml::value_t::Integer>();
+const auto tp = toml::get<std::tuple<short, int, unsigned int>>(data.at("numbers"));
 ```
 
-#### toml::get\_or
+The case when you need this functionality is to get an array of arrays.
 
-You can also set default value for `toml::get`.
-
-```cpp
-toml::Table data; // empty table!
-
-const auto value1 = toml::get_or(data, "key1", 42); // value1 => int 42.
-
-toml::Integer i(123);
-const auto value2 = toml::get_or(data, "key1", i);  // value2 => toml::Integer 42.
+```toml
+aofa = [[1,2,3], ["foo", "bar", "baz"]] # toml allows this
 ```
 
-#### toml::value\_t
-
-When you don't know the exact type of toml-value, you can get `enum` type from
-`toml::value`.
+What is the corresponding C++ type? Obviously, it is a `std::pair` of `std::vector`s.
 
 ```cpp
-int i;
-double d;
-std::string s;
-std::vector<int> a;
-const auto t = data.at("something").type();
-switch(t)
+const auto aofa = toml::get<
+    std::pair<std::vector<int>, std::vector<std::string>>
+    >(data.at("aofa"));
+```
+
+If you don't know what the type is inside the array, you can use `toml::array`, which is a `std::vector` of `toml::value`, instead.
+
+```cpp
+const auto aofa  = toml::get<toml::array>(data.at("aofa"));
+const auto first = toml::get<toml::array>(aofa.at(0));
+```
+
+See also [expecting conversion](#expecting-conversion) and [checking-value-type](#checking-value-type).
+
+### Getting tables
+
+`toml::table` is a key component of this library, which is an alias of a `std::unordered_map` from `toml::key (a.k.a. std::string)` to `toml::value`. `toml::parse` returns this as a result.
+
+Since it is just an alias of `std::unordered_map`, it has all the functionalities that `std::unordered_map` has, e.g. `operator[]`, `count`, and `find`.
+
+```cpp
+toml::table data = toml::parse("example.toml");
+if(data.count("title") != 0)
 {
-    case toml::value_t::Integer: i = toml::get<int>(data.at("something")); break;
-    case toml::value_t::Float  : d = toml::get<double>(data.at("something")); break;
-    case toml::value_t::String : s = toml::get<std::string>(data.at("something")); break;
-    case toml::value_t::Array  : a = toml::get<std::vector<int>>(data.at("something")); break;
-    default : throw std::runtime_error("unexpected type : " + toml::stringize(t));
+    data["title"] = std::string("TOML example");
 }
 ```
 
-Okey, but it is painful to write `switch-case` for many time.
-
-#### toml::from\_toml()
-
-The more sophisticated way is using `toml::from_toml` and `std::tie`.
-
-```cpp
-int i = 0;
-double d = 0.;
-std::string s;
-std::vector<int> a;
-
-toml::from_toml(std::tie(i, d, s, a), data.at("something"));
-```
-
-Here, only matched value will be filled.
-The others are left intact after calling `from_toml`.
-It should be noted that `toml::from_toml` returns as usual even if there are no
-matched type.
-
-
-`from_toml` can be used also for single type. 
-
-```cpp
-int i;
-toml::from_toml(i, data.at("something"));
-```
-
-Unlike `toml::get`, `toml::from_toml` does not require to specify the type
-through the template argument because the type can be deduced from argument.
-
-#### toml::value
-
-In toml, `Array` is capable of having `Array` s and each of them possibly have
-different types like this.
+When all the values of the table have the same type, toml11 allows you to convert a `toml::table` to a `map` that contains the convertible type.
 
 ```toml
-array_of_array = [[1,2,3,4,5], ["foo", "bar", "baz"]]
+[tab]
+key1 = "foo" # all the values are
+key2 = "bar" # toml String
 ```
 
-In this case, you can use `toml::value` directly.
-
 ```cpp
-// use toml::value in a container 
-const auto a  = toml::get<std::vector<toml::value>>(data.at("array_of_array"));
-// or you can use default toml::Array.
-const auto a_ = toml::get<toml::Array>(data.at("array_of_array"));
-// you can obtain values from toml::value in the same way as described above.
-const auto ns = toml::get<std::vector<std::int64_t>>(a.at(0));
-const auto ss = toml::get<std::vector<std::string>>(a.at(1));
+const auto tab = toml::get<std::map<std::string, std::string>>(data.at("tab"));
+std::cout << tab["key1"] << std::endl; // foo
+std::cout << tab["key2"] << std::endl; // bar
 ```
 
-#### Array of Table
+### Dotted keys
 
-Of course, you can obtain `array of table` in the same way.
+TOML v0.5.0 has a new feature named "dotted keys". You can chain keys to represent the structure of the data.
+
+```toml
+physical.color = "orange"
+physical.shape = "round"
+```
+
+This is equivalent to the following.
+
+```toml
+[physical]
+color = "orange"
+shape = "round"
+```
+
+You can get both of the above formats with the same c++ code.
+
+```cpp
+const auto physical = toml::get<toml::table>(data.at("physical"));
+const auto color    = toml::get<std::string>(physical.at("color"));
+```
+
+### An array of tables
+
+An array of tables is just an array of tables. You can get it completely in the same way as the other arrays and tables.
 
 ```toml
 array_of_inline_table = [{key = "value1"}, {key = "value2"}, {key = "value3"}]
@@ -211,61 +221,196 @@ key = "value6"
 ```
 
 ```cpp
-const auto aot1 = toml::get<std::vector<toml::Table>>(data.at("array_of_inline_table"))
-const auto aot2 = toml::get<std::vector<toml::Table>>(data.at("array_of_table"))
+const auto aot1 = toml::get<std::vector<toml::table>>(data.at("array_of_inline_table"));
+const auto aot2 = toml::get<std::vector<toml::table>>(data.at("array_of_table"));
 ```
 
-## Documentation
+### Cost of conversion
 
-The toml types and corresponding `enum` name are listed in the table below.
-`value_t` is a scoped-enum defined in the namespace toml.
+Although `toml::get` is convenient, it has additional copy-cost because it copies data contained in `toml::value` to the user-specified type. Of course in some case this overhead is not ignorable.
 
-| toml-type | c++ type                                       | enum                      |
-| --------- | ---------------------------------------------- | ------------------------- |
-| Boolean   | `bool`                                         | `toml::value_t::Boolean`  |
-| Integer   | `std::int64_t`                                 | `toml::value_t::Integer`  |
-| Float     | `double`                                       | `toml::value_t::Float`    |
-| String    | `std::string`                                  | `toml::value_t::String`   |
-| Datetime  | `toml::Datetime`                               | `toml::value_t::Datetime` |
-| Array     | `std::vector<toml::value>`                     | `toml::value_t::Array`    |
-| Table     | `std::unordered_map<std::string, toml::value>` | `toml::value_t::Table`    |
+By passing the exact types, `toml::get` returns reference that has nealy zero overhead.
 
-`Datetime` is the `struct` that is defined in this library.
-Because `std::chrono::system_clock::time_point` is a __time point__, not capable
-of representing a Local Time independent from a specific day.
+``` cpp
+const auto& tab     = toml::get<toml::array>(data.at("tab"));
+const auto& numbers = toml::get<toml::table>(data.at("numbers"));
+```
 
-For user-convenience, `toml::Datetime` is _implicitly_ convertible to
-`std::chrono::system_clock::time_point`. If `toml::Datetime` does not have any
-Date information, the information will be generated from
-`std::chrono::system_clock::now()` when cast is performed.
-
-The definition of Datetime struct is below.
+Unfortunately, in this case you need to call `toml::get` each time you access to the element of `toml::array` because `toml::array` is an array of `toml::value`.
 
 ```cpp
-namespace toml
-{
-template<typename uintT, typename intT>
-struct basic_datetime
-{
-    uintT  year;          // since 0.
-    uintT  month;         // [1-12]
-    uintT  day;           // [1-31]
-    uintT  hour;          // [0-23]
-    uintT  minite;        // [0-59]
-    uintT  second;        // [0-59]
-    uintT  millisecond    // [0-999]
-    uintT  microsecond    // [0-999]
-    intT   offset_hour;   // [-12 - +12]
-    intT   offset_minute; // [-59 - +59]
-};
+const auto& num0 = toml::get<toml::integer>(numbers.at(0));
+const auto& num1 = toml::get<toml::integer>(numbers.at(1));
+const auto& num2 = toml::get<toml::integer>(numbers.at(2));
+```
 
-typedef basic_datetime<unsigned, int> Datetime;
+### Datetime and its variants
+
+TOML v0.5.0 has 4 different datetime objects, `local_date`, `local_time`, `local_datetime`, and `offset_datetime`. With toml11, you can convert `local_time` to your favorite `std::chrono::duration` and others to `std::chrono::system_clock::time_point`.
+
+```toml
+time = 12:30:00
+date = 2018-12-23
+```
+
+```cpp
+const auto dur = toml::get<std::chrono::minutes>(data.at("time")); // 12 * 60 + 30 min
+const auto tp  = toml::get<std::chrono::system_clock::time_point>(data.at("date"));
+```
+
+### Getting with a fallback
+
+ `toml::get_or` returns a default value if `toml::get<T>` failed.
+
+```cpp
+toml::table data; // empty table!
+const auto value = toml::get_or(data, "key", 42); // value => int 42.
+```
+
+`toml::get_or` automatically deduces what type you want to get from the default value you passed.
+
+### Expecting conversion
+
+By using `toml::expect`, you will get your expected value or an error message without throwing `toml::type_error`.
+
+```cpp
+const auto value = toml::expect<std::string>(data.at("title"));
+if(value.is_ok()) {
+    std::cout << value.unwrap() << std::endl;
+} else {
+    std::cout << value.unwrap_err() << std::endl;
 }
 ```
 
-It must be noted that the range of some values in `basic_datetime` is different
-from `std::tm`. For example, month is in the range of `[1,12]` and year starts
-from 0 (not 1900).
+Also, you can pass a function object to modify the expected value.
+
+```cpp
+const auto value = toml::expect<int>(data.at("number"))
+    .map(// function that receives expected type (here, int)
+    [](const int number) -> double {
+        return number * 1.5 + 1.0;
+    }).unwrap_or(/*default value =*/ 3.14);
+```
+
+### Finding value from table
+
+toml11 provides utility function to find a value from `toml::table`. Of course, you can do this in your own way with `toml::get` because it just searches an  `unordered_map` and returns a value if it exists.
+
+```cpp
+const auto data = toml::parse("example.toml");
+const auto num  = toml::find<int>(data, "num", /*for err msg*/"example.toml");
+```
+
+If the value does not exist, it throws `std::out_of_range` with informative error message.
+
+```console
+terminate called after throwing an instance of 'std::out_of_range'
+  what():  [error] key "num" not found in example.toml
+```
+
+You can use this with a `toml::value` that is expected to be a `toml::table`. It automatically casts the value to table.
+
+```cpp
+const auto data = toml::parse("example.toml");
+const auto num  = toml::find<int>(data.at("table"), "num");
+// expecting the following example.toml
+// [table]
+// num = 42
+```
+
+In this case, because the value `data.at("table")` knows the locatoin of itself, you don't need to pass where you find the value. `toml::find` will show you a great error message.
+
+```console
+terminate called after throwing an instance of 'std::out_of_range'
+  what():  [error] key "num" not found
+ --> example.toml
+ 3 | [table]
+   | ~~~~~~~ in this table
+```
+
+If it's not a `toml::table`, the same error as "invalid type" would be thrown.
+
+### Checking value type
+
+When you don't know the exact type of toml-value, you can get `enum` type from `toml::value`.
+
+```cpp
+switch(data.at("something").type())
+{
+    case toml::value_t::Integer: /* do some stuff */; break;
+    case toml::value_t::Float  : /* do some stuff */; break;
+    case toml::value_t::String : /* do some stuff */; break;
+    default : throw std::runtime_error(
+        "unexpected type : " + toml::stringize(data.at("something").type()));
+}
+```
+
+### Fill only the matched value
+
+The more sophisticated way is using `toml::from_toml` and `std::tie`.
+
+```cpp
+toml::table data{{"something", toml::value("foo")}};
+int         i = 0;
+double      d = 0.;
+std::string s;
+toml::from_toml(std::tie(i, d, s), data.at("something"));
+std::cout << i << ", " << d << ", " << s << std::endl; // 0, 0, foo
+```
+
+Here, only matched value will be filled. The others are left intact after calling `from_toml`.
+It should be noted that `toml::from_toml` returns as usual even if there are no matched type.
+
+`from_toml` can be used also for single type. 
+
+```cpp
+int i = 0;
+toml::from_toml(i, data.at("something"));
+```
+
+### Sanitizing UTF-8 codepoints
+
+toml11 shows warning if a value of an escape sequence used to represent unicode character exceeds the unicode range.
+
+```console
+[warning] input codepoint (0011FFFF) is too large to decode as a unicode character. The result may not be able to render to your screen.
+ --> example.toml
+ 3 | exceeds_unicode = "\U0011FFFF example"
+   |                     ~~~~~~~~~ should be in [0x00..0x10FFFF]
+```
+
+Also, toml11 throws `std::domain_error` if the code point exceeds the range that can be represented by utf-8.
+
+```console
+terminate called after throwing an instance of 'std::range_error'
+  what():  [error] input codepoint (0020FFFF) is too large to encode as utf-8.
+ --> example.toml
+ 3 | exceeds_utf8    = "\U0020FFFF example"
+   |                     ~~~~~~~~~ should be in [0x00..0x10FFFF]
+```
+
+## Underlying types
+
+The toml types (can be used as `toml::*` in this library) and corresponding `enum` names are listed in the table below.
+
+| toml::type     | underlying c++ type                          | enum                            |
+| -------------- | -------------------------------------------- | ------------------------------- |
+| Boolean        | `bool`                                       | `toml::value_t::Boolean`        |
+| Integer        | `std::int64_t`                               | `toml::value_t::Integer`        |
+| Float          | `double`                                     | `toml::value_t::Float`          |
+| String         | `toml::string`                               | `toml::value_t::String`         |
+| LocalDate      | `toml::local_date`                           | `toml::value_t::LocalDate`      |
+| LocalTime      | `toml::local_time`                           | `toml::value_t::LocalTime`      |
+| LocalDatetime  | `toml::local_datetime`                       | `toml::value_t::LocalDatetime`  |
+| OffsetDatetime | `toml::offset_datetime`                      | `toml::value_t::offsetDatetime` |
+| Array          | `std::vector<toml::value>`                   | `toml::value_t::Array`          |
+| Table          | `std::unordered_map<std::string, toml::key>` | `toml::value_t::Table`          |
+
+`toml::string` is effectively the same as `std::string` but has an additional flag that represents a kind of a string, `string_t::basic` and `string_t::literal`. Although `std::string` is not an exact toml type, still you can get a reference that points to internal `std::string` by using `toml::get<std::string>()` for convenience.
+
+`Datetime` variants are `struct` that are defined in this library. Because `std::chrono::system_clock::time_point` is a __time point__, not capable of representing a Local Time independent from a specific day.
+
+It is recommended to get `Datetime`s as `std::chrono` classes through `toml::get`.
 
 ## Contributors
 

tests/CMakeLists.txt

@@ -1,15 +1,29 @@
 set(TEST_NAMES
-    test_traits
+    test_datetime
     test_utility
+    test_result
+    test_traits
     test_value
+    test_lex_boolean
+    test_lex_integer
+    test_lex_floating
+    test_lex_datetime
+    test_lex_string
+    test_lex_key_comment
+    test_parse_boolean
+    test_parse_integer
+    test_parse_floating
+    test_parse_string
+    test_parse_datetime
+    test_parse_array
+    test_parse_table
+    test_parse_inline_table
+    test_parse_key
+    test_parse_table_key
+    test_get
+    test_get_related_func
     test_to_toml
     test_from_toml
-    test_get
-    test_get_or
-    test_value_operator
-    test_datetime
-    test_acceptor
-    test_parser
     test_parse_file
     test_parse_unicode
     )

tests/test_acceptor.cpp

@@ -1,592 +0,0 @@
-#define BOOST_TEST_MODULE "test_acceptor"
-#ifdef UNITTEST_FRAMEWORK_LIBRARY_EXIST
-#include <boost/test/unit_test.hpp>
-#else
-#define BOOST_TEST_NO_LIB
-#include <boost/test/included/unit_test.hpp>
-#endif
-#include <toml/acceptor.hpp>
-#include <locale>
-#include <iostream>
-
-BOOST_AUTO_TEST_CASE(test_conditions)
-{
-    {
-        const std::string tmp(" ");
-        const std::string dummy("dummy");
-        BOOST_CHECK(toml::is_space<char>::invoke(tmp.begin(), tmp.end())     == tmp.end());
-        BOOST_CHECK(toml::is_space<char>::invoke(dummy.begin(), dummy.end()) == dummy.begin());
-    }
-
-    {
-        const std::string tmp("\t");
-        const std::string dummy("dummy");
-        BOOST_CHECK(toml::is_tab<char>::invoke(tmp.begin(), tmp.end())     == tmp.end());
-        BOOST_CHECK(toml::is_tab<char>::invoke(dummy.begin(), dummy.end()) == dummy.begin());
-    }
-
-    {
-        for(int i=0; i<10; ++i)
-        {
-            const std::string tmp = std::to_string(i);
-            const std::string dummy("dummy");
-            BOOST_CHECK(toml::is_number<char>::invoke(tmp.begin(), tmp.end())     == tmp.end());
-            BOOST_CHECK(toml::is_number<char>::invoke(dummy.begin(), dummy.end()) == dummy.begin());
-        }
-    }
-
-    {
-        for(char c='a'; c <= 'z'; ++c)
-        {
-            const std::string tmp(1, c);
-            const std::string dummy(1, std::toupper(c));
-            BOOST_CHECK(toml::is_lowercase<char>::invoke(tmp.begin(), tmp.end())     == tmp.end());
-            BOOST_CHECK(toml::is_lowercase<char>::invoke(dummy.begin(), dummy.end()) == dummy.begin());
-        }
-    }
-    {
-        for(char c='A'; c <= 'Z'; ++c)
-        {
-            const std::string tmp(1, c);
-            const std::string dummy(1, std::tolower(c));
-            BOOST_CHECK(toml::is_uppercase<char>::invoke(tmp.begin(), tmp.end())     == tmp.end());
-            BOOST_CHECK(toml::is_uppercase<char>::invoke(dummy.begin(), dummy.end()) == dummy.begin());
-        }
-    }
-    {
-        const std::string tmp(" ");
-        const std::string dummy("a");
-        BOOST_CHECK(toml::is_whitespace<char>::invoke(tmp.begin(), tmp.end())     == tmp.end());
-        BOOST_CHECK(toml::is_whitespace<char>::invoke(dummy.begin(), dummy.end()) == dummy.begin());
-    }
-    {
-        const std::string tmp("\t");
-        const std::string dummy("a");
-        BOOST_CHECK(toml::is_whitespace<char>::invoke(tmp.begin(), tmp.end())     == tmp.end());
-        BOOST_CHECK(toml::is_whitespace<char>::invoke(dummy.begin(), dummy.end()) == dummy.begin());
-    }
-    {
-        const std::string tmp("hoge1-piyo2_fuga3");
-        const std::string dummy(" \t");
-        BOOST_CHECK(toml::is_barekey<char>::invoke(tmp.begin(), tmp.end())     != tmp.begin());
-        BOOST_CHECK(toml::is_barekey<char>::invoke(dummy.begin(), dummy.end()) == dummy.begin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_basic_inline_string)
-{
-    using is_valid = toml::is_basic_inline_string<char>;
-    {
-        const std::string simple("\"hoge1-piyo2_fuga3\"");
-        BOOST_CHECK(is_valid::invoke(simple.cbegin(), simple.cend()) == simple.cend());
-    }
-    {
-        const std::string quote("\"hoge1-\\\"piyo2\\\"_fuga3\"");
-        BOOST_CHECK(is_valid::invoke(quote.cbegin(), quote.cend()) == quote.cend());
-    }
-    {
-        const std::string escape("\"I'm a string. \\\"You can quote me\\\". Name\\tJos\\u00E9\\nLocation\\tSF.\"");
-        BOOST_CHECK(is_valid::invoke(escape.cbegin(), escape.cend()) == escape.cend());
-    }
-    {
-        const std::string empty("\"\"");
-        BOOST_CHECK(is_valid::invoke(empty.cbegin(), empty.cend()) == empty.cend());
-    }
-
-    {
-        const std::string newline("\"newline\r\nhoge\"");
-        BOOST_CHECK(is_valid::invoke(newline.cbegin(), newline.cend()) == newline.cbegin());
-    }
-    {
-        const std::string invalid_escape("\"foo\\abar\"");
-        BOOST_CHECK(is_valid::invoke(invalid_escape.cbegin(), invalid_escape.cend()) == invalid_escape.cbegin());
-    }
-    {
-        const std::string invalid_character("\"foo\10bar\"");
-        BOOST_CHECK(is_valid::invoke(invalid_character.cbegin(), invalid_character.cend()) == invalid_character.cbegin());
-    }
-    {
-        const std::string multi("\"\"\"multiline\"\"\"");
-        BOOST_CHECK(is_valid::invoke(multi.cbegin(), multi.cend()) == multi.cbegin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_basic_multiline_string)
-{
-    using is_valid = toml::is_basic_multiline_string<char>;
-    {
-        const std::string simple("\"\"\"foobar\"\"\"");
-        BOOST_CHECK(is_valid::invoke(simple.cbegin(), simple.cend()) == simple.cend());
-    }
-    {
-        const std::string quote("\"\"\"hoge1-\"piyo2\"_fuga3\"\"\"");
-        BOOST_CHECK(is_valid::invoke(quote.cbegin(), quote.cend()) == quote.cend());
-    }
-    {
-        const std::string newline("\"\"\"hoge1-\npiyo2_\r\nfuga3\"\"\"");
-        BOOST_CHECK(is_valid::invoke(newline.cbegin(), newline.cend()) == newline.cend());
-    }
-    {
-        const std::string escape("\"\"\"I'm a string. \"You can quote me\". Name\\tJos\\u00E9\\nLocation\\tSF.\"\"\"");
-        BOOST_CHECK(is_valid::invoke(escape.cbegin(), escape.cend()) == escape.cend());
-    }
-    {
-        const std::string empty("\"\"\"\"\"\"");
-        BOOST_CHECK(is_valid::invoke(empty.cbegin(), empty.cend()) == empty.cend());
-    }
-    {
-        const std::string ending_backslash("\"\"\"hoge\\\n   piyo\\\n\"\"\"");
-        BOOST_CHECK(is_valid::invoke(ending_backslash.cbegin(), ending_backslash.cend()) == ending_backslash.cend());
-    }
-
-    {
-        const std::string invalid_escape("\"\"\"foo\\abar\"\"\"");
-        BOOST_CHECK(is_valid::invoke(invalid_escape.cbegin(), invalid_escape.cend()) == invalid_escape.cbegin());
-    }
-    {
-        const std::string invalid_character("\"\"\"foo\10bar\"\"\"");
-        BOOST_CHECK(is_valid::invoke(invalid_character.cbegin(), invalid_character.cend()) == invalid_character.cbegin());
-    }
-    {
-        const std::string single("\"singleline\"");
-        BOOST_CHECK(is_valid::invoke(single.cbegin(), single.cend()) == single.cbegin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_literal_inline_string)
-{
-    using is_valid = toml::is_literal_inline_string<char>;
-    {
-        const std::string simple("'foobar'");
-        BOOST_CHECK(is_valid::invoke(simple.cbegin(), simple.cend()) == simple.cend());
-    }
-    {
-        const std::string nonescape("'C:\\Users\\nodejs\\templates'");
-        BOOST_CHECK(is_valid::invoke(nonescape.cbegin(), nonescape.cend()) == nonescape.cend());
-    }
-    {
-        const std::string empty("''");
-        BOOST_CHECK(is_valid::invoke(empty.cbegin(), empty.cend()) == empty.cend());
-    }
-
-    {
-        const std::string quote("'hoge1-'piyo2'_fuga3'");
-        BOOST_CHECK(is_valid::invoke(quote.cbegin(), quote.cend()) == quote.cbegin() + 8);
-    }
-    {
-        const std::string newline("'hoge1-\npiyo2_\r\nfuga3'");
-        BOOST_CHECK(is_valid::invoke(newline.cbegin(), newline.cend()) == newline.cbegin());
-    }
-    {
-        const std::string invalid_character("'foo\10bar'");
-        BOOST_CHECK(is_valid::invoke(invalid_character.cbegin(), invalid_character.cend()) == invalid_character.cbegin());
-    }
-    {
-        const std::string multi("'''multiline'''");
-        BOOST_CHECK(is_valid::invoke(multi.cbegin(), multi.cend()) == multi.cbegin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_literal_multiline_string)
-{
-    using is_valid = toml::is_literal_multiline_string<char>;
-    {
-        const std::string simple("'''foobar'''");
-        BOOST_CHECK(is_valid::invoke(simple.cbegin(), simple.cend()) == simple.cend());
-    }
-    {
-        const std::string quote("'''hoge1-'piyo2'_fuga3'''");
-        BOOST_CHECK(is_valid::invoke(quote.cbegin(), quote.cend()) == quote.cend());
-    }
-    {
-        const std::string nonescape("'''C:\\Users\\nodejs\\templates'''");
-        BOOST_CHECK(is_valid::invoke(nonescape.cbegin(), nonescape.cend()) == nonescape.cend());
-    }
-    {
-        const std::string newline("'''hoge1-\npiyo2_\r\nfuga3'''");
-        BOOST_CHECK(is_valid::invoke(newline.cbegin(), newline.cend()) == newline.cend());
-    }
-    {
-        const std::string empty("''''''");
-        BOOST_CHECK(is_valid::invoke(empty.cbegin(), empty.cend()) == empty.cend());
-    }
-
-    {
-        const std::string invalid_character("'''foo\10bar'''");
-        BOOST_CHECK(is_valid::invoke(invalid_character.cbegin(), invalid_character.cend()) == invalid_character.cbegin());
-    }
-    {
-        const std::string single("'singleline'");
-        BOOST_CHECK(is_valid::invoke(single.cbegin(), single.cend()) == single.cbegin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_integer)
-{
-    using is_valid = toml::is_integer<char>;
-    {
-        const std::string simple("1");
-        BOOST_CHECK(is_valid::invoke(simple.cbegin(), simple.cend()) == simple.cend());
-    }
-    {
-        const std::string psign("+1234");
-        BOOST_CHECK(is_valid::invoke(psign.cbegin(), psign.cend()) == psign.cend());
-        const std::string nsign("-1234");
-        BOOST_CHECK(is_valid::invoke(nsign.cbegin(), nsign.cend()) == nsign.cend());
-    }
-    {
-        const std::string zero("0");
-        BOOST_CHECK(is_valid::invoke(zero.cbegin(), zero.cend()) == zero.cend());
-    }
-    {
-        const std::string us("1_2_3_4_5");
-        BOOST_CHECK(is_valid::invoke(us.cbegin(), us.cend()) == us.cend());
-    }
-
-    {
-        const std::string f("12.34");
-        BOOST_CHECK(is_valid::invoke(f.cbegin(), f.cend()) == f.cbegin()+2);
-    }
-    {
-        const std::string f("12e34");
-        BOOST_CHECK(is_valid::invoke(f.cbegin(), f.cend()) == f.cbegin()+2);
-    }
-    {
-        const std::string ascii("1234a");
-        BOOST_CHECK(is_valid::invoke(ascii.cbegin(), ascii.cend()) == ascii.cbegin()+4);
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_float)
-{
-    using is_valid = toml::is_float<char>;
-    {
-        const std::string simplef("1.0");
-        BOOST_CHECK(is_valid::invoke(simplef.cbegin(), simplef.cend()) == simplef.cend());
-        const std::string simplee("1e0");
-        BOOST_CHECK(is_valid::invoke(simplee.cbegin(), simplee.cend()) == simplee.cend());
-        const std::string both("6.626e-34");
-        BOOST_CHECK(is_valid::invoke(both.cbegin(), both.cend()) == both.cend());
-    }
-    {
-        const std::string psign("+1.0");
-        BOOST_CHECK(is_valid::invoke(psign.cbegin(), psign.cend()) == psign.cend());
-        const std::string nsign("-1.0");
-        BOOST_CHECK(is_valid::invoke(nsign.cbegin(), nsign.cend()) == nsign.cend());
-    }
-    {
-        const std::string psmall("+0.001");
-        BOOST_CHECK(is_valid::invoke(psmall.cbegin(), psmall.cend()) == psmall.cend());
-        const std::string nsmall("-0.001");
-        BOOST_CHECK(is_valid::invoke(nsmall.cbegin(), nsmall.cend()) == nsmall.cend());
-    }
-    {
-        const std::string zero("0.0");
-        BOOST_CHECK(is_valid::invoke(zero.cbegin(), zero.cend()) == zero.cend());
-    }
-    {
-        const std::string us("9_224_617.445_991_228_313");
-        BOOST_CHECK(is_valid::invoke(us.cbegin(), us.cend()) == us.cend());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_boolean)
-{
-    using is_valid = toml::is_boolean<char>;
-    {
-        const std::string t("true");
-        BOOST_CHECK(is_valid::invoke(t.cbegin(), t.cend()) == t.cend());
-        const std::string f("false");
-        BOOST_CHECK(is_valid::invoke(f.cbegin(), f.cend()) == f.cend());
-    }
-    {
-        const std::string t("True");
-        BOOST_CHECK(is_valid::invoke(t.cbegin(), t.cend()) == t.cbegin());
-        const std::string f("False");
-        BOOST_CHECK(is_valid::invoke(f.cbegin(), f.cend()) == f.cbegin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_localtime)
-{
-    using is_valid = toml::is_local_time<char>;
-    {
-        const std::string t("07:32:00");
-        BOOST_CHECK(is_valid::invoke(t.cbegin(), t.cend()) == t.cend());
-        const std::string tf("07:32:00.0000");
-        BOOST_CHECK(is_valid::invoke(tf.cbegin(), tf.cend()) == tf.cend());
-    }
-    {
-        const std::string d("1907-32-00");
-        BOOST_CHECK(is_valid::invoke(d.cbegin(), d.cend()) == d.cbegin());
-        const std::string f("1907:32:00");
-        BOOST_CHECK(is_valid::invoke(f.cbegin(), f.cend()) == f.cbegin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_localdate)
-{
-    using is_valid = toml::is_local_date<char>;
-    {
-        const std::string d("1907-32-00");
-        BOOST_CHECK(is_valid::invoke(d.cbegin(), d.cend()) == d.cend());
-    }
-    {
-        const std::string t("07:32:00");
-        BOOST_CHECK(is_valid::invoke(t.cbegin(), t.cend()) == t.cbegin());
-        const std::string f("1907:32:00");
-        BOOST_CHECK(is_valid::invoke(f.cbegin(),f.cend()) == f.cbegin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_localdatetime)
-{
-    using is_valid = toml::is_local_date_time<char>;
-    {
-        const std::string dt("1907-32-00T07:32:00");
-        BOOST_CHECK(is_valid::invoke(dt.cbegin(), dt.cend()) == dt.cend());
-        const std::string dtf("1907-32-00T07:32:00.0000");
-        BOOST_CHECK(is_valid::invoke(dtf.cbegin(), dtf.cend()) == dtf.cend());
-    }
-    {
-        const std::string d("1907-32-00");
-        BOOST_CHECK(is_valid::invoke(d.cbegin(), d.cend()) == d.cbegin());
-        const std::string t("07:32:00");
-        BOOST_CHECK(is_valid::invoke(t.cbegin(), t.cend()) == t.cbegin());
-        const std::string f("1907-32-00 07:32:00");
-        BOOST_CHECK(is_valid::invoke(f.cbegin(), f.cend()) == f.cbegin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_offsetdatetime)
-{
-    using is_valid = toml::is_offset_date_time<char>;
-    {
-        const std::string dtZ("1907-32-00T07:32:00Z");
-        BOOST_CHECK(is_valid::invoke(dtZ.cbegin(), dtZ.cend()) == dtZ.cend());
-        const std::string dtfZ("1907-32-00T07:32:00.0000Z");
-        BOOST_CHECK(is_valid::invoke(dtfZ.cbegin(), dtfZ.cend()) == dtfZ.cend());
-        const std::string dtp("1907-32-00T07:32:00+12:34");
-        BOOST_CHECK(is_valid::invoke(dtp.cbegin(), dtp.cend()) == dtp.cend());
-        const std::string dtfp("1907-32-00T07:32:00.0000+12:34");
-        BOOST_CHECK(is_valid::invoke(dtfp.cbegin(), dtfp.cend()) == dtfp.cend());
-        const std::string dtn("1907-32-00T07:32:00-12:34");
-        BOOST_CHECK(is_valid::invoke(dtn.cbegin(), dtn.cend()) == dtn.cend());
-        const std::string dtfn("1907-32-00T07:32:00.0000-12:34");
-        BOOST_CHECK(is_valid::invoke(dtfn.cbegin(), dtfn.cend()) == dtfn.cend());
-    }
-    {
-        const std::string d("1907-32-00");
-        BOOST_CHECK(is_valid::invoke(d.cbegin(), d.cend()) == d.cbegin());
-        const std::string t("07:32:00");
-        BOOST_CHECK(is_valid::invoke(t.cbegin(), t.cend()) == t.cbegin());
-        const std::string l("1907-32-00T07:32:00");
-        BOOST_CHECK(is_valid::invoke(l.cbegin(), l.cend()) == l.cbegin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_array)
-{
-    using is_valid = toml::is_array<char>;
-    {
-        const std::string arr0("[]");
-        BOOST_CHECK(is_valid::invoke(arr0.cbegin(), arr0.cend()) == arr0.cend());
-        const std::string arr1("[1,2,3]");
-        BOOST_CHECK(is_valid::invoke(arr1.cbegin(), arr1.cend()) == arr1.cend());
-        const std::string arr2("[ 1,2,3 ]");
-        BOOST_CHECK(is_valid::invoke(arr2.cbegin(), arr2.cend()) == arr2.cend());
-        const std::string arr3("[ 1, 2, 3 ]");
-        BOOST_CHECK(is_valid::invoke(arr3.cbegin(), arr3.cend()) == arr3.cend());
-        const std::string arr4("[ 1, 2, 3, ]");
-        BOOST_CHECK(is_valid::invoke(arr4.cbegin(), arr4.cend()) == arr4.cend());
-        const std::string arr5("[ 1, 2, 3,]");
-        BOOST_CHECK(is_valid::invoke(arr5.cbegin(), arr5.cend()) == arr5.cend());
-        const std::string arr6("[ 1 , 2 , 3 ,]");
-        BOOST_CHECK(is_valid::invoke(arr6.cbegin(), arr6.cend()) == arr6.cend());
-    }
-    {
-        const std::string arr1("[\"red\", \"yellow\", \"green\"]");
-        BOOST_CHECK(is_valid::invoke(arr1.cbegin(), arr1.cend()) == arr1.cend());
-        const std::string arr2("[\"]\", \"#\", \"  \"]");
-        BOOST_CHECK(is_valid::invoke(arr2.cbegin(), arr2.cend()) == arr2.cend());
-        const std::string arr3("[[1, 2, 3], ['a', 'b', 'c']]");
-        BOOST_CHECK(is_valid::invoke(arr3.cbegin(), arr3.cend()) == arr3.cend());
-        const std::string arr4("[{hoge = 1}, {piyo = 'a'}, {fuga = [1,2,3]}]");
-        BOOST_CHECK(is_valid::invoke(arr4.cbegin(), arr4.cend()) == arr4.cend());
-    }
-    {
-        const std::string arr1("[1,\n2,#comment\n3]");
-        BOOST_CHECK(is_valid::invoke(arr1.cbegin(), arr1.cend()) == arr1.cend());
-        const std::string arr2("[#c\n1,\n2,#comment\r\n3]");
-        BOOST_CHECK(is_valid::invoke(arr2.cbegin(), arr2.cend()) == arr2.cend());
-    }
-
-    {
-        const std::string invalid("[1, 3.14, 'string']");
-        BOOST_CHECK(is_valid::invoke(invalid.cbegin(), invalid.cend()) == invalid.cbegin());
-        const std::string valid("[[1,2,3], [3.14, 2.71, 1.414], ['foo', 'bar']]");
-        BOOST_CHECK(is_valid::invoke(valid.cbegin(), valid.cend()) == valid.cend());
-    }
-
-}
-
-BOOST_AUTO_TEST_CASE(test_inline_table)
-{
-    using is_valid = toml::is_inline_table<char>;
-    {
-        const std::string tab0("{}");
-        BOOST_CHECK(is_valid::invoke(tab0.cbegin(), tab0.cend()) == tab0.cend());
-        const std::string tab1("{hoge=1,piyo=2,fuga=3}");
-        BOOST_CHECK(is_valid::invoke(tab1.cbegin(), tab1.cend()) == tab1.cend());
-        const std::string tab2("{hoge=1, piyo=2, fuga=3}");
-        BOOST_CHECK(is_valid::invoke(tab2.cbegin(), tab2.cend()) == tab2.cend());
-        const std::string tab3("{ hoge=1, piyo=2, fuga=3 }");
-        BOOST_CHECK(is_valid::invoke(tab3.cbegin(), tab3.cend()) == tab3.cend());
-        const std::string tab4("{ hoge = 1, piyo = 2, fuga = 3 }");
-        BOOST_CHECK(is_valid::invoke(tab4.cbegin(), tab4.cend()) == tab4.cend());
-        const std::string tab5("{hoge = 1, piyo = 2, fuga = 3}");
-        BOOST_CHECK(is_valid::invoke(tab5.cbegin(), tab5.cend()) == tab5.cend());
-        const std::string tab6("{hoge = 1, piyo = 2, fuga = 3,}");
-        BOOST_CHECK(is_valid::invoke(tab6.cbegin(), tab6.cend()) == tab6.cend());
-        const std::string tab7("{hoge = 1, piyo = 2, fuga = 3, }");
-        BOOST_CHECK(is_valid::invoke(tab7.cbegin(), tab7.cend()) == tab7.cend());
-    }
-    {
-        const std::string tab0("{hoge = 1, piyo = 2.0}");
-        BOOST_CHECK(is_valid::invoke(tab0.cbegin(), tab0.cend()) == tab0.cend());
-        const std::string tab1("{hoge = [1,2,3], piyo = {fuga = {}}}");
-        BOOST_CHECK(is_valid::invoke(tab1.cbegin(), tab1.cend()) == tab1.cend());
-        const std::string tab2("{hoge = \"}\", piyo = \"#\"}");
-        BOOST_CHECK(is_valid::invoke(tab2.cbegin(), tab2.cend()) == tab2.cend());
-        const std::string tab3("{b=true, i=1, f=2.0, d=1907-03-02T07:32:00, s='str', a=[1,2,3], t={foo=1}}");
-        BOOST_CHECK(is_valid::invoke(tab3.cbegin(), tab3.cend()) == tab3.cend());
-    }
-    {
-        const std::string tab0("{hoge = \"}\",\n piyo = \"#\"}");
-        BOOST_CHECK(is_valid::invoke(tab0.cbegin(), tab0.cend()) == tab0.cbegin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_table_definition)
-{
-    using is_valid = toml::is_table_definition<char>;
-    {
-        const std::string simple("[hoge]");
-        BOOST_CHECK(is_valid::invoke(simple.cbegin(), simple.cend()) == simple.cend());
-        const std::string dotted("[hoge.piyo.fuga]");
-        BOOST_CHECK(is_valid::invoke(dotted.cbegin(), dotted.cend()) == dotted.cend());
-        const std::string spaced_dotted("[hoge . piyo .fuga. foo]");
-        BOOST_CHECK(is_valid::invoke(spaced_dotted.cbegin(), spaced_dotted.cend()) == spaced_dotted.cend());
-        const std::string quoted("[\"hoge\"]");
-        BOOST_CHECK(is_valid::invoke(quoted.cbegin(), quoted.cend()) == quoted.cend());
-        const std::string quoted_dot("[\"hoge\".'piyo'.fuga]");
-        BOOST_CHECK(is_valid::invoke(quoted_dot.cbegin(), quoted_dot.cend()) == quoted_dot.cend());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_array_of_table_definition)
-{
-    using is_valid = toml::is_array_of_table_definition<char>;
-    {
-        const std::string simple("[[hoge]]");
-        BOOST_CHECK(is_valid::invoke(simple.cbegin(), simple.cend()) == simple.cend());
-        const std::string dotted("[[hoge.piyo.fuga]]");
-        BOOST_CHECK(is_valid::invoke(dotted.cbegin(), dotted.cend()) == dotted.cend());
-        const std::string spaced_dotted("[[hoge . piyo .fuga. foo]]");
-        BOOST_CHECK(is_valid::invoke(spaced_dotted.cbegin(), spaced_dotted.cend()) == spaced_dotted.cend());
-        const std::string quoted("[[\"hoge\"]]");
-        BOOST_CHECK(is_valid::invoke(quoted.cbegin(), quoted.cend()) == quoted.cend());
-        const std::string quoted_dot("[[\"hoge\".'piyo'.fuga]]");
-        BOOST_CHECK(is_valid::invoke(quoted_dot.cbegin(), quoted_dot.cend()) == quoted_dot.cend());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_key)
-{
-    using is_valid = toml::is_key<char>;
-    {
-        const std::string simple("foobar");
-        BOOST_CHECK(is_valid::invoke(simple.cbegin(), simple.cend()) == simple.cend());
-        const std::string quoted("\"foo#bar.baz\\n\"");
-        BOOST_CHECK(is_valid::invoke(quoted.cbegin(), quoted.cend()) == quoted.cend());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_value)
-{
-    using is_valid = toml::is_value<char>;
-    {
-        const std::string boolean("true");
-        BOOST_CHECK(is_valid::invoke(boolean.cbegin(), boolean.cend()) == boolean.cend());
-        const std::string integer("-42");
-        BOOST_CHECK(is_valid::invoke(integer.cbegin(), integer.cend()) == integer.cend());
-        const std::string floating("-42e0");
-        BOOST_CHECK(is_valid::invoke(floating.cbegin(), floating.cend()) == floating.cend());
-        const std::string string("\"string\"");
-        BOOST_CHECK(is_valid::invoke(string.cbegin(), string.cend()) == string.cend());
-        const std::string datetime("1901-01-01T00:00:00");
-        BOOST_CHECK(is_valid::invoke(datetime.cbegin(), datetime.cend()) == datetime.cend());
-        const std::string array("[1,2,3]");
-        BOOST_CHECK(is_valid::invoke(array.cbegin(), array.cend()) == array.cend());
-        const std::string table("{foo=1,bar=2.0,baz='3'}");
-        BOOST_CHECK(is_valid::invoke(table.cbegin(), table.cend()) == table.cend());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_key_value_pair)
-{
-    using is_valid = toml::is_key_value_pair<char>;
-    {
-        const std::string kv("key=1");
-        BOOST_CHECK(is_valid::invoke(kv.cbegin(), kv.cend()) == kv.cend());
-    }
-    {
-        const std::string kv("key = 1");
-        BOOST_CHECK(is_valid::invoke(kv.cbegin(), kv.cend()) == kv.cend());
-    }
-    {
-        const std::string kv("    key = 1");
-        BOOST_CHECK(is_valid::invoke(kv.cbegin(), kv.cend()) == kv.cend());
-    }
-    {
-        const std::string kv("    key = 1   ");
-        BOOST_CHECK(is_valid::invoke(kv.cbegin(), kv.cend()) == kv.cend());
-    }
-    {
-        const std::string boolean("key = true");
-        BOOST_CHECK(is_valid::invoke(boolean.cbegin(), boolean.cend()) == boolean.cend());
-        const std::string integer("key = -42");
-        BOOST_CHECK(is_valid::invoke(integer.cbegin(), integer.cend()) == integer.cend());
-        const std::string floating("key = -42.0");
-        BOOST_CHECK(is_valid::invoke(floating.cbegin(), floating.cend()) == floating.cend());
-        const std::string string("key = \"string\"");
-        BOOST_CHECK(is_valid::invoke(string.cbegin(), string.cend()) == string.cend());
-        const std::string datetime("key = 1901-01-01T00:00:00");
-        BOOST_CHECK(is_valid::invoke(datetime.cbegin(), datetime.cend()) == datetime.cend());
-        const std::string array("key = [1,2,3]");
-        BOOST_CHECK(is_valid::invoke(array.cbegin(), array.cend()) == array.cend());
-        const std::string table("key = {foo=1,bar=2.0,baz='3'}");
-        BOOST_CHECK(is_valid::invoke(table.cbegin(), table.cend()) == table.cend());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_empty_line)
-{
-    using is_valid = toml::is_empty_line<char>;
-    {
-        const std::string empty("\n");
-        BOOST_CHECK(is_valid::invoke(empty.cbegin(), empty.cend()) == empty.cend());
-    }
-    {
-        const std::string empty("    \n");
-        BOOST_CHECK(is_valid::invoke(empty.cbegin(), empty.cend()) == empty.cend());
-    }
-    {
-        const std::string empty("#comment\n");
-        BOOST_CHECK(is_valid::invoke(empty.cbegin(), empty.cend()) == empty.cend());
-    }
-    {
-        const std::string empty("    #comment\n");
-        BOOST_CHECK(is_valid::invoke(empty.cbegin(), empty.cend()) == empty.cend());
-    }
-}

tests/test_datetime.cpp

@@ -5,26 +5,117 @@
 #define BOOST_TEST_NO_LIB
 #include <boost/test/included/unit_test.hpp>
 #endif
-#include <toml.hpp>
-#include <thread>
+#include <toml/datetime.hpp>
 
-BOOST_AUTO_TEST_CASE(test_datetime_convertible)
+BOOST_AUTO_TEST_CASE(test_local_date)
 {
-    const auto now = std::chrono::system_clock::now();
-    toml::Datetime d1(now);
-    const std::chrono::system_clock::time_point cvt(d1);
-    toml::Datetime d2(cvt);
+    const toml::local_date date(2018, toml::month_t::Jan, 1);
+    const toml::local_date date1(date);
+    BOOST_CHECK_EQUAL(date, date1);
 
-    BOOST_CHECK_EQUAL(d1, d2);
+    const std::chrono::system_clock::time_point tp(date);
+    const toml::local_date date2(tp);
+    BOOST_CHECK_EQUAL(date, date2);
 
-    const auto time = std::chrono::system_clock::to_time_t(now);
-    toml::Datetime d3(time);
-    toml::Datetime d4(std::chrono::system_clock::from_time_t(time));
+    const toml::local_date date3(2017, toml::month_t::Dec, 31);
+    BOOST_CHECK(date > date3);
 
-    BOOST_CHECK_EQUAL(d3, d4);
-
-    std::this_thread::sleep_for(std::chrono::seconds(1));
-    const auto later = std::chrono::system_clock::now();
-    toml::Datetime d5(later);
-    BOOST_CHECK(d1 < d5);
+    std::ostringstream oss;
+    oss << date;
+    BOOST_CHECK_EQUAL(oss.str(), std::string("2018-01-01"));
+}
+
+BOOST_AUTO_TEST_CASE(test_local_time)
+{
+    const toml::local_time time(12, 30, 45);
+    const toml::local_time time1(time);
+    BOOST_CHECK_EQUAL(time, time1);
+
+    const std::chrono::nanoseconds dur(time);
+    std::chrono::nanoseconds ns(0);
+    ns += std::chrono::hours  (12);
+    ns += std::chrono::minutes(30);
+    ns += std::chrono::seconds(45);
+    BOOST_CHECK_EQUAL(dur.count(), ns.count());
+
+    const toml::local_time time3(12, 15, 45);
+    BOOST_CHECK(time > time3);
+
+    {
+        std::ostringstream oss;
+        oss << time;
+        BOOST_CHECK_EQUAL(oss.str(), std::string("12:30:45"));
+    }
+
+    {
+        const toml::local_time time4(12, 30, 45, 123, 456);
+        std::ostringstream oss;
+        oss << time4;
+        BOOST_CHECK_EQUAL(oss.str(), std::string("12:30:45.123456"));
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_time_offset)
+{
+    const toml::time_offset time(9, 30);
+    const toml::time_offset time1(time);
+    BOOST_CHECK_EQUAL(time, time1);
+
+    const std::chrono::minutes dur(time);
+    std::chrono::minutes m(0);
+    m += std::chrono::hours  (9);
+    m += std::chrono::minutes(30);
+    BOOST_CHECK_EQUAL(dur.count(), m.count());
+
+    const toml::time_offset time2(9, 0);
+    BOOST_CHECK(time2 < time);
+
+    std::ostringstream oss;
+    oss << time;
+    BOOST_CHECK_EQUAL(oss.str(), std::string("+09:30"));
+}
+
+BOOST_AUTO_TEST_CASE(test_local_datetime)
+{
+    const toml::local_datetime dt(toml::local_date(2018, toml::month_t::Jan, 1),
+                                  toml::local_time(12, 30, 45));
+    const toml::local_datetime dt1(dt);
+    BOOST_CHECK_EQUAL(dt, dt1);
+
+    const std::chrono::system_clock::time_point tp(dt);
+    const toml::local_datetime dt2(tp);
+    BOOST_CHECK_EQUAL(dt, dt2);
+
+    std::ostringstream oss;
+    oss << dt;
+    BOOST_CHECK_EQUAL(oss.str(), std::string("2018-01-01T12:30:45"));
+}
+
+BOOST_AUTO_TEST_CASE(test_offset_datetime)
+{
+    const toml::offset_datetime dt(toml::local_date(2018, toml::month_t::Jan, 1),
+                                   toml::local_time(12, 30, 45),
+                                   toml::time_offset(9, 30));
+    const toml::offset_datetime dt1(dt);
+    BOOST_CHECK_EQUAL(dt, dt1);
+
+    const std::chrono::system_clock::time_point tp1(dt);
+    const toml::offset_datetime dt2(tp1);
+    const std::chrono::system_clock::time_point tp2(dt2);
+    BOOST_CHECK(tp1 == tp2);
+
+    {
+        std::ostringstream oss;
+        oss << dt;
+        BOOST_CHECK_EQUAL(oss.str(), std::string("2018-01-01T12:30:45+09:30"));
+    }
+    {
+        const toml::offset_datetime dt3(
+                toml::local_date(2018, toml::month_t::Jan, 1),
+                toml::local_time(12, 30, 45),
+                toml::time_offset(0, 0));
+        std::ostringstream oss;
+        oss << dt3;
+        BOOST_CHECK_EQUAL(oss.str(), std::string("2018-01-01T12:30:45Z"));
+    }
 }

tests/test_from_toml.cpp

@@ -12,161 +12,52 @@
 #include <deque>
 #include <array>
 
-BOOST_AUTO_TEST_CASE(test_from_toml_exact)
+BOOST_AUTO_TEST_CASE(test_from_toml)
 {
-    toml::Boolean  b(true);
-    toml::Integer  i(42);
-    toml::Float    f(3.14);
-    toml::String   s("hoge");
-    toml::Datetime d(std::chrono::system_clock::now());
-    toml::Array    a;
-    a.emplace_back(2);
-    a.emplace_back(7);
-    a.emplace_back(1);
-    a.emplace_back(8);
-    a.emplace_back(2);
-    toml::Table    t;
-    t.emplace("val1", true);
-    t.emplace("val2", 42);
-    t.emplace("val3", 3.14);
-    t.emplace("val4", "piyo");
+    toml::boolean    b = false;
+    toml::integer    i = 0;
+    toml::floating   f = 0.;
+    toml::string     s;
+    toml::local_date dt;
+    toml::array      a;
+    toml::table      t;
+    {
+        toml::value v(true);
+        toml::from_toml(std::tie(b, i, f, s, dt, a, t), v);
+        BOOST_CHECK_EQUAL(b, true);
+    }
+    {
+        toml::value v(42);
+        toml::from_toml(std::tie(b, i, f, s, dt, a, t), v);
+        BOOST_CHECK_EQUAL(i, 42);
+    }
+    {
+        toml::value v(3.14);
+        toml::from_toml(std::tie(b, i, f, s, dt, a, t), v);
+        BOOST_CHECK_EQUAL(f, 3.14);
+    }
+    {
+        toml::value v("foo");
 
-    toml::value v1(b);
-    toml::value v2(i);
-    toml::value v3(f);
-    toml::value v4(s);
-    toml::value v5(d);
-    toml::value v6(a);
-    toml::value v7(t);
-
-    toml::Boolean  u1;
-    toml::Integer  u2;
-    toml::Float    u3;
-    toml::String   u4;
-    toml::Datetime u5;
-    toml::Array    u6;
-    toml::Table    u7;
-
-    toml::from_toml(u1, v1);
-    toml::from_toml(u2, v2);
-    toml::from_toml(u3, v3);
-    toml::from_toml(u4, v4);
-    toml::from_toml(u5, v5);
-    toml::from_toml(u6, v6);
-    toml::from_toml(u7, v7);
-
-    BOOST_CHECK_EQUAL(u1, b);
-    BOOST_CHECK_EQUAL(u2, i);
-    BOOST_CHECK_EQUAL(u3, f);
-    BOOST_CHECK_EQUAL(u4, s);
-    BOOST_CHECK_EQUAL(u6.at(0).cast<toml::value_t::Integer>(), a.at(0).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u6.at(1).cast<toml::value_t::Integer>(), a.at(1).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u6.at(2).cast<toml::value_t::Integer>(), a.at(2).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u6.at(3).cast<toml::value_t::Integer>(), a.at(3).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u6.at(4).cast<toml::value_t::Integer>(), a.at(4).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u7.at("val1").cast<toml::value_t::Boolean>(), true);
-    BOOST_CHECK_EQUAL(u7.at("val2").cast<toml::value_t::Integer>(), 42);
-    BOOST_CHECK_CLOSE_FRACTION(u7.at("val3").cast<toml::value_t::Float>(),3.14, 1e-3);
-    BOOST_CHECK_EQUAL(u7.at("val4").cast<toml::value_t::String>(),  "piyo");
-}
-
-BOOST_AUTO_TEST_CASE(test_from_toml_cast)
-{
-    toml::Integer  i(42);
-    toml::Float    f(3.14);
-    toml::Array    a{2, 7, 1, 8, 2};
-    toml::Table    t{{"val1", true}, {"val2", 42}, {"val3", 3.14}, {"val4", "piyo"}};
-
-    toml::value vi(i);
-    toml::value vf(f);
-    toml::value va(a);
-    toml::value vt(t);
-
-    int                     u1;
-    std::size_t             u2;
-    float                   u3;
-    std::list<int>          u4;
-    std::deque<std::size_t> u5;
-    std::array<long, 5>     u6;
-    std::map<std::string, toml::value> u7;
-
-    std::list<int>          expect_list{2,7,1,8,2};
-    std::deque<std::size_t> expect_deque{2,7,1,8,2};
-    std::array<long, 5>     expect_array{{2,7,1,8,2}};
-
-    toml::from_toml(u1, vi);
-    toml::from_toml(u2, vi);
-    toml::from_toml(u3, vf);
-    toml::from_toml(u4, va);
-    toml::from_toml(u5, va);
-    toml::from_toml(u6, va);
-    toml::from_toml(u7, vt);
-
-    BOOST_CHECK_EQUAL(u1, 42);
-    BOOST_CHECK_EQUAL(u2, 42ul);
-    BOOST_CHECK_CLOSE_FRACTION(u3, 3.14, 1e-3);
-
-    const bool same_list  = (u4 == expect_list);
-    const bool same_deque = (u5 == expect_deque);
-    const bool same_array = (u6 == expect_array);
-    BOOST_CHECK(same_list);
-    BOOST_CHECK(same_deque);
-    BOOST_CHECK(same_array);
-
-    BOOST_CHECK_EQUAL(u7["val1"].cast<toml::value_t::Boolean>(), true);
-    BOOST_CHECK_EQUAL(u7["val2"].cast<toml::value_t::Integer>(), 42);
-    BOOST_CHECK_CLOSE_FRACTION(u7["val3"].cast<toml::value_t::Float>(), 3.14, 1e-3);
-    BOOST_CHECK_EQUAL(u7["val4"].cast<toml::value_t::String >(), "piyo");
-
-}
-
-BOOST_AUTO_TEST_CASE(test_from_toml_tie)
-{
-    toml::Boolean  b(42);
-    toml::Integer  i(42);
-    toml::Float    f(3.14);
-    toml::Array    a;
-    a.emplace_back(2);
-    a.emplace_back(7);
-    a.emplace_back(1);
-    a.emplace_back(8);
-    a.emplace_back(2);
-    toml::Table    t;
-    t.emplace("val1", true);
-    t.emplace("val2", 42);
-    t.emplace("val3", 3.14);
-    t.emplace("val4", "piyo");
-
-    toml::value vb(b);
-    toml::value vi(i);
-    toml::value vf(f);
-    toml::value va(a);
-    toml::value vt(t);
-
-    bool            ub;
-    int             ui;
-    float           uf;
-    std::deque<int> ua;
-    std::map<std::string, toml::value> ut;
-
-    toml::from_toml(std::tie(ub, ui, uf, ua, ut), vb);
-    toml::from_toml(std::tie(ub, ui, uf, ua, ut), vi);
-    toml::from_toml(std::tie(ub, ui, uf, ua, ut), vf);
-    toml::from_toml(std::tie(ub, ui, uf, ua, ut), va);
-    toml::from_toml(std::tie(ub, ui, uf, ua, ut), va);
-    toml::from_toml(std::tie(ub, ui, uf, ua, ut), vt);
-
-    BOOST_CHECK_EQUAL(ub, true);
-    BOOST_CHECK_EQUAL(ui, 42);
-    BOOST_CHECK_CLOSE_FRACTION(uf, 3.14, 1e-3);
-    BOOST_CHECK_EQUAL(ua.at(0), 2);
-    BOOST_CHECK_EQUAL(ua.at(1), 7);
-    BOOST_CHECK_EQUAL(ua.at(2), 1);
-    BOOST_CHECK_EQUAL(ua.at(3), 8);
-    BOOST_CHECK_EQUAL(ua.at(4), 2);
-    BOOST_CHECK_EQUAL(ut["val1"].cast<toml::value_t::Boolean>(), true);
-    BOOST_CHECK_EQUAL(ut["val2"].cast<toml::value_t::Integer>(), 42);
-    BOOST_CHECK_CLOSE_FRACTION(ut["val3"].cast<toml::value_t::Float>(), 3.14, 1e-3);
-    BOOST_CHECK_EQUAL(ut["val4"].cast<toml::value_t::String >(), "piyo");
+        toml::from_toml(std::tie(b, i, f, s, dt, a, t), v);
+        BOOST_CHECK_EQUAL(s, "foo");
+    }
+    {
+        toml::value v(toml::local_date(2018, toml::month_t::Apr, 22));
+        toml::from_toml(std::tie(b, i, f, s, dt, a, t), v);
+        BOOST_CHECK(dt == toml::local_date(2018, toml::month_t::Apr, 22));
+    }
+    {
+        toml::array ref{toml::value(42), toml::value(54)};
+        toml::value v(ref);
+        toml::from_toml(std::tie(b, i, f, s, dt, a, t), v);
+        BOOST_CHECK(ref == a);
+    }
+    {
+        toml::table ref{{"key1", 42}, {"key2", 3.14}};
+        toml::value v(ref);
+        toml::from_toml(std::tie(b, i, f, s, dt, a, t), v);
+        BOOST_CHECK(ref == t);
+    }
 }
 

tests/test_get.cpp

@@ -5,7 +5,8 @@
 #define BOOST_TEST_NO_LIB
 #include <boost/test/included/unit_test.hpp>
 #endif
-#include <toml.hpp>
+#include <toml/value.hpp>
+#include <toml/get.hpp>
 #include <map>
 #include <unordered_map>
 #include <list>
@@ -15,98 +16,350 @@
 
 BOOST_AUTO_TEST_CASE(test_get_exact)
 {
-    toml::Boolean  b(true);
-    toml::Integer  i(42);
-    toml::Float    f(3.14);
-    toml::String   s("hoge");
-    toml::Array    a;
-    a.emplace_back(2);
-    a.emplace_back(7);
-    a.emplace_back(1);
-    a.emplace_back(8);
-    a.emplace_back(2);
-    toml::Table    t;
-    t.emplace("val1", true);
-    t.emplace("val2", 42);
-    t.emplace("val3", 3.14);
-    t.emplace("val4", "piyo");
+    {
+        toml::value v(true);
+        BOOST_CHECK_EQUAL(true, toml::get<toml::boolean>(v));
 
-    toml::value v1(b);
-    toml::value v2(i);
-    toml::value v3(f);
-    toml::value v4(s);
-    toml::value v6(a);
-    toml::value v7(t);
+        toml::get<toml::boolean>(v) = false;
+        BOOST_CHECK_EQUAL(false, toml::get<toml::boolean>(v));
+    }
+    {
+        toml::value v(42);
+        BOOST_CHECK_EQUAL(toml::integer(42), toml::get<toml::integer>(v));
 
-    toml::Boolean  u1 = toml::get<toml::Boolean >(v1);
-    toml::Integer  u2 = toml::get<toml::Integer >(v2);
-    toml::Float    u3 = toml::get<toml::Float   >(v3);
-    toml::String   u4 = toml::get<toml::String  >(v4);
-    toml::Array    u6 = toml::get<toml::Array   >(v6);
-    toml::Table    u7 = toml::get<toml::Table   >(v7);
+        toml::get<toml::integer>(v) = 54;
+        BOOST_CHECK_EQUAL(toml::integer(54), toml::get<toml::integer>(v));
+    }
+    {
+        toml::value v(3.14);
+        BOOST_CHECK_EQUAL(toml::floating(3.14), toml::get<toml::floating>(v));
 
-    BOOST_CHECK_EQUAL(u1, b);
-    BOOST_CHECK_EQUAL(u2, i);
-    BOOST_CHECK_EQUAL(u3, f);
-    BOOST_CHECK_EQUAL(u4, s);
-    BOOST_CHECK_EQUAL(u6.at(0).cast<toml::value_t::Integer>(), a.at(0).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u6.at(1).cast<toml::value_t::Integer>(), a.at(1).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u6.at(2).cast<toml::value_t::Integer>(), a.at(2).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u6.at(3).cast<toml::value_t::Integer>(), a.at(3).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u6.at(4).cast<toml::value_t::Integer>(), a.at(4).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u7.at("val1").cast<toml::value_t::Boolean>(), true);
-    BOOST_CHECK_EQUAL(u7.at("val2").cast<toml::value_t::Integer>(), 42);
-    BOOST_CHECK_CLOSE_FRACTION(u7.at("val3").cast<toml::value_t::Float>(),3.14, 1e-3);
-    BOOST_CHECK_EQUAL(u7.at("val4").cast<toml::value_t::String>(),  "piyo");
+        toml::get<toml::floating>(v) = 2.71;
+        BOOST_CHECK_EQUAL(toml::floating(2.71), toml::get<toml::floating>(v));
+    }
+    {
+        toml::value v("foo");
+        BOOST_CHECK_EQUAL(toml::string("foo", toml::string_t::basic),
+                          toml::get<toml::string>(v));
+
+        toml::get<toml::string>(v).str += "bar";
+        BOOST_CHECK_EQUAL(toml::string("foobar", toml::string_t::basic),
+                          toml::get<toml::string>(v));
+    }
+    {
+        toml::value v("foo", toml::string_t::literal);
+        BOOST_CHECK_EQUAL(toml::string("foo", toml::string_t::literal),
+                          toml::get<toml::string>(v));
+
+        toml::get<toml::string>(v).str += "bar";
+        BOOST_CHECK_EQUAL(toml::string("foobar", toml::string_t::literal),
+                          toml::get<toml::string>(v));
+    }
+    {
+        toml::local_date d(2018, toml::month_t::Apr, 22);
+        toml::value v(d);
+        BOOST_CHECK(d == toml::get<toml::local_date>(v));
+
+        toml::get<toml::local_date>(v).year = 2017;
+        d.year = 2017;
+        BOOST_CHECK(d == toml::get<toml::local_date>(v));
+    }
+    {
+        toml::local_time t(12, 30, 45);
+        toml::value v(t);
+        BOOST_CHECK(t == toml::get<toml::local_time>(v));
+
+        toml::get<toml::local_time>(v).hour = 9;
+        t.hour = 9;
+        BOOST_CHECK(t == toml::get<toml::local_time>(v));
+    }
+    {
+        toml::local_datetime dt(toml::local_date(2018, toml::month_t::Apr, 22),
+                                toml::local_time(12, 30, 45));
+        toml::value v(dt);
+        BOOST_CHECK(dt == toml::get<toml::local_datetime>(v));
+
+        toml::get<toml::local_datetime>(v).date.year = 2017;
+        dt.date.year = 2017;
+        BOOST_CHECK(dt == toml::get<toml::local_datetime>(v));
+    }
+    {
+        toml::offset_datetime dt(toml::local_datetime(
+                    toml::local_date(2018, toml::month_t::Apr, 22),
+                    toml::local_time(12, 30, 45)), toml::time_offset(9, 0));
+        toml::value v(dt);
+        BOOST_CHECK(dt == toml::get<toml::offset_datetime>(v));
+
+        toml::get<toml::offset_datetime>(v).date.year = 2017;
+        dt.date.year = 2017;
+        BOOST_CHECK(dt == toml::get<toml::offset_datetime>(v));
+    }
+    {
+        toml::array vec;
+        vec.push_back(toml::value(42));
+        vec.push_back(toml::value(54));
+        toml::value v(vec);
+        BOOST_CHECK(vec == toml::get<toml::array>(v));
+
+        toml::get<toml::array>(v).push_back(toml::value(123));
+        vec.push_back(toml::value(123));
+        BOOST_CHECK(vec == toml::get<toml::array>(v));
+    }
+    {
+        toml::table tab;
+        tab["key1"] = toml::value(42);
+        tab["key2"] = toml::value(3.14);
+        toml::value v(tab);
+        BOOST_CHECK(tab == toml::get<toml::table>(v));
+
+        toml::get<toml::table>(v)["key3"] = toml::value(123);
+        tab["key3"] = toml::value(123);
+        BOOST_CHECK(tab == toml::get<toml::table>(v));
+    }
 }
 
-
-BOOST_AUTO_TEST_CASE(test_get_cast)
+BOOST_AUTO_TEST_CASE(test_get_integer_type)
 {
-    toml::Integer  i(42);
-    toml::Float    f(3.14);
-    toml::String   s("hoge");
-    toml::Datetime d(std::chrono::system_clock::now());
-    toml::Array    a;
-    a.emplace_back(2);
-    a.emplace_back(7);
-    a.emplace_back(1);
-    a.emplace_back(8);
-    a.emplace_back(2);
-    toml::Table    t;
-    t.emplace("val1", true);
-    t.emplace("val2", 42);
-    t.emplace("val3", 3.14);
-    t.emplace("val4", "piyo");
-
-    toml::value v2(i);
-    toml::value v3(f);
-    toml::value v4(s);
-    toml::value v5(d);
-    toml::value v6(a);
-    toml::value v7(t);
-
-    const auto u2 = toml::get<std::size_t>(v2);
-    const auto u3 = toml::get<float>(v3);
-    const auto u4 = toml::get<std::deque<int>>(v6);
-    const auto u5 = toml::get<std::list<int> >(v6);
-    const auto u6 = toml::get<std::array<int,5>>(v6);
-    std::map<std::string, toml::value> u7 = toml::get<std::map<std::string, toml::value>>(v7);
-
-    std::deque<int> r4{2,7,1,8,2};
-    std::list<int>  r5{2,7,1,8,2};
-    std::array<int, 5> r6{{2,7,1,8,2}};
-
-    BOOST_CHECK_EQUAL(u2, 42ul);
-    BOOST_CHECK_CLOSE_FRACTION(u3, 3.14, 1e-3);
-    const bool dq = r4 == u4;
-    const bool ls = r5 == u5;
-    const bool ar = r6 == u6;
-    BOOST_CHECK(dq);
-    BOOST_CHECK(ls);
-    BOOST_CHECK(ar);
-    BOOST_CHECK_EQUAL(u7.at("val1").cast<toml::value_t::Boolean>(), true);
-    BOOST_CHECK_EQUAL(u7.at("val2").cast<toml::value_t::Integer>(), 42);
-    BOOST_CHECK_CLOSE_FRACTION(u7.at("val3").cast<toml::value_t::Float>(),3.14, 1e-3);
-    BOOST_CHECK_EQUAL(u7.at("val4").cast<toml::value_t::String>(),  "piyo");
+    {
+        toml::value v(42);
+        BOOST_CHECK_EQUAL(int(42),           toml::get<int          >(v));
+        BOOST_CHECK_EQUAL(short(42),         toml::get<short        >(v));
+        BOOST_CHECK_EQUAL(char(42),          toml::get<char         >(v));
+        BOOST_CHECK_EQUAL(unsigned(42),      toml::get<unsigned     >(v));
+        BOOST_CHECK_EQUAL(long(42),          toml::get<long         >(v));
+        BOOST_CHECK_EQUAL(std::int64_t(42),  toml::get<std::int64_t >(v));
+        BOOST_CHECK_EQUAL(std::uint64_t(42), toml::get<std::uint64_t>(v));
+        BOOST_CHECK_EQUAL(std::int16_t(42),  toml::get<std::int16_t >(v));
+        BOOST_CHECK_EQUAL(std::uint16_t(42), toml::get<std::uint16_t>(v));
+    }
 }
+
+BOOST_AUTO_TEST_CASE(test_get_floating_type)
+{
+    {
+        toml::value v(3.14);
+        BOOST_CHECK_EQUAL(static_cast<float      >(3.14), toml::get<float      >(v));
+        BOOST_CHECK_EQUAL(static_cast<double     >(3.14), toml::get<double     >(v));
+        BOOST_CHECK_EQUAL(static_cast<long double>(3.14), toml::get<long double>(v));
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_get_string_type)
+{
+    {
+        toml::value v("foo", toml::string_t::basic);
+        BOOST_CHECK_EQUAL("foo", toml::get<std::string>(v));
+        toml::get<std::string>(v) += "bar";
+        BOOST_CHECK_EQUAL("foobar", toml::get<std::string>(v));
+    }
+    {
+        toml::value v("foo", toml::string_t::literal);
+        BOOST_CHECK_EQUAL("foo", toml::get<std::string>(v));
+        toml::get<std::string>(v) += "bar";
+        BOOST_CHECK_EQUAL("foobar", toml::get<std::string>(v));
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_get_toml_array)
+{
+    toml::value v(toml::array(0));
+    toml::get<toml::array>(v).push_back(toml::value(42));
+    toml::get<toml::array>(v).push_back(toml::value(54));
+    toml::get<toml::array>(v).push_back(toml::value(69));
+    toml::get<toml::array>(v).push_back(toml::value(72));
+
+    const std::vector<int>         vec = toml::get<std::vector<int>>(v);
+    const std::list<short>         lst = toml::get<std::list<short>>(v);
+    const std::deque<std::int64_t> deq = toml::get<std::deque<std::int64_t>>(v);
+
+    BOOST_CHECK_EQUAL(42, vec.at(0));
+    BOOST_CHECK_EQUAL(54, vec.at(1));
+    BOOST_CHECK_EQUAL(69, vec.at(2));
+    BOOST_CHECK_EQUAL(72, vec.at(3));
+
+    std::list<short>::const_iterator iter = lst.begin();
+    BOOST_CHECK_EQUAL(static_cast<short>(42), *(iter++));
+    BOOST_CHECK_EQUAL(static_cast<short>(54), *(iter++));
+    BOOST_CHECK_EQUAL(static_cast<short>(69), *(iter++));
+    BOOST_CHECK_EQUAL(static_cast<short>(72), *(iter++));
+
+    BOOST_CHECK_EQUAL(static_cast<std::int64_t>(42), deq.at(0));
+    BOOST_CHECK_EQUAL(static_cast<std::int64_t>(54), deq.at(1));
+    BOOST_CHECK_EQUAL(static_cast<std::int64_t>(69), deq.at(2));
+    BOOST_CHECK_EQUAL(static_cast<std::int64_t>(72), deq.at(3));
+
+    std::array<int, 4> ary = toml::get<std::array<int, 4>>(v);
+    BOOST_CHECK_EQUAL(static_cast<int>(42), ary.at(0));
+    BOOST_CHECK_EQUAL(static_cast<int>(54), ary.at(1));
+    BOOST_CHECK_EQUAL(static_cast<int>(69), ary.at(2));
+    BOOST_CHECK_EQUAL(static_cast<int>(72), ary.at(3));
+
+    std::tuple<int, short, unsigned, long> tpl =
+        toml::get<std::tuple<int, short, unsigned, long>>(v);
+    BOOST_CHECK_EQUAL(static_cast<int     >(42), std::get<0>(tpl));
+    BOOST_CHECK_EQUAL(static_cast<short   >(54), std::get<1>(tpl));
+    BOOST_CHECK_EQUAL(static_cast<unsigned>(69), std::get<2>(tpl));
+    BOOST_CHECK_EQUAL(static_cast<long    >(72), std::get<3>(tpl));
+
+    toml::value p(toml::array{});
+    toml::get<toml::array>(p).push_back(toml::value(3.14));
+    toml::get<toml::array>(p).push_back(toml::value(2.71));
+    std::pair<double, double> pr = toml::get<std::pair<double, double> >(p);
+    BOOST_CHECK_EQUAL(3.14, pr.first);
+    BOOST_CHECK_EQUAL(2.71, pr.second);
+}
+
+BOOST_AUTO_TEST_CASE(test_get_toml_array_of_array)
+{
+    toml::value v1(toml::array{});
+    toml::get<toml::array>(v1).push_back(toml::value(42));
+    toml::get<toml::array>(v1).push_back(toml::value(54));
+    toml::get<toml::array>(v1).push_back(toml::value(69));
+    toml::get<toml::array>(v1).push_back(toml::value(72));
+
+    toml::value v2(toml::array{});
+    toml::get<toml::array>(v2).push_back(toml::value("foo"));
+    toml::get<toml::array>(v2).push_back(toml::value("bar"));
+    toml::get<toml::array>(v2).push_back(toml::value("baz"));
+
+    toml::value v(toml::array(2));
+    toml::get<toml::array>(v).at(0) = v1;
+    toml::get<toml::array>(v).at(1) = v2;
+
+    std::pair<std::vector<int>, std::vector<std::string>> p =
+        toml::get<std::pair<std::vector<int>, std::vector<std::string>>>(v);
+
+    BOOST_CHECK_EQUAL(p.first.at(0), 42);
+    BOOST_CHECK_EQUAL(p.first.at(1), 54);
+    BOOST_CHECK_EQUAL(p.first.at(2), 69);
+    BOOST_CHECK_EQUAL(p.first.at(3), 72);
+
+    BOOST_CHECK_EQUAL(p.second.at(0), "foo");
+    BOOST_CHECK_EQUAL(p.second.at(1), "bar");
+    BOOST_CHECK_EQUAL(p.second.at(2), "baz");
+
+    std::tuple<std::vector<int>, std::vector<std::string>> t =
+        toml::get<std::tuple<std::vector<int>, std::vector<std::string>>>(v);
+
+    BOOST_CHECK_EQUAL(std::get<0>(t).at(0), 42);
+    BOOST_CHECK_EQUAL(std::get<0>(t).at(1), 54);
+    BOOST_CHECK_EQUAL(std::get<0>(t).at(2), 69);
+    BOOST_CHECK_EQUAL(std::get<0>(t).at(3), 72);
+
+    BOOST_CHECK_EQUAL(std::get<1>(t).at(0), "foo");
+    BOOST_CHECK_EQUAL(std::get<1>(t).at(1), "bar");
+    BOOST_CHECK_EQUAL(std::get<1>(t).at(2), "baz");
+}
+
+BOOST_AUTO_TEST_CASE(test_get_toml_table)
+{
+    toml::value v1(toml::table{
+            {"key1", 1},
+            {"key2", 2},
+            {"key3", 3},
+            {"key4", 4}
+            });
+
+    const auto v = toml::get<std::map<std::string, int>>(v1);
+    BOOST_CHECK_EQUAL(v.at("key1"), 1);
+    BOOST_CHECK_EQUAL(v.at("key2"), 2);
+    BOOST_CHECK_EQUAL(v.at("key3"), 3);
+    BOOST_CHECK_EQUAL(v.at("key4"), 4);
+}
+
+
+BOOST_AUTO_TEST_CASE(test_get_toml_local_date)
+{
+    toml::value v1(toml::local_date{2018, toml::month_t::Apr, 1});
+    const auto date = std::chrono::system_clock::to_time_t(
+            toml::get<std::chrono::system_clock::time_point>(v1));
+
+    std::tm t;
+    t.tm_year = 2018 - 1900;
+    t.tm_mon  = 4    - 1;
+    t.tm_mday = 1;
+    t.tm_hour = 0;
+    t.tm_min  = 0;
+    t.tm_sec  = 0;
+    t.tm_isdst = -1;
+    const auto c = std::mktime(&t);
+    BOOST_CHECK_EQUAL(c, date);
+}
+
+BOOST_AUTO_TEST_CASE(test_get_toml_local_time)
+{
+    toml::value v1(toml::local_time{12, 30, 45});
+    const auto time = toml::get<std::chrono::seconds>(v1);
+    BOOST_CHECK(time == std::chrono::hours(12) +
+                        std::chrono::minutes(30) + std::chrono::seconds(45));
+}
+
+BOOST_AUTO_TEST_CASE(test_get_toml_local_datetime)
+{
+    toml::value v1(toml::local_datetime(
+                toml::local_date{2018, toml::month_t::Apr, 1},
+                toml::local_time{12, 30, 45}));
+
+    const auto date = std::chrono::system_clock::to_time_t(
+            toml::get<std::chrono::system_clock::time_point>(v1));
+    std::tm t;
+    t.tm_year = 2018 - 1900;
+    t.tm_mon  = 4    - 1;
+    t.tm_mday = 1;
+    t.tm_hour = 12;
+    t.tm_min  = 30;
+    t.tm_sec  = 45;
+    t.tm_isdst = -1;
+    const auto c = std::mktime(&t);
+    BOOST_CHECK_EQUAL(c, date);
+}
+
+BOOST_AUTO_TEST_CASE(test_get_toml_offset_datetime)
+{
+    {
+    toml::value v1(toml::offset_datetime(
+                toml::local_date{2018, toml::month_t::Apr, 1},
+                toml::local_time{12, 30, 0},
+                toml::time_offset{9, 0}));
+    //    2018-04-01T12:30:00+09:00
+    // == 2018-04-01T03:30:00Z
+
+    const auto date = toml::get<std::chrono::system_clock::time_point>(v1);
+    const auto timet = std::chrono::system_clock::to_time_t(date);
+
+    // get time_t as gmtime (2018-04-01T03:30:00Z)
+    const auto tmp = std::gmtime(std::addressof(timet)); // XXX not threadsafe!
+    BOOST_CHECK(tmp);
+    const auto tm = *tmp;
+    BOOST_CHECK_EQUAL(tm.tm_year + 1900, 2018);
+    BOOST_CHECK_EQUAL(tm.tm_mon  + 1,       4);
+    BOOST_CHECK_EQUAL(tm.tm_mday,           1);
+    BOOST_CHECK_EQUAL(tm.tm_hour,           3);
+    BOOST_CHECK_EQUAL(tm.tm_min,           30);
+    BOOST_CHECK_EQUAL(tm.tm_sec,            0);
+    }
+
+    {
+    toml::value v1(toml::offset_datetime(
+                toml::local_date{2018, toml::month_t::Apr, 1},
+                toml::local_time{12, 30, 0},
+                toml::time_offset{-8, 0}));
+    //    2018-04-01T12:30:00-08:00
+    // == 2018-04-01T20:30:00Z
+
+    const auto date = toml::get<std::chrono::system_clock::time_point>(v1);
+    const auto timet = std::chrono::system_clock::to_time_t(date);
+
+    // get time_t as gmtime (2018-04-01T03:30:00Z)
+    const auto tmp = std::gmtime(std::addressof(timet)); // XXX not threadsafe!
+    BOOST_CHECK(tmp);
+    const auto tm = *tmp;
+    BOOST_CHECK_EQUAL(tm.tm_year + 1900, 2018);
+    BOOST_CHECK_EQUAL(tm.tm_mon  + 1,       4);
+    BOOST_CHECK_EQUAL(tm.tm_mday,           1);
+    BOOST_CHECK_EQUAL(tm.tm_hour,          20);
+    BOOST_CHECK_EQUAL(tm.tm_min,           30);
+    BOOST_CHECK_EQUAL(tm.tm_sec,            0);
+    }
+}
+

tests/test_get_or.cpp

@@ -1,88 +0,0 @@
-#define BOOST_TEST_MODULE "test_get_or"
-#ifdef UNITTEST_FRAMEWORK_LIBRARY_EXIST
-#include <boost/test/unit_test.hpp>
-#else
-#define BOOST_TEST_NO_LIB
-#include <boost/test/included/unit_test.hpp>
-#endif
-#include <toml.hpp>
-#include <map>
-#include <unordered_map>
-#include <list>
-#include <deque>
-#include <array>
-
-
-BOOST_AUTO_TEST_CASE(test_get_or_exist)
-{
-    toml::Boolean  raw_v1(true);
-    toml::Integer  raw_v2(42);
-    toml::Float    raw_v3(3.14);
-    toml::String   raw_v4("hoge");
-    toml::Array    raw_v5{2,7,1,8,2};
-    toml::Table    raw_v6{{"key", 42}};
-
-    toml::value v1(raw_v1);
-    toml::value v2(raw_v2);
-    toml::value v3(raw_v3);
-    toml::value v4(raw_v4);
-    toml::value v5(raw_v5);
-    toml::value v6(raw_v6);
-
-    toml::Table table{
-        {"value1", v1},
-        {"value2", v2},
-        {"value3", v3},
-        {"value4", v4},
-        {"value5", v5},
-        {"value6", v6}
-    };
-
-    toml::Boolean u1 = toml::get_or(table, "value1", raw_v1);
-    toml::Integer u2 = toml::get_or(table, "value2", raw_v2);
-    toml::Float   u3 = toml::get_or(table, "value3", raw_v3);
-    toml::String  u4 = toml::get_or(table, "value4", raw_v4);
-    toml::Array   u5 = toml::get_or(table, "value5", raw_v5);
-    toml::Table   u6 = toml::get_or(table, "value6", raw_v6);
-
-    BOOST_CHECK_EQUAL(u1, raw_v1);
-    BOOST_CHECK_EQUAL(u2, raw_v2);
-    BOOST_CHECK_EQUAL(u3, raw_v3);
-    BOOST_CHECK_EQUAL(u4, raw_v4);
-    BOOST_CHECK_EQUAL(u5.at(0).cast<toml::value_t::Integer>(), raw_v5.at(0).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u5.at(1).cast<toml::value_t::Integer>(), raw_v5.at(1).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u5.at(2).cast<toml::value_t::Integer>(), raw_v5.at(2).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u5.at(3).cast<toml::value_t::Integer>(), raw_v5.at(3).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u5.at(4).cast<toml::value_t::Integer>(), raw_v5.at(4).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u6.at("key").cast<toml::value_t::Integer>(), 42);
-}
-
-BOOST_AUTO_TEST_CASE(test_get_or_empty)
-{
-    toml::Boolean  raw_v1(true);
-    toml::Integer  raw_v2(42);
-    toml::Float    raw_v3(3.14);
-    toml::String   raw_v4("hoge");
-    toml::Array    raw_v5{2,7,1,8,2};
-    toml::Table    raw_v6{{"key", 42}};
-
-    toml::Table    table; // empty!
-
-    toml::Boolean  u1 = toml::get_or(table, std::string("value1"), raw_v1);
-    toml::Integer  u2 = toml::get_or(table, std::string("value2"), raw_v2);
-    toml::Float    u3 = toml::get_or(table, std::string("value3"), raw_v3);
-    toml::String   u4 = toml::get_or(table, std::string("value4"), raw_v4);
-    toml::Array    u5 = toml::get_or(table, std::string("value5"), raw_v5);
-    toml::Table    u6 = toml::get_or(table, std::string("value6"), raw_v6);
-
-    BOOST_CHECK_EQUAL(u1, raw_v1);
-    BOOST_CHECK_EQUAL(u2, raw_v2);
-    BOOST_CHECK_EQUAL(u3, raw_v3);
-    BOOST_CHECK_EQUAL(u4, raw_v4);
-    BOOST_CHECK_EQUAL(u5.at(0).cast<toml::value_t::Integer>(), raw_v5.at(0).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u5.at(1).cast<toml::value_t::Integer>(), raw_v5.at(1).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u5.at(2).cast<toml::value_t::Integer>(), raw_v5.at(2).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u5.at(3).cast<toml::value_t::Integer>(), raw_v5.at(3).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u5.at(4).cast<toml::value_t::Integer>(), raw_v5.at(4).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(u6.at("key").cast<toml::value_t::Integer>(), 42);
-}

tests/test_get_related_func.cpp

@@ -0,0 +1,76 @@
+#define BOOST_TEST_MODULE "test_get_or"
+#ifdef UNITTEST_FRAMEWORK_LIBRARY_EXIST
+#include <boost/test/unit_test.hpp>
+#else
+#define BOOST_TEST_NO_LIB
+#include <boost/test/included/unit_test.hpp>
+#endif
+#include <toml.hpp>
+#include <map>
+#include <unordered_map>
+#include <list>
+#include <deque>
+#include <array>
+
+BOOST_AUTO_TEST_CASE(test_find)
+{
+    {
+        toml::value v(true);
+        bool thrown = false;
+        try
+        {
+            toml::find<toml::boolean>(v, "key");
+        }
+        catch(toml::type_error const& te)
+        {
+            thrown = true;
+        }
+        BOOST_CHECK(thrown);
+    }
+
+    {
+        toml::table v{{"num", 42}};
+        BOOST_CHECK_EQUAL(42, toml::find<int>(v, "num"));
+        toml::find<toml::integer>(v, "num") = 54;
+        BOOST_CHECK_EQUAL(54, toml::find<int>(v, "num"));
+    }
+
+    {
+        toml::value v = toml::table{{"num", 42}};
+        BOOST_CHECK_EQUAL(42, toml::find<int>(v, "num"));
+        toml::find<toml::integer>(v, "num") = 54;
+        BOOST_CHECK_EQUAL(54, toml::find<int>(v, "num"));
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_get_or)
+{
+    {
+        toml::table v{{"num", 42}};
+        BOOST_CHECK_EQUAL(42, toml::get_or<int>(v, "num", 0));
+        BOOST_CHECK_EQUAL(0,  toml::get_or<int>(v, "foo", 0));
+    }
+    {
+        toml::value v = toml::table{{"num", 42}};
+        BOOST_CHECK_EQUAL(42, toml::get_or<int>(v, "num", 0));
+        BOOST_CHECK_EQUAL(0,  toml::get_or<int>(v, "foo", 0));
+    }
+    {
+        toml::value v1(42);
+        toml::value v2(3.14);
+        BOOST_CHECK_EQUAL(42, toml::get_or<int>(v1, 0));
+        BOOST_CHECK_EQUAL(0,  toml::get_or<int>(v2, 0));
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_expect)
+{
+    {
+        toml::value v1(42);
+        toml::value v2(3.14);
+        BOOST_CHECK_EQUAL(42, toml::expect<int>(v1).unwrap_or(0));
+        BOOST_CHECK_EQUAL( 0, toml::expect<int>(v2).unwrap_or(0));
+        BOOST_CHECK_EQUAL("42",   toml::expect<int>(v1).map([](int i){return std::to_string(i);}).unwrap_or(std::string("none")));
+        BOOST_CHECK_EQUAL("none", toml::expect<int>(v2).map([](int i){return std::to_string(i);}).unwrap_or(std::string("none")));
+    }
+}

tests/test_lex_aux.hpp

@@ -0,0 +1,35 @@
+#include <iostream>
+#include <iomanip>
+#include <algorithm>
+#include <toml/region.hpp>
+#include <toml/result.hpp>
+
+#define TOML11_TEST_LEX_ACCEPT(lxr, tkn, expct)                                \
+do {                                                                           \
+    const std::string token   (tkn);                                           \
+    const std::string expected(expct);                                         \
+    toml::detail::location<std::string> loc("test", token);                    \
+    const auto result = lxr::invoke(loc);                                      \
+    BOOST_CHECK(result.is_ok());                                               \
+    if(result.is_ok()){                                                        \
+    const auto region = result.unwrap();                                       \
+    BOOST_CHECK_EQUAL(region.str(), expected);                                 \
+    BOOST_CHECK_EQUAL(region.str().size(), expected.size());                   \
+    BOOST_CHECK_EQUAL(static_cast<std::size_t>(std::distance(                  \
+                    loc.begin(), loc.iter())), region.size());                 \
+    } else {                                                                   \
+    std::cerr << "lexer " << lxr::pattern() << " failed with input `";         \
+    std::cerr << token << "`. expected `" << expected << "`\n";                \
+    std::cerr << "reason: " << result.unwrap_err() << '\n';                    \
+    }                                                                          \
+} while(false);                                                                \
+/**/
+
+#define TOML11_TEST_LEX_REJECT(lxr, tkn)                                       \
+do {                                                                           \
+    const std::string token   (tkn);                                           \
+    toml::detail::location<std::string> loc("test", token);                    \
+    const auto result = lxr::invoke(loc);                                      \
+    BOOST_CHECK(result.is_err());                                              \
+    BOOST_CHECK(loc.begin() == loc.iter());                                    \
+} while(false); /**/

tests/test_lex_boolean.cpp

@@ -0,0 +1,23 @@
+#define BOOST_TEST_MODULE "test_lex_boolean"
+#include <boost/test/unit_test.hpp>
+#include <toml/lexer.hpp>
+#include "test_lex_aux.hpp"
+
+using namespace toml;
+using namespace detail;
+
+BOOST_AUTO_TEST_CASE(test_correct)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_boolean, "true", "true");
+    TOML11_TEST_LEX_ACCEPT(lex_boolean, "false", "false");
+    TOML11_TEST_LEX_ACCEPT(lex_boolean, "true  # trailing", "true");
+    TOML11_TEST_LEX_ACCEPT(lex_boolean, "false # trailing", "false");
+}
+
+BOOST_AUTO_TEST_CASE(test_invalid)
+{
+    TOML11_TEST_LEX_REJECT(lex_boolean, "TRUE");
+    TOML11_TEST_LEX_REJECT(lex_boolean, "FALSE");
+    TOML11_TEST_LEX_REJECT(lex_boolean, "True");
+    TOML11_TEST_LEX_REJECT(lex_boolean, "False");
+}

tests/test_lex_datetime.cpp

@@ -0,0 +1,57 @@
+#define BOOST_TEST_MODULE "test_lex_datetime"
+#include <boost/test/unit_test.hpp>
+#include <toml/lexer.hpp>
+#include "test_lex_aux.hpp"
+
+using namespace toml;
+using namespace detail;
+
+BOOST_AUTO_TEST_CASE(test_offset_datetime)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_offset_date_time,
+            "1979-05-27T07:32:00Z",
+            "1979-05-27T07:32:00Z");
+    TOML11_TEST_LEX_ACCEPT(lex_offset_date_time,
+            "1979-05-27T07:32:00-07:00",
+            "1979-05-27T07:32:00-07:00");
+    TOML11_TEST_LEX_ACCEPT(lex_offset_date_time,
+            "1979-05-27T07:32:00.999999-07:00",
+            "1979-05-27T07:32:00.999999-07:00");
+
+    TOML11_TEST_LEX_ACCEPT(lex_offset_date_time,
+            "1979-05-27 07:32:00Z",
+            "1979-05-27 07:32:00Z");
+    TOML11_TEST_LEX_ACCEPT(lex_offset_date_time,
+            "1979-05-27 07:32:00-07:00",
+            "1979-05-27 07:32:00-07:00");
+    TOML11_TEST_LEX_ACCEPT(lex_offset_date_time,
+            "1979-05-27 07:32:00.999999-07:00",
+            "1979-05-27 07:32:00.999999-07:00");
+}
+
+BOOST_AUTO_TEST_CASE(test_local_datetime)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_local_date_time,
+            "1979-05-27T07:32:00",
+            "1979-05-27T07:32:00");
+    TOML11_TEST_LEX_ACCEPT(lex_local_date_time,
+            "1979-05-27T07:32:00.999999",
+            "1979-05-27T07:32:00.999999");
+
+    TOML11_TEST_LEX_ACCEPT(lex_local_date_time,
+            "1979-05-27 07:32:00",
+            "1979-05-27 07:32:00");
+    TOML11_TEST_LEX_ACCEPT(lex_local_date_time,
+            "1979-05-27 07:32:00.999999",
+            "1979-05-27 07:32:00.999999");
+}
+
+BOOST_AUTO_TEST_CASE(test_local_date)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_local_date, "1979-05-27", "1979-05-27");
+}
+BOOST_AUTO_TEST_CASE(test_local_time)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_local_time, "07:32:00", "07:32:00");
+    TOML11_TEST_LEX_ACCEPT(lex_local_time, "07:32:00.999999", "07:32:00.999999");
+}

tests/test_lex_floating.cpp

@@ -0,0 +1,84 @@
+#define BOOST_TEST_MODULE "test_lex_floating"
+#include <boost/test/unit_test.hpp>
+#include <toml/lexer.hpp>
+#include <limits>
+#include "test_lex_aux.hpp"
+
+using namespace toml;
+using namespace detail;
+
+BOOST_AUTO_TEST_CASE(test_fractional_valid)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_float, "1.0",               "1.0"              );
+    TOML11_TEST_LEX_ACCEPT(lex_float, "0.1",               "0.1"              );
+    TOML11_TEST_LEX_ACCEPT(lex_float, "0.001",             "0.001"            );
+    TOML11_TEST_LEX_ACCEPT(lex_float, "0.100",             "0.100"            );
+    TOML11_TEST_LEX_ACCEPT(lex_float, "+3.14",             "+3.14"            );
+    TOML11_TEST_LEX_ACCEPT(lex_float, "-3.14",             "-3.14"            );
+    TOML11_TEST_LEX_ACCEPT(lex_float, "3.1415_9265_3589",  "3.1415_9265_3589" );
+    TOML11_TEST_LEX_ACCEPT(lex_float, "+3.1415_9265_3589", "+3.1415_9265_3589");
+    TOML11_TEST_LEX_ACCEPT(lex_float, "-3.1415_9265_3589", "-3.1415_9265_3589");
+    TOML11_TEST_LEX_ACCEPT(lex_float, "123_456.789",       "123_456.789"      );
+    TOML11_TEST_LEX_ACCEPT(lex_float, "+123_456.789",      "+123_456.789"     );
+    TOML11_TEST_LEX_ACCEPT(lex_float, "-123_456.789",      "-123_456.789"     );
+}
+
+BOOST_AUTO_TEST_CASE(test_fractional_invalid)
+{
+    TOML11_TEST_LEX_REJECT(lex_float, "0.");
+    TOML11_TEST_LEX_REJECT(lex_float, ".0");
+    TOML11_TEST_LEX_REJECT(lex_float, "01.0");
+    TOML11_TEST_LEX_REJECT(lex_float, "3,14");
+    TOML11_TEST_LEX_REJECT(lex_float, "+-1.0");
+    TOML11_TEST_LEX_REJECT(lex_float, "1._0");
+}
+
+BOOST_AUTO_TEST_CASE(test_exponential_valid)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_float, "1e10",       "1e10");      
+    TOML11_TEST_LEX_ACCEPT(lex_float, "1e+10",      "1e+10");     
+    TOML11_TEST_LEX_ACCEPT(lex_float, "1e-10",      "1e-10");     
+    TOML11_TEST_LEX_ACCEPT(lex_float, "+1e10",      "+1e10");     
+    TOML11_TEST_LEX_ACCEPT(lex_float, "+1e+10",     "+1e+10");    
+    TOML11_TEST_LEX_ACCEPT(lex_float, "+1e-10",     "+1e-10");    
+    TOML11_TEST_LEX_ACCEPT(lex_float, "-1e10",      "-1e10");     
+    TOML11_TEST_LEX_ACCEPT(lex_float, "-1e+10",     "-1e+10");    
+    TOML11_TEST_LEX_ACCEPT(lex_float, "-1e-10",     "-1e-10");    
+    TOML11_TEST_LEX_ACCEPT(lex_float, "123e-10",    "123e-10");   
+    TOML11_TEST_LEX_ACCEPT(lex_float, "1E10",       "1E10");      
+    TOML11_TEST_LEX_ACCEPT(lex_float, "1E+10",      "1E+10");     
+    TOML11_TEST_LEX_ACCEPT(lex_float, "1E-10",      "1E-10");     
+    TOML11_TEST_LEX_ACCEPT(lex_float, "123E-10",    "123E-10");   
+    TOML11_TEST_LEX_ACCEPT(lex_float, "1_2_3E-10",  "1_2_3E-10"); 
+    TOML11_TEST_LEX_ACCEPT(lex_float, "1_2_3E-1_0", "1_2_3E-1_0");
+}
+
+BOOST_AUTO_TEST_CASE(test_exponential_invalid)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_float, "1e1E0", "1e1"); 
+    TOML11_TEST_LEX_ACCEPT(lex_float, "1E1e0", "1E1");
+}
+
+BOOST_AUTO_TEST_CASE(test_both_valid)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_float, "6.02e23",          "6.02e23");
+    TOML11_TEST_LEX_ACCEPT(lex_float, "6.02e+23",         "6.02e+23");
+    TOML11_TEST_LEX_ACCEPT(lex_float, "1.112_650_06e-17", "1.112_650_06e-17");
+}
+
+BOOST_AUTO_TEST_CASE(test_both_invalid)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_float, "1e1.0",  "1e1");
+    TOML11_TEST_LEX_REJECT(lex_float, "01e1.0");
+}
+
+BOOST_AUTO_TEST_CASE(test_special_floating_point)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_float,  "inf",  "inf");
+    TOML11_TEST_LEX_ACCEPT(lex_float, "+inf", "+inf");
+    TOML11_TEST_LEX_ACCEPT(lex_float, "-inf", "-inf");
+
+    TOML11_TEST_LEX_ACCEPT(lex_float,  "nan",  "nan");
+    TOML11_TEST_LEX_ACCEPT(lex_float, "+nan", "+nan");
+    TOML11_TEST_LEX_ACCEPT(lex_float, "-nan", "-nan");
+}

tests/test_lex_integer.cpp

@@ -0,0 +1,101 @@
+#define BOOST_TEST_MODULE "test_lex_integer"
+#include <boost/test/unit_test.hpp>
+#include <toml/lexer.hpp>
+#include "test_lex_aux.hpp"
+
+using namespace toml;
+using namespace detail;
+
+BOOST_AUTO_TEST_CASE(test_decimal_correct)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "1234",        "1234"       );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "+1234",       "+1234"      );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "-1234",       "-1234"      );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0",           "0"          );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "1_2_3_4",     "1_2_3_4"    );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "+1_2_3_4",    "+1_2_3_4"   );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "-1_2_3_4",    "-1_2_3_4"   );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "123_456_789", "123_456_789");
+}
+
+BOOST_AUTO_TEST_CASE(test_decimal_invalid)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "123+45",  "123");
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "123-45",  "123");
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "01234",   "0");
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "123__45", "123");
+
+    TOML11_TEST_LEX_REJECT(lex_integer, "_1234");
+}
+
+BOOST_AUTO_TEST_CASE(test_hex_correct)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0xDEADBEEF",  "0xDEADBEEF" );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0xdeadbeef",  "0xdeadbeef" );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0xDEADbeef",  "0xDEADbeef" );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0xDEAD_BEEF", "0xDEAD_BEEF");
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0xdead_beef", "0xdead_beef");
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0xdead_BEEF", "0xdead_BEEF");
+
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0xFF",     "0xFF"    );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0x00FF",   "0x00FF"  );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0x0000FF", "0x0000FF");
+}
+
+BOOST_AUTO_TEST_CASE(test_hex_invalid)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0xAPPLE",     "0xA");
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0xDEAD+BEEF", "0xDEAD");
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0xDEAD__BEEF", "0xDEAD");
+
+    TOML11_TEST_LEX_REJECT(lex_hex_int, "0x_DEADBEEF");
+    TOML11_TEST_LEX_REJECT(lex_hex_int, "0x+DEADBEEF");
+    TOML11_TEST_LEX_REJECT(lex_hex_int, "-0xFF"      );
+    TOML11_TEST_LEX_REJECT(lex_hex_int, "-0x00FF"    );
+
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0x_DEADBEEF", "0" );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0x+DEADBEEF", "0" );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "-0xFF"      , "-0" );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "-0x00FF"    , "-0" );
+}
+
+BOOST_AUTO_TEST_CASE(test_oct_correct)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0o777",    "0o777"  );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0o7_7_7",  "0o7_7_7");
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0o007",    "0o007"  );
+
+}
+
+BOOST_AUTO_TEST_CASE(test_oct_invalid)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0o77+7", "0o77");
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0o1__0", "0o1");
+
+    TOML11_TEST_LEX_REJECT(lex_oct_int, "0o800" );
+    TOML11_TEST_LEX_REJECT(lex_oct_int, "-0o777");
+    TOML11_TEST_LEX_REJECT(lex_oct_int, "0o+777");
+    TOML11_TEST_LEX_REJECT(lex_oct_int, "0o_10" );
+
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0o800",  "0");
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "-0o777", "-0");
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0o+777", "0");
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0o_10",  "0");
+}
+
+BOOST_AUTO_TEST_CASE(test_bin_correct)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0b10000",    "0b10000"   );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0b010000",   "0b010000"  );
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0b01_00_00", "0b01_00_00");
+    TOML11_TEST_LEX_ACCEPT(lex_integer, "0b111111",   "0b111111"  );
+}
+
+BOOST_AUTO_TEST_CASE(test_bin_invalid)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_bin_int, "0b11__11", "0b11");
+    TOML11_TEST_LEX_ACCEPT(lex_bin_int, "0b11+11" , "0b11");
+
+    TOML11_TEST_LEX_REJECT(lex_bin_int, "-0b10000");
+    TOML11_TEST_LEX_REJECT(lex_bin_int, "0b_1111" );
+}

tests/test_lex_key_comment.cpp

@@ -0,0 +1,53 @@
+#define BOOST_TEST_MODULE "lex_key_comment_test"
+#include <boost/test/unit_test.hpp>
+#include <toml/lexer.hpp>
+#include "test_lex_aux.hpp"
+
+using namespace toml;
+using namespace detail;
+
+BOOST_AUTO_TEST_CASE(test_bare_key)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_key, "barekey",  "barekey");
+    TOML11_TEST_LEX_ACCEPT(lex_key, "bare-key", "bare-key");
+    TOML11_TEST_LEX_ACCEPT(lex_key, "bare_key", "bare_key");
+    TOML11_TEST_LEX_ACCEPT(lex_key, "1234",     "1234");
+}
+
+BOOST_AUTO_TEST_CASE(test_quoted_key)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_key, "\"127.0.0.1\"", "\"127.0.0.1\"");
+    TOML11_TEST_LEX_ACCEPT(lex_key, "\"character encoding\"", "\"character encoding\"");
+#if defined(_MSC_VER) || defined(__INTEL_COMPILER)
+    TOML11_TEST_LEX_ACCEPT(lex_key, "\"\xCA\x8E\xC7\x9D\xCA\x9E\"",
+                                    "\"\xCA\x8E\xC7\x9D\xCA\x9E\"");
+#else
+    TOML11_TEST_LEX_ACCEPT(lex_key, u8"\"ʎǝʞ\"", u8"\"ʎǝʞ\"");
+#endif
+    TOML11_TEST_LEX_ACCEPT(lex_key, "'key2'", "'key2'");
+    TOML11_TEST_LEX_ACCEPT(lex_key, "'quoted \"value\"'", "'quoted \"value\"'");
+}
+
+BOOST_AUTO_TEST_CASE(test_dotted_key)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_key, "physical.color", "physical.color");
+    TOML11_TEST_LEX_ACCEPT(lex_key, "physical.shape", "physical.shape");
+    TOML11_TEST_LEX_ACCEPT(lex_key, "x.y", "x.y");
+    TOML11_TEST_LEX_ACCEPT(lex_key, "x . y", "x . y");
+    TOML11_TEST_LEX_ACCEPT(lex_key, "x.y.z", "x.y.z");
+    TOML11_TEST_LEX_ACCEPT(lex_key, "x. y .z", "x. y .z");
+    TOML11_TEST_LEX_ACCEPT(lex_key, "x .y. z", "x .y. z");
+    TOML11_TEST_LEX_ACCEPT(lex_key, "x . y . z", "x . y . z");
+    TOML11_TEST_LEX_ACCEPT(lex_key, "x.y.z.w", "x.y.z.w");
+    TOML11_TEST_LEX_ACCEPT(lex_key, "x. y .z. w", "x. y .z. w");
+    TOML11_TEST_LEX_ACCEPT(lex_key, "x . y . z . w", "x . y . z . w");
+    TOML11_TEST_LEX_ACCEPT(lex_key, "site.\"google.com\"", "site.\"google.com\"");
+}
+
+BOOST_AUTO_TEST_CASE(test_comment)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_comment, "#   hoge", "#   hoge");
+    TOML11_TEST_LEX_ACCEPT(lex_comment, "#   \n",   "#   ");
+    TOML11_TEST_LEX_ACCEPT(lex_comment, "#   \r\n", "#   ");
+    TOML11_TEST_LEX_ACCEPT(lex_comment, "# # \n",   "# # ");
+}

tests/test_lex_string.cpp

@@ -0,0 +1,86 @@
+#define BOOST_TEST_MODULE "test_lex_string"
+#include <boost/test/unit_test.hpp>
+#include <toml/lexer.hpp>
+#include "test_lex_aux.hpp"
+
+using namespace toml;
+using namespace detail;
+
+BOOST_AUTO_TEST_CASE(test_string)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_string,
+            "\"The quick brown fox jumps over the lazy dog\"",
+            "\"The quick brown fox jumps over the lazy dog\"");
+    TOML11_TEST_LEX_ACCEPT(lex_string,
+            "\'The quick brown fox jumps over the lazy dog\'",
+            "\'The quick brown fox jumps over the lazy dog\'");
+    TOML11_TEST_LEX_ACCEPT(lex_ml_basic_string,
+            "\"\"\"The quick brown fox \\\njumps over the lazy dog\"\"\"",
+            "\"\"\"The quick brown fox \\\njumps over the lazy dog\"\"\"");
+    TOML11_TEST_LEX_ACCEPT(lex_ml_literal_string,
+            "'''The quick brown fox \njumps over the lazy dog'''",
+            "'''The quick brown fox \njumps over the lazy dog'''");
+}
+
+BOOST_AUTO_TEST_CASE(test_basic_string)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_string,
+            "\"GitHub Cofounder & CEO\\nLikes tater tots and beer.\"",
+            "\"GitHub Cofounder & CEO\\nLikes tater tots and beer.\"");
+    TOML11_TEST_LEX_ACCEPT(lex_string,
+            "\"192.168.1.1\"",
+            "\"192.168.1.1\"");
+
+#if defined(_MSC_VER) || defined(__INTEL_COMPILER)
+    TOML11_TEST_LEX_ACCEPT(lex_string,
+            "\"\xE4\xB8\xAD\xE5\x9B\xBD\"",
+            "\"\xE4\xB8\xAD\xE5\x9B\xBD\"");
+#else
+    TOML11_TEST_LEX_ACCEPT(lex_string,
+            u8"\"中国\"",
+            u8"\"中国\"");
+#endif
+
+    TOML11_TEST_LEX_ACCEPT(lex_string,
+            "\"You'll hate me after this - #\"",
+            "\"You'll hate me after this - #\"");
+    TOML11_TEST_LEX_ACCEPT(lex_string,
+            "\" And when \\\"'s are in the string, along with # \\\"\"",
+            "\" And when \\\"'s are in the string, along with # \\\"\"");
+}
+
+BOOST_AUTO_TEST_CASE(test_ml_basic_string)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_string,
+        "\"\"\"\nThe quick brown \\\n\n  fox jumps over \\\n  the lazy dog.\"\"\"",
+        "\"\"\"\nThe quick brown \\\n\n  fox jumps over \\\n  the lazy dog.\"\"\"");
+    TOML11_TEST_LEX_ACCEPT(lex_string,
+        "\"\"\"\\\n  The quick brown \\\n\n  fox jumps over \\\n  the lazy dog.\\\n  \"\"\"",
+        "\"\"\"\\\n  The quick brown \\\n\n  fox jumps over \\\n  the lazy dog.\\\n  \"\"\"");
+}
+
+BOOST_AUTO_TEST_CASE(test_literal_string)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_string,
+        "'C:\\Users\\nodejs\\templates'",
+        "'C:\\Users\\nodejs\\templates'");
+    TOML11_TEST_LEX_ACCEPT(lex_string,
+        "'\\\\ServerX\\admin$\\system32\\'",
+        "'\\\\ServerX\\admin$\\system32\\'");
+    TOML11_TEST_LEX_ACCEPT(lex_string,
+        "'Tom \"Dubs\" Preston-Werner'",
+        "'Tom \"Dubs\" Preston-Werner'");
+    TOML11_TEST_LEX_ACCEPT(lex_string,
+        "'<\\i\\c*\\s*>'",
+        "'<\\i\\c*\\s*>'");
+}
+
+BOOST_AUTO_TEST_CASE(test_ml_literal_string)
+{
+    TOML11_TEST_LEX_ACCEPT(lex_string,
+        "'''I [dw]on't need \\d{2} apples'''",
+        "'''I [dw]on't need \\d{2} apples'''");
+    TOML11_TEST_LEX_ACCEPT(lex_string,
+        "'''\nThe first newline is\ntrimmed in raw strings.\n   All other whitespace\n   is preserved.\n'''",
+        "'''\nThe first newline is\ntrimmed in raw strings.\n   All other whitespace\n   is preserved.\n'''");
+}

tests/test_parse_array.cpp

@@ -0,0 +1,130 @@
+#define BOOST_TEST_MODULE "parse_array_test"
+#ifdef UNITTEST_FRAMEWORK_LIBRARY_EXIST
+#include <boost/test/unit_test.hpp>
+#else
+#define BOOST_TEST_NO_LIB
+#include <boost/test/included/unit_test.hpp>
+#endif
+#include <toml/parser.hpp>
+#include "test_parse_aux.hpp"
+
+using namespace toml;
+using namespace detail;
+
+BOOST_AUTO_TEST_CASE(test_oneline_array)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_array, "[]", array());
+    {
+        array a(5);
+        a[0] = toml::value(3); a[1] = toml::value(1); a[2] = toml::value(4);
+        a[3] = toml::value(1); a[4] = toml::value(5);
+        TOML11_TEST_PARSE_EQUAL(parse_array, "[3,1,4,1,5]", a);
+    }
+    {
+        array a(3);
+        a[0] = toml::value("foo"); a[1] = toml::value("bar");
+        a[2] = toml::value("baz");
+        TOML11_TEST_PARSE_EQUAL(parse_array, "[\"foo\", \"bar\",  \"baz\"]", a);
+    }
+    {
+        array a(5);
+        a[0] = toml::value(3); a[1] = toml::value(1); a[2] = toml::value(4);
+        a[3] = toml::value(1); a[4] = toml::value(5);
+        TOML11_TEST_PARSE_EQUAL(parse_array, "[3,1,4,1,5,]", a);
+    }
+    {
+        array a(3);
+        a[0] = toml::value("foo"); a[1] = toml::value("bar");
+        a[2] = toml::value("baz");
+        TOML11_TEST_PARSE_EQUAL(parse_array, "[\"foo\", \"bar\",  \"baz\",]", a);
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_oneline_array_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "[]", toml::value(array()));
+    {
+        array a(5);
+        a[0] = toml::value(3); a[1] = toml::value(1); a[2] = toml::value(4);
+        a[3] = toml::value(1); a[4] = toml::value(5);
+        TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "[3,1,4,1,5]", toml::value(a));
+    }
+    {
+        array a(3);
+        a[0] = toml::value("foo"); a[1] = toml::value("bar");
+        a[2] = toml::value("baz");
+        TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "[\"foo\", \"bar\",  \"baz\"]", toml::value(a));
+    }
+    {
+        array a(5);
+        a[0] = toml::value(3); a[1] = toml::value(1); a[2] = toml::value(4);
+        a[3] = toml::value(1); a[4] = toml::value(5);
+        TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "[3,1,4,1,5,]", toml::value(a));
+    }
+    {
+        array a(3);
+        a[0] = toml::value("foo"); a[1] = toml::value("bar");
+        a[2] = toml::value("baz");
+        TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "[\"foo\", \"bar\",  \"baz\",]", toml::value(a));
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_multiline_array)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_array, "[\n#comment\n]", array());
+    {
+        array a(5);
+        a[0] = toml::value(3); a[1] = toml::value(1); a[2] = toml::value(4);
+        a[3] = toml::value(1); a[4] = toml::value(5);
+        TOML11_TEST_PARSE_EQUAL(parse_array, "[3,\n1,\n4,\n1,\n5]", a);
+    }
+    {
+        array a(3);
+        a[0] = toml::value("foo"); a[1] = toml::value("bar");
+        a[2] = toml::value("baz");
+        TOML11_TEST_PARSE_EQUAL(parse_array, "[\"foo\",\n\"bar\",\n\"baz\"]", a);
+    }
+
+    {
+        array a(5);
+        a[0] = toml::value(3); a[1] = toml::value(1); a[2] = toml::value(4);
+        a[3] = toml::value(1); a[4] = toml::value(5);
+        TOML11_TEST_PARSE_EQUAL(parse_array, "[3,#comment\n1,#comment\n4,#comment\n1,#comment\n5]", a);
+    }
+    {
+        array a(3);
+        a[0] = toml::value("foo"); a[1] = toml::value("b#r");
+        a[2] = toml::value("b#z");
+        TOML11_TEST_PARSE_EQUAL(parse_array, "[\"foo\",#comment\n\"b#r\",#comment\n\"b#z\"#comment\n]", a);
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_multiline_array_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "[\n#comment\n]", toml::value(array()));
+    {
+        array a(5);
+        a[0] = toml::value(3); a[1] = toml::value(1); a[2] = toml::value(4);
+        a[3] = toml::value(1); a[4] = toml::value(5);
+        TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "[3,\n1,\n4,\n1,\n5]", toml::value(a));
+    }
+    {
+        array a(3);
+        a[0] = toml::value("foo"); a[1] = toml::value("bar");
+        a[2] = toml::value("baz");
+        TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "[\"foo\",\n\"bar\",\n\"baz\"]", toml::value(a));
+    }
+
+    {
+        array a(5);
+        a[0] = toml::value(3); a[1] = toml::value(1); a[2] = toml::value(4);
+        a[3] = toml::value(1); a[4] = toml::value(5);
+        TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "[3,#comment\n1,#comment\n4,#comment\n1,#comment\n5]", toml::value(a));
+    }
+    {
+        array a(3);
+        a[0] = toml::value("foo"); a[1] = toml::value("b#r");
+        a[2] = toml::value("b#z");
+        TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "[\"foo\",#comment\n\"b#r\",#comment\n\"b#z\"#comment\n]", toml::value(a));
+    }
+}

tests/test_parse_aux.hpp

@@ -0,0 +1,38 @@
+#include <iostream>
+#include <iomanip>
+#include <algorithm>
+#include <toml/region.hpp>
+#include <toml/result.hpp>
+
+// some of the parsers returns not only a value but also a region.
+#define TOML11_TEST_PARSE_EQUAL(psr, tkn, expct)                               \
+do {                                                                           \
+    const std::string token(tkn);                                              \
+    toml::detail::location<std::string> loc("test", token);                    \
+    const auto result = psr(loc);                                              \
+    BOOST_CHECK(result.is_ok());                                               \
+    if(result.is_ok()){                                                        \
+    BOOST_CHECK(result.unwrap().first == expct);                               \
+    } else {                                                                   \
+    std::cerr << "parser " << #psr << " failed with input `";                  \
+    std::cerr << token << "`.\n";                                              \
+    std::cerr << "reason: " << result.unwrap_err() << '\n';                    \
+    }                                                                          \
+} while(false);                                                                \
+/**/
+
+#define TOML11_TEST_PARSE_EQUAL_VALUE(psr, tkn, expct)                         \
+do {                                                                           \
+    const std::string token(tkn);                                              \
+    toml::detail::location<std::string> loc("test", token);                    \
+    const auto result = psr(loc);                                              \
+    BOOST_CHECK(result.is_ok());                                               \
+    if(result.is_ok()){                                                        \
+    BOOST_CHECK(result.unwrap() == expct);                                     \
+    } else {                                                                   \
+    std::cerr << "parse_value failed with input `";                            \
+    std::cerr << token << "`.\n";                                              \
+    std::cerr << "reason: " << result.unwrap_err() << '\n';                    \
+    }                                                                          \
+} while(false);                                                                \
+/**/

tests/test_parse_boolean.cpp

@@ -0,0 +1,24 @@
+#define BOOST_TEST_MODULE "test_parse_boolean"
+#ifdef UNITTEST_FRAMEWORK_LIBRARY_EXIST
+#include <boost/test/unit_test.hpp>
+#else
+#define BOOST_TEST_NO_LIB
+#include <boost/test/included/unit_test.hpp>
+#endif
+#include <toml/parser.hpp>
+#include "test_parse_aux.hpp"
+
+using namespace toml;
+using namespace detail;
+
+BOOST_AUTO_TEST_CASE(test_boolean)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_boolean,  "true",  true);
+    TOML11_TEST_PARSE_EQUAL(parse_boolean, "false", false);
+}
+
+BOOST_AUTO_TEST_CASE(test_boolean_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value,  "true", toml::value( true));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "false", toml::value(false));
+}

tests/test_parse_datetime.cpp

@@ -0,0 +1,133 @@
+#define BOOST_TEST_MODULE "parse_datetime_test"
+#ifdef UNITTEST_FRAMEWORK_LIBRARY_EXIST
+#include <boost/test/unit_test.hpp>
+#else
+#define BOOST_TEST_NO_LIB
+#include <boost/test/included/unit_test.hpp>
+#endif
+#include <toml/parser.hpp>
+#include "test_parse_aux.hpp"
+
+using namespace toml;
+using namespace detail;
+
+BOOST_AUTO_TEST_CASE(test_time)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_local_time, "07:32:00",        toml::local_time(7, 32, 0));
+    TOML11_TEST_PARSE_EQUAL(parse_local_time, "07:32:00.99",     toml::local_time(7, 32, 0, 990, 0));
+    TOML11_TEST_PARSE_EQUAL(parse_local_time, "07:32:00.999",    toml::local_time(7, 32, 0, 999, 0));
+    TOML11_TEST_PARSE_EQUAL(parse_local_time, "07:32:00.999999", toml::local_time(7, 32, 0, 999, 999));
+}
+
+BOOST_AUTO_TEST_CASE(test_time_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "07:32:00",        toml::value(toml::local_time(7, 32, 0)));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "07:32:00.99",     toml::value(toml::local_time(7, 32, 0, 990, 0)));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "07:32:00.999",    toml::value(toml::local_time(7, 32, 0, 999, 0)));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "07:32:00.999999", toml::value(toml::local_time(7, 32, 0, 999, 999)));
+}
+
+BOOST_AUTO_TEST_CASE(test_date)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_local_date,  "1979-05-27",
+                            toml::local_date(1979, toml::month_t::May, 27));
+}
+BOOST_AUTO_TEST_CASE(test_date_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1979-05-27",
+                            value(toml::local_date(1979, toml::month_t::May, 27)));
+}
+
+BOOST_AUTO_TEST_CASE(test_datetime)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_local_datetime, "1979-05-27T07:32:00",
+        toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0)));
+    TOML11_TEST_PARSE_EQUAL(parse_local_datetime, "1979-05-27T07:32:00.99",
+        toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0, 990, 0)));
+    TOML11_TEST_PARSE_EQUAL(parse_local_datetime, "1979-05-27T07:32:00.999999",
+        toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0, 999, 999)));
+
+    TOML11_TEST_PARSE_EQUAL(parse_local_datetime, "1979-05-27t07:32:00",
+        toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0)));
+    TOML11_TEST_PARSE_EQUAL(parse_local_datetime, "1979-05-27t07:32:00.99",
+        toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0, 990, 0)));
+    TOML11_TEST_PARSE_EQUAL(parse_local_datetime, "1979-05-27t07:32:00.999999",
+        toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0, 999, 999)));
+
+    TOML11_TEST_PARSE_EQUAL(parse_local_datetime, "1979-05-27 07:32:00",
+        toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0)));
+    TOML11_TEST_PARSE_EQUAL(parse_local_datetime, "1979-05-27 07:32:00.99",
+        toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0, 990, 0)));
+    TOML11_TEST_PARSE_EQUAL(parse_local_datetime, "1979-05-27 07:32:00.999999",
+        toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0, 999, 999)));
+}
+
+BOOST_AUTO_TEST_CASE(test_datetime_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1979-05-27T07:32:00",
+        toml::value(toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0))));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1979-05-27T07:32:00.99",
+        toml::value(toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0, 990, 0))));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1979-05-27T07:32:00.999999",
+        toml::value(toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0, 999, 999))));
+
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1979-05-27t07:32:00",
+        toml::value(toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0))));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1979-05-27t07:32:00.99",
+        toml::value(toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0, 990, 0))));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1979-05-27t07:32:00.999999",
+        toml::value(toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0, 999, 999))));
+
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1979-05-27 07:32:00",
+        toml::value(toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0))));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1979-05-27 07:32:00.99",
+        toml::value(toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0, 990, 0))));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1979-05-27 07:32:00.999999",
+        toml::value(toml::local_datetime(toml::local_date(1979, toml::month_t::May, 27), toml::local_time(7, 32, 0, 999, 999))));
+}
+
+BOOST_AUTO_TEST_CASE(test_offset_datetime)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_offset_datetime, "1979-05-27T07:32:00Z",
+        toml::offset_datetime(toml::local_date(1979, toml::month_t::May, 27),
+                              toml::local_time(7, 32, 0), toml::time_offset(0, 0)));
+    TOML11_TEST_PARSE_EQUAL(parse_offset_datetime, "1979-05-27T07:32:00.99Z",
+        toml::offset_datetime(toml::local_date(1979, toml::month_t::May, 27),
+                              toml::local_time(7, 32, 0, 990, 0), toml::time_offset(0, 0)));
+    TOML11_TEST_PARSE_EQUAL(parse_offset_datetime, "1979-05-27T07:32:00.999999Z",
+        toml::offset_datetime(toml::local_date(1979, toml::month_t::May, 27),
+                              toml::local_time(7, 32, 0, 999, 999), toml::time_offset(0, 0)));
+
+    TOML11_TEST_PARSE_EQUAL(parse_offset_datetime, "1979-05-27T07:32:00+09:00",
+        toml::offset_datetime(toml::local_date(1979, toml::month_t::May, 27),
+                              toml::local_time(7, 32, 0), toml::time_offset(9, 0)));
+    TOML11_TEST_PARSE_EQUAL(parse_offset_datetime, "1979-05-27T07:32:00.99+09:00",
+        toml::offset_datetime(toml::local_date(1979, toml::month_t::May, 27),
+                              toml::local_time(7, 32, 0, 990, 0), toml::time_offset(9, 0)));
+    TOML11_TEST_PARSE_EQUAL(parse_offset_datetime, "1979-05-27T07:32:00.999999+09:00",
+        toml::offset_datetime(toml::local_date(1979, toml::month_t::May, 27),
+                              toml::local_time(7, 32, 0, 999, 999), toml::time_offset(9, 0)));
+}
+
+BOOST_AUTO_TEST_CASE(test_offset_datetime_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1979-05-27T07:32:00Z",
+        toml::value(toml::offset_datetime(toml::local_date(1979, toml::month_t::May, 27),
+                              toml::local_time(7, 32, 0), toml::time_offset(0, 0))));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1979-05-27T07:32:00.99Z",
+        toml::value(toml::offset_datetime(toml::local_date(1979, toml::month_t::May, 27),
+                              toml::local_time(7, 32, 0, 990, 0), toml::time_offset(0, 0))));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1979-05-27T07:32:00.999999Z",
+        toml::value(toml::offset_datetime(toml::local_date(1979, toml::month_t::May, 27),
+                              toml::local_time(7, 32, 0, 999, 999), toml::time_offset(0, 0))));
+
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1979-05-27T07:32:00+09:00",
+        toml::value(toml::offset_datetime(toml::local_date(1979, toml::month_t::May, 27),
+                              toml::local_time(7, 32, 0), toml::time_offset(9, 0))));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1979-05-27T07:32:00.99+09:00",
+        toml::value(toml::offset_datetime(toml::local_date(1979, toml::month_t::May, 27),
+                              toml::local_time(7, 32, 0, 990, 0), toml::time_offset(9, 0))));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1979-05-27T07:32:00.999999+09:00",
+        toml::value(toml::offset_datetime(toml::local_date(1979, toml::month_t::May, 27),
+                              toml::local_time(7, 32, 0, 999, 999), toml::time_offset(9, 0))));
+}

tests/test_parse_file.cpp

@@ -22,7 +22,8 @@ BOOST_AUTO_TEST_CASE(test_example)
         BOOST_CHECK_EQUAL(toml::get<std::string>(owner.at("bio")),
                           "GitHub Cofounder & CEO\nLikes tater tots and beer.");
         BOOST_CHECK_EQUAL(toml::get<toml::Datetime>(owner.at("dob")),
-                          toml::Datetime(1979, 5, 27, 7, 32, 0, 0, 0, 0, 0));
+                          toml::offset_datetime(toml::local_date(1979, toml::month_t::May, 27),
+                                                toml::local_time(7, 32, 0), toml::time_offset(0, 0)));
     }
 
     toml::Table database = toml::get<toml::Table>(data.at("database"));
@@ -90,7 +91,8 @@ BOOST_AUTO_TEST_CASE(test_example_stream)
         BOOST_CHECK_EQUAL(toml::get<std::string>(owner.at("bio")),
                           "GitHub Cofounder & CEO\nLikes tater tots and beer.");
         BOOST_CHECK_EQUAL(toml::get<toml::Datetime>(owner.at("dob")),
-                          toml::Datetime(1979, 5, 27, 7, 32, 0, 0, 0, 0, 0));
+                          toml::offset_datetime(toml::local_date(1979, toml::month_t::May, 27),
+                                                toml::local_time(7, 32, 0), toml::time_offset(0, 0)));
     }
 
     toml::Table database = toml::get<toml::Table>(data.at("database"));

tests/test_parse_floating.cpp

@@ -0,0 +1,158 @@
+#define BOOST_TEST_MODULE "parse_floating_test"
+#ifdef UNITTEST_FRAMEWORK_LIBRARY_EXIST
+#include <boost/test/unit_test.hpp>
+#else
+#define BOOST_TEST_NO_LIB
+#include <boost/test/included/unit_test.hpp>
+#endif
+#include <toml/parser.hpp>
+#include <cmath>
+#include "test_parse_aux.hpp"
+
+using namespace toml;
+using namespace detail;
+
+BOOST_AUTO_TEST_CASE(test_fractional)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "1.0",                1.0);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "0.1",                0.1);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "0.001",              0.001);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "0.100",              0.1);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "+3.14",              3.14);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "-3.14",             -3.14);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "3.1415_9265_3589",   3.141592653589);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "+3.1415_9265_3589",  3.141592653589);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "-3.1415_9265_3589", -3.141592653589);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "123_456.789",        123456.789);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "+123_456.789",       123456.789);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "-123_456.789",      -123456.789);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "+0.0",               0.0);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "-0.0",              -0.0);
+}
+
+BOOST_AUTO_TEST_CASE(test_fractional_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1.0",               value( 1.0));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0.1",               value( 0.1));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0.001",             value( 0.001));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0.100",             value( 0.1));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "+3.14",             value( 3.14));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "-3.14",             value(-3.14));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "3.1415_9265_3589",  value( 3.141592653589));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "+3.1415_9265_3589", value( 3.141592653589));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "-3.1415_9265_3589", value(-3.141592653589));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "123_456.789",       value( 123456.789));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "+123_456.789",      value( 123456.789));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "-123_456.789",      value(-123456.789));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "+0.0",              value( 0.0));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "-0.0",              value(-0.0));
+}
+
+BOOST_AUTO_TEST_CASE(test_exponential)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "1e10",       1e10);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "1e+10",      1e10);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "1e-10",      1e-10);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "+1e10",      1e10);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "+1e+10",     1e10);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "+1e-10",     1e-10);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "-1e10",      -1e10);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "-1e+10",     -1e10);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "-1e-10",     -1e-10);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "123e-10",    123e-10);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "1E10",       1e10);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "1E+10",      1e10);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "1E-10",      1e-10);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "123E-10",    123e-10);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "1_2_3E-10",  123e-10);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "1_2_3E-1_0", 123e-10);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "+0e0",        0.0);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "-0e0",       -0.0);
+}
+
+BOOST_AUTO_TEST_CASE(test_exponential_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1e10",       value(1e10));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1e+10",      value(1e10));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1e-10",      value(1e-10));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "+1e10",      value(1e10));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "+1e+10",     value(1e10));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "+1e-10",     value(1e-10));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "-1e10",      value(-1e10));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "-1e+10",     value(-1e10));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "-1e-10",     value(-1e-10));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "123e-10",    value(123e-10));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1E10",       value(1e10));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1E+10",      value(1e10));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1E-10",      value(1e-10));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "123E-10",    value(123e-10));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1_2_3E-10",  value(123e-10));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1_2_3E-1_0", value(123e-10));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "+0e0",       value( 0.0));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "-0e0",       value(-0.0));
+}
+BOOST_AUTO_TEST_CASE(test_fe)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "6.02e23",          6.02e23);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "6.02e+23",         6.02e23);
+    TOML11_TEST_PARSE_EQUAL(parse_floating, "1.112_650_06e-17", 1.11265006e-17);
+}
+BOOST_AUTO_TEST_CASE(test_fe_vaule)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "6.02e23",          value(6.02e23));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "6.02e+23",         value(6.02e23));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "1.112_650_06e-17", value(1.11265006e-17));
+}
+
+BOOST_AUTO_TEST_CASE(test_inf)
+{
+    {
+        const std::string token("inf");
+        toml::detail::location<std::string> loc("test", token);
+        const auto r = parse_floating(loc);
+        BOOST_CHECK(r.is_ok());
+        BOOST_CHECK(std::isinf(r.unwrap().first));
+        BOOST_CHECK(r.unwrap().first > 0.0);
+    }
+    {
+        const std::string token("+inf");
+        toml::detail::location<std::string> loc("test", token);
+        const auto r = parse_floating(loc);
+        BOOST_CHECK(r.is_ok());
+        BOOST_CHECK(std::isinf(r.unwrap().first));
+        BOOST_CHECK(r.unwrap().first > 0.0);
+    }
+    {
+        const std::string token("-inf");
+        toml::detail::location<std::string> loc("test", token);
+        const auto r = parse_floating(loc);
+        BOOST_CHECK(r.is_ok());
+        BOOST_CHECK(std::isinf(r.unwrap().first));
+        BOOST_CHECK(r.unwrap().first < 0.0);
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_nan)
+{
+    {
+        const std::string token("nan");
+        toml::detail::location<std::string> loc("test", token);
+        const auto r = parse_floating(loc);
+        BOOST_CHECK(r.is_ok());
+        BOOST_CHECK(std::isnan(r.unwrap().first));
+    }
+    {
+        const std::string token("+nan");
+        toml::detail::location<std::string> loc("test", token);
+        const auto r = parse_floating(loc);
+        BOOST_CHECK(r.is_ok());
+        BOOST_CHECK(std::isnan(r.unwrap().first));
+    }
+    {
+        const std::string token("-nan");
+        toml::detail::location<std::string> loc("test", token);
+        const auto r = parse_floating(loc);
+        BOOST_CHECK(r.is_ok());
+        BOOST_CHECK(std::isnan(r.unwrap().first));
+    }
+}

tests/test_parse_inline_table.cpp

@@ -0,0 +1,48 @@
+#define BOOST_TEST_MODULE "parse_inline_table_test"
+#ifdef UNITTEST_FRAMEWORK_LIBRARY_EXIST
+#include <boost/test/unit_test.hpp>
+#else
+#define BOOST_TEST_NO_LIB
+#include <boost/test/included/unit_test.hpp>
+#endif
+#include <toml/parser.hpp>
+#include "test_parse_aux.hpp"
+
+using namespace toml;
+using namespace detail;
+
+BOOST_AUTO_TEST_CASE(test_inline_table)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_inline_table, "{}", table());
+    {
+        table t;
+        t["foo"] = toml::value(42);
+        t["bar"] = toml::value("baz");
+        TOML11_TEST_PARSE_EQUAL(parse_inline_table, "{foo = 42, bar = \"baz\"}", t);
+    }
+    {
+        table t;
+        table t_sub;
+        t_sub["name"] = toml::value("pug");
+        t["type"] = toml::value(t_sub);
+        TOML11_TEST_PARSE_EQUAL(parse_inline_table, "{type.name = \"pug\"}", t);
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_inline_table_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "{}", value(table()));
+    {
+        table t;
+        t["foo"] = toml::value(42);
+        t["bar"] = toml::value("baz");
+        TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "{foo = 42, bar = \"baz\"}", value(t));
+    }
+    {
+        table t;
+        table t_sub;
+        t_sub["name"] = toml::value("pug");
+        t["type"] = toml::value(t_sub);
+        TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "{type.name = \"pug\"}", value(t));
+    }
+}

tests/test_parse_integer.cpp

@@ -0,0 +1,92 @@
+#define BOOST_TEST_MODULE "parse_integer_test"
+#ifdef UNITTEST_FRAMEWORK_LIBRARY_EXIST
+#include <boost/test/unit_test.hpp>
+#else
+#define BOOST_TEST_NO_LIB
+#include <boost/test/included/unit_test.hpp>
+#endif
+#include <toml/parser.hpp>
+#include "test_parse_aux.hpp"
+
+using namespace toml;
+using namespace detail;
+
+BOOST_AUTO_TEST_CASE(test_decimal)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_integer,        "1234",       1234);
+    TOML11_TEST_PARSE_EQUAL(parse_integer,       "+1234",       1234);
+    TOML11_TEST_PARSE_EQUAL(parse_integer,       "-1234",      -1234);
+    TOML11_TEST_PARSE_EQUAL(parse_integer,           "0",          0);
+    TOML11_TEST_PARSE_EQUAL(parse_integer,     "1_2_3_4",       1234);
+    TOML11_TEST_PARSE_EQUAL(parse_integer,    "+1_2_3_4",      +1234);
+    TOML11_TEST_PARSE_EQUAL(parse_integer,    "-1_2_3_4",      -1234);
+    TOML11_TEST_PARSE_EQUAL(parse_integer, "123_456_789",  123456789);
+}
+
+BOOST_AUTO_TEST_CASE(test_decimal_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value,        "1234", toml::value(     1234));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value,       "+1234", toml::value(     1234));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value,       "-1234", toml::value(    -1234));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value,           "0", toml::value(        0));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value,     "1_2_3_4", toml::value(     1234));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value,    "+1_2_3_4", toml::value(    +1234));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value,    "-1_2_3_4", toml::value(    -1234));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "123_456_789", toml::value(123456789));
+}
+
+BOOST_AUTO_TEST_CASE(test_hex)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_integer, "0xDEADBEEF",  0xDEADBEEF);
+    TOML11_TEST_PARSE_EQUAL(parse_integer, "0xdeadbeef",  0xDEADBEEF);
+    TOML11_TEST_PARSE_EQUAL(parse_integer, "0xDEADbeef",  0xDEADBEEF);
+    TOML11_TEST_PARSE_EQUAL(parse_integer, "0xDEAD_BEEF", 0xDEADBEEF);
+    TOML11_TEST_PARSE_EQUAL(parse_integer, "0xdead_beef", 0xDEADBEEF);
+    TOML11_TEST_PARSE_EQUAL(parse_integer, "0xdead_BEEF", 0xDEADBEEF);
+    TOML11_TEST_PARSE_EQUAL(parse_integer, "0xFF",        0xFF);
+    TOML11_TEST_PARSE_EQUAL(parse_integer, "0x00FF",      0xFF);
+    TOML11_TEST_PARSE_EQUAL(parse_integer, "0x0000FF",    0xFF);
+}
+
+BOOST_AUTO_TEST_CASE(test_hex_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0xDEADBEEF",  value(0xDEADBEEF));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0xdeadbeef",  value(0xDEADBEEF));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0xDEADbeef",  value(0xDEADBEEF));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0xDEAD_BEEF", value(0xDEADBEEF));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0xdead_beef", value(0xDEADBEEF));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0xdead_BEEF", value(0xDEADBEEF));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0xFF",        value(0xFF));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0x00FF",      value(0xFF));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0x0000FF",    value(0xFF));
+}
+
+BOOST_AUTO_TEST_CASE(test_oct)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_integer, "0o777",   64*7+8*7+7);
+    TOML11_TEST_PARSE_EQUAL(parse_integer, "0o7_7_7", 64*7+8*7+7);
+    TOML11_TEST_PARSE_EQUAL(parse_integer, "0o007",   7);
+}
+
+BOOST_AUTO_TEST_CASE(test_oct_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0o777",   value(64*7+8*7+7));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0o7_7_7", value(64*7+8*7+7));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0o007",   value(7));
+}
+
+BOOST_AUTO_TEST_CASE(test_bin)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_integer, "0b10000",    16);
+    TOML11_TEST_PARSE_EQUAL(parse_integer, "0b010000",   16);
+    TOML11_TEST_PARSE_EQUAL(parse_integer, "0b01_00_00", 16);
+    TOML11_TEST_PARSE_EQUAL(parse_integer, "0b111111",   63);
+}
+
+BOOST_AUTO_TEST_CASE(test_bin_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0b10000",    value(16));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0b010000",   value(16));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0b01_00_00", value(16));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, "0b111111",   value(63));
+}

tests/test_parse_key.cpp

@@ -0,0 +1,63 @@
+#define BOOST_TEST_MODULE "parse_key_test"
+#ifdef UNITTEST_FRAMEWORK_LIBRARY_EXIST
+#include <boost/test/unit_test.hpp>
+#else
+#define BOOST_TEST_NO_LIB
+#include <boost/test/included/unit_test.hpp>
+#endif
+#include <toml/parser.hpp>
+#include "test_parse_aux.hpp"
+
+using namespace toml;
+using namespace detail;
+
+BOOST_AUTO_TEST_CASE(test_bare_key)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_key, "barekey",  std::vector<key>(1, "barekey"));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_key, "bare-key", std::vector<key>(1, "bare-key"));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_key, "bare_key", std::vector<key>(1, "bare_key"));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_key, "1234",     std::vector<key>(1, "1234"));
+}
+
+BOOST_AUTO_TEST_CASE(test_quoted_key)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_key, "\"127.0.0.1\"",          std::vector<key>(1, "127.0.0.1"         ));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_key, "\"character encoding\"", std::vector<key>(1, "character encoding"));
+#if defined(_MSC_VER) || defined(__INTEL_COMPILER)
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_key, "\"\xCA\x8E\xC7\x9D\xCA\x9E\"", std::vector<key>(1, "\xCA\x8E\xC7\x9D\xCA\x9E"));
+#else
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_key, "\"ʎǝʞ\"",                std::vector<key>(1, "ʎǝʞ"               ));
+#endif
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_key, "'key2'",                 std::vector<key>(1, "key2"              ));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_key, "'quoted \"value\"'",     std::vector<key>(1, "quoted \"value\""  ));
+}
+
+BOOST_AUTO_TEST_CASE(test_dotted_key)
+{
+    {
+        std::vector<key> keys(2);
+        keys[0] = "physical";
+        keys[1] = "color";
+        TOML11_TEST_PARSE_EQUAL_VALUE(parse_key, "physical.color", keys);
+    }
+    {
+        std::vector<key> keys(2);
+        keys[0] = "physical";
+        keys[1] = "shape";
+        TOML11_TEST_PARSE_EQUAL_VALUE(parse_key, "physical.shape", keys);
+    }
+    {
+        std::vector<key> keys(4);
+        keys[0] = "x";
+        keys[1] = "y";
+        keys[2] = "z";
+        keys[3] = "w";
+        TOML11_TEST_PARSE_EQUAL_VALUE(parse_key, "x.y.z.w", keys);
+    }
+    {
+        std::vector<key> keys(2);
+        keys[0] = "site";
+        keys[1] = "google.com";
+        TOML11_TEST_PARSE_EQUAL_VALUE(parse_key, "site.\"google.com\"", keys);
+    }
+}

tests/test_parse_string.cpp

@@ -0,0 +1,188 @@
+#define BOOST_TEST_MODULE "parse_string_test"
+#ifdef UNITTEST_FRAMEWORK_LIBRARY_EXIST
+#include <boost/test/unit_test.hpp>
+#else
+#define BOOST_TEST_NO_LIB
+#include <boost/test/included/unit_test.hpp>
+#endif
+#include <toml/parser.hpp>
+#include "test_parse_aux.hpp"
+
+using namespace toml;
+using namespace detail;
+
+BOOST_AUTO_TEST_CASE(test_string)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "\"The quick brown fox jumps over the lazy dog\"",
+        string("The quick brown fox jumps over the lazy dog", string_t::basic));
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "\'The quick brown fox jumps over the lazy dog\'",
+        string("The quick brown fox jumps over the lazy dog", string_t::literal));
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "\"\"\"The quick brown fox \\\njumps over the lazy dog\"\"\"",
+        string("The quick brown fox jumps over the lazy dog", string_t::basic));
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "'''The quick brown fox \njumps over the lazy dog'''",
+        string("The quick brown fox \njumps over the lazy dog", string_t::literal));
+}
+
+BOOST_AUTO_TEST_CASE(test_string_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, 
+        "\"The quick brown fox jumps over the lazy dog\"",
+        toml::value("The quick brown fox jumps over the lazy dog", string_t::basic));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, 
+        "\'The quick brown fox jumps over the lazy dog\'",
+        toml::value("The quick brown fox jumps over the lazy dog", string_t::literal));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, 
+        "\"\"\"The quick brown fox \\\njumps over the lazy dog\"\"\"",
+        toml::value("The quick brown fox jumps over the lazy dog", string_t::basic));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, 
+        "'''The quick brown fox \njumps over the lazy dog'''",
+        toml::value("The quick brown fox \njumps over the lazy dog", string_t::literal));
+}
+
+
+BOOST_AUTO_TEST_CASE(test_basic_string)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "\"GitHub Cofounder & CEO\\nLikes tater tots and beer.\"",
+        string("GitHub Cofounder & CEO\nLikes tater tots and beer.", string_t::basic));
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "\"192.168.1.1\"",
+        string("192.168.1.1", string_t::basic));
+
+#if defined(_MSC_VER) || defined(__INTEL_COMPILER)
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "\"\xE4\xB8\xAD\xE5\x9B\xBD\"",
+        string("\xE4\xB8\xAD\xE5\x9B\xBD", string_t::basic));
+#else
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "\"中国\"",
+        string("中国", string_t::basic));
+#endif
+
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "\"You'll hate me after this - #\"",
+        string("You'll hate me after this - #", string_t::basic));
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "\" And when \\\"'s are in the along with # \\\"\"",
+        string(" And when \"'s are in the along with # \"", string_t::basic));
+}
+
+BOOST_AUTO_TEST_CASE(test_basic_string_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, 
+        "\"GitHub Cofounder & CEO\\nLikes tater tots and beer.\"",
+        value("GitHub Cofounder & CEO\nLikes tater tots and beer.", string_t::basic));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, 
+        "\"192.168.1.1\"",
+        value("192.168.1.1", string_t::basic));
+#if defined(_MSC_VER) || defined(__INTEL_COMPILER)
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value,
+        "\"\xE4\xB8\xAD\xE5\x9B\xBD\"",
+        value("\xE4\xB8\xAD\xE5\x9B\xBD", string_t::basic));
+#else
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, 
+        "\"中国\"",
+        value("中国", string_t::basic));
+#endif
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, 
+        "\"You'll hate me after this - #\"",
+        value("You'll hate me after this - #", string_t::basic));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, 
+        "\" And when \\\"'s are in the along with # \\\"\"",
+        value(" And when \"'s are in the along with # \"", string_t::basic));
+}
+
+BOOST_AUTO_TEST_CASE(test_ml_basic_string)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "\"\"\"\nThe quick brown \\\n\n  fox jumps over \\\n  the lazy dog.\"\"\"",
+        string("The quick brown fox jumps over the lazy dog.", string_t::basic));
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "\"\"\"\\\n  The quick brown \\\n\n  fox jumps over \\\n  the lazy dog.\\\n  \"\"\"",
+        string("The quick brown fox jumps over the lazy dog.", string_t::basic));
+}
+
+BOOST_AUTO_TEST_CASE(test_ml_basic_string_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, 
+        "\"\"\"\nThe quick brown \\\n\n  fox jumps over \\\n  the lazy dog.\"\"\"",
+        value("The quick brown fox jumps over the lazy dog.", string_t::basic));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, 
+        "\"\"\"\\\n  The quick brown \\\n\n  fox jumps over \\\n  the lazy dog.\\\n  \"\"\"",
+        value("The quick brown fox jumps over the lazy dog.", string_t::basic));
+}
+
+BOOST_AUTO_TEST_CASE(test_literal_string)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "'C:\\Users\\nodejs\\templates'",
+        string("C:\\Users\\nodejs\\templates", string_t::literal));
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "'\\\\ServerX\\admin$\\system32\\'",
+        string("\\\\ServerX\\admin$\\system32\\", string_t::literal));
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "'Tom \"Dubs\" Preston-Werner'",
+        string("Tom \"Dubs\" Preston-Werner", string_t::literal));
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "'<\\i\\c*\\s*>'",
+        string("<\\i\\c*\\s*>", string_t::literal));
+}
+
+BOOST_AUTO_TEST_CASE(test_literal_string_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, 
+        "'C:\\Users\\nodejs\\templates'",
+        value("C:\\Users\\nodejs\\templates", string_t::literal));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, 
+        "'\\\\ServerX\\admin$\\system32\\'",
+        value("\\\\ServerX\\admin$\\system32\\", string_t::literal));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, 
+        "'Tom \"Dubs\" Preston-Werner'",
+        value("Tom \"Dubs\" Preston-Werner", string_t::literal));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, 
+        "'<\\i\\c*\\s*>'",
+        value("<\\i\\c*\\s*>", string_t::literal));
+}
+
+BOOST_AUTO_TEST_CASE(test_ml_literal_string)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "'''I [dw]on't need \\d{2} apples'''",
+        string("I [dw]on't need \\d{2} apples", string_t::literal));
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+        "'''\nThe first newline is\ntrimmed in raw strings.\n   All other whitespace\n   is preserved.\n'''",
+        string("The first newline is\ntrimmed in raw strings.\n   All other whitespace\n   is preserved.\n", string_t::literal));
+}
+
+BOOST_AUTO_TEST_CASE(test_ml_literal_string_value)
+{
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, 
+        "'''I [dw]on't need \\d{2} apples'''",
+        value("I [dw]on't need \\d{2} apples", string_t::literal));
+    TOML11_TEST_PARSE_EQUAL_VALUE(parse_value, 
+        "'''\nThe first newline is\ntrimmed in raw strings.\n   All other whitespace\n   is preserved.\n'''",
+        value("The first newline is\ntrimmed in raw strings.\n   All other whitespace\n   is preserved.\n", string_t::literal));
+}
+
+BOOST_AUTO_TEST_CASE(test_unicode_escape_sequence)
+{
+#if defined(_MSC_VER) || defined(__INTEL_COMPILER)
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+            "\"\\u03B1\\u03B2\\u03B3\"",
+            string("\xCE\xB1\xCE\xB2\xCE\xB3", string_t::basic));
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+            "\"\\U0001D7AA\"",
+            string("\xF0\x9D\x9E\xAA", string_t::basic));
+#else
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+            "\"\\u03B1\\u03B2\\u03B3\"",
+            string("αβγ", string_t::basic));
+    TOML11_TEST_PARSE_EQUAL(parse_string,
+            "\"\\U0001D7AA\"",
+            string("𝞪", string_t::basic));
+#endif
+}

tests/test_parse_table.cpp

@@ -0,0 +1,50 @@
+#define BOOST_TEST_MODULE "parse_table_test"
+#ifdef UNITTEST_FRAMEWORK_LIBRARY_EXIST
+#include <boost/test/unit_test.hpp>
+#else
+#define BOOST_TEST_NO_LIB
+#include <boost/test/included/unit_test.hpp>
+#endif
+#include <toml/parser.hpp>
+#include <toml/get.hpp>
+#include "test_parse_aux.hpp"
+
+using namespace toml;
+using namespace detail;
+
+BOOST_AUTO_TEST_CASE(test_normal_table)
+{
+    std::string table(
+        "key1 = \"value\"\n"
+        "key2 = 42\n"
+        "key3 = 3.14\n"
+        );
+    location<std::string> loc("test", table);
+
+    const auto result = toml::detail::parse_ml_table(loc);
+    BOOST_CHECK(result.is_ok());
+    const auto data = result.unwrap();
+
+    BOOST_CHECK_EQUAL(toml::get<std::string >(data.at("key1")), "value");
+    BOOST_CHECK_EQUAL(toml::get<std::int64_t>(data.at("key2")), 42);
+    BOOST_CHECK_EQUAL(toml::get<double      >(data.at("key3")), 3.14);
+}
+
+BOOST_AUTO_TEST_CASE(test_nested_table)
+{
+    std::string table(
+        "a.b   = \"value\"\n"
+        "a.c.d = 42\n"
+        );
+    location<std::string> loc("test", table);
+
+    const auto result = toml::detail::parse_ml_table(loc);
+    BOOST_CHECK(result.is_ok());
+    const auto data = result.unwrap();
+
+    const auto a = toml::get<toml::table>(data.at("a"));
+    const auto c = toml::get<toml::table>(a.at("c"));
+
+    BOOST_CHECK_EQUAL(toml::get<std::string >(a.at("b")), "value");
+    BOOST_CHECK_EQUAL(toml::get<std::int64_t>(c.at("d")), 42);
+}

tests/test_parse_table_key.cpp

@@ -0,0 +1,117 @@
+#define BOOST_TEST_MODULE "parse_table_key_test"
+#ifdef UNITTEST_FRAMEWORK_LIBRARY_EXIST
+#include <boost/test/unit_test.hpp>
+#else
+#define BOOST_TEST_NO_LIB
+#include <boost/test/included/unit_test.hpp>
+#endif
+#include <toml/parser.hpp>
+#include "test_parse_aux.hpp"
+
+using namespace toml;
+using namespace detail;
+
+BOOST_AUTO_TEST_CASE(test_table_bare_key)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_table_key, "[barekey]",  std::vector<key>(1, "barekey"));
+    TOML11_TEST_PARSE_EQUAL(parse_table_key, "[bare-key]", std::vector<key>(1, "bare-key"));
+    TOML11_TEST_PARSE_EQUAL(parse_table_key, "[bare_key]", std::vector<key>(1, "bare_key"));
+    TOML11_TEST_PARSE_EQUAL(parse_table_key, "[1234]",     std::vector<key>(1, "1234"));
+}
+
+BOOST_AUTO_TEST_CASE(test_table_quoted_key)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_table_key, "[\"127.0.0.1\"]",          std::vector<key>(1, "127.0.0.1"         ));
+    TOML11_TEST_PARSE_EQUAL(parse_table_key, "[\"character encoding\"]", std::vector<key>(1, "character encoding"));
+    TOML11_TEST_PARSE_EQUAL(parse_table_key, "[\"ʎǝʞ\"]",                std::vector<key>(1, "ʎǝʞ"               ));
+    TOML11_TEST_PARSE_EQUAL(parse_table_key, "['key2']",                 std::vector<key>(1, "key2"              ));
+    TOML11_TEST_PARSE_EQUAL(parse_table_key, "['quoted \"value\"']",     std::vector<key>(1, "quoted \"value\""  ));
+}
+
+BOOST_AUTO_TEST_CASE(test_table_dotted_key)
+{
+    {
+        std::vector<key> keys(2);
+        keys[0] = "physical";
+        keys[1] = "color";
+        TOML11_TEST_PARSE_EQUAL(parse_table_key, "[physical.color]", keys);
+    }
+    {
+        std::vector<key> keys(2);
+        keys[0] = "physical";
+        keys[1] = "shape";
+        TOML11_TEST_PARSE_EQUAL(parse_table_key, "[physical.shape]", keys);
+    }
+    {
+        std::vector<key> keys(4);
+        keys[0] = "x";
+        keys[1] = "y";
+        keys[2] = "z";
+        keys[3] = "w";
+        TOML11_TEST_PARSE_EQUAL(parse_table_key, "[x.y.z.w]", keys);
+        TOML11_TEST_PARSE_EQUAL(parse_table_key, "[x . y . z . w]", keys);
+        TOML11_TEST_PARSE_EQUAL(parse_table_key, "[x. y .z. w]", keys);
+        TOML11_TEST_PARSE_EQUAL(parse_table_key, "[x .y. z .w]", keys);
+        TOML11_TEST_PARSE_EQUAL(parse_table_key, "[ x. y .z . w ]", keys);
+        TOML11_TEST_PARSE_EQUAL(parse_table_key, "[ x . y . z . w ]", keys);
+    }
+    {
+        std::vector<key> keys(2);
+        keys[0] = "site";
+        keys[1] = "google.com";
+        TOML11_TEST_PARSE_EQUAL(parse_table_key, "[site.\"google.com\"]", keys);
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_array_of_table_bare_key)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[[barekey]]",  std::vector<key>(1, "barekey"));
+    TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[[bare-key]]", std::vector<key>(1, "bare-key"));
+    TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[[bare_key]]", std::vector<key>(1, "bare_key"));
+    TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[[1234]]",     std::vector<key>(1, "1234"));
+}
+
+BOOST_AUTO_TEST_CASE(test_array_of_table_quoted_key)
+{
+    TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[[\"127.0.0.1\"]]",          std::vector<key>(1, "127.0.0.1"         ));
+    TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[[\"character encoding\"]]", std::vector<key>(1, "character encoding"));
+    TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[[\"ʎǝʞ\"]]",                std::vector<key>(1, "ʎǝʞ"               ));
+    TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[['key2']]",                 std::vector<key>(1, "key2"              ));
+    TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[['quoted \"value\"']]",     std::vector<key>(1, "quoted \"value\""  ));
+}
+
+BOOST_AUTO_TEST_CASE(test_array_of_table_dotted_key)
+{
+    {
+        std::vector<key> keys(2);
+        keys[0] = "physical";
+        keys[1] = "color";
+        TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[[physical.color]]", keys);
+    }
+    {
+        std::vector<key> keys(2);
+        keys[0] = "physical";
+        keys[1] = "shape";
+        TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[[physical.shape]]", keys);
+    }
+    {
+        std::vector<key> keys(4);
+        keys[0] = "x";
+        keys[1] = "y";
+        keys[2] = "z";
+        keys[3] = "w";
+        TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[[x.y.z.w]]", keys);
+        TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[[x . y . z . w]]", keys);
+        TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[[x. y .z. w]]", keys);
+        TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[[x .y. z .w]]", keys);
+        TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[[ x. y .z . w ]]", keys);
+        TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[[ x . y . z . w ]]", keys);
+
+    }
+    {
+        std::vector<key> keys(2);
+        keys[0] = "site";
+        keys[1] = "google.com";
+        TOML11_TEST_PARSE_EQUAL(parse_array_table_key, "[[site.\"google.com\"]]", keys);
+    }
+}

tests/test_parser.cpp

@@ -1,935 +0,0 @@
-#define BOOST_TEST_MODULE "test_parser"
-#ifdef UNITTEST_FRAMEWORK_LIBRARY_EXIST
-#include <boost/test/unit_test.hpp>
-#else
-#define BOOST_TEST_NO_LIB
-#include <boost/test/included/unit_test.hpp>
-#endif
-#include <toml/acceptor.hpp>
-#include <toml/parser.hpp>
-#include <toml/from_toml.hpp>
-#include <iostream>
-
-
-BOOST_AUTO_TEST_CASE(test_parse_basic_inline_string)
-{
-    typedef toml::parse_basic_inline_string parser;
-    typedef toml::is_basic_inline_string<toml::character> acceptor;
-    {
-        const std::string source("\"simple\"");
-        const std::string expected("simple");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("\"I'm a string. \\\"You can quote me\\\". Name\\tJos\\u00E9\\nLocation\\tSF.\"");
-        const std::string expected("I'm a string. \"You can quote me\". Name\tJosé\nLocation\tSF.");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("dummy");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(!result.first.ok());
-        BOOST_CHECK(result.second == source.begin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_parse_basic_multiline_string)
-{
-    typedef toml::parse_basic_multiline_string parser;
-    typedef toml::is_basic_multiline_string<toml::character> acceptor;
-    {
-        //XXX ifdef windows platform
-        const std::string source("\"\"\"\nRoses are red\nViolets are blue\"\"\"");
-        const std::string expected("Roses are red\nViolets are blue");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("\"\"\"\nThe quick brown \\\n\n  fox jumps over \\\n    the lazy dog.\"\"\"");
-        const std::string expected("The quick brown fox jumps over the lazy dog.");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("\"\"\"\nThe quick brown \\\n    fox jumps over \\\n    the lazy dog.\\\n    \"\"\"");
-        const std::string expected("The quick brown fox jumps over the lazy dog.");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("dummy");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(!result.first.ok());
-        BOOST_CHECK(result.second == source.begin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_parse_literal_inline_string)
-{
-    typedef toml::parse_literal_inline_string parser;
-    typedef toml::is_literal_inline_string<toml::character> acceptor;
-    {
-        const std::string source("'C:\\Users\\nodejs\\templates'");
-        const std::string expected("C:\\Users\\nodejs\\templates");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("'\\\\ServerX\\admin$\\system32\\'");
-        const std::string expected("\\\\ServerX\\admin$\\system32\\");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("'Tom \"Dubs\" Preston-Werner'");
-        const std::string expected("Tom \"Dubs\" Preston-Werner");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("'<\\i\\c*\\s*>'");
-        const std::string expected("<\\i\\c*\\s*>");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("dummy");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(!result.first.ok());
-        BOOST_CHECK(result.second == source.begin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_parse_literal_multiline_string)
-{
-    typedef toml::parse_literal_multiline_string parser;
-    typedef toml::is_literal_multiline_string<toml::character> acceptor;
-    {
-        const std::string source("'''I [dw]on't need \\d{2} apples'''");
-        const std::string expected("I [dw]on't need \\d{2} apples");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("'''\nThe first newline is \ntrimmed in raw strings.\n    All other whitespace\n    is preserved.'''");
-        const std::string expected("The first newline is \ntrimmed in raw strings.\n    All other whitespace\n    is preserved.");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("dummy");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(!result.first.ok());
-        BOOST_CHECK(result.second == source.begin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_parse_string)
-{
-    typedef toml::parse_string parser;
-    typedef toml::is_string<toml::character> acceptor;
-    {
-        const std::string source("\"string\"");
-        const std::string expected("string");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("\"\"\"string\"\"\"");
-        const std::string expected("string");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("'string'");
-        const std::string expected("string");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("'''string'''");
-        const std::string expected("string");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("dummy");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(!result.first.ok());
-        BOOST_CHECK(result.second == source.begin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_integer)
-{
-    typedef toml::parse_integer parser;
-    typedef toml::is_integer<toml::character> acceptor;
-    {
-        const std::string   source("42");
-        const toml::Integer expected(42);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string   source("+42");
-        const toml::Integer expected(42);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string   source("-42");
-        const toml::Integer expected(-42);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string   source("-4_2");
-        const toml::Integer expected(-42);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("dummy");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(!result.first.ok());
-        BOOST_CHECK(result.second == source.begin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_float)
-{
-    typedef toml::parse_float parser;
-    typedef toml::is_float<toml::character> acceptor;
-    {
-        const std::string source("42.0");
-        const toml::Float expected(42.0);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("+42.0");
-        const toml::Float expected(42.0);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("-42.0");
-        const toml::Float expected(-42.0);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("-4_2.0");
-        const toml::Float expected(-42.0);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("-42e0");
-        const toml::Float expected(-42.0);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("-42.0e0");
-        const toml::Float expected(-42.0);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("dummy");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(!result.first.ok());
-        BOOST_CHECK(result.second == source.begin());
-    }
-    {
-        const std::string source("42");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(!result.first.ok());
-        BOOST_CHECK(result.second == source.begin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_parse_boolean)
-{
-    typedef toml::parse_boolean parser;
-    typedef toml::is_boolean<toml::character> acceptor;
-    {
-        const std::string   source("true");
-        const toml::Boolean expected(true);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string   source("false");
-        const toml::Boolean expected(false);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string   source("dummy");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(!result.first.ok());
-        BOOST_CHECK(result.second == source.begin());
-    }
-}
-
-
-
-BOOST_AUTO_TEST_CASE(test_parse_local_time)
-{
-    typedef toml::parse_local_time parser;
-    typedef toml::is_local_time<toml::character> acceptor;
-    {
-        const std::string source("12:34:56");
-        const toml::Datetime expected(12, 34, 56, 0, 0);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("12:34:56.7");
-        const toml::Datetime expected(12, 34, 56, 700, 0);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("12:34:56.7891");
-        const toml::Datetime expected(12, 34, 56, 789, 100);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("10");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(!result.first.ok());
-        BOOST_CHECK(result.second == source.begin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_parse_local_date)
-{
-    typedef toml::parse_local_date parser;
-    typedef toml::is_local_date<toml::character>  acceptor;
-    {
-        const std::string source("1979-09-27");
-        const toml::Datetime expected(1979, 9, 27);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("10");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(!result.first.ok());
-        BOOST_CHECK(result.second == source.begin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_parse_local_date_time)
-{
-    typedef toml::parse_local_date_time parser;
-    typedef toml::is_local_date_time<toml::character> acceptor;
-    {
-        const std::string source("1979-09-27T12:34:56");
-        const toml::Datetime expected(1979, 9, 27, 12, 34, 56, 0, 0);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("1979-09-27T12:34:56.789000");
-        const toml::Datetime expected(1979, 9, 27, 12, 34, 56, 789, 0);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("1000-11-11");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(!result.first.ok());
-        BOOST_CHECK(result.second == source.begin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_parse_offset_date_time)
-{
-    typedef toml::parse_offset_date_time parser;
-    typedef toml::is_offset_date_time<toml::character> acceptor;
-    {
-        const std::string source("1979-09-27T12:34:56Z");
-        const toml::Datetime expected(1979, 9, 27, 12, 34, 56, 0, 0, 0, 0);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("1979-09-27T12:34:56.789000Z");
-        const toml::Datetime expected(1979, 9, 27, 12, 34, 56, 789, 0, 0, 0);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-
-    {
-        const std::string source("1979-09-27T12:34:56+07:30");
-        const toml::Datetime expected(1979, 9, 27, 12, 34, 56, 0, 0, 7, 30);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("1979-09-27T12:34:56.789000+07:30");
-        const toml::Datetime expected(1979, 9, 27, 12, 34, 56, 789, 0, 7, 30);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-
-    {
-        const std::string source("1979-09-27T12:34:56-07:30");
-        const toml::Datetime expected(1979, 9, 27, 12, 34, 56, 0, 0, -7, -30);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("1979-09-27T12:34:56.789000-07:30");
-        const toml::Datetime expected(1979, 9, 27, 12, 34, 56, 789, 0, -7, -30);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("1000-11-11");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(!result.first.ok());
-        BOOST_CHECK(result.second == source.begin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_parse_datetime)
-{
-    typedef toml::parse_datetime parser;
-    typedef toml::is_datetime<toml::character> acceptor;
-    {
-        const std::string source("1979-09-27T12:34:56Z");
-        const toml::Datetime expected(1979, 9, 27, 12, 34, 56, 0, 0, 0, 0);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("1979-09-27T12:34:56");
-        const toml::Datetime expected(1979, 9, 27, 12, 34, 56, 0, 0);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("1979-09-27");
-        const toml::Datetime expected(1979, 9, 27);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("12:34:56");
-        const toml::Datetime expected(12, 34, 56, 0, 0);
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK_EQUAL(result.first.get(), expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("12");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(!result.first.ok());
-        BOOST_CHECK(result.second == source.begin());
-    }
-}
-
-
-BOOST_AUTO_TEST_CASE(test_parse_array)
-{
-    typedef toml::parse_array<toml::character> parser;
-    typedef toml::is_array<toml::character>  acceptor;
-    {
-        const std::string source("[1,2,3]");
-        const toml::Array expected{1, 2, 3};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("[1, 2, 3]");
-        const toml::Array expected{1, 2, 3};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("[ 1,2,3 ]");
-        const toml::Array expected{1, 2, 3};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("[ 1 , 2 , 3 ]");
-        const toml::Array expected{1, 2, 3};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("[ 1 \n,#comment\n 2 ,\n 3\n ]");
-        const toml::Array expected{1, 2, 3};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("[ # empty array\n ]");
-        const toml::Array expected{};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("[ \"] \", ' # ', \n']', # ] \n]");
-        const toml::Array expected{"] ", " # ", "]"};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-
-    {
-        const std::string source("[ \"Test #11 ]proved that\", 'Experiment #9 was a success' ]");
-        const toml::Array expected{"Test #11 ]proved that", "Experiment #9 was a success"};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-
-    {
-        const std::string source("[ \"Test #11 ]proved that\", 'Experiment #9 was a success' ]");
-        const toml::Array expected{"Test #11 ]proved that", "Experiment #9 was a success"};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-
-    {
-        const std::string source("[ [1,2,3] , ['a', 'b', 'c'] ]");
-        const toml::Array expected{{1,2,3}, {"a", "b", "c"}};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-
-    {
-        const std::string source("[ {foo=1}, {foo=1, bar=2.0}, {foo=1, bar=2.0, baz='str'} ]");
-        const toml::Array expected{{{"foo", 1}}, {{"foo", 1}, {"bar", 2.0}}, {{"foo", 1}, {"bar", 2.0}, {"baz", "str"}}};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("[dummy]");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(!result.first.ok());
-        BOOST_CHECK(result.second == source.begin());
-    }
-}
-
-
-BOOST_AUTO_TEST_CASE(test_parse_inline_table)
-{
-    typedef toml::parse_inline_table<toml::character> parser;
-    typedef toml::is_inline_table<toml::character>  acceptor;
-    {
-        const std::string source("{foo=1,bar=2.0,baz='str'}");
-        const toml::Table expected{{"foo", 1}, {"bar", 2.0}, {"baz", "str"}};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("{ foo=1, bar=2.0, baz='str' }");
-        const toml::Table expected{{"foo", 1}, {"bar", 2.0}, {"baz", "str"}};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("{ foo = 1, bar = 2.0, baz = 'str' }");
-        const toml::Table expected{{"foo", 1}, {"bar", 2.0}, {"baz", "str"}};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-
-    {
-        const std::string source("{b=true, i=1, f=2.0, d=1907-03-02T07:32:00, s='str', a=[1,2,3], t={foo=1}}");
-        const toml::Table expected{{"b", true}, {"i", 1}, {"f", 2.0},
-                                   {"d", toml::Datetime(1907,3,2,7,32,0,0,0)},
-                                   {"s", "str"}, {"a", {1, 2, 3}},
-                                   {"t", {{"foo", 1}}}};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("{dummy}");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(!result.first.ok());
-        BOOST_CHECK(result.second == source.begin());
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_parse_barekey)
-{
-    typedef toml::parse_barekey parser;
-    typedef toml::is_barekey<toml::character> acceptor;
-    {
-        const std::string source("hoge");
-        const toml::key expected("hoge");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("bare-key");
-        const toml::key expected("bare-key");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("bare_key");
-        const toml::key expected("bare_key");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("42");
-        const toml::key expected("42");
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-}
-
-
-
-BOOST_AUTO_TEST_CASE(test_key_value_pair)
-{
-    typedef toml::parse_key_value_pair<char> parser;
-    typedef toml::is_key_value_pair<char>  acceptor;
-    {
-        const std::string source("key=1");
-        const std::pair<toml::key, toml::value> expected{"key", 1};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("key =\t1");
-        const std::pair<toml::key, toml::value> expected{"key", 1};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("key = true");
-        const std::pair<toml::key, toml::value> expected{"key", true};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("key = -42");
-        const std::pair<toml::key, toml::value> expected{"key", -42};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("key = -42.0");
-        const std::pair<toml::key, toml::value> expected{"key", -42.};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("key = \"string\"");
-        const std::pair<toml::key, toml::value> expected{"key", "string"};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("key = 1901-01-01T00:00:00");
-        const std::pair<toml::key, toml::value> expected{"key", toml::Datetime(1901, 1,1,0,0,0,0,0)};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("key = [1,2,3]");
-        const std::pair<toml::key, toml::value> expected{"key", {1,2,3}};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("key = {foo=1,bar=2.0,baz='3'}");
-        const std::pair<toml::key, toml::value> expected{"key",
-            {{"foo", 1}, {"bar", 2.0}, {"baz", "3"}}};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_table_definition)
-{
-    typedef toml::parse_table_definition parser;
-    typedef toml::is_table_definition<char>  acceptor;
-    {
-        const std::string source("[foo]");
-        const std::vector<toml::key> expected{"foo"};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("[foo.bar.baz]");
-        const std::vector<toml::key> expected{"foo", "bar", "baz"};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("[foo . bar. baz]");
-        const std::vector<toml::key> expected{"foo", "bar", "baz"};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("[foo . \"bar\" . baz]");
-        const std::vector<toml::key> expected{"foo", "bar", "baz"};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("[foo . \"b\\tar\" . baz]");
-        const std::vector<toml::key> expected{"foo", "b\tar", "baz"};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_array_of_table_definition)
-{
-    typedef toml::parse_array_of_table_definition parser;
-    typedef toml::is_array_of_table_definition<char>  acceptor;
-    {
-        const std::string source("[[foo]]");
-        const std::vector<toml::key> expected{"foo"};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("[[foo.bar.baz]]");
-        const std::vector<toml::key> expected{"foo", "bar", "baz"};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("[[foo . bar. baz]]");
-        const std::vector<toml::key> expected{"foo", "bar", "baz"};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("[[foo . \"bar\" . baz]]");
-        const std::vector<toml::key> expected{"foo", "bar", "baz"};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-    {
-        const std::string source("[[foo . \"b\\tar\" . baz]]");
-        const std::vector<toml::key> expected{"foo", "b\tar", "baz"};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result.first.ok());
-        BOOST_CHECK(result.first.get() == expected);
-        BOOST_CHECK(result.second == acceptor::invoke(source.begin(), source.end()));
-    }
-}
-
-BOOST_AUTO_TEST_CASE(test_parse_data)
-{
-    typedef toml::parse_data parser;
-    {
-        const std::string source("#hogehoge");
-        const toml::Table expected{};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result == expected);
-    }
-    {
-        const std::string source("key = 'value'");
-        const toml::Table expected{{"key", "value"}};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result == expected);
-    }
-    {
-        const std::string source("key = 'value' #hoge");
-        const toml::Table expected{{"key", "value"}};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result == expected);
-    }
-    {
-        const std::string source("[table]\nkey = 'value' #hoge");
-        const toml::Table expected{{"table", {{"key", "value"}} }};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result == expected);
-    }
-    {
-        const std::string source("[table]\n\tkey = 'value'\n\t#hoge");
-        const toml::Table expected{{"table", {{"key", "value"}} }};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result == expected);
-    }
-    {
-        const std::string source("[table]\n\tkey = 'value'\n\t#hoge");
-        const toml::Table expected{{"table", {{"key", "value"}} }};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result == expected);
-    }
-    {
-        const std::string source("[nested.table]\n\tkey = 'value'\n\t#hoge");
-        const toml::Table expected{{"nested", {{"table", {{"key", "value"}}}}}};
-        const auto result = parser::invoke(source.cbegin(), source.cend());
-        BOOST_CHECK(result == expected);
-    }
-}

tests/test_result.cpp

@@ -0,0 +1,411 @@
+#define BOOST_TEST_MODULE "test_result"
+#include <boost/test/unit_test.hpp>
+#include <iostream>
+#include <toml/result.hpp>
+
+BOOST_AUTO_TEST_CASE(test_construct)
+{
+    {
+        auto s = toml::ok(42);
+        toml::result<int, std::string> result(s);
+        BOOST_CHECK(!!result);
+        BOOST_CHECK(result.is_ok());
+        BOOST_CHECK(!result.is_err());
+        BOOST_CHECK_EQUAL(result.unwrap(), 42);
+    }
+    {
+        const auto s = toml::ok(42);
+        toml::result<int, std::string> result(s);
+        BOOST_CHECK(!!result);
+        BOOST_CHECK(result.is_ok());
+        BOOST_CHECK(!result.is_err());
+        BOOST_CHECK_EQUAL(result.unwrap(), 42);
+    }
+    {
+        toml::result<int, std::string> result(toml::ok(42));
+        BOOST_CHECK(!!result);
+        BOOST_CHECK(result.is_ok());
+        BOOST_CHECK(!result.is_err());
+        BOOST_CHECK_EQUAL(result.unwrap(), 42);
+    }
+
+    {
+        auto f = toml::err<std::string>("foobar");
+        toml::result<int, std::string> result(f);
+        BOOST_CHECK(!result);
+        BOOST_CHECK(!result.is_ok());
+        BOOST_CHECK(result.is_err());
+        BOOST_CHECK_EQUAL(result.unwrap_err(), "foobar");
+    }
+    {
+        const auto f = toml::err<std::string>("foobar");
+        toml::result<int, std::string> result(f);
+        BOOST_CHECK(!result);
+        BOOST_CHECK(!result.is_ok());
+        BOOST_CHECK(result.is_err());
+        BOOST_CHECK_EQUAL(result.unwrap_err(), "foobar");
+    }
+    {
+        toml::result<int, std::string> result(toml::err<std::string>("foobar"));
+        BOOST_CHECK(!result);
+        BOOST_CHECK(!result.is_ok());
+        BOOST_CHECK(result.is_err());
+        BOOST_CHECK_EQUAL(result.unwrap_err(), "foobar");
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_assignment)
+{
+    {
+        toml::result<int, std::string> result(toml::err<std::string>("foobar"));
+        result = toml::ok(42);
+        BOOST_CHECK(!!result);
+        BOOST_CHECK(result.is_ok());
+        BOOST_CHECK(!result.is_err());
+        BOOST_CHECK_EQUAL(result.unwrap(), 42);
+    }
+    {
+        toml::result<int, std::string> result(toml::err<std::string>("foobar"));
+        auto s = toml::ok(42);
+        result = s;
+        BOOST_CHECK(!!result);
+        BOOST_CHECK(result.is_ok());
+        BOOST_CHECK(!result.is_err());
+        BOOST_CHECK_EQUAL(result.unwrap(), 42);
+    }
+    {
+        toml::result<int, std::string> result(toml::err<std::string>("foobar"));
+        const auto s = toml::ok(42);
+        result = s;
+        BOOST_CHECK(!!result);
+        BOOST_CHECK(result.is_ok());
+        BOOST_CHECK(!result.is_err());
+        BOOST_CHECK_EQUAL(result.unwrap(), 42);
+    }
+    {
+        toml::result<int, std::string> result(toml::err<std::string>("foobar"));
+        result = toml::err<std::string>("hoge");
+        BOOST_CHECK(!result);
+        BOOST_CHECK(!result.is_ok());
+        BOOST_CHECK(result.is_err());
+        BOOST_CHECK_EQUAL(result.unwrap_err(), "hoge");
+    }
+    {
+        toml::result<int, std::string> result(toml::err<std::string>("foobar"));
+        auto f = toml::err<std::string>("hoge");
+        result = f;
+        BOOST_CHECK(!result);
+        BOOST_CHECK(!result.is_ok());
+        BOOST_CHECK(result.is_err());
+        BOOST_CHECK_EQUAL(result.unwrap_err(), "hoge");
+    }
+    {
+        toml::result<int, std::string> result(toml::err<std::string>("foobar"));
+        const auto f = toml::err<std::string>("hoge");
+        result = f;
+        BOOST_CHECK(!result);
+        BOOST_CHECK(!result.is_ok());
+        BOOST_CHECK(result.is_err());
+        BOOST_CHECK_EQUAL(result.unwrap_err(), "hoge");
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_map)
+{
+    {
+        const toml::result<int, std::string> result(toml::ok(42));
+        const auto mapped = result.map(
+                [](const int i) -> int {
+                    return i * 2;
+                });
+
+        BOOST_CHECK(!!mapped);
+        BOOST_CHECK(mapped.is_ok());
+        BOOST_CHECK(!mapped.is_err());
+        BOOST_CHECK_EQUAL(mapped.unwrap(), 42 * 2);
+    }
+    {
+        toml::result<std::unique_ptr<int>, std::string>
+            result(toml::ok(std::unique_ptr<int>(new int(42))));
+        const auto mapped = std::move(result).map(
+                [](std::unique_ptr<int> i) -> int {
+                    return *i;
+                });
+
+        BOOST_CHECK(!!mapped);
+        BOOST_CHECK(mapped.is_ok());
+        BOOST_CHECK(!mapped.is_err());
+        BOOST_CHECK_EQUAL(mapped.unwrap(), 42);
+    }
+    {
+        const toml::result<int, std::string> result(toml::err<std::string>("hoge"));
+        const auto mapped = result.map(
+                [](const int i) -> int {
+                    return i * 2;
+                });
+
+        BOOST_CHECK(!mapped);
+        BOOST_CHECK(!mapped.is_ok());
+        BOOST_CHECK(mapped.is_err());
+        BOOST_CHECK_EQUAL(mapped.unwrap_err(), "hoge");
+    }
+    {
+        toml::result<std::unique_ptr<int>, std::string>
+            result(toml::err<std::string>("hoge"));
+        const auto mapped = std::move(result).map(
+                [](std::unique_ptr<int> i) -> int {
+                    return *i;
+                });
+
+        BOOST_CHECK(!mapped);
+        BOOST_CHECK(!mapped.is_ok());
+        BOOST_CHECK(mapped.is_err());
+        BOOST_CHECK_EQUAL(mapped.unwrap_err(), "hoge");
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_map_err)
+{
+    {
+        const toml::result<int, std::string> result(toml::ok(42));
+        const auto mapped = result.map_err(
+                [](const std::string s) -> std::string {
+                    return s + s;
+                });
+
+        BOOST_CHECK(!!mapped);
+        BOOST_CHECK(mapped.is_ok());
+        BOOST_CHECK(!mapped.is_err());
+        BOOST_CHECK_EQUAL(mapped.unwrap(), 42);
+    }
+    {
+        toml::result<std::unique_ptr<int>, std::string>
+            result(toml::ok(std::unique_ptr<int>(new int(42))));
+        const auto mapped = std::move(result).map_err(
+                [](const std::string s) -> std::string {
+                    return s + s;
+                });
+
+        BOOST_CHECK(!!mapped);
+        BOOST_CHECK(mapped.is_ok());
+        BOOST_CHECK(!mapped.is_err());
+        BOOST_CHECK_EQUAL(*(mapped.unwrap()), 42);
+    }
+    {
+        const toml::result<int, std::string> result(toml::err<std::string>("hoge"));
+        const auto mapped = result.map_err(
+                [](const std::string s) -> std::string {
+                    return s + s;
+                });
+        BOOST_CHECK(!mapped);
+        BOOST_CHECK(!mapped.is_ok());
+        BOOST_CHECK(mapped.is_err());
+        BOOST_CHECK_EQUAL(mapped.unwrap_err(), "hogehoge");
+    }
+    {
+        toml::result<int, std::unique_ptr<std::string>>
+            result(toml::err(std::unique_ptr<std::string>(new std::string("hoge"))));
+        const auto mapped = std::move(result).map_err(
+                [](std::unique_ptr<std::string> p) -> std::string {
+                    return *p;
+                });
+
+        BOOST_CHECK(!mapped);
+        BOOST_CHECK(!mapped.is_ok());
+        BOOST_CHECK(mapped.is_err());
+        BOOST_CHECK_EQUAL(mapped.unwrap_err(), "hoge");
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_map_or_else)
+{
+    {
+        const toml::result<int, std::string> result(toml::ok(42));
+        const auto mapped = result.map_or_else(
+                [](const int i) -> int {
+                    return i * 2;
+                }, 54);
+
+        BOOST_CHECK_EQUAL(mapped, 42 * 2);
+    }
+    {
+        toml::result<std::unique_ptr<int>, std::string>
+            result(toml::ok(std::unique_ptr<int>(new int(42))));
+        const auto mapped = std::move(result).map_or_else(
+                [](std::unique_ptr<int> i) -> int {
+                    return *i;
+                }, 54);
+
+        BOOST_CHECK_EQUAL(mapped, 42);
+    }
+    {
+        const toml::result<int, std::string> result(toml::err<std::string>("hoge"));
+        const auto mapped = result.map_or_else(
+                [](const int i) -> int {
+                    return i * 2;
+                }, 54);
+
+        BOOST_CHECK_EQUAL(mapped, 54);
+    }
+    {
+        toml::result<std::unique_ptr<int>, std::string>
+            result(toml::err<std::string>("hoge"));
+        const auto mapped = std::move(result).map_or_else(
+                [](std::unique_ptr<int> i) -> int {
+                    return *i;
+                }, 54);
+
+        BOOST_CHECK_EQUAL(mapped, 54);
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_map_err_or_else)
+{
+    {
+        const toml::result<int, std::string> result(toml::ok(42));
+        const auto mapped = result.map_err_or_else(
+                [](const std::string i) -> std::string {
+                    return i + i;
+                }, "foobar");
+
+        BOOST_CHECK_EQUAL(mapped, "foobar");
+    }
+    {
+        toml::result<std::unique_ptr<int>, std::string>
+            result(toml::ok(std::unique_ptr<int>(new int(42))));
+        const auto mapped = std::move(result).map_err_or_else(
+                [](const std::string i) -> std::string {
+                    return i + i;
+                }, "foobar");
+
+        BOOST_CHECK_EQUAL(mapped, "foobar");
+    }
+    {
+        const toml::result<int, std::string> result(toml::err<std::string>("hoge"));
+        const auto mapped = result.map_err_or_else(
+                [](const std::string i) -> std::string {
+                    return i + i;
+                }, "foobar");
+
+        BOOST_CHECK_EQUAL(mapped, "hogehoge");
+    }
+    {
+        toml::result<std::unique_ptr<int>, std::string>
+            result(toml::err<std::string>("hoge"));
+        const auto mapped = result.map_err_or_else(
+                [](const std::string i) -> std::string {
+                    return i + i;
+                }, "foobar");
+
+        BOOST_CHECK_EQUAL(mapped, "hogehoge");
+    }
+}
+
+
+BOOST_AUTO_TEST_CASE(test_and_then)
+{
+    {
+        const toml::result<int, std::string> result(toml::ok(42));
+        const auto mapped = result.and_then(
+                [](const int i) -> toml::result<int, std::string> {
+                    return toml::ok(i * 2);
+                });
+
+        BOOST_CHECK(!!mapped);
+        BOOST_CHECK(mapped.is_ok());
+        BOOST_CHECK(!mapped.is_err());
+        BOOST_CHECK_EQUAL(mapped.unwrap(), 42 * 2);
+    }
+    {
+        toml::result<std::unique_ptr<int>, std::string>
+            result(toml::ok(std::unique_ptr<int>(new int(42))));
+        const auto mapped = std::move(result).and_then(
+                [](std::unique_ptr<int> i) -> toml::result<int, std::string> {
+                    return toml::ok(*i);
+                });
+
+        BOOST_CHECK(!!mapped);
+        BOOST_CHECK(mapped.is_ok());
+        BOOST_CHECK(!mapped.is_err());
+        BOOST_CHECK_EQUAL(mapped.unwrap(), 42);
+    }
+    {
+        const toml::result<int, std::string> result(toml::err<std::string>("hoge"));
+        const auto mapped = result.and_then(
+                [](const int i) -> toml::result<int, std::string> {
+                    return toml::ok(i * 2);
+                });
+
+        BOOST_CHECK(!mapped);
+        BOOST_CHECK(!mapped.is_ok());
+        BOOST_CHECK(mapped.is_err());
+        BOOST_CHECK_EQUAL(mapped.unwrap_err(), "hoge");
+    }
+    {
+        toml::result<std::unique_ptr<int>, std::string>
+            result(toml::err<std::string>("hoge"));
+        const auto mapped = std::move(result).and_then(
+                [](std::unique_ptr<int> i) -> toml::result<int, std::string> {
+                    return toml::ok(*i);
+                });
+
+        BOOST_CHECK(!mapped);
+        BOOST_CHECK(!mapped.is_ok());
+        BOOST_CHECK(mapped.is_err());
+        BOOST_CHECK_EQUAL(mapped.unwrap_err(), "hoge");
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_or_else)
+{
+    {
+        const toml::result<int, std::string> result(toml::ok(42));
+        const auto mapped = result.or_else(
+                [](const std::string& s) -> toml::result<int, std::string> {
+                    return toml::err(s + s);
+                });
+
+        BOOST_CHECK(!!mapped);
+        BOOST_CHECK(mapped.is_ok());
+        BOOST_CHECK(!mapped.is_err());
+        BOOST_CHECK_EQUAL(mapped.unwrap(), 42);
+    }
+    {
+        toml::result<std::unique_ptr<int>, std::string>
+            result(toml::ok(std::unique_ptr<int>(new int(42))));
+        const auto mapped = std::move(result).or_else(
+                [](const std::string& s) -> toml::result<std::unique_ptr<int>, std::string> {
+                    return toml::err(s + s);
+                });
+
+        BOOST_CHECK(!!mapped);
+        BOOST_CHECK(mapped.is_ok());
+        BOOST_CHECK(!mapped.is_err());
+        BOOST_CHECK_EQUAL(*mapped.unwrap(), 42);
+    }
+    {
+        const toml::result<int, std::string> result(toml::err<std::string>("hoge"));
+        const auto mapped = result.or_else(
+                [](const std::string& s) -> toml::result<int, std::string> {
+                    return toml::err(s + s);
+                });
+
+        BOOST_CHECK(!mapped);
+        BOOST_CHECK(!mapped.is_ok());
+        BOOST_CHECK(mapped.is_err());
+        BOOST_CHECK_EQUAL(mapped.unwrap_err(), "hogehoge");
+    }
+    {
+        toml::result<std::unique_ptr<int>, std::string>
+            result(toml::err<std::string>("hoge"));
+        const auto mapped = std::move(result).or_else(
+                [](const std::string& s) -> toml::result<std::unique_ptr<int>, std::string> {
+                    return toml::err(s + s);
+                });
+
+        BOOST_CHECK(!mapped);
+        BOOST_CHECK(!mapped.is_ok());
+        BOOST_CHECK(mapped.is_err());
+        BOOST_CHECK_EQUAL(mapped.unwrap_err(), "hogehoge");
+    }
+}

tests/test_to_toml.cpp

@@ -9,97 +9,181 @@
 #include <map>
 #include <list>
 
-BOOST_AUTO_TEST_CASE(test_to_toml_exact)
+BOOST_AUTO_TEST_CASE(test_value_boolean)
 {
-    toml::Boolean  b(true);
-    toml::Integer  i(42);
-    toml::Float    f(3.14);
-    toml::String   s("hoge");
-    toml::Datetime d(std::chrono::system_clock::now());
-    toml::Array    a;
-    a.emplace_back(2);
-    a.emplace_back(7);
-    a.emplace_back(1);
-    a.emplace_back(8);
-    a.emplace_back(2);
-    toml::Table    t;
-    t.emplace("val1", true);
-    t.emplace("val2", 42);
-    t.emplace("val3", 3.14);
-    t.emplace("val4", "piyo");
-
-    auto v1 = toml::to_toml(b);
-    auto v2 = toml::to_toml(i);
-    auto v3 = toml::to_toml(f);
-    auto v4 = toml::to_toml(s);
-    auto v5 = toml::to_toml(d);
-    auto v6 = toml::to_toml(a);
-    auto v7 = toml::to_toml(t);
+    toml::value v1 = toml::to_toml(true);
+    toml::value v2 = toml::to_toml(false);
 
     BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Boolean);
-    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Integer);
-    BOOST_CHECK_EQUAL(v3.type(), toml::value_t::Float);
-    BOOST_CHECK_EQUAL(v4.type(), toml::value_t::String);
-    BOOST_CHECK_EQUAL(v5.type(), toml::value_t::Datetime);
-    BOOST_CHECK_EQUAL(v6.type(), toml::value_t::Array);
-    BOOST_CHECK_EQUAL(v7.type(), toml::value_t::Table);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Boolean);
+    BOOST_CHECK(v1.is(toml::value_t::Boolean));
+    BOOST_CHECK(v2.is(toml::value_t::Boolean));
+    BOOST_CHECK(v1.is<toml::Boolean>());
+    BOOST_CHECK(v2.is<toml::Boolean>());
 
-    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Boolean >(), b);
-    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Integer >(), i);
-    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::Float   >(), f);
-    BOOST_CHECK_EQUAL(v4.cast<toml::value_t::String  >(), s);
-    const auto& ar = v6.cast<toml::value_t::Array>();
-    BOOST_CHECK_EQUAL(ar.at(0).cast<toml::value_t::Integer>(), a.at(0).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(ar.at(1).cast<toml::value_t::Integer>(), a.at(1).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(ar.at(2).cast<toml::value_t::Integer>(), a.at(2).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(ar.at(3).cast<toml::value_t::Integer>(), a.at(3).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(ar.at(4).cast<toml::value_t::Integer>(), a.at(4).cast<toml::value_t::Integer>());
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Boolean>(), true);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Boolean>(), false);
 }
 
-BOOST_AUTO_TEST_CASE(test_to_toml_castable)
+BOOST_AUTO_TEST_CASE(test_value_integer)
 {
-    auto v1 = toml::to_toml(true);
-    auto v2 = toml::to_toml(42ul);
-    auto v3 = toml::to_toml(3.14f);
-    auto v4 = toml::to_toml("hoge");
+    toml::value v1 = toml::to_toml(-42);
+    toml::value v2 = toml::to_toml(42u);
 
-    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Boolean);
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Integer);
     BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Integer);
-    BOOST_CHECK_EQUAL(v3.type(), toml::value_t::Float);
-    BOOST_CHECK_EQUAL(v4.type(), toml::value_t::String);
+    BOOST_CHECK(v1.is(toml::value_t::Integer));
+    BOOST_CHECK(v2.is(toml::value_t::Integer));
+    BOOST_CHECK(v1.is<toml::Integer>());
+    BOOST_CHECK(v2.is<toml::Integer>());
 
-    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Boolean >(), true);
-    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Integer >(), 42);
-    BOOST_CHECK_CLOSE_FRACTION(v3.cast<toml::value_t::Float   >(), 3.14, 1e-5);
-    BOOST_CHECK_EQUAL(v4.cast<toml::value_t::String  >(), "hoge");
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Integer>(), -42);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Integer>(),  42u);
 }
 
-BOOST_AUTO_TEST_CASE(test_to_toml_initializer_list)
+BOOST_AUTO_TEST_CASE(test_value_float)
 {
-    toml::value v1 = toml::to_toml({3,1,4,1,5});
-    toml::value v2 = toml::to_toml({{"hoge", 1}, {"piyo", 3.14}, {"fuga", "string"}});
+    toml::value v1 = toml::to_toml(3.14);
+    toml::value v2 = toml::to_toml(3.14f);
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Float);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Float);
+    BOOST_CHECK(v1.is(toml::value_t::Float));
+    BOOST_CHECK(v2.is(toml::value_t::Float));
+    BOOST_CHECK(v1.is<toml::Float>());
+    BOOST_CHECK(v2.is<toml::Float>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Float>(), 3.14);
+    BOOST_CHECK_CLOSE_FRACTION(v2.cast<toml::value_t::Float>(), 3.14, 1e-2);
+}
+
+BOOST_AUTO_TEST_CASE(test_value_string)
+{
+    toml::value v1 = toml::to_toml(std::string("foo"));
+    toml::value v2 = toml::to_toml(std::string("foo"), toml::string_t::literal);
+    toml::value v3 = toml::to_toml("foo");
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::String);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::String);
+    BOOST_CHECK_EQUAL(v3.type(), toml::value_t::String);
+    BOOST_CHECK(v1.is(toml::value_t::String));
+    BOOST_CHECK(v2.is(toml::value_t::String));
+    BOOST_CHECK(v3.is(toml::value_t::String));
+    BOOST_CHECK(v1.is<toml::String>());
+    BOOST_CHECK(v2.is<toml::String>());
+    BOOST_CHECK(v3.is<toml::String>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::String>(), "foo");
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::String>(), "foo");
+    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::String>(), "foo");
+}
+
+BOOST_AUTO_TEST_CASE(test_value_local_date)
+{
+    toml::value v1 = toml::to_toml(toml::local_date(2018, toml::month_t::Jan, 31));
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::LocalDate);
+    BOOST_CHECK(v1.is(toml::value_t::LocalDate));
+    BOOST_CHECK(v1.is<toml::LocalDate>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::LocalDate>(),
+                      toml::local_date(2018, toml::month_t::Jan, 31));
+}
+
+BOOST_AUTO_TEST_CASE(test_value_local_time)
+{
+    toml::value v1 = toml::to_toml(toml::local_time(12, 30, 45));
+    toml::value v2 = toml::to_toml(std::chrono::hours(12) + std::chrono::minutes(30) +
+                   std::chrono::seconds(45));
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::LocalTime);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::LocalTime);
+    BOOST_CHECK(v1.is(toml::value_t::LocalTime));
+    BOOST_CHECK(v2.is(toml::value_t::LocalTime));
+    BOOST_CHECK(v1.is<toml::LocalTime>());
+    BOOST_CHECK(v2.is<toml::LocalTime>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::LocalTime>(),
+                      toml::local_time(12, 30, 45));
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::LocalTime>(),
+                      toml::local_time(12, 30, 45));
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::LocalTime>(),
+                      v2.cast<toml::value_t::LocalTime>());
+}
+
+BOOST_AUTO_TEST_CASE(test_value_local_datetime)
+{
+    toml::value v1 = toml::to_toml(toml::local_datetime(
+                toml::local_date(2018, toml::month_t::Jan, 31),
+                toml::local_time(12, 30, 45)
+                ));
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::LocalDatetime);
+    BOOST_CHECK(v1.is(toml::value_t::LocalDatetime));
+    BOOST_CHECK(v1.is<toml::LocalDatetime>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::LocalDatetime>(),
+                      toml::local_datetime(
+                          toml::local_date(2018, toml::month_t::Jan, 31),
+                          toml::local_time(12, 30, 45)));
+}
+
+BOOST_AUTO_TEST_CASE(test_value_offset_datetime)
+{
+    toml::value v1 = toml::to_toml(toml::offset_datetime(
+                toml::local_date(2018, toml::month_t::Jan, 31),
+                toml::local_time(12, 30, 45),
+                toml::time_offset(9, 0)
+                ));
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::OffsetDatetime);
+    BOOST_CHECK(v1.is(toml::value_t::OffsetDatetime));
+    BOOST_CHECK(v1.is<toml::OffsetDatetime>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::OffsetDatetime>(),
+            toml::offset_datetime(
+                toml::local_date(2018, toml::month_t::Jan, 31),
+                toml::local_time(12, 30, 45),
+                toml::time_offset(9, 0)
+                ));
+}
+
+BOOST_AUTO_TEST_CASE(test_value_array)
+{
+    std::vector<int> v{1,2,3,4,5};
+    toml::value v1 = toml::to_toml(v);
+    toml::value v2 = toml::to_toml(6,7,8,9,0);
 
     BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Array);
-    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Table);
+    BOOST_CHECK(v1.is(toml::value_t::Array));
+    BOOST_CHECK(v1.is<toml::Array>());
 
-    const auto& ar = v1.cast<toml::value_t::Array>();
-    BOOST_CHECK_EQUAL(ar.at(0).cast<toml::value_t::Integer>(), 3);
-    BOOST_CHECK_EQUAL(ar.at(1).cast<toml::value_t::Integer>(), 1);
-    BOOST_CHECK_EQUAL(ar.at(2).cast<toml::value_t::Integer>(), 4);
-    BOOST_CHECK_EQUAL(ar.at(3).cast<toml::value_t::Integer>(), 1);
-    BOOST_CHECK_EQUAL(ar.at(4).cast<toml::value_t::Integer>(), 5);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Array);
+    BOOST_CHECK(v2.is(toml::value_t::Array));
+    BOOST_CHECK(v2.is<toml::Array>());
 
-    const auto& tb = v2.cast<toml::value_t::Table>();
-
-    BOOST_CHECK_EQUAL(tb.at("hoge").type(), toml::value_t::Integer);
-    BOOST_CHECK_EQUAL(tb.at("piyo").type(), toml::value_t::Float);
-    BOOST_CHECK_EQUAL(tb.at("fuga").type(), toml::value_t::String);
-
-    BOOST_CHECK_EQUAL(tb.at("hoge").cast<toml::value_t::Integer>(), 1);
-    BOOST_CHECK_CLOSE_FRACTION(tb.at("piyo").cast<toml::value_t::Float>(), 3.14, 1e-3);
-    BOOST_CHECK_EQUAL(tb.at("fuga").cast<toml::value_t::String>(),  "string");
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Array>().at(0).cast<toml::value_t::Integer>(), 1);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Array>().at(1).cast<toml::value_t::Integer>(), 2);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Array>().at(2).cast<toml::value_t::Integer>(), 3);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Array>().at(3).cast<toml::value_t::Integer>(), 4);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Array>().at(4).cast<toml::value_t::Integer>(), 5);
 
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Array>().at(0).cast<toml::value_t::Integer>(), 6);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Array>().at(1).cast<toml::value_t::Integer>(), 7);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Array>().at(2).cast<toml::value_t::Integer>(), 8);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Array>().at(3).cast<toml::value_t::Integer>(), 9);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Array>().at(4).cast<toml::value_t::Integer>(), 0);
 }
 
+BOOST_AUTO_TEST_CASE(test_value_table)
+{
+    toml::value v1 = toml::to_toml({{"foo", 42}, {"bar", 3.14}, {"baz", "qux"}});
 
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Table);
+    BOOST_CHECK(v1.is(toml::value_t::Table));
+    BOOST_CHECK(v1.is<toml::Table>());
 
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Table>().at("foo").cast<toml::value_t::Integer>(),    42);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Table>().at("bar").cast<toml::value_t::Float>(),      3.14);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Table>().at("baz").cast<toml::value_t::String>().str, "qux");
+}

tests/test_traits.cpp

@@ -5,7 +5,7 @@
 #define BOOST_TEST_NO_LIB
 #include <boost/test/included/unit_test.hpp>
 #endif
-#include <toml.hpp>
+#include <toml/types.hpp>
 
 #include <list>
 #include <forward_list>
@@ -74,16 +74,11 @@ BOOST_AUTO_TEST_CASE(test_is_xxx)
     BOOST_CHECK(toml::detail::is_container<std_array_type>::value);
     BOOST_CHECK(toml::detail::is_container<std::set<dummy_type>>::value);
     BOOST_CHECK(toml::detail::is_container<std::unordered_set<std::string>>::value);
-    BOOST_CHECK(toml::detail::is_container<std_map_type>::value);
-    BOOST_CHECK(toml::detail::is_container<std_unordered_map_type>::value);
     BOOST_CHECK(toml::detail::is_container<dummy_container<dummy_type>>::value);
 
+    BOOST_CHECK(!toml::detail::is_container<std_map_type>::value);
+    BOOST_CHECK(!toml::detail::is_container<std_unordered_map_type>::value);
+
     BOOST_CHECK(toml::detail::is_map<std_map_type>::value);
     BOOST_CHECK(toml::detail::is_map<std_unordered_map_type>::value);
-
-    BOOST_CHECK(toml::detail::is_key_convertible<std_map_type>::value);
-    BOOST_CHECK(toml::detail::is_key_convertible<std_unordered_map_type>::value);
 }
-
-
-

tests/test_utility.cpp

@@ -30,7 +30,7 @@ BOOST_AUTO_TEST_CASE(test_resize)
             thrown = true;
         }
         BOOST_CHECK(!thrown);
-        BOOST_CHECK_EQUAL(v.size(), 10);
+        BOOST_CHECK_EQUAL(v.size(), 10u);
     }
 
     {
@@ -45,7 +45,7 @@ BOOST_AUTO_TEST_CASE(test_resize)
             thrown = true;
         }
         BOOST_CHECK(!thrown);
-        BOOST_CHECK_EQUAL(a.size(), 15);
+        BOOST_CHECK_EQUAL(a.size(), 15u);
     }
 
     {
@@ -62,3 +62,21 @@ BOOST_AUTO_TEST_CASE(test_resize)
         BOOST_CHECK(thrown);
     }
 }
+
+BOOST_AUTO_TEST_CASE(test_concat_to_string)
+{
+    const std::string cat = toml::concat_to_string("foo", "bar", 42);
+    BOOST_CHECK(cat == "foobar42");
+}
+
+BOOST_AUTO_TEST_CASE(test_from_string)
+{
+    {
+        const std::string str("123");
+        BOOST_CHECK_EQUAL(toml::from_string<int>(str, 0), 123);
+    }
+    {
+        const std::string str("01");
+        BOOST_CHECK_EQUAL(toml::from_string<int>(str, 0), 1);
+    }
+}

tests/test_value.cpp

@@ -5,223 +5,604 @@
 #define BOOST_TEST_NO_LIB
 #include <boost/test/included/unit_test.hpp>
 #endif
-#include <toml.hpp>
+#include <toml/value.hpp>
 #include <map>
 #include <list>
 
-BOOST_AUTO_TEST_CASE(test_value_exact_constructor)
+BOOST_AUTO_TEST_CASE(test_value_boolean)
 {
-    toml::Boolean  b(true);
-    toml::Integer  i(42);
-    toml::Float    f(3.14);
-    toml::String   s("hoge");
-    toml::Datetime d(std::chrono::system_clock::now());
-    toml::Array    a;
-    a.emplace_back(2);
-    a.emplace_back(7);
-    a.emplace_back(1);
-    a.emplace_back(8);
-    a.emplace_back(2);
-    toml::Table    t;
-    t.emplace("val1", true);
-    t.emplace("val2", 42);
-    t.emplace("val3", 3.14);
-    t.emplace("val4", "piyo");
-
-    toml::value v1(b);
-    toml::value v2(i);
-    toml::value v3(f);
-    toml::value v4(s);
-    toml::value v5(d);
-    toml::value v6(a);
-    toml::value v7(t);
+    toml::value v1(true);
+    toml::value v2(false);
 
     BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Boolean);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Boolean);
+    BOOST_CHECK(v1.is(toml::value_t::Boolean));
+    BOOST_CHECK(v2.is(toml::value_t::Boolean));
+    BOOST_CHECK(v1.is<toml::Boolean>());
+    BOOST_CHECK(v2.is<toml::Boolean>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Boolean>(), true);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Boolean>(), false);
+
+    v1 = false;
+    v2 = true;
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Boolean);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Boolean);
+    BOOST_CHECK(v1.is(toml::value_t::Boolean));
+    BOOST_CHECK(v2.is(toml::value_t::Boolean));
+    BOOST_CHECK(v1.is<toml::Boolean>());
+    BOOST_CHECK(v2.is<toml::Boolean>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Boolean>(), false);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Boolean>(), true);
+
+    toml::value v3(v1);
+    toml::value v4(v2);
+    BOOST_CHECK(v3 == v1);
+    BOOST_CHECK(v4 == v2);
+
+    BOOST_CHECK_EQUAL(v3.type(), toml::value_t::Boolean);
+    BOOST_CHECK_EQUAL(v4.type(), toml::value_t::Boolean);
+    BOOST_CHECK(v3.is(toml::value_t::Boolean));
+    BOOST_CHECK(v4.is(toml::value_t::Boolean));
+    BOOST_CHECK(v3.is<toml::Boolean>());
+    BOOST_CHECK(v4.is<toml::Boolean>());
+
+    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::Boolean>(), false);
+    BOOST_CHECK_EQUAL(v4.cast<toml::value_t::Boolean>(), true);
+
+    toml::value v5(std::move(v1));
+    toml::value v6(std::move(v2));
+
+    BOOST_CHECK_EQUAL(v5.type(), toml::value_t::Boolean);
+    BOOST_CHECK_EQUAL(v6.type(), toml::value_t::Boolean);
+    BOOST_CHECK(v5.is(toml::value_t::Boolean));
+    BOOST_CHECK(v6.is(toml::value_t::Boolean));
+    BOOST_CHECK(v5.is<toml::Boolean>());
+    BOOST_CHECK(v6.is<toml::Boolean>());
+
+    BOOST_CHECK_EQUAL(v5.cast<toml::value_t::Boolean>(), false);
+    BOOST_CHECK_EQUAL(v6.cast<toml::value_t::Boolean>(), true);
+
+    v1 = 42;
+    v2 = 3.14;
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Integer);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Float);
+    BOOST_CHECK(v1.is(toml::value_t::Integer));
+    BOOST_CHECK(v2.is(toml::value_t::Float));
+    BOOST_CHECK(v1.is<toml::Integer>());
+    BOOST_CHECK(v2.is<toml::Float>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Integer>(), 42);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Float>(),   3.14);
+}
+
+BOOST_AUTO_TEST_CASE(test_value_integer)
+{
+    toml::value v1(-42);
+    toml::value v2(42u);
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Integer);
     BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Integer);
-    BOOST_CHECK_EQUAL(v3.type(), toml::value_t::Float);
-    BOOST_CHECK_EQUAL(v4.type(), toml::value_t::String);
-    BOOST_CHECK_EQUAL(v5.type(), toml::value_t::Datetime);
-    BOOST_CHECK_EQUAL(v6.type(), toml::value_t::Array);
-    BOOST_CHECK_EQUAL(v7.type(), toml::value_t::Table);
+    BOOST_CHECK(v1.is(toml::value_t::Integer));
+    BOOST_CHECK(v2.is(toml::value_t::Integer));
+    BOOST_CHECK(v1.is<toml::Integer>());
+    BOOST_CHECK(v2.is<toml::Integer>());
 
-    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Boolean >(), b);
-    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Integer >(), i);
-    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::Float   >(), f);
-    BOOST_CHECK_EQUAL(v4.cast<toml::value_t::String  >(), s);
-    const auto& ar = v6.cast<toml::value_t::Array>();
-    BOOST_CHECK_EQUAL(ar.at(0).cast<toml::value_t::Integer>(), a.at(0).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(ar.at(1).cast<toml::value_t::Integer>(), a.at(1).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(ar.at(2).cast<toml::value_t::Integer>(), a.at(2).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(ar.at(3).cast<toml::value_t::Integer>(), a.at(3).cast<toml::value_t::Integer>());
-    BOOST_CHECK_EQUAL(ar.at(4).cast<toml::value_t::Integer>(), a.at(4).cast<toml::value_t::Integer>());
-}
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Integer>(), -42);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Integer>(),  42u);
 
-BOOST_AUTO_TEST_CASE(test_value_convertible_constructor)
-{
-    int            i(42);
-    float          f(3.14);
-    const char*    s = "hoge";
-
-    toml::value v1(i);
-    toml::value v2(f);
-    toml::value v3(s);
+    v1 = 54;
+    v2 = -54;
 
     BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Integer);
-    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Float);
-    BOOST_CHECK_EQUAL(v3.type(), toml::value_t::String);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Integer);
+    BOOST_CHECK(v1.is(toml::value_t::Integer));
+    BOOST_CHECK(v2.is(toml::value_t::Integer));
+    BOOST_CHECK(v1.is<toml::Integer>());
+    BOOST_CHECK(v2.is<toml::Integer>());
 
-    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Integer >(), i);
-    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Float   >(), f);
-    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::String  >(), s);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Integer>(),  54);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Integer>(), -54);
+
+    toml::value v3(v1);
+    toml::value v4(v2);
+    BOOST_CHECK(v3 == v1);
+    BOOST_CHECK(v4 == v2);
+
+    BOOST_CHECK_EQUAL(v3.type(), toml::value_t::Integer);
+    BOOST_CHECK_EQUAL(v4.type(), toml::value_t::Integer);
+    BOOST_CHECK(v3.is(toml::value_t::Integer));
+    BOOST_CHECK(v4.is(toml::value_t::Integer));
+    BOOST_CHECK(v3.is<toml::Integer>());
+    BOOST_CHECK(v4.is<toml::Integer>());
+
+    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::Integer>(),  54);
+    BOOST_CHECK_EQUAL(v4.cast<toml::value_t::Integer>(), -54);
+
+    toml::value v5(std::move(v1));
+    toml::value v6(std::move(v2));
+
+    BOOST_CHECK_EQUAL(v5.type(), toml::value_t::Integer);
+    BOOST_CHECK_EQUAL(v6.type(), toml::value_t::Integer);
+    BOOST_CHECK(v5.is(toml::value_t::Integer));
+    BOOST_CHECK(v6.is(toml::value_t::Integer));
+    BOOST_CHECK(v5.is<toml::Integer>());
+    BOOST_CHECK(v6.is<toml::Integer>());
+
+    BOOST_CHECK_EQUAL(v5.cast<toml::value_t::Integer>(),  54);
+    BOOST_CHECK_EQUAL(v6.cast<toml::value_t::Integer>(), -54);
+
+    v1 = true;
+    v2 = false;
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Boolean);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Boolean);
+    BOOST_CHECK(v1.is(toml::value_t::Boolean));
+    BOOST_CHECK(v2.is(toml::value_t::Boolean));
+    BOOST_CHECK(v1.is<toml::Boolean>());
+    BOOST_CHECK(v2.is<toml::Boolean>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Boolean>(), true);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Boolean>(), false);
 }
 
-BOOST_AUTO_TEST_CASE(test_value_copy_move_constructor)
+BOOST_AUTO_TEST_CASE(test_value_float)
 {
-    toml::Array a;
-    toml::Table t;
-    toml::value v1(true);
-    toml::value v2(42);
-    toml::value v3(3.14);
-    toml::value v4("hoge");
-    toml::value v5(std::chrono::system_clock::now());
-    toml::value v6(a);
-    toml::value v7(t);
-
-    toml::value u1(v1);
-    toml::value u2(v2);
-    toml::value u3(v3);
-    toml::value u4(v4);
-    toml::value u5(v5);
-    toml::value u6(v6);
-    toml::value u7(v7);
-
-    BOOST_CHECK_EQUAL(u1.type(), toml::value_t::Boolean);
-    BOOST_CHECK_EQUAL(u2.type(), toml::value_t::Integer);
-    BOOST_CHECK_EQUAL(u3.type(), toml::value_t::Float);
-    BOOST_CHECK_EQUAL(u4.type(), toml::value_t::String);
-    BOOST_CHECK_EQUAL(u5.type(), toml::value_t::Datetime);
-    BOOST_CHECK_EQUAL(u6.type(), toml::value_t::Array);
-    BOOST_CHECK_EQUAL(u7.type(), toml::value_t::Table);
-
-    BOOST_CHECK_EQUAL(u1.cast<toml::value_t::Boolean >(), true);
-    BOOST_CHECK_EQUAL(u2.cast<toml::value_t::Integer >(), 42);
-    BOOST_CHECK_EQUAL(u3.cast<toml::value_t::Float   >(), 3.14);
-    BOOST_CHECK_EQUAL(u4.cast<toml::value_t::String  >(), "hoge");
-
-    toml::value w1(std::move(v1));
-    toml::value w2(std::move(v2));
-    toml::value w3(std::move(v3));
-    toml::value w4(std::move(v4));
-    toml::value w5(std::move(v5));
-    toml::value w6(std::move(v6));
-    toml::value w7(std::move(v7));
-
-    BOOST_CHECK_EQUAL(w1.type(), toml::value_t::Boolean);
-    BOOST_CHECK_EQUAL(w2.type(), toml::value_t::Integer);
-    BOOST_CHECK_EQUAL(w3.type(), toml::value_t::Float);
-    BOOST_CHECK_EQUAL(w4.type(), toml::value_t::String);
-    BOOST_CHECK_EQUAL(w5.type(), toml::value_t::Datetime);
-    BOOST_CHECK_EQUAL(w6.type(), toml::value_t::Array);
-    BOOST_CHECK_EQUAL(w7.type(), toml::value_t::Table);
-
-    BOOST_CHECK_EQUAL(w1.cast<toml::value_t::Boolean >(), true);
-    BOOST_CHECK_EQUAL(w2.cast<toml::value_t::Integer >(), 42);
-    BOOST_CHECK_EQUAL(w3.cast<toml::value_t::Float   >(), 3.14);
-    BOOST_CHECK_EQUAL(w4.cast<toml::value_t::String  >(), "hoge");
-}
-
-BOOST_AUTO_TEST_CASE(test_value_copy_move_substitution)
-{
-    toml::Boolean  b(true);
-    toml::Integer  i(42);
-    toml::Float    f(3.14);
-    toml::String   s("hoge");
-    toml::Datetime d(std::chrono::system_clock::now());
-    toml::Array    a;
-    a.emplace_back(2);
-    a.emplace_back(7);
-    a.emplace_back(1);
-    a.emplace_back(8);
-    a.emplace_back(2);
-    toml::Table    t;
-    t.emplace("val1", true);
-    t.emplace("val2", 42);
-    t.emplace("val3", 3.14);
-    t.emplace("val4", "piyo");
-
-    toml::value v1(b);
-    toml::value v2(i);
-    toml::value v3(f);
-    toml::value v4(s);
-    toml::value v5(d);
-    toml::value v6(a);
-    toml::value v7(t);
-
-    v1 = i;
-    v2 = f;
-    v3 = s;
-    v4 = d;
-    v5 = a;
-    v6 = t;
-    v7 = b;
-
-    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Integer);
-    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Float);
-    BOOST_CHECK_EQUAL(v3.type(), toml::value_t::String);
-    BOOST_CHECK_EQUAL(v4.type(), toml::value_t::Datetime);
-    BOOST_CHECK_EQUAL(v5.type(), toml::value_t::Array);
-    BOOST_CHECK_EQUAL(v6.type(), toml::value_t::Table);
-    BOOST_CHECK_EQUAL(v7.type(), toml::value_t::Boolean);
-
-    BOOST_CHECK_EQUAL(v7.cast<toml::value_t::Boolean >(), b);
-    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Integer >(), i);
-    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Float   >(), f);
-    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::String  >(), s);
-
-    v1 = std::move(f);
-    v2 = std::move(s);
-    v3 = std::move(d);
-    v4 = std::move(a);
-    v5 = std::move(t);
-    v6 = std::move(b);
-    v7 = std::move(i);
+    toml::value v1(3.14);
+    toml::value v2(3.14f);
 
     BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Float);
-    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::String);
-    BOOST_CHECK_EQUAL(v3.type(), toml::value_t::Datetime);
-    BOOST_CHECK_EQUAL(v4.type(), toml::value_t::Array);
-    BOOST_CHECK_EQUAL(v5.type(), toml::value_t::Table);
-    BOOST_CHECK_EQUAL(v6.type(), toml::value_t::Boolean);
-    BOOST_CHECK_EQUAL(v7.type(), toml::value_t::Integer);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Float);
+    BOOST_CHECK(v1.is(toml::value_t::Float));
+    BOOST_CHECK(v2.is(toml::value_t::Float));
+    BOOST_CHECK(v1.is<toml::Float>());
+    BOOST_CHECK(v2.is<toml::Float>());
 
-    BOOST_CHECK_EQUAL(v6.cast<toml::value_t::Boolean >(), b);
-    BOOST_CHECK_EQUAL(v7.cast<toml::value_t::Integer >(), i);
-    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Float   >(), f);
-    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::String  >(), s);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Float>(), 3.14);
+    BOOST_CHECK_CLOSE_FRACTION(v2.cast<toml::value_t::Float>(), 3.14, 1e-2);
+
+    v1 = 2.718f;
+    v2 = 2.718;
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Float);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Float);
+    BOOST_CHECK(v1.is(toml::value_t::Float));
+    BOOST_CHECK(v2.is(toml::value_t::Float));
+    BOOST_CHECK(v1.is<toml::Float>());
+    BOOST_CHECK(v2.is<toml::Float>());
+
+    BOOST_CHECK_CLOSE_FRACTION(v1.cast<toml::value_t::Float>(), 2.718, 1e-3);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Float>(), 2.718);
+
+    toml::value v3(v1);
+    toml::value v4(v2);
+    BOOST_CHECK(v3 == v1);
+    BOOST_CHECK(v4 == v2);
+
+    BOOST_CHECK_EQUAL(v3.type(), toml::value_t::Float);
+    BOOST_CHECK_EQUAL(v4.type(), toml::value_t::Float);
+    BOOST_CHECK(v3.is(toml::value_t::Float));
+    BOOST_CHECK(v4.is(toml::value_t::Float));
+    BOOST_CHECK(v3.is<toml::Float>());
+    BOOST_CHECK(v4.is<toml::Float>());
+
+    BOOST_CHECK_CLOSE_FRACTION(v3.cast<toml::value_t::Float>(), 2.718, 1e-3);
+    BOOST_CHECK_EQUAL(v4.cast<toml::value_t::Float>(), 2.718);
+
+    toml::value v5(std::move(v1));
+    toml::value v6(std::move(v2));
+
+    BOOST_CHECK_EQUAL(v5.type(), toml::value_t::Float);
+    BOOST_CHECK_EQUAL(v6.type(), toml::value_t::Float);
+    BOOST_CHECK(v5.is(toml::value_t::Float));
+    BOOST_CHECK(v6.is(toml::value_t::Float));
+    BOOST_CHECK(v5.is<toml::Float>());
+    BOOST_CHECK(v6.is<toml::Float>());
+
+    BOOST_CHECK_CLOSE_FRACTION(v5.cast<toml::value_t::Float>(), 2.718, 1e-3);
+    BOOST_CHECK_EQUAL(v6.cast<toml::value_t::Float>(), 2.718);
+
+    v1 = true;
+    v2 = false;
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Boolean);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Boolean);
+    BOOST_CHECK(v1.is(toml::value_t::Boolean));
+    BOOST_CHECK(v2.is(toml::value_t::Boolean));
+    BOOST_CHECK(v1.is<toml::Boolean>());
+    BOOST_CHECK(v2.is<toml::Boolean>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Boolean>(), true);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Boolean>(), false);
 }
 
-BOOST_AUTO_TEST_CASE(test_value_initializer_list)
+BOOST_AUTO_TEST_CASE(test_value_string)
 {
-    toml::value v1{3,1,4,1,5};
-    toml::value v2{{"hoge", 1}, {"piyo", 3.14}, {"fuga", "string"}};
+    toml::value v1(std::string("foo"));
+    toml::value v2(std::string("foo"), toml::string_t::literal);
+    toml::value v3("foo");
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::String);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::String);
+    BOOST_CHECK_EQUAL(v3.type(), toml::value_t::String);
+    BOOST_CHECK(v1.is(toml::value_t::String));
+    BOOST_CHECK(v2.is(toml::value_t::String));
+    BOOST_CHECK(v3.is(toml::value_t::String));
+    BOOST_CHECK(v1.is<toml::String>());
+    BOOST_CHECK(v2.is<toml::String>());
+    BOOST_CHECK(v3.is<toml::String>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::String>(), "foo");
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::String>(), "foo");
+    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::String>(), "foo");
+
+    v1 = "bar";
+    v2 = "bar";
+    v3 = "bar";
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::String);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::String);
+    BOOST_CHECK_EQUAL(v3.type(), toml::value_t::String);
+    BOOST_CHECK(v1.is(toml::value_t::String));
+    BOOST_CHECK(v2.is(toml::value_t::String));
+    BOOST_CHECK(v3.is(toml::value_t::String));
+    BOOST_CHECK(v1.is<toml::String>());
+    BOOST_CHECK(v2.is<toml::String>());
+    BOOST_CHECK(v3.is<toml::String>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::String>(), "bar");
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::String>(), "bar");
+    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::String>(), "bar");
+
+    toml::value v4(v1);
+    toml::value v5(v2);
+    toml::value v6(v3);
+    BOOST_CHECK(v4 == v1);
+    BOOST_CHECK(v5 == v2);
+    BOOST_CHECK(v6 == v3);
+
+    BOOST_CHECK_EQUAL(v4.type(), toml::value_t::String);
+    BOOST_CHECK_EQUAL(v5.type(), toml::value_t::String);
+    BOOST_CHECK_EQUAL(v6.type(), toml::value_t::String);
+    BOOST_CHECK(v4.is(toml::value_t::String));
+    BOOST_CHECK(v5.is(toml::value_t::String));
+    BOOST_CHECK(v6.is(toml::value_t::String));
+    BOOST_CHECK(v4.is<toml::String>());
+    BOOST_CHECK(v5.is<toml::String>());
+    BOOST_CHECK(v6.is<toml::String>());
+
+    BOOST_CHECK_EQUAL(v4.cast<toml::value_t::String>(), "bar");
+    BOOST_CHECK_EQUAL(v5.cast<toml::value_t::String>(), "bar");
+    BOOST_CHECK_EQUAL(v6.cast<toml::value_t::String>(), "bar");
+
+    v4.cast<toml::value_t::String>().str.at(2) = 'z';
+    v5.cast<toml::value_t::String>().str.at(2) = 'z';
+    v6.cast<toml::value_t::String>().str.at(2) = 'z';
+
+    BOOST_CHECK_EQUAL(v4.type(), toml::value_t::String);
+    BOOST_CHECK_EQUAL(v5.type(), toml::value_t::String);
+    BOOST_CHECK_EQUAL(v6.type(), toml::value_t::String);
+    BOOST_CHECK(v4.is(toml::value_t::String));
+    BOOST_CHECK(v5.is(toml::value_t::String));
+    BOOST_CHECK(v6.is(toml::value_t::String));
+    BOOST_CHECK(v4.is<toml::String>());
+    BOOST_CHECK(v5.is<toml::String>());
+    BOOST_CHECK(v6.is<toml::String>());
+
+    BOOST_CHECK_EQUAL(v4.cast<toml::value_t::String>(), "baz");
+    BOOST_CHECK_EQUAL(v5.cast<toml::value_t::String>(), "baz");
+    BOOST_CHECK_EQUAL(v6.cast<toml::value_t::String>(), "baz");
+
+    v1 = true;
+    v2 = true;
+    v3 = true;
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Boolean);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Boolean);
+    BOOST_CHECK_EQUAL(v3.type(), toml::value_t::Boolean);
+    BOOST_CHECK(v1.is(toml::value_t::Boolean));
+    BOOST_CHECK(v2.is(toml::value_t::Boolean));
+    BOOST_CHECK(v3.is(toml::value_t::Boolean));
+    BOOST_CHECK(v1.is<toml::Boolean>());
+    BOOST_CHECK(v2.is<toml::Boolean>());
+    BOOST_CHECK(v3.is<toml::Boolean>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Boolean>(), true);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Boolean>(), true);
+    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::Boolean>(), true);
+}
+
+BOOST_AUTO_TEST_CASE(test_value_local_date)
+{
+    toml::value v1(toml::local_date(2018, toml::month_t::Jan, 31));
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::LocalDate);
+    BOOST_CHECK(v1.is(toml::value_t::LocalDate));
+    BOOST_CHECK(v1.is<toml::LocalDate>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::LocalDate>(),
+                      toml::local_date(2018, toml::month_t::Jan, 31));
+
+    v1 = toml::local_date(2018, toml::month_t::Apr, 1);
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::LocalDate);
+    BOOST_CHECK(v1.is(toml::value_t::LocalDate));
+    BOOST_CHECK(v1.is<toml::LocalDate>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::LocalDate>(),
+                      toml::local_date(2018, toml::month_t::Apr, 1));
+
+    toml::value v2(v1);
+    BOOST_CHECK(v2 == v1);
+
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::LocalDate);
+    BOOST_CHECK(v2.is(toml::value_t::LocalDate));
+    BOOST_CHECK(v2.is<toml::LocalDate>());
+
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::LocalDate>(),
+                      toml::local_date(2018, toml::month_t::Apr, 1));
+
+    v1 = true;
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Boolean);
+    BOOST_CHECK(v1.is(toml::value_t::Boolean));
+    BOOST_CHECK(v1.is<toml::Boolean>());
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Boolean>(), true);
+}
+
+BOOST_AUTO_TEST_CASE(test_value_local_time)
+{
+    toml::value v1(toml::local_time(12, 30, 45));
+    toml::value v2(std::chrono::hours(12) + std::chrono::minutes(30) +
+                   std::chrono::seconds(45));
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::LocalTime);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::LocalTime);
+    BOOST_CHECK(v1.is(toml::value_t::LocalTime));
+    BOOST_CHECK(v2.is(toml::value_t::LocalTime));
+    BOOST_CHECK(v1.is<toml::LocalTime>());
+    BOOST_CHECK(v2.is<toml::LocalTime>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::LocalTime>(),
+                      toml::local_time(12, 30, 45));
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::LocalTime>(),
+                      toml::local_time(12, 30, 45));
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::LocalTime>(),
+                      v2.cast<toml::value_t::LocalTime>());
+
+    v1 = toml::local_time(1, 30, 0, /*ms*/ 100, /*us*/ 0);
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::LocalTime);
+    BOOST_CHECK(v1.is(toml::value_t::LocalTime));
+    BOOST_CHECK(v1.is<toml::LocalTime>());
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::LocalTime>(),
+                      toml::local_time(1, 30, 0, 100, 0));
+
+    toml::value v3(v1);
+    BOOST_CHECK(v3 == v1);
+
+    BOOST_CHECK_EQUAL(v3.type(), toml::value_t::LocalTime);
+    BOOST_CHECK(v3.is(toml::value_t::LocalTime));
+    BOOST_CHECK(v3.is<toml::LocalTime>());
+
+    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::LocalTime>(),
+                      toml::local_time(1, 30, 0, 100, 0));
+
+    v1 = true;
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Boolean);
+    BOOST_CHECK(v1.is(toml::value_t::Boolean));
+    BOOST_CHECK(v1.is<toml::Boolean>());
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Boolean>(), true);
+}
+
+BOOST_AUTO_TEST_CASE(test_value_local_datetime)
+{
+    toml::value v1(toml::local_datetime(
+                toml::local_date(2018, toml::month_t::Jan, 31),
+                toml::local_time(12, 30, 45)
+                ));
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::LocalDatetime);
+    BOOST_CHECK(v1.is(toml::value_t::LocalDatetime));
+    BOOST_CHECK(v1.is<toml::LocalDatetime>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::LocalDatetime>(),
+                      toml::local_datetime(
+                          toml::local_date(2018, toml::month_t::Jan, 31),
+                          toml::local_time(12, 30, 45)));
+
+    v1 = toml::local_datetime(
+                toml::local_date(2018, toml::month_t::Apr, 1),
+                toml::local_time(1, 15, 30));
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::LocalDatetime);
+    BOOST_CHECK(v1.is(toml::value_t::LocalDatetime));
+    BOOST_CHECK(v1.is<toml::LocalDatetime>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::LocalDatetime>(),
+                      toml::local_datetime(
+                          toml::local_date(2018, toml::month_t::Apr, 1),
+                          toml::local_time(1, 15, 30)));
+
+    toml::value v2(v1);
+    BOOST_CHECK(v2 == v1);
+
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::LocalDatetime);
+    BOOST_CHECK(v2.is(toml::value_t::LocalDatetime));
+    BOOST_CHECK(v2.is<toml::LocalDatetime>());
+
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::LocalDatetime>(),
+                      toml::local_datetime(
+                          toml::local_date(2018, toml::month_t::Apr, 1),
+                          toml::local_time(1, 15, 30)));
+
+    v1 = true;
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Boolean);
+    BOOST_CHECK(v1.is(toml::value_t::Boolean));
+    BOOST_CHECK(v1.is<toml::Boolean>());
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Boolean>(), true);
+}
+
+BOOST_AUTO_TEST_CASE(test_value_offset_datetime)
+{
+    toml::value v1(toml::offset_datetime(
+                toml::local_date(2018, toml::month_t::Jan, 31),
+                toml::local_time(12, 30, 45),
+                toml::time_offset(9, 0)
+                ));
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::OffsetDatetime);
+    BOOST_CHECK(v1.is(toml::value_t::OffsetDatetime));
+    BOOST_CHECK(v1.is<toml::OffsetDatetime>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::OffsetDatetime>(),
+            toml::offset_datetime(
+                toml::local_date(2018, toml::month_t::Jan, 31),
+                toml::local_time(12, 30, 45),
+                toml::time_offset(9, 0)
+                ));
+
+    v1 = toml::offset_datetime(
+                toml::local_date(2018, toml::month_t::Apr, 1),
+                toml::local_time(1, 15, 30),
+                toml::time_offset(9, 0));
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::OffsetDatetime);
+    BOOST_CHECK(v1.is(toml::value_t::OffsetDatetime));
+    BOOST_CHECK(v1.is<toml::OffsetDatetime>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::OffsetDatetime>(),
+            toml::offset_datetime(
+                toml::local_date(2018, toml::month_t::Apr, 1),
+                toml::local_time(1, 15, 30),
+                toml::time_offset(9, 0)));
+
+    toml::value v2(v1);
+    BOOST_CHECK(v2 == v1);
+
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::OffsetDatetime);
+    BOOST_CHECK(v2.is(toml::value_t::OffsetDatetime));
+    BOOST_CHECK(v2.is<toml::OffsetDatetime>());
+
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::OffsetDatetime>(),
+            toml::offset_datetime(
+                toml::local_date(2018, toml::month_t::Apr, 1),
+                toml::local_time(1, 15, 30),
+                toml::time_offset(9, 0)));
+    v1 = true;
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Boolean);
+    BOOST_CHECK(v1.is(toml::value_t::Boolean));
+    BOOST_CHECK(v1.is<toml::Boolean>());
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Boolean>(), true);
+}
+
+BOOST_AUTO_TEST_CASE(test_value_array)
+{
+    std::vector<int> v{1,2,3,4,5};
+    toml::value v1(v);
+    toml::value v2{6,7,8,9,0};
 
     BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Array);
-    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Table);
+    BOOST_CHECK(v1.is(toml::value_t::Array));
+    BOOST_CHECK(v1.is<toml::Array>());
 
-    const auto& ar = v1.cast<toml::value_t::Array>();
-    BOOST_CHECK_EQUAL(ar.at(0).cast<toml::value_t::Integer>(), 3);
-    BOOST_CHECK_EQUAL(ar.at(1).cast<toml::value_t::Integer>(), 1);
-    BOOST_CHECK_EQUAL(ar.at(2).cast<toml::value_t::Integer>(), 4);
-    BOOST_CHECK_EQUAL(ar.at(3).cast<toml::value_t::Integer>(), 1);
-    BOOST_CHECK_EQUAL(ar.at(4).cast<toml::value_t::Integer>(), 5);
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Array);
+    BOOST_CHECK(v2.is(toml::value_t::Array));
+    BOOST_CHECK(v2.is<toml::Array>());
 
-    const auto& tb = v2.cast<toml::value_t::Table>();
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Array>().at(0).cast<toml::value_t::Integer>(), 1);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Array>().at(1).cast<toml::value_t::Integer>(), 2);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Array>().at(2).cast<toml::value_t::Integer>(), 3);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Array>().at(3).cast<toml::value_t::Integer>(), 4);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Array>().at(4).cast<toml::value_t::Integer>(), 5);
 
-    BOOST_CHECK_EQUAL(tb.at("hoge").type(), toml::value_t::Integer);
-    BOOST_CHECK_EQUAL(tb.at("piyo").type(), toml::value_t::Float);
-    BOOST_CHECK_EQUAL(tb.at("fuga").type(), toml::value_t::String);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Array>().at(0).cast<toml::value_t::Integer>(), 6);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Array>().at(1).cast<toml::value_t::Integer>(), 7);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Array>().at(2).cast<toml::value_t::Integer>(), 8);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Array>().at(3).cast<toml::value_t::Integer>(), 9);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Array>().at(4).cast<toml::value_t::Integer>(), 0);
 
-    BOOST_CHECK_EQUAL(tb.at("hoge").cast<toml::value_t::Integer>(), 1);
-    BOOST_CHECK_CLOSE_FRACTION(tb.at("piyo").cast<toml::value_t::Float>(), 3.14, 1e-3);
-    BOOST_CHECK_EQUAL(tb.at("fuga").cast<toml::value_t::String>(),  "string");
+    v1 = {6,7,8,9,0};
+    v2 = v;
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Array);
+    BOOST_CHECK(v1.is(toml::value_t::Array));
+    BOOST_CHECK(v1.is<toml::Array>());
+
+    BOOST_CHECK_EQUAL(v2.type(), toml::value_t::Array);
+    BOOST_CHECK(v2.is(toml::value_t::Array));
+    BOOST_CHECK(v2.is<toml::Array>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Array>().at(0).cast<toml::value_t::Integer>(), 6);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Array>().at(1).cast<toml::value_t::Integer>(), 7);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Array>().at(2).cast<toml::value_t::Integer>(), 8);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Array>().at(3).cast<toml::value_t::Integer>(), 9);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Array>().at(4).cast<toml::value_t::Integer>(), 0);
+
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Array>().at(0).cast<toml::value_t::Integer>(), 1);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Array>().at(1).cast<toml::value_t::Integer>(), 2);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Array>().at(2).cast<toml::value_t::Integer>(), 3);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Array>().at(3).cast<toml::value_t::Integer>(), 4);
+    BOOST_CHECK_EQUAL(v2.cast<toml::value_t::Array>().at(4).cast<toml::value_t::Integer>(), 5);
+
+    toml::value v3(v1);
+    BOOST_CHECK(v3 == v1);
+
+    BOOST_CHECK_EQUAL(v3.type(), toml::value_t::Array);
+    BOOST_CHECK(v3.is(toml::value_t::Array));
+    BOOST_CHECK(v3.is<toml::Array>());
+
+    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::Array>().at(0).cast<toml::value_t::Integer>(), 6);
+    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::Array>().at(1).cast<toml::value_t::Integer>(), 7);
+    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::Array>().at(2).cast<toml::value_t::Integer>(), 8);
+    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::Array>().at(3).cast<toml::value_t::Integer>(), 9);
+    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::Array>().at(4).cast<toml::value_t::Integer>(), 0);
+
+    v1 = true;
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Boolean);
+    BOOST_CHECK(v1.is(toml::value_t::Boolean));
+    BOOST_CHECK(v1.is<toml::Boolean>());
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Boolean>(), true);
+}
+
+BOOST_AUTO_TEST_CASE(test_value_table)
+{
+    toml::value v1{{"foo", 42}, {"bar", 3.14}, {"baz", "qux"}};
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Table);
+    BOOST_CHECK(v1.is(toml::value_t::Table));
+    BOOST_CHECK(v1.is<toml::Table>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Table>().at("foo").cast<toml::value_t::Integer>(),    42);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Table>().at("bar").cast<toml::value_t::Float>(),      3.14);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Table>().at("baz").cast<toml::value_t::String>().str, "qux");
+
+    v1 = toml::table{{"foo", 2.71}, {"bar", 54}, {"baz", "quux"}};
+
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Table);
+    BOOST_CHECK(v1.is(toml::value_t::Table));
+    BOOST_CHECK(v1.is<toml::Table>());
+
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Table>().at("foo").cast<toml::value_t::Float>(),      2.71);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Table>().at("bar").cast<toml::value_t::Integer>(),    54);
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Table>().at("baz").cast<toml::value_t::String>().str, "quux");
+
+    toml::value v3(v1);
+    BOOST_CHECK(v3 == v1);
+
+    BOOST_CHECK_EQUAL(v3.type(), toml::value_t::Table);
+    BOOST_CHECK(v3.is(toml::value_t::Table));
+    BOOST_CHECK(v3.is<toml::Table>());
+
+    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::Table>().at("foo").cast<toml::value_t::Float>(),      2.71);
+    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::Table>().at("bar").cast<toml::value_t::Integer>(),    54);
+    BOOST_CHECK_EQUAL(v3.cast<toml::value_t::Table>().at("baz").cast<toml::value_t::String>().str, "quux");
+
+    v1 = true;
+    BOOST_CHECK_EQUAL(v1.type(), toml::value_t::Boolean);
+    BOOST_CHECK(v1.is(toml::value_t::Boolean));
+    BOOST_CHECK(v1.is<toml::Boolean>());
+    BOOST_CHECK_EQUAL(v1.cast<toml::value_t::Boolean>(), true);
 }

tests/test_value_operator.cpp

@@ -1,98 +0,0 @@
-#define BOOST_TEST_MODULE "test_value_operator"
-#ifdef UNITTEST_FRAMEWORK_LIBRARY_EXIST
-#include <boost/test/unit_test.hpp>
-#else
-#define BOOST_TEST_NO_LIB
-#include <boost/test/included/unit_test.hpp>
-#endif
-#include <toml.hpp>
-#include <map>
-#include <list>
-
-BOOST_AUTO_TEST_CASE(test_value_equal)
-{
-    toml::Boolean  b(true);
-    toml::Integer  i(42);
-    toml::Float    f(3.14);
-    toml::String   s("hoge");
-    toml::Datetime d(std::chrono::system_clock::now());
-    toml::Array    a;
-    a.emplace_back(2);
-    a.emplace_back(7);
-    a.emplace_back(1);
-    a.emplace_back(8);
-    a.emplace_back(2);
-    toml::Table    t;
-    t.emplace("val1", true);
-    t.emplace("val2", 42);
-    t.emplace("val3", 3.14);
-    t.emplace("val4", "piyo");
-
-    toml::value v1(b);
-    toml::value v2(i);
-    toml::value v3(f);
-    toml::value v4(s);
-    toml::value v5(d);
-    toml::value v6(a);
-    toml::value v7(t);
-
-    toml::value u1(b);
-    toml::value u2(i);
-    toml::value u3(f);
-    toml::value u4(s);
-    toml::value u5(d);
-    toml::value u6(a);
-    toml::value u7(t);
-
-    const bool b1 = v1 == u1;
-    const bool b2 = v2 == u2;
-    const bool b3 = v3 == u3;
-    const bool b4 = v4 == u4;
-    const bool b5 = v5 == u5;
-    const bool b6 = v6 == u6;
-    const bool b7 = v7 == u7;
-
-    BOOST_CHECK(b1);
-    BOOST_CHECK(b2);
-    BOOST_CHECK(b3);
-    BOOST_CHECK(b4);
-    BOOST_CHECK(b5);
-    BOOST_CHECK(b6);
-    BOOST_CHECK(b7);
-
-    {
-    const bool n1 = v1 != u1;
-    const bool n2 = v2 != u2;
-    const bool n3 = v3 != u3;
-    const bool n4 = v4 != u4;
-    const bool n5 = v5 != u5;
-    const bool n6 = v6 != u6;
-    const bool n7 = v7 != u7;
-
-    BOOST_CHECK(!n1);
-    BOOST_CHECK(!n2);
-    BOOST_CHECK(!n3);
-    BOOST_CHECK(!n4);
-    BOOST_CHECK(!n5);
-    BOOST_CHECK(!n6);
-    BOOST_CHECK(!n7);
-    }
-
-    {
-    const bool n1 = v1 == u2;
-    const bool n2 = v2 == u3;
-    const bool n3 = v3 == u4;
-    const bool n4 = v4 == u5;
-    const bool n5 = v5 == u6;
-    const bool n6 = v6 == u7;
-    const bool n7 = v7 == u1;
-
-    BOOST_CHECK(!n1);
-    BOOST_CHECK(!n2);
-    BOOST_CHECK(!n3);
-    BOOST_CHECK(!n4);
-    BOOST_CHECK(!n5);
-    BOOST_CHECK(!n6);
-    BOOST_CHECK(!n7);
-    }
-}

toml/acceptor.hpp

@@ -1,777 +0,0 @@
-#ifndef TOML11_ACCEPTOR
-#define TOML11_ACCEPTOR
-#include <type_traits>
-#include <iterator>
-#include <limits>
-#include "exception.hpp"
-
-namespace toml
-{
-
-template<typename charT, charT c>
-struct is_character
-{
-    typedef charT value_type;
-    constexpr static value_type target = c;
-
-    template<typename Iterator, class = typename std::enable_if<
-        std::is_same<typename std::iterator_traits<Iterator>::value_type,
-                     value_type>::value>::type>
-    constexpr static Iterator invoke(Iterator iter, Iterator end)
-    {
-        return iter == end ? iter : *iter == c ? std::next(iter) : iter;
-    }
-};
-
-template<typename charT, charT lw, charT up>
-struct is_in_range
-{
-    typedef charT value_type;
-    constexpr static value_type upper = up;
-    constexpr static value_type lower = lw;
-    static_assert(lower <= upper, "lower <= upper");
-
-    template<typename Iterator, class = typename std::enable_if<
-        std::is_same<typename std::iterator_traits<Iterator>::value_type,
-                     value_type>::value>::type>
-    constexpr static Iterator invoke(Iterator iter, Iterator end)
-    {
-        return iter == end ? iter :
-            (lower <= *iter && *iter <= upper) ? std::next(iter) : iter;
-    }
-};
-
-template<typename headT, typename ... condT>
-struct is_one_of
-{
-    typedef typename headT::value_type value_type;
-    static_assert(
-        std::is_same<value_type, typename is_one_of<condT...>::value_type>::value,
-        "different value_type");
-
-    template<typename Iterator, class = typename std::enable_if<
-        std::is_same<typename std::iterator_traits<Iterator>::value_type,
-                     value_type>::value>::type>
-    static Iterator invoke(Iterator iter, Iterator end)
-    {
-        const Iterator tmp = headT::invoke(iter, end);
-        return (tmp != iter) ? tmp : is_one_of<condT...>::invoke(iter, end);
-    }
-};
-template<typename tailT>
-struct is_one_of<tailT>
-{
-    typedef typename tailT::value_type value_type;
-
-    template<typename Iterator, class = typename std::enable_if<
-        std::is_same<typename std::iterator_traits<Iterator>::value_type,
-                     value_type>::value>::type>
-    static Iterator invoke(Iterator iter, Iterator end)
-    {
-        const Iterator tmp = tailT::invoke(iter, end);
-        return (tmp != iter) ? tmp : iter;
-    }
-};
-
-// just a wrapper for maybe_ignored
-template<typename condT>
-struct is_ignorable
-{
-    typedef typename condT::value_type value_type;
-
-    template<typename Iterator, class = typename std::enable_if<
-        std::is_same<typename std::iterator_traits<Iterator>::value_type,
-                     value_type>::value>::type>
-    static Iterator invoke(Iterator iter, Iterator end)
-    {
-        const Iterator tmp = condT::invoke(iter, end);
-        return (tmp != iter) ? tmp : iter;
-    }
-};
-
-template<typename condT>
-struct maybe_ignored : std::false_type{};
-template<typename condT>
-struct maybe_ignored<is_ignorable<condT>> : std::true_type{};
-
-template<typename headT, typename ... condT>
-struct is_chain_of_impl
-{
-    typedef typename headT::value_type value_type;
-    static_assert(std::is_same<value_type,
-                      typename is_chain_of_impl<condT...>::value_type>::value,
-                  "different value_type");
-
-    constexpr static bool ignorable = maybe_ignored<headT>::value;
-
-    template<typename Iterator, class = typename std::enable_if<
-        std::is_same<typename std::iterator_traits<Iterator>::value_type,
-                     value_type>::value>::type>
-    static Iterator invoke(Iterator iter, Iterator end, Iterator rollback)
-    {
-        const Iterator tmp = headT::invoke(iter, end);
-        return (tmp == iter && !ignorable) ? rollback :
-                is_chain_of_impl<condT...>::invoke(tmp, end, rollback);
-    }
-};
-
-template<typename tailT>
-struct is_chain_of_impl<tailT>
-{
-    typedef typename tailT::value_type value_type;
-    constexpr static bool ignorable = maybe_ignored<tailT>::value;
-
-    template<typename Iterator, class = typename std::enable_if<
-        std::is_same<typename std::iterator_traits<Iterator>::value_type,
-                     value_type>::value>::type>
-    static Iterator invoke(Iterator iter, Iterator end, Iterator rollback)
-    {
-        const Iterator tmp = tailT::invoke(iter, end);
-        return (tmp == iter) ? (ignorable ? iter : rollback) : tmp;
-    }
-};
-
-template<typename headT, typename ...condT>
-struct is_chain_of
-{
-    typedef typename is_chain_of_impl<headT, condT...>::value_type value_type;
-
-    template<typename Iterator, class = typename std::enable_if<
-        std::is_same<typename std::iterator_traits<Iterator>::value_type,
-                     value_type>::value>::type>
-    static Iterator invoke(Iterator iter, Iterator end)
-    {
-        return is_chain_of_impl<headT, condT...>::invoke(iter, end, iter);
-    }
-};
-
-constexpr inline std::size_t repeat_infinite(){return 0ul;}
-
-template<typename condT, std::size_t N>
-struct is_repeat_of
-{
-    typedef typename condT::value_type value_type;
-
-    template<typename Iterator, class = typename std::enable_if<
-        std::is_same<typename std::iterator_traits<Iterator>::value_type,
-                     value_type>::value>::type>
-    static Iterator invoke(Iterator iter, Iterator end)
-    {
-        const Iterator rollback = iter;
-        Iterator tmp;
-        for(auto i=0ul; i<N; ++i)
-        {
-            tmp = condT::invoke(iter, end);
-            if(tmp == iter) return rollback;
-            iter = tmp;
-        }
-        return iter;
-    }
-};
-
-template<typename condT>
-struct is_repeat_of<condT, 0>
-{
-    typedef typename condT::value_type value_type;
-
-    template<typename Iterator, class = typename std::enable_if<
-        std::is_same<typename std::iterator_traits<Iterator>::value_type,
-                     value_type>::value>::type>
-    static Iterator invoke(Iterator iter, Iterator end)
-    {
-        Iterator tmp = condT::invoke(iter, end);
-        while(tmp != iter)
-        {
-            iter = tmp;
-            tmp = condT::invoke(iter, end);
-        }
-        return iter;
-    }
-};
-
-template<typename headT, typename ... tailT>
-struct is_none_of
-{
-    typedef typename headT::value_type value_type;
-    static_assert(
-        std::is_same<value_type, typename is_one_of<tailT...>::value_type>::value,
-        "different value_type");
-
-    template<typename Iterator, class = typename std::enable_if<
-        std::is_same<typename std::iterator_traits<Iterator>::value_type,
-                     value_type>::value>::type>
-    static Iterator invoke(Iterator iter, Iterator end)
-    {
-        const Iterator tmp = headT::invoke(iter, end);
-        return (tmp != iter) ? iter : is_none_of<tailT...>::invoke(iter, end);
-    }
-};
-
-template<typename tailT>
-struct is_none_of<tailT>
-{
-    typedef typename tailT::value_type value_type;
-
-    template<typename Iterator, class = typename std::enable_if<
-        std::is_same<typename std::iterator_traits<Iterator>::value_type,
-                     value_type>::value>::type>
-    static Iterator invoke(Iterator iter, Iterator end)
-    {
-        const Iterator tmp = tailT::invoke(iter, end);
-        return (tmp != iter) ? iter : std::next(iter);
-    }
-};
-
-template<typename notT, typename butT>
-struct is_not_but
-{
-    typedef typename notT::value_type value_type;
-    static_assert(
-        std::is_same<value_type, typename butT::value_type>::value,
-        "different value type");
-
-    template<typename Iterator, class = typename std::enable_if<
-        std::is_same<typename std::iterator_traits<Iterator>::value_type,
-                     value_type>::value>::type>
-    static Iterator invoke(Iterator iter, Iterator end)
-    {
-        return (iter != notT::invoke(iter, end)) ? iter : butT::invoke(iter, end);
-    }
-};
-
-template<typename charT>
-using is_space      = is_character<charT, ' '>;
-template<typename charT>
-using is_tab        = is_character<charT, '\t'>;
-template<typename charT>
-using is_number     = is_in_range<charT, '0', '9'>;
-template<typename charT>
-using is_lowercase  = is_in_range<charT, 'a', 'z'>;
-template<typename charT>
-using is_uppercase  = is_in_range<charT, 'A', 'Z'>;
-template<typename charT>
-using is_alphabet   = is_one_of<is_lowercase<charT>, is_uppercase<charT>>;
-template<typename charT>
-using is_hex = is_one_of<is_number<charT>, is_in_range<charT, 'a', 'f'>,
-                         is_in_range<charT, 'A', 'F'>>;
-template<typename charT>
-using is_whitespace = is_one_of<is_space<charT>, is_tab<charT>>;
-template<typename charT>
-using is_any_num_of_ws =
-    is_ignorable<is_repeat_of<is_whitespace<charT>, repeat_infinite()>>;
-
-template<typename charT>
-using is_newline    = is_one_of<is_character<charT, '\n'>,
-    is_chain_of<is_character<charT, '\r'>, is_character<charT, '\n'>>>;
-template<typename charT>
-using is_barekey_component = is_one_of<is_alphabet<charT>, is_number<charT>,
-    is_character<charT, '_'>, is_character<charT, '-'>>;
-template<typename charT>
-using is_barekey = is_repeat_of<is_barekey_component<charT>, repeat_infinite()>;
-template<typename charT>
-using is_comment =
-    is_chain_of<
-        is_character<charT, '#'>,
-        is_repeat_of<is_none_of<is_newline<charT>>, repeat_infinite()>,
-        is_newline<charT>
-    >;
-
-template<typename charT>
-using is_basic_inline_string_component =
-    is_one_of<
-        is_none_of< is_in_range<charT, '\0', '\31'>, is_character<charT, '\"'>,
-                    is_character<charT, '\\'>, is_newline<charT>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, '\"'>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, '\\'>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, 'b'>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, 't'>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, 'n'>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, 'f'>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, 'r'>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, 'u'>,
-                    is_repeat_of<is_hex<charT>, 4>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, 'U'>,
-                    is_repeat_of<is_hex<charT>, 8>>
-        >;
-template<typename charT>
-using is_basic_inline_string =
-    is_not_but<
-        is_repeat_of<is_character<charT, '\"'>, 3>, // not multiline
-        is_chain_of<
-            is_character<charT, '\"'>,
-            is_ignorable<is_repeat_of<is_basic_inline_string_component<charT>,
-                                      repeat_infinite()>>,
-            is_character<charT, '\"'>
-        >
-    >;
-template<typename charT>
-using is_basic_multiline_string_component =
-    is_one_of<
-        is_none_of< is_in_range<charT, '\0', '\31'>,
-                    is_repeat_of<is_character<charT, '\"'>, 3>,
-                    is_character<charT, '\\'>>,
-        is_newline<charT>,
-        is_chain_of<is_character<charT, '\\'>, is_newline<charT>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, '\"'>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, '\\'>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, 'b'>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, 't'>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, 'n'>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, 'f'>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, 'r'>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, 'u'>,
-                    is_repeat_of<is_hex<charT>, 4>>,
-        is_chain_of<is_character<charT, '\\'>, is_character<charT, 'U'>,
-                    is_repeat_of<is_hex<charT>, 8>>
-        >;
-template<typename charT>
-using is_basic_multiline_string =
-    is_chain_of<
-        is_repeat_of<is_character<charT, '\"'>, 3>,
-        is_ignorable<is_repeat_of<is_basic_multiline_string_component<charT>,
-                                  repeat_infinite()>>,
-        is_repeat_of<is_character<charT, '\"'>, 3>
-    >;
-
-template<typename charT>
-using is_literal_inline_string_component =
-    is_none_of<is_in_range<charT, '\0', '\31'>, is_character<charT, '\''>>;
-
-template<typename charT>
-using is_literal_inline_string =
-    is_not_but<
-        is_repeat_of<is_character<charT, '\''>, 3>,
-        is_chain_of<
-            is_character<charT, '\''>,
-            is_ignorable<is_repeat_of<is_literal_inline_string_component<charT>,
-                                      repeat_infinite()>>,
-            is_character<charT, '\''>
-        >
-    >;
-
-template<typename charT>
-using is_literal_multiline_string_component =
-    is_one_of<
-        is_none_of<is_in_range<charT, '\0', '\31'>,
-                   is_repeat_of<is_character<charT, '\''>, 3>>,
-        is_newline<charT>
-    >;
-
-template<typename charT>
-using is_literal_multiline_string =
-    is_chain_of<
-        is_repeat_of<is_character<charT, '\''>, 3>,
-        is_ignorable<is_repeat_of<is_literal_multiline_string_component<charT>,
-                                  repeat_infinite()>>,
-        is_repeat_of<is_character<charT, '\''>, 3>
-    >;
-
-template<typename charT>
-using is_string =
-    is_one_of<
-        is_basic_inline_string<charT>,
-        is_basic_multiline_string<charT>,
-        is_literal_inline_string<charT>,
-        is_literal_multiline_string<charT>
-    >;
-
-
-template<typename charT>
-using is_sign = is_one_of<is_character<charT, '+'>, is_character<charT, '-'>>;
-template<typename charT>
-using is_nonzero_number = is_in_range<charT, '1', '9'>;
-
-template<typename charT>
-using is_integer_component =
-    is_not_but<
-        is_repeat_of<is_character<charT, '_'>, 2>,
-        is_one_of<
-            is_character<charT, '_'>, is_number<charT>
-        >
-    >;
-template<typename charT>
-using is_integer =
-    is_chain_of<
-        is_ignorable<is_sign<charT>>,
-        is_one_of<
-            is_character<charT, '0'>,
-            is_chain_of<
-                is_nonzero_number<charT>,
-                is_ignorable<is_repeat_of<is_integer_component<charT>,
-                                          repeat_infinite()>
-                >
-            >
-        >
-    >;
-
-template<typename charT>
-using is_fractional_part =
-    is_chain_of<
-        is_character<charT, '.'>,
-        is_repeat_of<is_integer_component<charT>, repeat_infinite()>
-    >;
-template<typename charT>
-using is_exponent_part =
-    is_chain_of<
-        is_one_of<is_character<charT, 'e'>, is_character<charT, 'E'>>,
-        is_integer<charT>
-    >;
-template<typename charT>
-using is_float =
-    is_one_of<
-        is_chain_of<
-            is_integer<charT>,
-            is_fractional_part<charT>,
-            is_exponent_part<charT>
-        >,
-        is_chain_of<
-            is_integer<charT>,
-            is_fractional_part<charT>
-        >,
-        is_chain_of<
-            is_integer<charT>,
-            is_exponent_part<charT>
-        >
-    >;
-
-template<typename charT>
-using is_boolean =
-    is_one_of<
-        is_chain_of<
-            is_character<charT, 't'>,
-            is_character<charT, 'r'>,
-            is_character<charT, 'u'>,
-            is_character<charT, 'e'>
-        >,
-        is_chain_of<
-            is_character<charT, 'f'>,
-            is_character<charT, 'a'>,
-            is_character<charT, 'l'>,
-            is_character<charT, 's'>,
-            is_character<charT, 'e'>
-        >
-    >;
-
-template<typename charT>
-using is_local_time =
-    is_chain_of<
-        is_repeat_of<is_number<charT>, 2>,
-        is_character<charT, ':'>,
-        is_repeat_of<is_number<charT>, 2>,
-        is_character<charT, ':'>,
-        is_repeat_of<is_number<charT>, 2>,
-        is_ignorable<
-            is_chain_of<
-                is_character<charT, '.'>,
-                is_repeat_of<is_number<charT>, repeat_infinite()>
-            >
-        >
-    >;
-
-template<typename charT>
-using is_local_date =
-    is_chain_of<
-        is_repeat_of<is_number<charT>, 4>,
-        is_character<charT, '-'>,
-        is_repeat_of<is_number<charT>, 2>,
-        is_character<charT, '-'>,
-        is_repeat_of<is_number<charT>, 2>
-    >;
-
-template<typename charT>
-using is_local_date_time =
-    is_chain_of<
-        is_local_date<charT>,
-        is_character<charT, 'T'>,
-        is_local_time<charT>
-    >;
-
-template<typename charT>
-using is_offset =
-    is_one_of<
-        is_character<charT, 'Z'>,
-        is_chain_of<
-            is_sign<charT>,
-            is_repeat_of<is_number<charT>, 2>,
-            is_character<charT, ':'>,
-            is_repeat_of<is_number<charT>, 2>
-        >
-    >;
-
-template<typename charT>
-using is_offset_date_time =
-    is_chain_of<
-        is_local_date_time<charT>,
-        is_offset<charT>
-    >;
-
-template<typename charT>
-using is_datetime =
-    is_one_of<
-        is_offset_date_time<charT>,
-        is_local_date_time<charT>,
-        is_local_date<charT>,
-        is_local_time<charT>
-    >;
-
-template<typename charT>
-using is_fundamental_type =
-    is_one_of<
-        is_basic_inline_string<charT>,
-        is_basic_multiline_string<charT>,
-        is_literal_inline_string<charT>,
-        is_literal_multiline_string<charT>,
-        is_offset_date_time<charT>,
-        is_local_date_time<charT>,
-        is_local_date<charT>,
-        is_local_time<charT>,
-        is_boolean<charT>,
-        is_float<charT>,
-        is_integer<charT>
-    >;
-
-template<typename charT>
-using is_skippable_in_array =
-    is_repeat_of<
-        is_one_of<is_whitespace<charT>, is_newline<charT>, is_comment<charT>>,
-        repeat_infinite()
-    >;
-
-template<typename charT>
-struct is_inline_table;
-
-template<typename charT>
-using is_key =
-    is_one_of<
-        is_barekey<charT>,
-        is_string<charT>
-    >;
-
-
-template<typename charT, typename is_array_component>
-using is_fixed_type_array =
-    is_chain_of<
-        is_character<charT, '['>,
-        is_ignorable<
-            is_repeat_of<
-                is_chain_of<
-                    is_ignorable<is_skippable_in_array<charT>>,
-                    is_array_component,
-                    is_ignorable<is_skippable_in_array<charT>>,
-                    is_character<charT, ','>
-                >,
-                repeat_infinite()
-            >
-        >,
-        is_ignorable<
-            is_chain_of<
-                is_ignorable<is_skippable_in_array<charT>>,
-                is_array_component,
-                is_ignorable<is_skippable_in_array<charT>>,
-                is_ignorable<is_character<charT, ','>>
-            >
-        >,
-        is_ignorable<is_skippable_in_array<charT>>,
-        is_character<charT, ']'>
-    >;
-
-template<typename charT>
-struct is_array
-{
-    typedef charT value_type;
-
-    template<typename Iterator, class = typename std::enable_if<
-        std::is_same<typename std::iterator_traits<Iterator>::value_type,
-                     value_type>::value>::type>
-    static Iterator invoke(Iterator iter, Iterator end)
-    {
-        return is_one_of<
-                is_fixed_type_array<charT, is_boolean<charT>>,
-                is_fixed_type_array<charT, is_integer<charT>>,
-                is_fixed_type_array<charT, is_float<charT>>,
-                is_fixed_type_array<charT, is_string<charT>>,
-                is_fixed_type_array<charT, is_datetime<charT>>,
-                is_fixed_type_array<charT, is_array<charT>>,
-                is_fixed_type_array<charT, is_inline_table<charT>>
-            >::invoke(iter, end);
-    }
-};
-
-template<typename charT>
-struct is_inline_table
-{
-    typedef charT value_type;
-
-    template<typename Iterator, class = typename std::enable_if<
-        std::is_same<typename std::iterator_traits<Iterator>::value_type,
-                     value_type>::value>::type>
-    static Iterator invoke(Iterator iter, Iterator end)
-    {
-        typedef is_one_of<is_fundamental_type<charT>,
-                          is_array<charT>, is_inline_table<charT>> is_component;
-
-        typedef is_chain_of<
-            is_any_num_of_ws<charT>,
-            is_key<charT>,
-            is_any_num_of_ws<charT>,
-            is_character<charT, '='>,
-            is_any_num_of_ws<charT>,
-            is_component,
-            is_any_num_of_ws<charT>
-        > is_inline_key_value_pair;
-
-        typedef is_chain_of<
-            is_character<charT, '{'>,
-            is_ignorable<
-                is_repeat_of<
-                    is_chain_of<
-                        is_any_num_of_ws<charT>,
-                        is_inline_key_value_pair,
-                        is_any_num_of_ws<charT>,
-                        is_character<charT, ','>
-                    >,
-                    repeat_infinite()
-                >
-            >,
-            is_ignorable<
-                is_chain_of<
-                    is_any_num_of_ws<charT>,
-                    is_inline_key_value_pair,
-                    is_any_num_of_ws<charT>,
-                    is_ignorable<is_character<charT, ','>>
-                >
-            >,
-            is_any_num_of_ws<charT>,
-            is_character<charT, '}'>
-            > entity;
-        return entity::invoke(iter, end);
-    }
-};
-
-template<typename charT>
-using is_value =
-    is_one_of<is_fundamental_type<charT>, is_array<charT>, is_inline_table<charT>>;
-
-// []
-template<typename charT>
-using is_table_definition =
-    is_chain_of<
-        is_any_num_of_ws<charT>,
-        is_character<charT, '['>,
-        is_any_num_of_ws<charT>,
-        is_key<charT>,
-        is_ignorable<
-            is_repeat_of<
-                is_chain_of<
-                    is_any_num_of_ws<charT>,
-                    is_character<charT, '.'>,
-                    is_any_num_of_ws<charT>,
-                    is_key<charT>,
-                    is_any_num_of_ws<charT>
-                >,
-            repeat_infinite()>
-            >,
-        is_character<charT, ']'>
-    >;
-
-template<typename charT>
-using is_array_of_table_definition =
-    is_chain_of<
-        is_any_num_of_ws<charT>,
-        is_repeat_of<is_character<charT, '['>, 2>,
-        is_any_num_of_ws<charT>,
-        is_key<charT>,
-        is_ignorable<
-            is_repeat_of<
-                is_chain_of<
-                    is_any_num_of_ws<charT>,
-                    is_character<charT, '.'>,
-                    is_any_num_of_ws<charT>,
-                    is_key<charT>,
-                    is_any_num_of_ws<charT>
-                >,
-            repeat_infinite()>
-            >,
-        is_repeat_of<is_character<charT, ']'>, 2>
-    >;
-
-template<typename charT>
-using is_key_value_pair =
-    is_chain_of<
-        is_any_num_of_ws<charT>,
-        is_key<charT>,
-        is_any_num_of_ws<charT>,
-        is_character<charT, '='>,
-        is_any_num_of_ws<charT>,
-        is_value<charT>,
-        is_any_num_of_ws<charT>
-    >;
-
-template<typename charT>
-using is_empty_line =
-    is_chain_of<
-        is_any_num_of_ws<charT>,
-        is_one_of<is_comment<charT>, is_newline<charT>>
-    >;
-
-template<typename charT>
-using is_empty_lines =
-    is_repeat_of<
-        is_chain_of<
-            is_any_num_of_ws<charT>,
-            is_one_of<is_comment<charT>, is_newline<charT>>
-        >,
-        repeat_infinite()
-    >;
-
-template<typename charT>
-using is_table_contents =
-    is_repeat_of<
-        is_one_of<
-            is_empty_lines<charT>,
-            is_chain_of<
-                is_key_value_pair<charT>,
-                is_one_of<
-                    is_comment<charT>,
-                    is_newline<charT>
-                >
-            >
-        >,
-        repeat_infinite()
-    >;
-
-template<typename charT>
-using is_standard_table =
-    is_chain_of<
-        is_table_definition<charT>,
-        is_any_num_of_ws<charT>,
-        is_one_of<is_comment<charT>, is_newline<charT>>,
-        is_table_contents<charT>
-    >;
-
-template<typename charT>
-using is_array_of_table =
-    is_chain_of<
-        is_array_of_table_definition<charT>,
-        is_any_num_of_ws<charT>,
-        is_one_of<is_comment<charT>, is_newline<charT>>,
-        is_table_contents<charT>
-    >;
-
-template<typename charT>
-using is_toml_data =
-    is_chain_of<
-        is_ignorable<is_table_contents<charT>>,
-        is_ignorable<
-            is_repeat_of<
-                is_one_of<
-                    is_standard_table<charT>,
-                    is_array_of_table<charT>
-                >,
-                repeat_infinite()
-            >
-        >
-    >;
-
-}//toml
-#endif// TOML11_ACCEPTOR

toml/combinator.hpp

@@ -0,0 +1,364 @@
+//     Copyright Toru Niina 2017.
+// Distributed under the MIT License.
+#ifndef TOML11_COMBINATOR_HPP
+#define TOML11_COMBINATOR_HPP
+#include "traits.hpp"
+#include "result.hpp"
+#include "utility.hpp"
+#include "region.hpp"
+#include <type_traits>
+#include <iterator>
+#include <limits>
+#include <iomanip>
+#include <cctype>
+
+// they scans characters and returns region if it matches to the condition.
+// when they fail, it does not change the location.
+// in lexer.hpp, these are used.
+
+namespace toml
+{
+namespace detail
+{
+
+// to output character as an error message.
+inline std::string show_char(const char c)
+{
+    // It supress an error that occurs only in Debug mode of MSVC++ on Windows.
+    // I'm not completely sure but they check the value of char to be in the
+    // range [0, 256) and some of the COMPLETELY VALID utf-8 character sometimes
+    // has negative value (if char has sign). So here it re-interprets c as
+    // unsigned char through pointer. In general, converting pointer to a
+    // pointer that has different type cause UB, but `(signed|unsigned)?char`
+    // are one of the exceptions. Converting pointer only to char and std::byte
+    // (c++17) are valid.
+    if(std::isgraph(*reinterpret_cast<unsigned char const*>(std::addressof(c))))
+    {
+        return std::string(1, c);
+    }
+    else
+    {
+        std::ostringstream oss;
+        oss << std::hex << std::setfill('0') << std::setw(2) << "0x"
+            << static_cast<int>(c);
+        return oss.str();
+    }
+}
+
+template<char C>
+struct character
+{
+    static constexpr char target = C;
+
+    template<typename Cont>
+    static result<region<Cont>, std::string> invoke(location<Cont>& loc)
+    {
+        static_assert(std::is_same<char, typename Cont::value_type>::value,
+                      "internal error: container::value_type should be `char`.");
+
+        if(loc.iter() == loc.end()) {return err("not sufficient characters");}
+        const auto first = loc.iter();
+
+        const char c = *(loc.iter());
+        if(c != target)
+        {
+            return err(concat_to_string("expected '", show_char(target),
+                                        "' but got '", show_char(c), "'."));
+        }
+        ++(loc.iter()); // update location
+
+        return ok(region<Cont>(loc, first, loc.iter()));
+    }
+
+    static std::string pattern() {return show_char(target);}
+};
+template<char C>
+constexpr char character<C>::target;
+
+// closed interval [Low, Up]. both Low and Up are included.
+template<char Low, char Up>
+struct in_range
+{
+    // assuming ascii part of UTF-8...
+    static_assert(Low <= Up, "lower bound should be less than upper bound.");
+
+    static constexpr char upper = Up;
+    static constexpr char lower = Low;
+
+    template<typename Cont>
+    static result<region<Cont>, std::string> invoke(location<Cont>& loc)
+    {
+        static_assert(std::is_same<char, typename Cont::value_type>::value,
+                      "internal error: container::value_type should be `char`.");
+
+        if(loc.iter() == loc.end()) {return err("not sufficient characters");}
+        const auto first = loc.iter();
+
+        const char c = *(loc.iter());
+        if(c < lower || upper < c)
+        {
+            return err(concat_to_string("expected character in range "
+                "[", show_char(lower), ", ", show_char(upper), "] but got ",
+                "'", show_char(c), "'."));
+        }
+
+        ++(loc.iter());
+        return ok(region<Cont>(loc, first, loc.iter()));
+    }
+
+    static std::string pattern()
+    {
+        return concat_to_string("[",show_char(lower),"-",show_char(upper),"]");
+    }
+};
+template<char L, char U> constexpr char in_range<L, U>::upper;
+template<char L, char U> constexpr char in_range<L, U>::lower;
+
+// keep iterator if `Combinator` matches. otherwise, increment `iter` by 1 char.
+// for detecting invalid characters, like control sequences in toml string.
+template<typename Combinator>
+struct exclude
+{
+    template<typename Cont>
+    static result<region<Cont>, std::string> invoke(location<Cont>& loc)
+    {
+        static_assert(std::is_same<char, typename Cont::value_type>::value,
+                      "internal error: container::value_type should be `char`.");
+
+        if(loc.iter() == loc.end()) {return err("not sufficient characters");}
+        auto first = loc.iter();
+
+        auto rslt = Combinator::invoke(loc);
+        if(rslt.is_ok())
+        {
+            loc.iter() = first; // rollback
+            return err(concat_to_string(
+                "invalid pattern (", Combinator::pattern(), ") appeared ",
+                rslt.unwrap().str()));
+        }
+        loc.iter() = std::next(first);
+        return ok(region<Cont>(loc, first, loc.iter()));
+    }
+
+    static std::string pattern()
+    {
+        return concat_to_string("^(", Combinator::pattern(), ')');
+    }
+};
+
+// increment `iter`, if matches. otherwise, just return empty string.
+template<typename Combinator>
+struct maybe
+{
+    template<typename Cont>
+    static result<region<Cont>, std::string> invoke(location<Cont>& loc)
+    {
+        static_assert(std::is_same<char, typename Cont::value_type>::value,
+                      "internal error: container::value_type should be `char`.");
+
+        const auto rslt = Combinator::invoke(loc);
+        if(rslt.is_ok())
+        {
+            return rslt;
+        }
+        return ok(region<Cont>(loc));
+    }
+
+    static std::string pattern()
+    {
+        return concat_to_string('(', Combinator::pattern(), ")?");
+    }
+};
+
+template<typename ... Ts>
+struct sequence;
+
+template<typename Head, typename ... Tail>
+struct sequence<Head, Tail...>
+{
+    template<typename Cont>
+    static result<region<Cont>, std::string> invoke(location<Cont>& loc)
+    {
+        static_assert(std::is_same<char, typename Cont::value_type>::value,
+                      "internal error: container::value_type should be `char`.");
+
+        const auto first = loc.iter();
+        const auto rslt = Head::invoke(loc);
+        if(rslt.is_err())
+        {
+            loc.iter() = first;
+            return err(rslt.unwrap_err());
+        }
+        return sequence<Tail...>::invoke(loc, std::move(rslt.unwrap()), first);
+    }
+
+    // called from the above function only, recursively.
+    template<typename Cont, typename Iterator>
+    static result<region<Cont>, std::string>
+    invoke(location<Cont>& loc, region<Cont> reg, Iterator first)
+    {
+        const auto rslt = Head::invoke(loc);
+        if(rslt.is_err())
+        {
+            loc.iter() = first;
+            return err(rslt.unwrap_err());
+        }
+        reg += rslt.unwrap(); // concat regions
+        return sequence<Tail...>::invoke(loc, std::move(reg), first);
+    }
+
+    static std::string pattern()
+    {
+        return concat_to_string(Head::pattern(), sequence<Tail...>::pattern());
+    }
+};
+
+template<typename Head>
+struct sequence<Head>
+{
+    // would be called from sequence<T ...>::invoke only.
+    template<typename Cont, typename Iterator>
+    static result<region<Cont>, std::string>
+    invoke(location<Cont>& loc, region<Cont> reg, Iterator first)
+    {
+        const auto rslt = Head::invoke(loc);
+        if(rslt.is_err())
+        {
+            loc.iter() = first;
+            return err(rslt.unwrap_err());
+        }
+        reg += rslt.unwrap(); // concat regions
+        return ok(reg);
+    }
+    static std::string pattern() {return Head::pattern();}
+};
+
+template<typename ... Ts>
+struct either;
+
+template<typename Head, typename ... Tail>
+struct either<Head, Tail...>
+{
+    template<typename Cont>
+    static result<region<Cont>, std::string> invoke(location<Cont>& loc)
+    {
+        static_assert(std::is_same<char, typename Cont::value_type>::value,
+                      "internal error: container::value_type should be `char`.");
+
+        const auto rslt = Head::invoke(loc);
+        if(rslt.is_ok()) {return rslt;}
+        return either<Tail...>::invoke(loc);
+    }
+
+    static std::string pattern()
+    {
+        return concat_to_string('(', Head::pattern(), ")|", either<Tail...>::pattern());
+    }
+};
+template<typename Head>
+struct either<Head>
+{
+    template<typename Cont>
+    static result<region<Cont>, std::string> invoke(location<Cont>& loc)
+    {
+        static_assert(std::is_same<char, typename Cont::value_type>::value,
+                      "internal error: container::value_type should be `char`.");
+        return Head::invoke(loc);
+    }
+    static std::string pattern()
+    {
+        return concat_to_string('(', Head::pattern(), ')');
+    }
+};
+
+template<typename T, typename N>
+struct repeat;
+
+template<std::size_t N> struct exactly{};
+template<std::size_t N> struct at_least{};
+struct unlimited{};
+
+template<typename T, std::size_t N>
+struct repeat<T, exactly<N>>
+{
+    template<typename Cont>
+    static result<region<Cont>, std::string> invoke(location<Cont>& loc)
+    {
+        region<Cont> retval(loc);
+        const auto first = loc.iter();
+        for(std::size_t i=0; i<N; ++i)
+        {
+            auto rslt = T::invoke(loc);
+            if(rslt.is_err())
+            {
+                loc.iter() = first;
+                return err(rslt.unwrap_err());
+            }
+            retval += rslt.unwrap();
+        }
+        return ok(std::move(retval));
+    }
+    static std::string pattern()
+    {
+        return concat_to_string('(', T::pattern(), "){", N, '}');
+    }
+};
+
+template<typename T, std::size_t N>
+struct repeat<T, at_least<N>>
+{
+    template<typename Cont>
+    static result<region<Cont>, std::string> invoke(location<Cont>& loc)
+    {
+        region<Cont> retval(loc);
+
+        const auto first = loc.iter();
+        for(std::size_t i=0; i<N; ++i)
+        {
+            auto rslt = T::invoke(loc);
+            if(rslt.is_err())
+            {
+                loc.iter() = first;
+                return err(rslt.unwrap_err());
+            }
+            retval += rslt.unwrap();
+        }
+        while(true)
+        {
+            auto rslt = T::invoke(loc);
+            if(rslt.is_err())
+            {
+                return ok(std::move(retval));
+            }
+            retval += rslt.unwrap();
+        }
+    }
+    static std::string pattern()
+    {
+        return concat_to_string('(',T::pattern(), "){", N, ",}");
+    }
+};
+
+template<typename T>
+struct repeat<T, unlimited>
+{
+    template<typename Cont>
+    static result<region<Cont>, std::string> invoke(location<Cont>& loc)
+    {
+        region<Cont> retval(loc);
+        while(true)
+        {
+            auto rslt = T::invoke(loc);
+            if(rslt.is_err())
+            {
+                return ok(std::move(retval));
+            }
+            retval += rslt.unwrap();
+        }
+    }
+    static std::string pattern() {return concat_to_string('(', T::pattern(), ")*");}
+};
+
+} // detail
+} // toml
+#endif// TOML11_COMBINATOR_HPP

toml/datetime.hpp

@@ -1,231 +1,540 @@
+//     Copyright Toru Niina 2017.
+// Distributed under the MIT License.
 #ifndef TOML11_DATETIME
 #define TOML11_DATETIME
 #include <chrono>
+#include <tuple>
+#include <array>
+#include <ostream>
 #include <iomanip>
+#include <cstdint>
+#include <cstdlib>
 #include <ctime>
 
 namespace toml
 {
 
-template<typename unsignedT, typename intT>
-struct basic_datetime
+enum class month_t : std::int8_t
 {
-    typedef unsignedT number_type;
-    typedef intT      offset_type;
-    constexpr static unsignedT undef    = std::numeric_limits<unsignedT>::max();
-    constexpr static intT      nooffset = std::numeric_limits<intT>::max();
+    Jan =  0,
+    Feb =  1,
+    Mar =  2,
+    Apr =  3,
+    May =  4,
+    Jun =  5,
+    Jul =  6,
+    Aug =  7,
+    Sep =  8,
+    Oct =  9,
+    Nov = 10,
+    Dec = 11
+};
 
-    unsignedT year;
-    unsignedT month;
-    unsignedT day;
-    unsignedT hour;
-    unsignedT minute;
-    unsignedT second;
-    unsignedT millisecond;
-    unsignedT microsecond;
-    intT      offset_hour;
-    intT      offset_minute;
+struct local_date
+{
+    std::int16_t year;   // A.D. (like, 2018)
+    std::uint8_t month;  // [0, 11]
+    std::uint8_t day;    // [1, 31]
 
-    basic_datetime() = default;
-    ~basic_datetime() = default;
-    basic_datetime(const basic_datetime&) = default;
-    basic_datetime(basic_datetime&&) = default;
-    basic_datetime& operator=(const basic_datetime&) = default;
-    basic_datetime& operator=(basic_datetime&&) = default;
-
-    basic_datetime(unsignedT y, unsignedT m, unsignedT d)
-        : year(y), month(m), day(d), hour(undef), minute(undef), second(undef),
-          millisecond(undef), microsecond(undef),
-          offset_hour(nooffset), offset_minute(nooffset)
-    {}
-    basic_datetime(unsignedT h, unsignedT m, unsignedT s,
-                   unsignedT ms, unsignedT us)
-        : year(undef), month(undef), day(undef), hour(h), minute(m), second(s),
-          millisecond(ms), microsecond(us),
-          offset_hour(nooffset), offset_minute(nooffset)
-    {}
-    basic_datetime(unsignedT y, unsignedT mth, unsignedT d,
-                   unsignedT h, unsignedT min, unsignedT s,
-                   unsignedT ms, unsignedT us)
-        : year(y), month(mth), day(d), hour(h), minute(min), second(s),
-          millisecond(ms), microsecond(us),
-          offset_hour(nooffset), offset_minute(nooffset)
-    {}
-    basic_datetime(unsignedT y, unsignedT mth, unsignedT d,
-                   unsignedT h, unsignedT min, unsignedT s,
-                   unsignedT ss, unsignedT us, intT oh, intT om)
-        : year(y), month(mth), day(d), hour(h), minute(min), second(s),
-          millisecond(ss), microsecond(us), offset_hour(oh), offset_minute(om)
+    local_date(int y, month_t m, int d)
+        : year (static_cast<std::int16_t>(y)),
+          month(static_cast<std::uint8_t>(m)),
+          day  (static_cast<std::uint8_t>(d))
     {}
 
-    basic_datetime(std::chrono::system_clock::time_point tp);
-    basic_datetime(std::time_t t);
+    explicit local_date(const std::tm& t)
+        : year (static_cast<std::int16_t>(t.tm_year + 1900)),
+          month(static_cast<std::uint8_t>(t.tm_mon)),
+          day  (static_cast<std::uint8_t>(t.tm_mday))
+    {}
+
+    explicit local_date(const std::chrono::system_clock::time_point& tp)
+    {
+        const auto t = std::chrono::system_clock::to_time_t(tp);
+        const auto tmp = std::localtime(&t); //XXX: not threadsafe!
+        assert(tmp); // if std::localtime fails, tmp is nullptr
+        const std::tm time = *tmp;
+        *this = local_date(time);
+    }
+
+    explicit local_date(const std::time_t t)
+        : local_date(std::chrono::system_clock::from_time_t(t))
+    {}
 
     operator std::chrono::system_clock::time_point() const
     {
-        std::tm time;
-        if(this->year == undef || this->month == undef || this->day == undef)
-        {
-            const auto now = std::chrono::system_clock::now();
-            const auto t = std::chrono::system_clock::to_time_t(now);
-            std::tm* t_ = std::localtime(&t);
-            time.tm_year = t_->tm_year;
-            time.tm_mon  = t_->tm_mon;
-            time.tm_mday = t_->tm_mday;
-        }
-        else
-        {
-            time.tm_year = this->year - 1900;
-            time.tm_mon  = this->month - 1;
-            time.tm_mday = this->day;
-        }
-        time.tm_hour = (this->hour   == undef) ? 0 : this->hour;
-        time.tm_min  = (this->minute == undef) ? 0 : this->minute;
-        time.tm_sec  = (this->second == undef) ? 0 : this->second;
-
-        auto tp = std::chrono::system_clock::from_time_t(std::mktime(&time));
-        tp += std::chrono::milliseconds(this->millisecond);
-        tp += std::chrono::microseconds(this->microsecond);
-        // mktime regards the tm struct as localtime. so adding offset is not needed.
-
-        return tp;
+        // std::mktime returns date as local time zone. no conversion needed
+        std::tm t;
+        t.tm_sec   = 0;
+        t.tm_min   = 0;
+        t.tm_hour  = 0;
+        t.tm_mday  = this->day;
+        t.tm_mon   = this->month;
+        t.tm_year  = this->year - 1900;
+        t.tm_wday  = 0; // the value will be ignored
+        t.tm_yday  = 0; // the value will be ignored
+        t.tm_isdst = -1;
+        return std::chrono::system_clock::from_time_t(std::mktime(&t));
     }
+
     operator std::time_t() const
     {
         return std::chrono::system_clock::to_time_t(
-               std::chrono::system_clock::time_point(*this));
+                std::chrono::system_clock::time_point(*this));
     }
+
+    local_date() = default;
+    ~local_date() = default;
+    local_date(local_date const&) = default;
+    local_date(local_date&&)      = default;
+    local_date& operator=(local_date const&) = default;
+    local_date& operator=(local_date&&)      = default;
 };
 
-template<typename uT, typename iT>
-basic_datetime<uT, iT>::basic_datetime(std::chrono::system_clock::time_point tp)
+inline bool operator==(const local_date& lhs, const local_date& rhs)
 {
-    const auto t = std::chrono::system_clock::to_time_t(tp);
-    std::tm *time = std::localtime(&t);
-    this->year   = time->tm_year + 1900;
-    this->month  = time->tm_mon + 1;
-    this->day    = time->tm_mday;
-    this->hour   = time->tm_hour;
-    this->minute = time->tm_min;
-    this->second = time->tm_sec;
-    auto t_ = std::chrono::system_clock::from_time_t(std::mktime(time));
-    auto diff = tp - t_;
-    this->millisecond = std::chrono::duration_cast<std::chrono::milliseconds
-        >(diff).count() % 1000;
-    this->microsecond = std::chrono::duration_cast<std::chrono::microseconds
-        >(diff).count() % 1000;
-
-    std::tm *utc = std::gmtime(&t);
-    int total_offset = (this->hour   - utc->tm_hour) * 60 +
-                       (this->minute - utc->tm_min);
-         if(total_offset >  720) total_offset -= 1440;
-    else if(total_offset < -720) total_offset += 1440;
-    offset_hour   = total_offset / 60;
-    offset_minute = total_offset - (offset_hour * 60);
+    return std::make_tuple(lhs.year, lhs.month, lhs.day) ==
+           std::make_tuple(rhs.year, rhs.month, rhs.day);
+}
+inline bool operator!=(const local_date& lhs, const local_date& rhs)
+{
+    return !(lhs == rhs);
+}
+inline bool operator< (const local_date& lhs, const local_date& rhs)
+{
+    return std::make_tuple(lhs.year, lhs.month, lhs.day) <
+           std::make_tuple(rhs.year, rhs.month, rhs.day);
+}
+inline bool operator<=(const local_date& lhs, const local_date& rhs)
+{
+    return (lhs < rhs) || (lhs == rhs);
+}
+inline bool operator> (const local_date& lhs, const local_date& rhs)
+{
+    return !(lhs <= rhs);
+}
+inline bool operator>=(const local_date& lhs, const local_date& rhs)
+{
+    return !(lhs < rhs);
 }
 
-template<typename uT, typename iT>
-basic_datetime<uT, iT>::basic_datetime(std::time_t t)
-{
-    *this = basic_datetime(std::chrono::system_clock::from_time_t(t));
-}
-
-
-template<typename charT, typename traits, typename uT, typename iT>
+template<typename charT, typename traits>
 std::basic_ostream<charT, traits>&
-operator<<(std::basic_ostream<charT, traits>& os, basic_datetime<uT, iT> const& dt)
+operator<<(std::basic_ostream<charT, traits>& os, const local_date& date)
 {
-    bool date = false;
-    if(dt.year  != basic_datetime<uT, iT>::undef &&
-       dt.month != basic_datetime<uT, iT>::undef &&
-       dt.day   != basic_datetime<uT, iT>::undef)
+    os << std::setfill('0') << std::setw(4) << static_cast<int>(date.year     ) << '-';
+    os << std::setfill('0') << std::setw(2) << static_cast<int>(date.month + 1) << '-';
+    os << std::setfill('0') << std::setw(2) << static_cast<int>(date.day      );
+    return os;
+}
+
+struct local_time
+{
+    std::uint8_t  hour;        // [0, 23]
+    std::uint8_t  minute;      // [0, 59]
+    std::uint8_t  second;      // [0, 60]
+    std::uint16_t millisecond; // [0, 999]
+    std::uint16_t microsecond; // [0, 999]
+    std::uint16_t nanosecond;  // [0, 999]
+
+    local_time(int h, int m, int s,
+               int ms = 0, int us = 0, int ns = 0)
+        : hour  (static_cast<std::uint8_t>(h)),
+          minute(static_cast<std::uint8_t>(m)),
+          second(static_cast<std::uint8_t>(s)),
+          millisecond(static_cast<std::uint16_t>(ms)),
+          microsecond(static_cast<std::uint16_t>(us)),
+          nanosecond (static_cast<std::uint16_t>(ns))
+    {}
+
+    explicit local_time(const std::tm& t)
+        : hour  (static_cast<std::uint8_t>(t.tm_hour)),
+          minute(static_cast<std::uint8_t>(t.tm_min)),
+          second(static_cast<std::uint8_t>(t.tm_sec)),
+          millisecond(0), microsecond(0), nanosecond(0)
+    {}
+
+    template<typename Rep, typename Period>
+    explicit local_time(const std::chrono::duration<Rep, Period>& t)
     {
-        os << std::setfill('0') << std::setw(4) << dt.year << '-'
-           << std::setfill('0') << std::setw(2) << dt.month << '-'
-           << std::setfill('0') << std::setw(2) << dt.day;
-        date = true;
+        const auto h = std::chrono::duration_cast<std::chrono::hours>(t);
+        this->hour = h.count();
+        const auto t2 = t - h;
+        const auto m = std::chrono::duration_cast<std::chrono::minutes>(t2);
+        this->minute = m.count();
+        const auto t3 = t2 - m;
+        const auto s = std::chrono::duration_cast<std::chrono::seconds>(t3);
+        this->second = s.count();
+        const auto t4 = t3 - s;
+        const auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(t4);
+        this->millisecond = ms.count();
+        const auto t5 = t4 - ms;
+        const auto us = std::chrono::duration_cast<std::chrono::microseconds>(t5);
+        this->microsecond = us.count();
+        const auto t6 = t5 - us;
+        const auto ns = std::chrono::duration_cast<std::chrono::nanoseconds>(t6);
+        this->nanosecond = ns.count();
     }
-    if(dt.hour   != basic_datetime<uT, iT>::undef &&
-       dt.minute != basic_datetime<uT, iT>::undef &&
-       dt.second != basic_datetime<uT, iT>::undef)
+
+    operator std::chrono::nanoseconds() const
     {
-        if(date) os << 'T';
-        os << std::setfill('0') << std::setw(2) << dt.hour   << ':'
-           << std::setfill('0') << std::setw(2) << dt.minute << ':'
-           << std::setfill('0') << std::setw(2) << dt.second << '.'
-           << std::setfill('0') << std::setw(3) << dt.millisecond
-           << std::setfill('0') << std::setw(3) << dt.microsecond;
+        return std::chrono::nanoseconds (this->nanosecond)  +
+               std::chrono::microseconds(this->microsecond) +
+               std::chrono::milliseconds(this->millisecond) +
+               std::chrono::seconds(this->second) +
+               std::chrono::minutes(this->minute) +
+               std::chrono::hours(this->hour);
     }
-    if(dt.offset_hour   != basic_datetime<uT, iT>::nooffset &&
-       dt.offset_minute != basic_datetime<uT, iT>::nooffset)
+
+    local_time() = default;
+    ~local_time() = default;
+    local_time(local_time const&) = default;
+    local_time(local_time&&)      = default;
+    local_time& operator=(local_time const&) = default;
+    local_time& operator=(local_time&&)      = default;
+};
+
+inline bool operator==(const local_time& lhs, const local_time& rhs)
+{
+    return std::make_tuple(lhs.hour, lhs.minute, lhs.second, lhs.millisecond, lhs.microsecond, lhs.nanosecond) ==
+           std::make_tuple(rhs.hour, rhs.minute, rhs.second, rhs.millisecond, rhs.microsecond, rhs.nanosecond);
+}
+inline bool operator!=(const local_time& lhs, const local_time& rhs)
+{
+    return !(lhs == rhs);
+}
+inline bool operator< (const local_time& lhs, const local_time& rhs)
+{
+    return std::make_tuple(lhs.hour, lhs.minute, lhs.second, lhs.millisecond, lhs.microsecond, lhs.nanosecond) <
+           std::make_tuple(rhs.hour, rhs.minute, rhs.second, rhs.millisecond, rhs.microsecond, rhs.nanosecond);
+}
+inline bool operator<=(const local_time& lhs, const local_time& rhs)
+{
+    return (lhs < rhs) || (lhs == rhs);
+}
+inline bool operator> (const local_time& lhs, const local_time& rhs)
+{
+    return !(lhs <= rhs);
+}
+inline bool operator>=(const local_time& lhs, const local_time& rhs)
+{
+    return !(lhs < rhs);
+}
+
+template<typename charT, typename traits>
+std::basic_ostream<charT, traits>&
+operator<<(std::basic_ostream<charT, traits>& os, const local_time& time)
+{
+    os << std::setfill('0') << std::setw(2) << static_cast<int>(time.hour  ) << ':';
+    os << std::setfill('0') << std::setw(2) << static_cast<int>(time.minute) << ':';
+    os << std::setfill('0') << std::setw(2) << static_cast<int>(time.second);
+    if(time.millisecond != 0 || time.microsecond != 0 || time.nanosecond != 0)
     {
-        if(dt.offset_hour == 0 && dt.offset_minute == 0)
+        os << '.';
+        os << std::setfill('0') << std::setw(3) << static_cast<int>(time.millisecond);
+        if(time.microsecond != 0 || time.nanosecond != 0)
         {
-            os << 'Z';
-        }
-        else
-        {
-            char sign = ' ';
-            iT oh = dt.offset_hour;
-            iT om = dt.offset_minute;
-            om += oh * 60;
-            if(om > 0) sign = '+'; else sign='-';
-            oh =  om / 60;
-            om -= oh * 60;
-            os << sign << std::setfill('0') << std::setw(2) << std::abs(oh) << ':'
-                       << std::setfill('0') << std::setw(2) << std::abs(om);
+            os << std::setfill('0') << std::setw(3) << static_cast<int>(time.microsecond);
+            if(time.nanosecond != 0)
+            {
+                os << std::setfill('0') << std::setw(3) << static_cast<int>(time.nanosecond);
+            }
         }
     }
     return os;
 }
 
-template<typename uT, typename iT>
-inline bool
-operator==(basic_datetime<uT, iT> const& lhs, basic_datetime<uT, iT> const& rhs)
+struct time_offset
 {
-    return lhs.year   == rhs.year   && lhs.month  == rhs.month  &&
-           lhs.day    == rhs.day    && lhs.minute == rhs.minute &&
-           lhs.second == rhs.second && lhs.millisecond == rhs.millisecond &&
-           lhs.microsecond == rhs.microsecond &&
-           lhs.offset_hour == rhs.offset_hour &&
-           lhs.offset_minute == rhs.offset_minute;
-}
+    std::int8_t hour;   // [-12, 12]
+    std::int8_t minute; // [-59, 59]
 
-template<typename uT, typename iT>
-inline bool
-operator!=(basic_datetime<uT, iT> const& lhs, basic_datetime<uT, iT> const& rhs)
+    time_offset(int h, int m)
+        : hour  (static_cast<std::int8_t>(h)),
+          minute(static_cast<std::int8_t>(m))
+    {}
+
+    operator std::chrono::minutes() const
+    {
+        return std::chrono::minutes(this->minute) +
+               std::chrono::hours(this->hour);
+    }
+
+    time_offset() = default;
+    ~time_offset() = default;
+    time_offset(time_offset const&) = default;
+    time_offset(time_offset&&)      = default;
+    time_offset& operator=(time_offset const&) = default;
+    time_offset& operator=(time_offset&&)      = default;
+};
+
+inline bool operator==(const time_offset& lhs, const time_offset& rhs)
+{
+    return std::make_tuple(lhs.hour, lhs.minute) ==
+           std::make_tuple(rhs.hour, rhs.minute);
+}
+inline bool operator!=(const time_offset& lhs, const time_offset& rhs)
 {
     return !(lhs == rhs);
 }
-
-template<typename uT, typename iT>
-inline bool
-operator<(basic_datetime<uT, iT> const& lhs, basic_datetime<uT, iT> const& rhs)
+inline bool operator< (const time_offset& lhs, const time_offset& rhs)
 {
-    return std::time_t(lhs) < std::time_t(rhs);
+    return std::make_tuple(lhs.hour, lhs.minute) <
+           std::make_tuple(rhs.hour, rhs.minute);
+}
+inline bool operator<=(const time_offset& lhs, const time_offset& rhs)
+{
+    return (lhs < rhs) || (lhs == rhs);
+}
+inline bool operator> (const time_offset& lhs, const time_offset& rhs)
+{
+    return !(lhs <= rhs);
+}
+inline bool operator>=(const time_offset& lhs, const time_offset& rhs)
+{
+    return !(lhs < rhs);
 }
 
-template<typename uT, typename iT>
-inline bool
-operator<=(basic_datetime<uT, iT> const& lhs, basic_datetime<uT, iT> const& rhs)
+template<typename charT, typename traits>
+std::basic_ostream<charT, traits>&
+operator<<(std::basic_ostream<charT, traits>& os, const time_offset& offset)
 {
-    return std::time_t(lhs) <= std::time_t(rhs);
+    if(offset.hour == 0 && offset.minute == 0)
+    {
+        os << 'Z';
+        return os;
+    }
+    if(static_cast<int>(offset.hour) * static_cast<int>(offset.minute) < 0)
+    {
+        const int min = static_cast<int>(offset.hour) * 60 + offset.minute;
+        if(min < 0){os << '-';} else {os << '+';}
+        os << std::setfill('0') << std::setw(2) << min / 60 << ':';
+        os << std::setfill('0') << std::setw(2) << min % 60;
+        return os;
+    }
+    if(offset.hour < 0){os << '-';} else {os << '+';}
+    os << std::setfill('0') << std::setw(2) << static_cast<int>(offset.hour) << ':';
+    os << std::setfill('0') << std::setw(2) << static_cast<int>(offset.minute);
+    return os;
 }
 
-template<typename uT, typename iT>
-inline bool
-operator>(basic_datetime<uT, iT> const& lhs, basic_datetime<uT, iT> const& rhs)
+struct local_datetime
 {
-    return std::time_t(lhs) > std::time_t(rhs);
+    local_date date;
+    local_time time;
+
+    local_datetime(local_date d, local_time t): date(d), time(t) {}
+
+    explicit local_datetime(const std::tm& t): date(t), time(t){}
+
+    explicit local_datetime(const std::chrono::system_clock::time_point& tp)
+    {
+        const auto t = std::chrono::system_clock::to_time_t(tp);
+        const auto tmp = std::localtime(&t); //XXX: not threadsafe!
+        assert(tmp); // if std::localtime fails, tmp is nullptr
+
+        std::tm time = *tmp;
+        this->date = local_date(time);
+        this->time = local_time(time);
+
+        // std::tm lacks subsecond information, so diff between tp and tm
+        // can be used to get millisecond & microsecond information.
+        const auto t_diff = tp -
+            std::chrono::system_clock::from_time_t(std::mktime(&time));
+        this->time.millisecond = std::chrono::duration_cast<
+            std::chrono::milliseconds>(t_diff).count();
+        this->time.microsecond = std::chrono::duration_cast<
+            std::chrono::microseconds>(t_diff).count();
+        this->time.nanosecond = std::chrono::duration_cast<
+            std::chrono::nanoseconds >(t_diff).count();
+    }
+
+    explicit local_datetime(const std::time_t t)
+        : local_datetime(std::chrono::system_clock::from_time_t(t))
+    {}
+
+    operator std::chrono::system_clock::time_point() const
+    {
+        using internal_duration =
+            typename std::chrono::system_clock::time_point::duration;
+        // std::mktime returns date as local time zone. no conversion needed
+        auto dt = std::chrono::system_clock::time_point(this->date);
+        dt += std::chrono::duration_cast<internal_duration>(
+                   std::chrono::nanoseconds(this->time));
+        return dt;
+    }
+
+    operator std::time_t() const
+    {
+        return std::chrono::system_clock::to_time_t(
+                std::chrono::system_clock::time_point(*this));
+    }
+
+    local_datetime() = default;
+    ~local_datetime() = default;
+    local_datetime(local_datetime const&) = default;
+    local_datetime(local_datetime&&)      = default;
+    local_datetime& operator=(local_datetime const&) = default;
+    local_datetime& operator=(local_datetime&&)      = default;
+};
+
+inline bool operator==(const local_datetime& lhs, const local_datetime& rhs)
+{
+    return std::make_tuple(lhs.date, lhs.time) ==
+           std::make_tuple(rhs.date, rhs.time);
+}
+inline bool operator!=(const local_datetime& lhs, const local_datetime& rhs)
+{
+    return !(lhs == rhs);
+}
+inline bool operator< (const local_datetime& lhs, const local_datetime& rhs)
+{
+    return std::make_tuple(lhs.date, lhs.time) <
+           std::make_tuple(rhs.date, rhs.time);
+}
+inline bool operator<=(const local_datetime& lhs, const local_datetime& rhs)
+{
+    return (lhs < rhs) || (lhs == rhs);
+}
+inline bool operator> (const local_datetime& lhs, const local_datetime& rhs)
+{
+    return !(lhs <= rhs);
+}
+inline bool operator>=(const local_datetime& lhs, const local_datetime& rhs)
+{
+    return !(lhs < rhs);
 }
 
-template<typename uT, typename iT>
-inline bool
-operator>=(basic_datetime<uT, iT> const& lhs, basic_datetime<uT, iT> const& rhs)
+template<typename charT, typename traits>
+std::basic_ostream<charT, traits>&
+operator<<(std::basic_ostream<charT, traits>& os, const local_datetime& dt)
 {
-    return std::time_t(lhs) >= std::time_t(rhs);
+    os << dt.date << 'T' << dt.time;
+    return os;
 }
 
+struct offset_datetime
+{
+    local_date  date;
+    local_time  time;
+    time_offset offset;
+
+    offset_datetime(local_date d, local_time t, time_offset o)
+        : date(d), time(t), offset(o)
+    {}
+    offset_datetime(const local_datetime& dt, time_offset o)
+        : date(dt.date), time(dt.time), offset(o)
+    {}
+    explicit offset_datetime(const local_datetime& ld)
+        : date(ld.date), time(ld.time), offset(get_local_offset())
+    {}
+    explicit offset_datetime(const std::chrono::system_clock::time_point& tp)
+        : offset_datetime(local_datetime(tp))
+    {}
+    explicit offset_datetime(const std::time_t& t)
+        : offset_datetime(local_datetime(t))
+    {}
+    explicit offset_datetime(const std::tm& t)
+        : offset_datetime(local_datetime(t))
+    {}
+
+    operator std::chrono::system_clock::time_point() const
+    {
+        // get date-time
+        using internal_duration =
+            typename std::chrono::system_clock::time_point::duration;
+        std::chrono::system_clock::time_point tp =
+            std::chrono::system_clock::time_point(this->date) +
+            std::chrono::duration_cast<internal_duration>(
+                   std::chrono::nanoseconds(this->time));
+
+        // get date-time in UTC. let's say we are in +09:00 (JPN).
+        // writing 12:00:00 in +09:00 means 03:00:00Z. to represent
+        // 12:00:00Z, first we need to add +09:00.
+        const auto ofs = get_local_offset();
+        tp += std::chrono::hours  (ofs.hour);
+        tp += std::chrono::minutes(ofs.minute);
+
+        // here, tp represents 12:00:00 in UTC but we have offset information.
+        // we need to subtract it. For example, let's say the input is
+        // 12:00:00-08:00. now we have tp = 12:00:00Z as a result of the above
+        // conversion. But the actual time we need to return is 20:00:00Z
+        // because of -08:00.
+        tp -= std::chrono::minutes(this->offset);
+        return tp;
+    }
+
+    operator std::time_t() const
+    {
+        return std::chrono::system_clock::to_time_t(
+                std::chrono::system_clock::time_point(*this));
+    }
+
+    offset_datetime() = default;
+    ~offset_datetime() = default;
+    offset_datetime(offset_datetime const&) = default;
+    offset_datetime(offset_datetime&&)      = default;
+    offset_datetime& operator=(offset_datetime const&) = default;
+    offset_datetime& operator=(offset_datetime&&)      = default;
+
+  private:
+
+    static time_offset get_local_offset()
+    {
+         // get current timezone
+        const auto  tmp1 = std::time(nullptr);
+        const auto  tmp2 = std::localtime(&tmp1); // XXX not threadsafe!
+        assert(tmp2);
+        std::tm t = *tmp2;
+
+        std::array<char, 6> buf;
+        const auto result = std::strftime(buf.data(), 6, "%z", &t); // +hhmm\0
+        if(result != 5)
+        {
+            throw std::runtime_error("toml::offset_datetime: cannot obtain "
+                                     "timezone information of current env");
+        }
+        const int ofs = std::atoi(buf.data());
+        const int ofs_h = ofs / 100;
+        const int ofs_m = ofs - (ofs_h * 100);
+        return time_offset(ofs_h, ofs_m);
+    }
+};
+
+inline bool operator==(const offset_datetime& lhs, const offset_datetime& rhs)
+{
+    return std::make_tuple(lhs.date, lhs.time, lhs.offset) ==
+           std::make_tuple(rhs.date, rhs.time, rhs.offset);
+}
+inline bool operator!=(const offset_datetime& lhs, const offset_datetime& rhs)
+{
+    return !(lhs == rhs);
+}
+inline bool operator< (const offset_datetime& lhs, const offset_datetime& rhs)
+{
+    return std::make_tuple(lhs.date, lhs.time, lhs.offset) <
+           std::make_tuple(rhs.date, rhs.time, rhs.offset);
+}
+inline bool operator<=(const offset_datetime& lhs, const offset_datetime& rhs)
+{
+    return (lhs < rhs) || (lhs == rhs);
+}
+inline bool operator> (const offset_datetime& lhs, const offset_datetime& rhs)
+{
+    return !(lhs <= rhs);
+}
+inline bool operator>=(const offset_datetime& lhs, const offset_datetime& rhs)
+{
+    return !(lhs < rhs);
+}
+
+template<typename charT, typename traits>
+std::basic_ostream<charT, traits>&
+operator<<(std::basic_ostream<charT, traits>& os, const offset_datetime& dt)
+{
+    os << dt.date << 'T' << dt.time << dt.offset;
+    return os;
+}
 
 }//toml
 #endif// TOML11_DATETIME

toml/exception.hpp

@@ -1,3 +1,5 @@
+//     Copyright Toru Niina 2017.
+// Distributed under the MIT License.
 #ifndef TOML11_EXCEPTION
 #define TOML11_EXCEPTION
 #include <stdexcept>

toml/format.hpp

@@ -1,386 +0,0 @@
-#ifndef TOML11_FORMAT
-#define TOML11_FORMAT
-#include "value.hpp"
-#include <type_traits>
-#include <iostream>
-#include <sstream>
-#include <iomanip>
-#include <locale>
-
-namespace toml
-{
-
-// synopsis
-// toml::format("key", value, toml::make_inline(80))
-// toml::format("key", value, toml::forceinline)
-// std::cout << toml::make_inline(80) << value;
-// std::cout << toml::forceinline << value;
-
-template<typename traits = std::char_traits<toml::character>,
-         typename alloc = std::allocator<toml::character>>
-std::basic_string<toml::character, traits, alloc>
-format(const value& v);
-
-template<typename traits = std::char_traits<toml::character>,
-         typename alloc = std::allocator<toml::character>>
-std::basic_string<toml::character, traits, alloc>
-format(const value& v, std::size_t mk);
-
-template<typename traits = std::char_traits<toml::character>,
-         typename alloc = std::allocator<toml::character>>
-std::basic_string<toml::character, traits, alloc>
-format(const toml::key& k, const value& v);
-
-template<typename traits = std::char_traits<toml::character>,
-         typename alloc = std::allocator<toml::character>>
-std::basic_string<toml::character, traits, alloc>
-format(const toml::key& k, const value& v, std::size_t mk);
-
-template<value_t Type>
-struct format_impl;
-
-template<> struct format_impl<value_t::Boolean>
-{
-    typedef detail::toml_default_type<value_t::Boolean>::type type;
-
-    std::basic_string<toml::character>
-    operator()(const type& val)
-    {
-        return val ? "true" : "false";
-    }
-};
-
-template<> struct format_impl<value_t::Integer>
-{
-    typedef detail::toml_default_type<value_t::Integer>::type type;
-
-    std::basic_string<toml::character>
-    operator()(const type& val)
-    {
-        return std::to_string(val);
-    }
-};
-
-template<> struct format_impl<value_t::Float>
-{
-    typedef detail::toml_default_type<value_t::Float>::type type;
-
-    std::basic_string<toml::character>
-    operator()(const type& val)
-    {
-        std::basic_ostringstream<toml::character> oss;
-        oss << std::showpoint << val;
-        if(oss.str().back() == '.') oss << '0';
-        return oss.str();
-    }
-};
-
-template<> struct format_impl<value_t::String>
-{
-    typedef detail::toml_default_type<value_t::String>::type type;
-
-    std::size_t max_length;
-
-    format_impl() : max_length(80){}
-    format_impl(std::size_t mx) : max_length(mx){}
-
-    std::basic_string<toml::character>
-    operator()(const type& val)
-    {
-        auto tmp = make_inline(val);
-        if(max_length == std::numeric_limits<std::size_t>::max() ||
-           tmp.size() <= max_length) return tmp;
-        return convert_multiline(std::move(tmp));
-    }
-
-  private:
-
-    std::basic_string<toml::character>
-    make_inline(const std::basic_string<toml::character>& val)
-    {
-        std::basic_string<toml::character> str;
-        str += '"';
-        for(const auto& c : val)
-        {
-            if('\0' < c && c < '\31')
-            {
-                switch(c)
-                {
-                    case '\b': str += "\\b"; break;
-                    case '\t': str += "\\t"; break;
-                    case '\n': str += "\\n"; break;
-                    case '\f': str += "\\f"; break;
-                    case '\r': str += "\\r"; break;
-                    default:
-                    {
-                        str += 'u';
-                        std::basic_ostringstream<toml::character> oss;
-                        oss << std::setw(4) << std::setfill('0') << std::hex
-                            << static_cast<std::int8_t>(c);
-                        auto hexdig = oss.str();
-                        std::transform(hexdig.begin(), hexdig.end(), hexdig.begin(), ::toupper);
-                        str += oss.str();
-                        break;
-                    }
-                }
-            }
-            else if(c == '"')
-            {
-                str += "\\\"";
-            }
-            else if(c == '\\')
-            {
-                str += "\\\\";
-            }
-            else
-            {
-                str += c;
-            }
-        }
-        str += '"';
-        return str;
-    }
-
-    std::basic_string<toml::character>
-    convert_multiline(std::basic_string<toml::character>&& val)
-    {
-        std::basic_string<toml::character> str; str.reserve(val.size() + 6);
-        str += "\"\"\"\n";
-        std::size_t current = 0;
-        for(auto iter = val.begin()+1; iter != val.end()-1; ++iter)
-        {
-            if(*iter != '\\')
-            {
-                if(current + 1 == max_length) str += "\\\n";
-                str += *iter; continue;
-            }
-            assert(std::next(iter) < val.end()-1);
-            if(*std::next(iter) == 'u')
-            {
-                if(current + 5 == max_length) str += "\\\n";
-                assert(iter + 5 < val.end()-1);
-                str += *iter; ++iter;  // u
-                str += *iter; ++iter;  // 0
-                str += *iter; ++iter;  // 1
-                str += *iter; ++iter;  // 2
-                str += *iter; continue;// 3
-            }
-            if(current + 2 == max_length) str += "\\\n";
-            str += *iter; ++iter; str += *iter;
-        }
-        str += "\"\"\"";
-        return str;
-    }
-
-};
-
-template<> struct format_impl<value_t::Datetime>
-{
-    typedef detail::toml_default_type<value_t::Datetime>::type type;
-
-    std::basic_string<toml::character>
-    operator()(const type& val)
-    {
-        std::basic_ostringstream<toml::character> oss;
-        oss << val;
-        return oss.str();
-    }
-};
-
-// TODO max length!
-template<> struct format_impl<value_t::Array>
-{
-    typedef detail::toml_default_type<value_t::Array>::type type;
-
-    std::size_t max_length;
-
-    format_impl() : max_length(80){}
-    format_impl(std::size_t mx) : max_length(mx){}
-
-    std::basic_string<toml::character>
-    operator()(const type& val)
-    {
-        std::basic_string<toml::character> retval;
-        retval += '[';
-        for(const auto& item : val)
-        {
-            auto tmp = format(val, max_length - 1);
-            retval += tmp;
-            retval += ", ";
-            if(tmp.size() * 2 > max_length) retval += '\n';
-        }
-        retval += ']';
-        return retval;
-    }
-};
-
-// TODO max length && inline!
-template<> struct format_impl<value_t::Table>
-{
-    typedef detail::toml_default_type<value_t::Table>::type type;
-
-    std::size_t max_length;
-
-    format_impl() : max_length(80){}
-    format_impl(std::size_t mx) : max_length(mx){}
-
-    std::basic_string<toml::character>
-    operator()(const type& val)
-    {
-        std::basic_string<toml::character> retval;
-        for(const auto& item : val)
-        {
-            retval += item.first;
-            retval += " = ";
-            retval += format(item.second);
-            retval += '\n';
-        }
-        return retval;
-    }
-};
-
-template<typename traits, typename alloc>
-std::basic_string<toml::character, traits, alloc>
-format(const value& v)
-{
-    switch(v.type())
-    {
-        case value_t::Boolean : return format_impl<value_t::Boolean >{}(v.template cast<value_t::Boolean >());
-        case value_t::Integer : return format_impl<value_t::Integer >{}(v.template cast<value_t::Integer >());
-        case value_t::Float   : return format_impl<value_t::Float   >{}(v.template cast<value_t::Float   >());
-        case value_t::String  : return format_impl<value_t::String  >{}(v.template cast<value_t::String  >());
-        case value_t::Datetime: return format_impl<value_t::Datetime>{}(v.template cast<value_t::Datetime>());
-        case value_t::Array   : return format_impl<value_t::Array   >{}(v.template cast<value_t::Array   >());
-        case value_t::Table   : return format_impl<value_t::Table   >{}(v.template cast<value_t::Table   >());
-        case value_t::Empty   : throw std::runtime_error("toml::format: empty value");
-        case value_t::Unknown : throw std::runtime_error("toml::format: unknown value");
-        default: throw std::logic_error("toml::format: unknown enum value");
-    }
-}
-
-template<typename traits, typename alloc>
-std::basic_string<toml::character, traits, alloc>
-format(const value& v, std::size_t inl)
-{
-    switch(v.type())
-    {
-        case value_t::Boolean : return format_impl<value_t::Boolean >{}(v.template cast<value_t::Boolean>());
-        case value_t::Integer : return format_impl<value_t::Integer >{}(v.template cast<value_t::Integer>());
-        case value_t::Float   : return format_impl<value_t::Float   >{}(v.template cast<value_t::Float>());
-        case value_t::String  : return format_impl<value_t::String  >{inl}(v.template cast<value_t::String>());
-        case value_t::Datetime: return format_impl<value_t::Datetime>{}(v.template cast<value_t::Datetime>());
-        case value_t::Array   : return format_impl<value_t::Array   >{inl}(v.template cast<value_t::Array>());
-        case value_t::Table   : return format_impl<value_t::Table   >{inl}(v.template cast<value_t::Table>());
-        case value_t::Empty   : throw std::runtime_error("toml::format: empty value");
-        case value_t::Unknown : throw std::runtime_error("toml::format: unknown value");
-        default: throw std::logic_error("toml::format: unknown enum value");
-    }
-}
-
-template<typename traits, typename alloc>
-std::basic_string<toml::character, traits, alloc>
-format(std::basic_string<toml::character, traits, alloc> key, const value& val)
-{
-    std::basic_string<toml::character, traits, alloc> retval(std::move(key));
-    retval += " = ";
-    retval += format(val);
-    return retval;
-}
-
-template<typename traits, typename alloc>
-std::basic_string<toml::character, traits, alloc>
-format(std::basic_string<toml::character, traits, alloc> key, const value& val, std::size_t mk)
-{
-    std::basic_string<toml::character, traits, alloc> retval(std::move(key));
-    retval += " = ";
-    retval += format(val, mk);
-    return retval;
-}
-
-
-// ----------------------------- stream operators -----------------------------
-
-namespace detail
-{
-
-template<typename T = std::size_t>
-struct inline_limit
-{
-    static_assert(std::is_same<T, std::size_t>::value, "do not instantiate this");
-    static const int index;
-    T limit;
-    inline_limit() = default;
-    ~inline_limit() = default;
-    constexpr inline_limit(T i): limit(i){}
-    constexpr operator T() const {return limit;}
-
-    static void callback(std::ios_base::event ev, std::ios_base& ios, int idx)
-    {
-        void*& info = ios.pword(idx);
-        switch (ev)
-        {
-            case std::ios_base::erase_event:
-            {
-                delete static_cast<std::size_t*>(info);
-                break;
-            }
-            case std::ios_base::copyfmt_event:
-            {
-                info = new std::size_t(*static_cast<std::size_t*>(info));
-                break;
-            }
-            case std::ios_base::imbue_event:
-            {
-                break;
-            }
-        }
-    }
-};
-
-template<typename T>
-const int inline_limit<T>::index = std::ios_base::xalloc();
-
-} //detail
-
-template<typename sizeT, typename traits = std::char_traits<toml::character>>
-std::basic_ostream<toml::character, traits>&
-operator<<(std::basic_ostream<toml::character, traits>& os,
-           const detail::inline_limit<sizeT>& inl)
-{
-    void*& info = os.pword(detail::inline_limit<sizeT>::index);
-    if(!os.bad())
-    {
-        if(info == nullptr)
-        {
-            os.register_callback(detail::inline_limit<sizeT>::callback,
-                                 detail::inline_limit<sizeT>::index);
-            info = new std::size_t(inl.limit);
-        }
-        else
-        {
-            *static_cast<std::size_t*>(info) = inl.limit;
-        }
-    }
-    return os;
-}
-
-constexpr static detail::inline_limit<std::size_t> forceinline(
-        std::numeric_limits<std::size_t>::max());
-
-inline detail::inline_limit<std::size_t> make_inline(std::size_t sz)
-{
-    return detail::inline_limit<std::size_t>(sz);
-}
-
-template<typename T, typename traits = std::char_traits<toml::character>>
-std::basic_ostream<toml::character, traits>&
-operator<<(std::basic_ostream<toml::character, traits>& os,
-           const toml::value& v)
-{
-    std::size_t* info =
-        static_cast<std::size_t*>(os.pword(detail::inline_limit<std::size_t>::index));
-    return os << (info == nullptr ? toml::format(v) : toml::format(v, *info));
-}
-
-}
-#endif // TOML11_FORMAT

toml/from_toml.hpp

@@ -1,66 +1,16 @@
+//     Copyright Toru Niina 2017.
+// Distributed under the MIT License.
 #ifndef TOML11_FROM_TOML
 #define TOML11_FROM_TOML
-#include "value.hpp"
+#include "get.hpp"
 
 namespace toml
 {
 
-template<typename T, toml::value_t vT = toml::detail::check_type<T>(),
-         typename std::enable_if<(vT != toml::value_t::Unknown &&
-         vT != value_t::Empty), std::nullptr_t>::type = nullptr>
+template<typename T>
 void from_toml(T& x, const toml::value& v)
 {
-    if(v.type() != vT)
-        throw type_error("from_toml: value type: " + stringize(v.type()) +
-                std::string(" is not arguemnt type: ") + stringize(vT));
-    x = v.cast<vT>();
-    return;
-}
-
-template<typename T, toml::value_t vT = toml::detail::check_type<T>(),
-         typename std::enable_if<(vT == toml::value_t::Unknown) &&
-         (!toml::detail::is_map<T>::value) &&
-         toml::detail::is_container<T>::value, std::nullptr_t>::type = nullptr>
-void from_toml(T& x, const toml::value& v)
-{
-    // TODO the case of x is not dynamic container case
-    if(v.type() != value_t::Array)
-        throw type_error("from_toml: value type: " + stringize(v.type()) +
-                         std::string(" is not argument type: Array"));
-    const auto& ar = v.cast<value_t::Array>();
-    try
-    {
-        toml::resize(x, ar.size());
-    }
-    catch(std::invalid_argument& iv)
-    {
-        throw toml::type_error("toml::from_toml: static array size is not enough");
-    }
-    auto iter = x.begin();
-    for(const auto& val : ar)
-    {
-        typename T::value_type v;
-        from_toml(v, val);
-        *iter = std::move(v);
-        ++iter;
-    }
-    return;
-}
-
-template<typename T, toml::value_t vT = toml::detail::check_type<T>(),
-         typename std::enable_if<(vT == toml::value_t::Unknown) &&
-         toml::detail::is_map<T>::value, std::nullptr_t>::type = nullptr>
-void from_toml(T& x, const toml::value& v)
-{
-    if(v.type() != value_t::Table)
-        throw type_error("from_toml: value type: " + stringize(v.type()) +
-                         std::string(" is not argument type: Table"));
-    x.clear();
-    const auto& tb = v.cast<value_t::Table>();
-    for(const auto& kv : tb)
-    {
-        x.insert(kv);
-    }
+    x = toml::get<typename std::remove_reference<T>::type>(v);
     return;
 }
 

toml/get.hpp

@@ -1,69 +1,578 @@
+//     Copyright Toru Niina 2017.
+// Distributed under the MIT License.
 #ifndef TOML11_GET
 #define TOML11_GET
+#include "result.hpp"
 #include "value.hpp"
 #include <algorithm>
 
 namespace toml
 {
 
-template<typename T, toml::value_t vT = toml::detail::check_type<T>(),
-         typename std::enable_if<(vT != toml::value_t::Unknown &&
-         vT != value_t::Empty), std::nullptr_t>::type = nullptr>
-inline T get(const toml::value& v)
+// ============================================================================
+// exact toml::* type
+
+template<typename T, typename std::enable_if<
+    detail::is_exact_toml_type<T>::value, std::nullptr_t>::type = nullptr>
+inline T& get(value& v)
 {
-    return static_cast<T>(v.cast<vT>());
+    return v.cast<detail::toml_value_t<T>::value>();
 }
 
-// array-like type
-template<typename T, toml::value_t vT = toml::detail::check_type<T>(),
-         typename std::enable_if<(vT == toml::value_t::Unknown) &&
-         (!toml::detail::is_map<T>::value) &&
-         toml::detail::is_container<T>::value, std::nullptr_t>::type = nullptr>
-T get(const toml::value& v)
+template<typename T, typename std::enable_if<
+    detail::is_exact_toml_type<T>::value, std::nullptr_t>::type = nullptr>
+inline T const& get(const value& v)
 {
-    if(v.type() != value_t::Array)
-        throw type_error("get: value type: " + stringize(v.type()) +
-                         std::string(" is not argument type: Array"));
+    return v.cast<detail::toml_value_t<T>::value>();
+}
+
+template<typename T, typename std::enable_if<
+    detail::is_exact_toml_type<T>::value, std::nullptr_t>::type = nullptr>
+inline T&& get(value&& v)
+{
+    return std::move(v.cast<detail::toml_value_t<T>::value>());
+}
+
+// ============================================================================
+// integer convertible from toml::Integer
+
+template<typename T, typename std::enable_if<detail::conjunction<
+    std::is_integral<T>,                            // T is integral
+    detail::negation<std::is_same<T, bool>>,        // but not bool
+    detail::negation<detail::is_exact_toml_type<T>> // but not toml::integer
+    >::value, std::nullptr_t>::type = nullptr>
+inline T get(const value& v)
+{
+    return static_cast<T>(v.cast<value_t::Integer>());
+}
+
+// ============================================================================
+// floating point convertible from toml::Float
+
+template<typename T, typename std::enable_if<detail::conjunction<
+    std::is_floating_point<T>,                      // T is floating_point
+    detail::negation<detail::is_exact_toml_type<T>> // but not toml::Float
+    >::value, std::nullptr_t>::type = nullptr>
+inline T get(const value& v)
+{
+    return static_cast<T>(v.cast<value_t::Float>());
+}
+
+// ============================================================================
+// std::string; toml uses its own toml::string, but it should be convertible to
+// std::string seamlessly
+
+template<typename T, typename std::enable_if<
+    std::is_same<T, std::string>::value, std::nullptr_t>::type = nullptr>
+inline std::string& get(value& v)
+{
+    return v.cast<value_t::String>().str;
+}
+
+template<typename T, typename std::enable_if<
+    std::is_same<T, std::string>::value, std::nullptr_t>::type = nullptr>
+inline std::string const& get(const value& v)
+{
+    return v.cast<value_t::String>().str;
+}
+
+template<typename T, typename std::enable_if<
+    std::is_same<T, std::string>::value, std::nullptr_t>::type = nullptr>
+inline std::string get(value&& v)
+{
+    return std::move(v.cast<value_t::String>().str);
+}
+
+// ============================================================================
+// std::chrono::duration from toml::local_time.
+
+template<typename T, typename std::enable_if<
+    detail::is_chrono_duration<T>::value, std::nullptr_t>::type = nullptr>
+inline T get(value& v)
+{
+    return std::chrono::duration_cast<T>(
+            std::chrono::nanoseconds(v.cast<value_t::LocalTime>()));
+}
+
+// ============================================================================
+// std::chrono::system_clock::time_point from toml::datetime variants
+
+template<typename T, typename std::enable_if<
+    std::is_same<std::chrono::system_clock::time_point, T>::value,
+    std::nullptr_t>::type = nullptr>
+inline T get(value& v)
+{
+    switch(v.type())
+    {
+        case value_t::LocalDate:
+        {
+            return std::chrono::system_clock::time_point(
+                    v.cast<value_t::LocalDate>());
+        }
+        case value_t::LocalDatetime:
+        {
+            return std::chrono::system_clock::time_point(
+                    v.cast<value_t::LocalDatetime>());
+        }
+        default:
+        {
+            return std::chrono::system_clock::time_point(
+                    v.cast<value_t::OffsetDatetime>());
+        }
+    }
+}
+
+// ============================================================================
+// forward declaration to use this recursively. ignore this and go ahead.
+
+template<typename T, typename std::enable_if<detail::conjunction<
+    detail::is_container<T>,                        // T is container
+    detail::has_resize_method<T>,                   // T::resize(N) works
+    detail::negation<detail::is_exact_toml_type<T>> // but not toml::array
+    >::value, std::nullptr_t>::type = nullptr>
+T get(const value& v);
+template<typename T, typename std::enable_if<detail::conjunction<
+    detail::is_container<T>,                        // T is container
+    detail::negation<detail::has_resize_method<T>>, // no T::resize() exists
+    detail::negation<detail::is_exact_toml_type<T>> // not toml::array
+    >::value, std::nullptr_t>::type = nullptr>
+T get(const value& v);
+template<typename T, typename std::enable_if<
+    detail::is_std_pair<T>::value, std::nullptr_t>::type = nullptr>
+T get(const value& v);
+template<typename T, typename std::enable_if<
+    detail::is_std_tuple<T>::value, std::nullptr_t>::type = nullptr>
+T get(const value& v);
+template<typename T, typename std::enable_if<detail::conjunction<
+    detail::is_map<T>,                              // T is map
+    detail::negation<detail::is_exact_toml_type<T>> // but not toml::table
+    >::value, std::nullptr_t>::type = nullptr>
+T get(const toml::value& v);
+
+// ============================================================================
+// array-like types; most likely STL container, like std::vector, etc.
+
+template<typename T, typename std::enable_if<detail::conjunction<
+    detail::is_container<T>,                        // T is container
+    detail::has_resize_method<T>,                   // T::resize(N) works
+    detail::negation<detail::is_exact_toml_type<T>> // but not toml::array
+    >::value, std::nullptr_t>::type>
+T get(const value& v)
+{
+    using value_type = typename T::value_type;
+    const auto& ar = v.cast<value_t::Array>();
+
+    T container; container.resize(ar.size());
+    std::transform(ar.cbegin(), ar.cend(), container.begin(),
+                   [](const value& x){return ::toml::get<value_type>(x);});
+    return container;
+}
+
+// ============================================================================
+// array-like types; but does not have resize(); most likely std::array.
+
+template<typename T, typename std::enable_if<detail::conjunction<
+    detail::is_container<T>,                        // T is container
+    detail::negation<detail::has_resize_method<T>>, // no T::resize() exists
+    detail::negation<detail::is_exact_toml_type<T>> // not toml::array
+    >::value, std::nullptr_t>::type>
+T get(const value& v)
+{
+    using value_type = typename T::value_type;
+    const auto& ar = v.cast<value_t::Array>();
+
+    T container;
+    if(ar.size() != container.size())
+    {
+        throw std::out_of_range(detail::format_underline(concat_to_string(
+            "[erorr] toml::get specified container size is ", container.size(),
+            " but there are ", ar.size(), " elements in toml array."),
+            detail::get_region(v), "here"));
+    }
+    std::transform(ar.cbegin(), ar.cend(), container.begin(),
+                   [](const value& x){return ::toml::get<value_type>(x);});
+    return container;
+}
+
+// ============================================================================
+// std::pair.
+
+template<typename T, typename std::enable_if<
+    detail::is_std_pair<T>::value, std::nullptr_t>::type>
+T get(const value& v)
+{
+    using first_type  = typename T::first_type;
+    using second_type = typename T::second_type;
 
     const auto& ar = v.cast<value_t::Array>();
-    T tmp;
-    try
+    if(ar.size() != 2)
     {
-        toml::resize(tmp, ar.size());
+        throw std::out_of_range(detail::format_underline(concat_to_string(
+            "[erorr] toml::get specified std::pair but there are ", ar.size(),
+            " elements in toml array."), detail::get_region(v), "here"));
     }
-    catch(std::invalid_argument& iv)
-    {
-        throw toml::type_error("toml::get: static array size is not enough");
-    }
-    std::transform(ar.cbegin(), ar.cend(), tmp.begin(),
-        [](toml::value const& elem){return get<typename T::value_type>(elem);});
-    return tmp;
+    return std::make_pair(::toml::get<first_type >(ar.at(0)),
+                          ::toml::get<second_type>(ar.at(1)));
 }
 
-// table-like case
-template<typename T, toml::value_t vT = toml::detail::check_type<T>(),
-         typename std::enable_if<(vT == toml::value_t::Unknown) &&
-         toml::detail::is_map<T>::value, std::nullptr_t>::type = nullptr>
+// ============================================================================
+// std::tuple.
+
+namespace detail
+{
+
+template<typename T, std::size_t ...I>
+T get_tuple_impl(const toml::Array& a, index_sequence<I...>)
+{
+    return std::make_tuple(
+        ::toml::get<typename std::tuple_element<I, T>::type>(a.at(I))...);
+}
+
+} // detail
+
+template<typename T, typename std::enable_if<
+    detail::is_std_tuple<T>::value, std::nullptr_t>::type>
+T get(const value& v)
+{
+    const auto& ar = v.cast<value_t::Array>();
+    if(ar.size() != std::tuple_size<T>::value)
+    {
+        throw std::out_of_range(detail::format_underline(concat_to_string(
+            "[erorr] toml::get specified std::tuple with ",
+            std::tuple_size<T>::value, "elements, but there are ", ar.size(),
+            " elements in toml array."), detail::get_region(v), "here"));
+    }
+    return detail::get_tuple_impl<T>(ar,
+            detail::make_index_sequence<std::tuple_size<T>::value>{});
+}
+
+// ============================================================================
+// map-like types; most likely STL map, like std::map or std::unordered_map.
+
+template<typename T, typename std::enable_if<detail::conjunction<
+    detail::is_map<T>,                              // T is map
+    detail::negation<detail::is_exact_toml_type<T>> // but not toml::table
+    >::value, std::nullptr_t>::type>
 T get(const toml::value& v)
 {
-    if(v.type() != value_t::Table)
-        throw type_error("get: value type: " + stringize(v.type()) +
-                         std::string(" is not argument type: Table"));
-    T tmp;
-    const auto& tb = v.cast<value_t::Table>();
-    for(const auto& kv : tb){tmp.insert(kv);}
-    return tmp;
+    using key_type    = typename T::key_type;
+    using mapped_type = typename T::mapped_type;
+    static_assert(std::is_convertible<std::string, key_type>::value,
+                  "toml::get only supports map type of which key_type is "
+                  "convertible from std::string.");
+    T map;
+    for(const auto& kv : v.cast<value_t::Table>())
+    {
+        map[key_type(kv.first)] = ::toml::get<mapped_type>(kv.second);
+    }
+    return map;
 }
 
-//  get_or -----------------------------------------------------------------
+// ============================================================================
+// find and get
 
 template<typename T>
-inline typename std::remove_cv<typename std::remove_reference<T>::type>::type
-get_or(const toml::Table& tab, const toml::key& ky, T&& opt)
+decltype(::toml::get<T>(std::declval<const ::toml::value&>()))
+find(const toml::table& tab, const toml::key& ky,
+     std::string tablename = "unknown table")
+{
+    if(tab.count(ky) == 0)
+    {
+        throw std::out_of_range(concat_to_string("[error] key \"", ky,
+                    "\" not found in ", tablename));
+    }
+    return ::toml::get<T>(tab.at(ky));
+}
+template<typename T>
+decltype(::toml::get<T>(std::declval<::toml::value&>()))
+find(toml::table& tab, const toml::key& ky,
+     std::string tablename = "unknown table")
+{
+    if(tab.count(ky) == 0)
+    {
+        throw std::out_of_range(concat_to_string("[error] key \"", ky,
+                    "\" not found in ", tablename));
+    }
+    return ::toml::get<T>(tab[ky]);
+}
+template<typename T>
+decltype(::toml::get<T>(std::declval<::toml::value&&>()))
+find(toml::table&& tab, const toml::key& ky,
+     std::string tablename = "unknown table")
+{
+    if(tab.count(ky) == 0)
+    {
+        throw std::out_of_range(concat_to_string("[error] key \"", ky,
+                    "\" not found in ", tablename));
+    }
+    return ::toml::get<T>(std::move(tab[ky]));
+}
+
+template<typename T>
+decltype(::toml::get<T>(std::declval<const ::toml::value&>()))
+find(const toml::value& v, const toml::key& ky)
+{
+    const auto& tab = ::toml::get<toml::table>(v);
+    if(tab.count(ky) == 0)
+    {
+        throw std::out_of_range(detail::format_underline(concat_to_string(
+            "[error] key \"", ky, "\" not found"), detail::get_region(v),
+            "in this table"));
+    }
+    return ::toml::get<T>(tab.at(ky));
+}
+template<typename T>
+decltype(::toml::get<T>(std::declval<::toml::value&>()))
+find(toml::value& v, const toml::key& ky)
+{
+    auto& tab = ::toml::get<toml::table>(v);
+    if(tab.count(ky) == 0)
+    {
+        throw std::out_of_range(detail::format_underline(concat_to_string(
+            "[error] key \"", ky, "\" not found"), detail::get_region(v),
+            "in this table"));
+    }
+    return ::toml::get<T>(tab.at(ky));
+}
+template<typename T>
+decltype(::toml::get<T>(std::declval<::toml::value&&>()))
+find(toml::value&& v, const toml::key& ky)
+{
+    auto tab = ::toml::get<toml::table>(std::move(v));
+    if(tab.count(ky) == 0)
+    {
+        throw std::out_of_range(detail::format_underline(concat_to_string(
+            "[error] key \"", ky, "\" not found"), detail::get_region(v),
+            "in this table"));
+    }
+    return ::toml::get<T>(std::move(tab[ky]));
+}
+
+
+// ============================================================================
+// get_or
+
+template<typename T>
+decltype(::toml::get<typename std::remove_cv<
+            typename std::remove_reference<T>::type>::type>(
+        std::declval<const toml::value&>()))
+get_or(const toml::value& v, T&& opt)
+{
+    try
+    {
+        return get<typename std::remove_cv<
+            typename std::remove_reference<T>::type>::type>(v);
+    }
+    catch(...)
+    {
+        return std::forward<T>(opt);
+    }
+}
+template<typename T>
+decltype(::toml::get<typename std::remove_cv<
+            typename std::remove_reference<T>::type>::type>(
+        std::declval<toml::value&>()))
+get_or(toml::value& v, T&& opt)
+{
+    try
+    {
+        return get<typename std::remove_cv<
+            typename std::remove_reference<T>::type>::type>(v);
+    }
+    catch(...)
+    {
+        return std::forward<T>(opt);
+    }
+}
+template<typename T>
+decltype(::toml::get<typename std::remove_cv<
+            typename std::remove_reference<T>::type>::type>(
+        std::declval<toml::value&&>()))
+get_or(toml::value&& v, T&& opt)
+{
+    try
+    {
+        return get<typename std::remove_cv<
+            typename std::remove_reference<T>::type>::type>(std::move(v));
+    }
+    catch(...)
+    {
+        return std::forward<T>(opt);
+    }
+}
+
+
+template<typename T>
+auto get_or(const toml::table& tab, const toml::key& ky, T&& opt)
+    -> decltype(get_or(std::declval<value const&>(), std::forward<T>(opt)))
 {
     if(tab.count(ky) == 0) {return std::forward<T>(opt);}
-    return get<typename std::remove_cv<
-        typename std::remove_reference<T>::type>::type>(tab.find(ky)->second);
+    return ::toml::get_or(tab.at(ky), std::forward<T>(opt));
+}
+template<typename T>
+auto get_or(toml::table& tab, const toml::key& ky, T&& opt)
+    -> decltype(get_or(std::declval<value&>(), std::forward<T>(opt)))
+{
+    if(tab.count(ky) == 0) {return std::forward<T>(opt);}
+    return ::toml::get_or(tab[ky], std::forward<T>(opt));
+}
+template<typename T>
+auto get_or(toml::table&& tab, const toml::key& ky, T&& opt)
+    -> decltype(get_or(std::declval<value&&>(), std::forward<T>(opt)))
+{
+    if(tab.count(ky) == 0) {return std::forward<T>(opt);}
+    return ::toml::get_or(std::move(tab[ky]), std::forward<T>(opt));
+}
+
+template<typename T>
+auto get_or(const toml::value& v, const toml::key& ky, T&& opt)
+    -> decltype(get_or(std::declval<value const&>(), std::forward<T>(opt)))
+{
+    if(v.type() != toml::value_t::Table){return std::forward<T>(opt);}
+    const auto& tab = toml::get<toml::table>(v);
+    if(tab.count(ky) == 0) {return std::forward<T>(opt);}
+    return ::toml::get_or(tab.at(ky), std::forward<T>(opt));
+}
+template<typename T>
+auto get_or(toml::value& v, const toml::key& ky, T&& opt)
+    -> decltype(get_or(std::declval<value&>(), std::forward<T>(opt)))
+{
+    if(v.type() != toml::value_t::Table){return std::forward<T>(opt);}
+    auto& tab = toml::get<toml::table>(v);
+    if(tab.count(ky) == 0) {return std::forward<T>(opt);}
+    return ::toml::get_or(tab[ky], std::forward<T>(opt));
+}
+template<typename T>
+auto get_or(toml::value&& v, const toml::key& ky, T&& opt)
+    -> decltype(get_or(std::declval<value&&>(), std::forward<T>(opt)))
+{
+    if(v.type() != toml::value_t::Table){return std::forward<T>(opt);}
+    auto tab = toml::get<toml::table>(std::move(v));
+    if(tab.count(ky) == 0) {return std::forward<T>(opt);}
+    return ::toml::get_or(std::move(tab[ky]), std::forward<T>(opt));
+}
+
+// ============================================================================
+// expect
+
+template<typename T>
+auto expect(const toml::value& v)
+    -> result<decltype(::toml::get<T>(v)), std::string>
+{
+    try
+    {
+        return ok(get<T>(v));
+    }
+    catch(const type_error& te)
+    {
+        return err(te.what());
+    }
+}
+template<typename T>
+auto expect(toml::value& v)
+    -> result<decltype(::toml::get<T>(v)), std::string>
+{
+    try
+    {
+        return ok(get<T>(v));
+    }
+    catch(const type_error& te)
+    {
+        return err(te.what());
+    }
+}
+template<typename T>
+auto expect(toml::value&& v)
+    -> result<decltype(::toml::get<T>(std::move(v))), std::string>
+{
+    try
+    {
+        return ok(get<T>(std::move(v)));
+    }
+    catch(const type_error& te)
+    {
+        return err(te.what());
+    }
+}
+
+template<typename T>
+auto expect(const toml::value& v, const toml::key& k)
+    -> result<decltype(::toml::get<T>(v, k)), std::string>
+{
+    try
+    {
+        return ok(get<T>(v, k));
+    }
+    catch(const std::exception& e)
+    {
+        return err(e.what());
+    }
+}
+template<typename T>
+auto expect(toml::value& v, const toml::key& k)
+    -> result<decltype(::toml::get<T>(v, k)), std::string>
+{
+    try
+    {
+        return ok(get<T>(v, k));
+    }
+    catch(const std::exception& e)
+    {
+        return err(e.what());
+    }
+}
+template<typename T>
+auto expect(toml::value&& v, const toml::key& k)
+    -> result<decltype(::toml::get<T>(std::move(v), k)), std::string>
+{
+    try
+    {
+        return ok(get<T>(std::move(v), k));
+    }
+    catch(const std::exception& e)
+    {
+        return err(e.what());
+    }
+}
+
+template<typename T>
+auto expect(const toml::table& t, const toml::key& k, std::string tn)
+    -> result<decltype(::toml::get<T>(t, k, std::move(tn))), std::string>
+{
+    try
+    {
+        return ok(get<T>(t, k, std::move(tn)));
+    }
+    catch(const std::exception& e)
+    {
+        return err(e.what());
+    }
+}
+template<typename T>
+auto expect(toml::table& t, const toml::key& k, std::string tn)
+    -> result<decltype(::toml::get<T>(t, k, std::move(tn))), std::string>
+{
+    try
+    {
+        return ok(get<T>(t, k, std::move(tn)));
+    }
+    catch(const std::exception& e)
+    {
+        return err(e.what());
+    }
+}
+template<typename T>
+auto expect(toml::table&& t, const toml::key& k, std::string tn)
+    -> result<decltype(::toml::get<T>(std::move(t), k, std::move(tn))), std::string>
+{
+    try
+    {
+        return ok(get<T>(std::move(t), k, std::move(tn)));
+    }
+    catch(const std::exception& e)
+    {
+        return err(e.what());
+    }
 }
 
 } // toml

toml/lexer.hpp

@@ -0,0 +1,222 @@
+//     Copyright Toru Niina 2017.
+// Distributed under the MIT License.
+#ifndef TOML11_LEXER_HPP
+#define TOML11_LEXER_HPP
+#include "combinator.hpp"
+#include <stdexcept>
+#include <istream>
+#include <sstream>
+#include <fstream>
+
+namespace toml
+{
+namespace detail
+{
+
+// these scans contents from current location in a container of char
+// and extract a region that matches their own pattern.
+// to see the implementation of each component, see combinator.hpp.
+
+using lex_wschar  = either<character<' '>, character<'\t'>>;
+using lex_ws      = repeat<lex_wschar, at_least<1>>;
+using lex_newline = either<character<'\n'>,
+                           sequence<character<'\r'>, character<'\n'>>>;
+using lex_lower   = in_range<'a', 'z'>;
+using lex_upper   = in_range<'A', 'Z'>;
+using lex_alpha   = either<lex_lower, lex_upper>;
+using lex_digit   = in_range<'0', '9'>;
+using lex_nonzero = in_range<'1', '9'>;
+using lex_oct_dig = in_range<'0', '7'>;
+using lex_bin_dig = in_range<'0', '1'>;
+using lex_hex_dig = either<lex_digit, in_range<'A', 'F'>, in_range<'a', 'f'>>;
+
+using lex_hex_prefix = sequence<character<'0'>, character<'x'>>;
+using lex_oct_prefix = sequence<character<'0'>, character<'o'>>;
+using lex_bin_prefix = sequence<character<'0'>, character<'b'>>;
+using lex_underscore = character<'_'>;
+using lex_plus       = character<'+'>;
+using lex_minus      = character<'-'>;
+using lex_sign       = either<lex_plus, lex_minus>;
+
+// digit | nonzero 1*(digit | _ digit)
+using lex_unsigned_dec_int = either<sequence<lex_nonzero, repeat<
+    either<lex_digit, sequence<lex_underscore, lex_digit>>, at_least<1>>>,
+    lex_digit>;
+// (+|-)? unsigned_dec_int
+using lex_dec_int = sequence<maybe<lex_sign>, lex_unsigned_dec_int>;
+
+// hex_prefix hex_dig *(hex_dig | _ hex_dig)
+using lex_hex_int = sequence<lex_hex_prefix, sequence<lex_hex_dig, repeat<
+    either<lex_hex_dig, sequence<lex_underscore, lex_hex_dig>>, unlimited>>>;
+// oct_prefix oct_dig *(oct_dig | _ oct_dig)
+using lex_oct_int = sequence<lex_oct_prefix, sequence<lex_oct_dig, repeat<
+    either<lex_oct_dig, sequence<lex_underscore, lex_oct_dig>>, unlimited>>>;
+// bin_prefix bin_dig *(bin_dig | _ bin_dig)
+using lex_bin_int = sequence<lex_bin_prefix, sequence<lex_bin_dig, repeat<
+    either<lex_bin_dig, sequence<lex_underscore, lex_bin_dig>>, unlimited>>>;
+
+// (dec_int | hex_int | oct_int | bin_int)
+using lex_integer = either<lex_bin_int, lex_oct_int, lex_hex_int, lex_dec_int>;
+
+// ===========================================================================
+
+using lex_inf = sequence<character<'i'>, character<'n'>, character<'f'>>;
+using lex_nan = sequence<character<'n'>, character<'a'>, character<'n'>>;
+using lex_special_float = sequence<maybe<lex_sign>, either<lex_inf, lex_nan>>;
+using lex_exponent_part = sequence<either<character<'e'>, character<'E'>>, lex_dec_int>;
+
+using lex_zero_prefixable_int = sequence<lex_digit, repeat<either<lex_digit,
+      sequence<lex_underscore, lex_digit>>, unlimited>>;
+using lex_fractional_part = sequence<character<'.'>, lex_zero_prefixable_int>;
+
+using lex_float = either<lex_special_float,
+      sequence<lex_dec_int, either<lex_exponent_part,
+      sequence<lex_fractional_part, maybe<lex_exponent_part>>>>>;
+
+// ===========================================================================
+
+using lex_true = sequence<character<'t'>, character<'r'>,
+                          character<'u'>, character<'e'>>;
+using lex_false = sequence<character<'f'>, character<'a'>, character<'l'>,
+                           character<'s'>, character<'e'>>;
+using lex_boolean = either<lex_true, lex_false>;
+
+// ===========================================================================
+
+using lex_date_fullyear = repeat<lex_digit, exactly<4>>;
+using lex_date_month    = repeat<lex_digit, exactly<2>>;
+using lex_date_mday     = repeat<lex_digit, exactly<2>>;
+using lex_time_delim    = either<character<'T'>, character<'t'>, character<' '>>;
+using lex_time_hour     = repeat<lex_digit, exactly<2>>;
+using lex_time_minute   = repeat<lex_digit, exactly<2>>;
+using lex_time_second   = repeat<lex_digit, exactly<2>>;
+using lex_time_secfrac  = sequence<character<'.'>,
+                                   repeat<lex_digit, at_least<1>>>;
+
+using lex_time_numoffset = sequence<either<character<'+'>, character<'-'>>,
+                                    sequence<lex_time_hour, character<':'>,
+                                             lex_time_minute>>;
+using lex_time_offset = either<character<'Z'>, character<'z'>,
+                               lex_time_numoffset>;
+
+using lex_partial_time = sequence<lex_time_hour,   character<':'>,
+                                  lex_time_minute, character<':'>,
+                                  lex_time_second, maybe<lex_time_secfrac>>;
+using lex_full_date    = sequence<lex_date_fullyear, character<'-'>,
+                                  lex_date_month,    character<'-'>,
+                                  lex_date_mday>;
+using lex_full_time    = sequence<lex_partial_time, lex_time_offset>;
+
+using lex_offset_date_time = sequence<lex_full_date, lex_time_delim, lex_full_time>;
+using lex_local_date_time  = sequence<lex_full_date, lex_time_delim, lex_partial_time>;
+using lex_local_date       = lex_full_date;
+using lex_local_time       = lex_partial_time;
+
+// ===========================================================================
+
+using lex_quotation_mark  = character<'"'>;
+using lex_basic_unescaped = exclude<either<in_range<0x00, 0x1F>,
+                                           character<0x22>, character<0x5C>,
+                                           character<0x7F>>>;
+using lex_escape          = character<'\\'>;
+using lex_escape_unicode_short = sequence<character<'u'>,
+                                          repeat<lex_hex_dig, exactly<4>>>;
+using lex_escape_unicode_long  = sequence<character<'U'>,
+                                          repeat<lex_hex_dig, exactly<8>>>;
+using lex_escape_seq_char = either<character<'"'>, character<'\\'>,
+                                   character<'/'>, character<'b'>,
+                                   character<'f'>, character<'n'>,
+                                   character<'r'>, character<'t'>,
+                                   lex_escape_unicode_short,
+                                   lex_escape_unicode_long
+                                   >;
+using lex_escaped      = sequence<lex_escape, lex_escape_seq_char>;
+using lex_basic_char   = either<lex_basic_unescaped, lex_escaped>;
+using lex_basic_string = sequence<lex_quotation_mark,
+                                  repeat<lex_basic_char, unlimited>,
+                                  lex_quotation_mark>;
+
+using lex_ml_basic_string_delim = repeat<lex_quotation_mark, exactly<3>>;
+using lex_ml_basic_unescaped    = exclude<either<in_range<0x00, 0x1F>,
+                                                 character<0x5C>,
+                                                 character<0x7F>,
+                                                 lex_ml_basic_string_delim>>;
+
+using lex_ml_basic_escaped_newline = sequence<
+        lex_escape, maybe<lex_ws>, lex_newline,
+        repeat<either<lex_ws, lex_newline>, unlimited>>;
+
+using lex_ml_basic_char = either<lex_ml_basic_unescaped, lex_escaped>;
+using lex_ml_basic_body = repeat<either<lex_ml_basic_char, lex_newline,
+                                        lex_ml_basic_escaped_newline>,
+                                 unlimited>;
+using lex_ml_basic_string = sequence<lex_ml_basic_string_delim,
+                                     lex_ml_basic_body,
+                                     lex_ml_basic_string_delim>;
+
+using lex_literal_char = exclude<either<in_range<0x00, 0x08>,
+                                        in_range<0x10, 0x19>, character<0x27>>>;
+using lex_apostrophe = character<'\''>;
+using lex_literal_string = sequence<lex_apostrophe,
+                                    repeat<lex_literal_char, unlimited>,
+                                    lex_apostrophe>;
+
+using lex_ml_literal_string_delim = repeat<lex_apostrophe, exactly<3>>;
+
+using lex_ml_literal_char = exclude<either<in_range<0x00, 0x08>,
+                                           in_range<0x10, 0x1F>,
+                                           character<0x7F>,
+                                           lex_ml_literal_string_delim>>;
+using lex_ml_literal_body = repeat<either<lex_ml_literal_char, lex_newline>,
+                                   unlimited>;
+using lex_ml_literal_string = sequence<lex_ml_literal_string_delim,
+                                       lex_ml_literal_body,
+                                       lex_ml_literal_string_delim>;
+
+using lex_string = either<lex_ml_basic_string,   lex_basic_string,
+                          lex_ml_literal_string, lex_literal_string>;
+
+// ===========================================================================
+
+using lex_comment_start_symbol = character<'#'>;
+using lex_non_eol = either<character<'\t'>, exclude<in_range<0x00, 0x19>>>;
+using lex_comment = sequence<lex_comment_start_symbol,
+                             repeat<lex_non_eol, unlimited>>;
+
+using lex_dot_sep = sequence<maybe<lex_ws>, character<'.'>, maybe<lex_ws>>;
+
+using lex_unquoted_key = repeat<either<lex_alpha, lex_digit,
+                                       character<'-'>, character<'_'>>,
+                                at_least<1>>;
+using lex_quoted_key = either<lex_basic_string, lex_literal_string>;
+using lex_simple_key = either<lex_unquoted_key, lex_quoted_key>;
+using lex_dotted_key = sequence<lex_simple_key,
+                                repeat<sequence<lex_dot_sep, lex_simple_key>,
+                                       at_least<1>
+                                       >
+                                >;
+using lex_key = either<lex_dotted_key, lex_simple_key>;
+
+using lex_keyval_sep = sequence<maybe<lex_ws>,
+                                character<'='>,
+                                maybe<lex_ws>>;
+
+using lex_std_table_open  = character<'['>;
+using lex_std_table_close = character<']'>;
+using lex_std_table       = sequence<lex_std_table_open,
+                                     maybe<lex_ws>,
+                                     lex_key,
+                                     maybe<lex_ws>,
+                                     lex_std_table_close>;
+
+using lex_array_table_open  = sequence<lex_std_table_open,  lex_std_table_open>;
+using lex_array_table_close = sequence<lex_std_table_close, lex_std_table_close>;
+using lex_array_table       = sequence<lex_array_table_open,
+                                       maybe<lex_ws>,
+                                       lex_key,
+                                       maybe<lex_ws>,
+                                       lex_array_table_close>;
+
+} // detail
+} // toml
+#endif // TOML_LEXER_HPP

toml/region.hpp

@@ -0,0 +1,361 @@
+//     Copyright Toru Niina 2017.
+// Distributed under the MIT License.
+#ifndef TOML11_REGION_H
+#define TOML11_REGION_H
+#include "exception.hpp"
+#include <memory>
+#include <vector>
+#include <algorithm>
+#include <initializer_list>
+#include <iterator>
+#include <iomanip>
+
+namespace toml
+{
+namespace detail
+{
+
+// helper function to avoid std::string(0, 'c')
+template<typename Iterator>
+std::string make_string(Iterator first, Iterator last)
+{
+    if(first == last) {return "";}
+    return std::string(first, last);
+}
+inline std::string make_string(std::size_t len, char c)
+{
+    if(len == 0) {return "";}
+    return std::string(len, c);
+}
+
+// location in a container, normally in a file content.
+// shared_ptr points the resource that the iter points.
+// it can be used not only for resource handling, but also error message.
+template<typename Container>
+struct location
+{
+    static_assert(std::is_same<char, typename Container::value_type>::value,"");
+    using const_iterator = typename Container::const_iterator;
+    using source_ptr     = std::shared_ptr<const Container>;
+
+    location(std::string name, Container cont)
+      : source_(std::make_shared<Container>(std::move(cont))),
+        source_name_(std::move(name)), iter_(source_->cbegin())
+    {}
+    location(const location&) = default;
+    location(location&&)      = default;
+    location& operator=(const location&) = default;
+    location& operator=(location&&)      = default;
+    ~location() = default;
+
+    const_iterator& iter()       noexcept {return iter_;}
+    const_iterator  iter() const noexcept {return iter_;}
+
+    const_iterator  begin() const noexcept {return source_->cbegin();}
+    const_iterator  end()   const noexcept {return source_->cend();}
+
+    source_ptr const& source() const& noexcept {return source_;}
+    source_ptr&&      source() &&     noexcept {return std::move(source_);}
+
+    std::string const& name() const noexcept {return source_name_;}
+
+  private:
+
+    source_ptr     source_;
+    std::string    source_name_;
+    const_iterator iter_;
+};
+
+// region in a container, normally in a file content.
+// shared_ptr points the resource that the iter points.
+// combinators returns this.
+// it will be used to generate better error messages.
+struct region_base
+{
+    region_base() = default;
+    virtual ~region_base() = default;
+    region_base(const region_base&) = default;
+    region_base(region_base&&     ) = default;
+    region_base& operator=(const region_base&) = default;
+    region_base& operator=(region_base&&     ) = default;
+
+    virtual bool is_ok()           const noexcept {return false;}
+
+    virtual std::string str()      const {return std::string("unknown region");}
+    virtual std::string name()     const {return std::string("unknown file");}
+    virtual std::string line()     const {return std::string("unknown line");}
+    virtual std::string line_num() const {return std::string("?");}
+
+
+    virtual std::size_t before()   const noexcept {return 0;}
+    virtual std::size_t size()     const noexcept {return 0;}
+    virtual std::size_t after()    const noexcept {return 0;}
+};
+
+template<typename Container>
+struct region final : public region_base
+{
+    static_assert(std::is_same<char, typename Container::value_type>::value,"");
+    using const_iterator = typename Container::const_iterator;
+    using source_ptr     = std::shared_ptr<const Container>;
+
+    // delete default constructor. source_ never be null.
+    region() = delete;
+
+    region(const location<Container>& loc)
+      : source_(loc.source()), source_name_(loc.name()),
+        first_(loc.iter()), last_(loc.iter())
+    {}
+    region(location<Container>&& loc)
+      : source_(loc.source()), source_name_(loc.name()),
+        first_(loc.iter()), last_(loc.iter())
+    {}
+
+    region(const location<Container>& loc, const_iterator f, const_iterator l)
+      : source_(loc.source()), source_name_(loc.name()), first_(f), last_(l)
+    {}
+    region(location<Container>&& loc, const_iterator f, const_iterator l)
+      : source_(loc.source()), source_name_(loc.name()), first_(f), last_(l)
+    {}
+
+    region(const region&) = default;
+    region(region&&)      = default;
+    region& operator=(const region&) = default;
+    region& operator=(region&&)      = default;
+    ~region() = default;
+
+    region& operator+=(const region& other)
+    {
+        if(this->begin() != other.begin() || this->end() != other.end() ||
+           this->last_  != other.first_)
+        {
+            throw internal_error("invalid region concatenation");
+        }
+        this->last_ = other.last_;
+        return *this;
+    }
+
+    bool is_ok() const noexcept override {return static_cast<bool>(source_);}
+
+    std::string str()  const override {return make_string(first_, last_);}
+    std::string line() const override
+    {
+        if(this->contain_newline())
+        {
+            return make_string(this->line_begin(),
+                    std::find(this->line_begin(), this->last(), '\n'));
+        }
+        return make_string(this->line_begin(), this->line_end());
+    }
+    std::string line_num() const override
+    {
+        return std::to_string(1 + std::count(this->begin(), this->first(), '\n'));
+    }
+
+    std::size_t size() const noexcept override
+    {
+        return std::distance(first_, last_);
+    }
+    std::size_t before() const noexcept override
+    {
+        return std::distance(this->line_begin(), this->first());
+    }
+    std::size_t after() const noexcept override
+    {
+        return std::distance(this->last(), this->line_end());
+    }
+
+    bool contain_newline() const noexcept
+    {
+        return std::find(this->first(), this->last(), '\n') != this->last();
+    }
+
+    const_iterator line_begin() const noexcept
+    {
+        using reverse_iterator = std::reverse_iterator<const_iterator>;
+        return std::find(reverse_iterator(this->first()),
+                         reverse_iterator(this->begin()), '\n').base();
+    }
+    const_iterator line_end() const noexcept
+    {
+        return std::find(this->last(), this->end(), '\n');
+    }
+
+    const_iterator begin() const noexcept {return source_->cbegin();}
+    const_iterator end()   const noexcept {return source_->cend();}
+    const_iterator first() const noexcept {return first_;}
+    const_iterator last()  const noexcept {return last_;}
+
+    source_ptr const& source() const& noexcept {return source_;}
+    source_ptr&&      source() &&     noexcept {return std::move(source_);}
+
+    std::string name() const override {return source_name_;}
+
+  private:
+
+    source_ptr     source_;
+    std::string    source_name_;
+    const_iterator first_, last_;
+};
+
+// to show a better error message.
+inline std::string format_underline(const std::string& message,
+        const region_base& reg, const std::string& comment_for_underline,
+        std::vector<std::string> helps = {})
+{
+#ifdef _WIN32
+    const auto newline = "\r\n";
+#else
+    const char newline = '\n';
+#endif
+    const auto line        = reg.line();
+    const auto line_number = reg.line_num();
+
+    std::string retval;
+    retval += message;
+    retval += newline;
+    retval += " --> ";
+    retval += reg.name();
+    retval += newline;
+    retval += ' ';
+    retval += line_number;
+    retval += " | ";
+    retval += line;
+    retval += newline;
+    retval += make_string(line_number.size() + 1, ' ');
+    retval += " | ";
+    retval += make_string(reg.before(), ' ');
+    retval += make_string(reg.size(),   '~');
+    retval += ' ';
+    retval += comment_for_underline;
+    if(helps.size() != 0)
+    {
+        retval += newline;
+        retval += make_string(line_number.size() + 1, ' ');
+        retval += " | ";
+        for(const auto help : helps)
+        {
+            retval += newline;
+            retval += "Hint: ";
+            retval += help;
+        }
+    }
+    return retval;
+}
+
+// to show a better error message.
+inline std::string format_underline(const std::string& message,
+        const region_base& reg1, const std::string& comment_for_underline1,
+        const region_base& reg2, const std::string& comment_for_underline2,
+        std::vector<std::string> helps = {})
+{
+#ifdef _WIN32
+    const auto newline = "\r\n";
+#else
+    const char newline = '\n';
+#endif
+    const auto line1        = reg1.line();
+    const auto line_number1 = reg1.line_num();
+    const auto line2        = reg2.line();
+    const auto line_number2 = reg2.line_num();
+    const auto line_num_width =
+        std::max(line_number1.size(), line_number2.size());
+
+    std::ostringstream retval;
+    retval << message;
+    retval << newline;
+    retval << " --> ";
+    retval << reg1.name() << newline;;
+//  ---------------------------------------
+    retval << ' ' << std::setw(line_num_width) << line_number1;
+    retval << " | " << line1 << newline;
+    retval << make_string(line_num_width + 1, ' ');
+    retval << " | ";
+    retval << make_string(reg1.before(), ' ');
+    retval << make_string(reg1.size(),   '~');
+    retval << ' ';
+    retval << comment_for_underline1 << newline;
+//  ---------------------------------------
+    retval << " ..." << newline;
+    retval << ' ' << std::setw(line_num_width) << line_number2;
+    retval << " | " << line2 << newline;
+    retval << make_string(line_num_width + 1, ' ');
+    retval << " | ";
+    retval << make_string(reg2.before(), ' ');
+    retval << make_string(reg2.size(),   '~');
+    retval << ' ';
+    retval << comment_for_underline2;
+    if(helps.size() != 0)
+    {
+        retval << newline;
+        retval << make_string(line_num_width + 1, ' ');
+        retval << " | ";
+        for(const auto help : helps)
+        {
+            retval << newline;
+            retval << "Hint: ";
+            retval << help;
+        }
+    }
+    return retval.str();
+}
+
+
+// to show a better error message.
+template<typename Container>
+std::string
+format_underline(const std::string& message, const location<Container>& loc,
+                 const std::string& comment_for_underline,
+                 std::vector<std::string> helps = {})
+{
+#ifdef _WIN32
+    const auto newline = "\r\n";
+#else
+    const char newline = '\n';
+#endif
+    using const_iterator   = typename location<Container>::const_iterator;
+    using reverse_iterator = std::reverse_iterator<const_iterator>;
+    const auto line_begin  = std::find(reverse_iterator(loc.iter()),
+                                       reverse_iterator(loc.begin()),
+                                       '\n').base();
+    const auto line_end    = std::find(loc.iter(), loc.end(), '\n');
+
+    const auto line_number = std::to_string(
+            1 + std::count(loc.begin(), loc.iter(), '\n'));
+
+    std::string retval;
+    retval += message;
+    retval += newline;
+    retval += " --> ";
+    retval += loc.name();
+    retval += newline;
+    retval += ' ';
+    retval += line_number;
+    retval += " | ";
+    retval += make_string(line_begin, line_end);
+    retval += newline;
+    retval += make_string(line_number.size() + 1, ' ');
+    retval += " | ";
+    retval += make_string(std::distance(line_begin, loc.iter()),' ');
+    retval += '^';
+    retval += make_string(std::distance(loc.iter(), line_end), '-');
+    retval += ' ';
+    retval += comment_for_underline;
+    if(helps.size() != 0)
+    {
+        retval += newline;
+        retval += make_string(line_number.size() + 1, ' ');
+        retval += " | ";
+        for(const auto help : helps)
+        {
+            retval += newline;
+            retval += "Hint: ";
+            retval += help;
+        }
+    }
+    return retval;
+}
+
+} // detail
+} // toml
+#endif// TOML11_REGION_H

toml/result.hpp

@@ -0,0 +1,642 @@
+//     Copyright Toru Niina 2017.
+// Distributed under the MIT License.
+#ifndef TOML11_RESULT_H
+#define TOML11_RESULT_H
+#include <type_traits>
+#include <stdexcept>
+#include <utility>
+#include <new>
+#include <string>
+#include <sstream>
+#include <cassert>
+
+namespace toml
+{
+
+#if __cplusplus >= 201703L
+
+template<typename F, typename ... Args>
+using return_type_of_t = std::invoke_result_t<F, Args...>;
+
+#else
+// result_of is deprecated after C++17
+template<typename F, typename ... Args>
+using return_type_of_t = typename std::result_of<F(Args...)>::type;
+
+#endif
+
+
+template<typename T>
+struct success
+{
+    using value_type = T;
+    value_type value;
+
+    explicit success(const value_type& v)
+        noexcept(std::is_nothrow_copy_constructible<value_type>::value)
+        : value(v)
+    {}
+    explicit success(value_type&& v)
+        noexcept(std::is_nothrow_move_constructible<value_type>::value)
+        : value(std::move(v))
+    {}
+
+    template<typename U>
+    explicit success(U&& v): value(std::forward<U>(v)) {}
+
+    template<typename U>
+    explicit success(const success<U>& v): value(v.value) {}
+    template<typename U>
+    explicit success(success<U>&& v): value(std::move(v.value)) {}
+
+    ~success() = default;
+    success(const success&) = default;
+    success(success&&)      = default;
+    success& operator=(const success&) = default;
+    success& operator=(success&&)      = default;
+};
+
+template<typename T>
+struct failure
+{
+    using value_type = T;
+    value_type value;
+
+    explicit failure(const value_type& v)
+        noexcept(std::is_nothrow_copy_constructible<value_type>::value)
+        : value(v)
+    {}
+    explicit failure(value_type&& v)
+        noexcept(std::is_nothrow_move_constructible<value_type>::value)
+        : value(std::move(v))
+    {}
+
+    template<typename U>
+    explicit failure(U&& v): value(std::forward<U>(v)) {}
+
+    template<typename U>
+    explicit failure(const failure<U>& v): value(v.value) {}
+    template<typename U>
+    explicit failure(failure<U>&& v): value(std::move(v.value)) {}
+
+    ~failure() = default;
+    failure(const failure&) = default;
+    failure(failure&&)      = default;
+    failure& operator=(const failure&) = default;
+    failure& operator=(failure&&)      = default;
+};
+
+template<typename T>
+success<typename std::remove_cv<typename std::remove_reference<T>::type>::type>
+ok(T&& v)
+{
+    return success<
+        typename std::remove_cv<typename std::remove_reference<T>::type>::type
+        >(std::forward<T>(v));
+}
+template<typename T>
+failure<typename std::remove_cv<typename std::remove_reference<T>::type>::type>
+err(T&& v)
+{
+    return failure<
+        typename std::remove_cv<typename std::remove_reference<T>::type>::type
+        >(std::forward<T>(v));
+}
+
+inline success<std::string> ok(const char* literal)
+{
+    return success<std::string>(std::string(literal));
+}
+inline failure<std::string> err(const char* literal)
+{
+    return failure<std::string>(std::string(literal));
+}
+
+
+template<typename T, typename E>
+struct result
+{
+    using value_type = T;
+    using error_type = E;
+    using success_type = success<value_type>;
+    using failure_type = failure<error_type>;
+
+    result(const success_type& s): is_ok_(true)
+    {
+        auto tmp = ::new(std::addressof(this->succ)) success_type(s);
+        assert(tmp == std::addressof(this->succ));
+    }
+    result(const failure_type& f): is_ok_(false)
+    {
+        auto tmp = ::new(std::addressof(this->fail)) failure_type(f);
+        assert(tmp == std::addressof(this->fail));
+    }
+    result(success_type&& s): is_ok_(true)
+    {
+        auto tmp = ::new(std::addressof(this->succ)) success_type(std::move(s));
+        assert(tmp == std::addressof(this->succ));
+    }
+    result(failure_type&& f): is_ok_(false)
+    {
+        auto tmp = ::new(std::addressof(this->fail)) failure_type(std::move(f));
+        assert(tmp == std::addressof(this->fail));
+    }
+
+    template<typename U>
+    result(const success<U>& s): is_ok_(true)
+    {
+        auto tmp = ::new(std::addressof(this->succ)) success_type(s.value);
+        assert(tmp == std::addressof(this->succ));
+    }
+    template<typename U>
+    result(const failure<U>& f): is_ok_(false)
+    {
+        auto tmp = ::new(std::addressof(this->fail)) failure_type(f.value);
+        assert(tmp == std::addressof(this->fail));
+    }
+    template<typename U>
+    result(success<U>&& s): is_ok_(true)
+    {
+        auto tmp = ::new(std::addressof(this->succ)) success_type(std::move(s.value));
+        assert(tmp == std::addressof(this->succ));
+    }
+    template<typename U>
+    result(failure<U>&& f): is_ok_(false)
+    {
+        auto tmp = ::new(std::addressof(this->fail)) failure_type(std::move(f.value));
+        assert(tmp == std::addressof(this->fail));
+    }
+
+    result& operator=(const success_type& s)
+    {
+        this->cleanup();
+        this->is_ok_ = true;
+        auto tmp = ::new(std::addressof(this->succ)) success_type(s);
+        assert(tmp == std::addressof(this->succ));
+        return *this;
+    }
+    result& operator=(const failure_type& f)
+    {
+        this->cleanup();
+        this->is_ok_ = false;
+        auto tmp = ::new(std::addressof(this->fail)) failure_type(f);
+        assert(tmp == std::addressof(this->fail));
+        return *this;
+    }
+    result& operator=(success_type&& s)
+    {
+        this->cleanup();
+        this->is_ok_ = true;
+        auto tmp = ::new(std::addressof(this->succ)) success_type(std::move(s));
+        assert(tmp == std::addressof(this->succ));
+        return *this;
+    }
+    result& operator=(failure_type&& f)
+    {
+        this->cleanup();
+        this->is_ok_ = false;
+        auto tmp = ::new(std::addressof(this->fail)) failure_type(std::move(f));
+        assert(tmp == std::addressof(this->fail));
+        return *this;
+    }
+
+    template<typename U>
+    result& operator=(const success<U>& s)
+    {
+        this->cleanup();
+        this->is_ok_ = true;
+        auto tmp = ::new(std::addressof(this->succ)) success_type(s.value);
+        assert(tmp == std::addressof(this->succ));
+        return *this;
+    }
+    template<typename U>
+    result& operator=(const failure<U>& f)
+    {
+        this->cleanup();
+        this->is_ok_ = false;
+        auto tmp = ::new(std::addressof(this->fail)) failure_type(f.value);
+        assert(tmp == std::addressof(this->fail));
+        return *this;
+    }
+    template<typename U>
+    result& operator=(success<U>&& s)
+    {
+        this->cleanup();
+        this->is_ok_ = true;
+        auto tmp = ::new(std::addressof(this->succ)) success_type(std::move(s.value));
+        assert(tmp == std::addressof(this->succ));
+        return *this;
+    }
+    template<typename U>
+    result& operator=(failure<U>&& f)
+    {
+        this->cleanup();
+        this->is_ok_ = false;
+        auto tmp = ::new(std::addressof(this->fail)) failure_type(std::move(f.value));
+        assert(tmp == std::addressof(this->fail));
+        return *this;
+    }
+
+    ~result() noexcept {this->cleanup();}
+
+    result(const result& other): is_ok_(other.is_ok())
+    {
+        if(other.is_ok())
+        {
+            auto tmp = ::new(std::addressof(this->succ)) success_type(other.as_ok());
+            assert(tmp == std::addressof(this->succ));
+        }
+        else
+        {
+            auto tmp = ::new(std::addressof(this->fail)) failure_type(other.as_err());
+            assert(tmp == std::addressof(this->fail));
+        }
+    }
+    result(result&& other): is_ok_(other.is_ok())
+    {
+        if(other.is_ok())
+        {
+            auto tmp = ::new(std::addressof(this->succ)) success_type(std::move(other.as_ok()));
+            assert(tmp == std::addressof(this->succ));
+        }
+        else
+        {
+            auto tmp = ::new(std::addressof(this->fail)) failure_type(std::move(other.as_err()));
+            assert(tmp == std::addressof(this->fail));
+        }
+    }
+
+    template<typename U, typename F>
+    result(const result<U, F>& other): is_ok_(other.is_ok())
+    {
+        if(other.is_ok())
+        {
+            auto tmp = ::new(std::addressof(this->succ)) success_type(other.as_ok());
+            assert(tmp == std::addressof(this->succ));
+        }
+        else
+        {
+            auto tmp = ::new(std::addressof(this->fail)) failure_type(other.as_err());
+            assert(tmp == std::addressof(this->fail));
+        }
+    }
+    template<typename U, typename F>
+    result(result<U, F>&& other): is_ok_(other.is_ok())
+    {
+        if(other.is_ok())
+        {
+            auto tmp = ::new(std::addressof(this->succ)) success_type(std::move(other.as_ok()));
+            assert(tmp == std::addressof(this->succ));
+        }
+        else
+        {
+            auto tmp = ::new(std::addressof(this->fail)) failure_type(std::move(other.as_err()));
+            assert(tmp == std::addressof(this->fail));
+        }
+    }
+
+    result& operator=(const result& other)
+    {
+        this->cleanup();
+        if(other.is_ok())
+        {
+            auto tmp = ::new(std::addressof(this->succ)) success_type(other.as_ok());
+            assert(tmp == std::addressof(this->succ));
+        }
+        else
+        {
+            auto tmp = ::new(std::addressof(this->fail)) failure_type(other.as_err());
+            assert(tmp == std::addressof(this->fail));
+        }
+        is_ok_ = other.is_ok();
+        return *this;
+    }
+    result& operator=(result&& other)
+    {
+        this->cleanup();
+        if(other.is_ok())
+        {
+            auto tmp = ::new(std::addressof(this->succ)) success_type(std::move(other.as_ok()));
+            assert(tmp == std::addressof(this->succ));
+        }
+        else
+        {
+            auto tmp = ::new(std::addressof(this->fail)) failure_type(std::move(other.as_err()));
+            assert(tmp == std::addressof(this->fail));
+        }
+        is_ok_ = other.is_ok();
+        return *this;
+    }
+
+    template<typename U, typename F>
+    result& operator=(const result<U, F>& other)
+    {
+        this->cleanup();
+        if(other.is_ok())
+        {
+            auto tmp = ::new(std::addressof(this->succ)) success_type(other.as_ok());
+            assert(tmp == std::addressof(this->succ));
+        }
+        else
+        {
+            auto tmp = ::new(std::addressof(this->fail)) failure_type(other.as_err());
+            assert(tmp == std::addressof(this->fail));
+        }
+        is_ok_ = other.is_ok();
+        return *this;
+    }
+    template<typename U, typename F>
+    result& operator=(result<U, F>&& other)
+    {
+        this->cleanup();
+        if(other.is_ok())
+        {
+            auto tmp = ::new(std::addressof(this->succ)) success_type(std::move(other.as_ok()));
+            assert(tmp == std::addressof(this->succ));
+        }
+        else
+        {
+            auto tmp = ::new(std::addressof(this->fail)) failure_type(std::move(other.as_err()));
+            assert(tmp == std::addressof(this->fail));
+        }
+        is_ok_ = other.is_ok();
+        return *this;
+    }
+
+    bool is_ok()  const noexcept {return is_ok_;}
+    bool is_err() const noexcept {return !is_ok_;}
+
+    operator bool() const noexcept {return is_ok_;}
+
+    value_type&       unwrap() &
+    {
+        if(is_err())
+        {
+            throw std::runtime_error("toml::result: bad unwrap: " +
+                                     format_error(this->as_err()));
+        }
+        return this->succ.value;
+    }
+    value_type const& unwrap() const&
+    {
+        if(is_err())
+        {
+            throw std::runtime_error("toml::result: bad unwrap: " +
+                                     format_error(this->as_err()));
+        }
+        return this->succ.value;
+    }
+    value_type&&      unwrap() &&
+    {
+        if(is_err())
+        {
+            throw std::runtime_error("toml::result: bad unwrap: " +
+                                     format_error(this->as_err()));
+        }
+        return std::move(this->succ.value);
+    }
+
+    template<typename U>
+    value_type&       unwrap_or(U& opt) &
+    {
+        if(is_err()) {return opt;}
+        return this->succ.value;
+    }
+    template<typename U>
+    value_type const& unwrap_or(U const& opt) const&
+    {
+        if(is_err()) {return opt;}
+        return this->succ.value;
+    }
+    template<typename U>
+    value_type&&      unwrap_or(U&& opt) &&
+    {
+        if(is_err()) {return std::move(opt);}
+        return std::move(this->succ.value);
+    }
+
+    error_type&       unwrap_err() &
+    {
+        if(is_ok()) {throw std::runtime_error("toml::result: bad unwrap_err");}
+        return this->fail.value;
+    }
+    error_type const& unwrap_err() const&
+    {
+        if(is_ok()) {throw std::runtime_error("toml::result: bad unwrap_err");}
+        return this->fail.value;
+    }
+    error_type&&      unwrap_err() &&
+    {
+        if(is_ok()) {throw std::runtime_error("toml::result: bad unwrap_err");}
+        return std::move(this->fail.value);
+    }
+
+    value_type&       as_ok() &      noexcept {return this->succ.value;}
+    value_type const& as_ok() const& noexcept {return this->succ.value;}
+    value_type&&      as_ok() &&     noexcept {return std::move(this->succ.value);}
+
+    error_type&       as_err() &      noexcept {return this->fail.value;}
+    error_type const& as_err() const& noexcept {return this->fail.value;}
+    error_type&&      as_err() &&     noexcept {return std::move(this->fail.value);}
+
+
+    // prerequisities
+    // F: T -> U
+    // retval: result<U, E>
+    template<typename F>
+    result<return_type_of_t<F, value_type&>, error_type>
+    map(F&& f) &
+    {
+        if(this->is_ok()){return ok(f(this->as_ok()));}
+        return err(this->as_err());
+    }
+    template<typename F>
+    result<return_type_of_t<F, value_type const&>, error_type>
+    map(F&& f) const&
+    {
+        if(this->is_ok()){return ok(f(this->as_ok()));}
+        return err(this->as_err());
+    }
+    template<typename F>
+    result<return_type_of_t<F, value_type &&>, error_type>
+    map(F&& f) &&
+    {
+        if(this->is_ok()){return ok(f(std::move(this->as_ok())));}
+        return err(std::move(this->as_err()));
+    }
+
+    // prerequisities
+    // F: E -> F
+    // retval: result<T, F>
+    template<typename F>
+    result<value_type, return_type_of_t<F, error_type&>>
+    map_err(F&& f) &
+    {
+        if(this->is_err()){return err(f(this->as_err()));}
+        return ok(this->as_ok());
+    }
+    template<typename F>
+    result<value_type, return_type_of_t<F, error_type const&>>
+    map_err(F&& f) const&
+    {
+        if(this->is_err()){return err(f(this->as_err()));}
+        return ok(this->as_ok());
+    }
+    template<typename F>
+    result<value_type, return_type_of_t<F, error_type&&>>
+    map_err(F&& f) &&
+    {
+        if(this->is_err()){return err(f(std::move(this->as_err())));}
+        return ok(std::move(this->as_ok()));
+    }
+
+    // prerequisities
+    // F: T -> U
+    // retval: U
+    template<typename F, typename U>
+    return_type_of_t<F, value_type&>
+    map_or_else(F&& f, U&& opt) &
+    {
+        if(this->is_err()){return std::forward<U>(opt);}
+        return f(this->as_ok());
+    }
+    template<typename F, typename U>
+    return_type_of_t<F, value_type const&>
+    map_or_else(F&& f, U&& opt) const&
+    {
+        if(this->is_err()){return std::forward<U>(opt);}
+        return f(this->as_ok());
+    }
+    template<typename F, typename U>
+    return_type_of_t<F, value_type&&>
+    map_or_else(F&& f, U&& opt) &&
+    {
+        if(this->is_err()){return std::forward<U>(opt);}
+        return f(std::move(this->as_ok()));
+    }
+
+    // prerequisities
+    // F: E -> U
+    // retval: U
+    template<typename F, typename U>
+    return_type_of_t<F, error_type&>
+    map_err_or_else(F&& f, U&& opt) &
+    {
+        if(this->is_ok()){return std::forward<U>(opt);}
+        return f(this->as_err());
+    }
+    template<typename F, typename U>
+    return_type_of_t<F, error_type const&>
+    map_err_or_else(F&& f, U&& opt) const&
+    {
+        if(this->is_ok()){return std::forward<U>(opt);}
+        return f(this->as_err());
+    }
+    template<typename F, typename U>
+    return_type_of_t<F, error_type&&>
+    map_err_or_else(F&& f, U&& opt) &&
+    {
+        if(this->is_ok()){return std::forward<U>(opt);}
+        return f(std::move(this->as_err()));
+    }
+
+    // prerequisities:
+    // F: func T -> U
+    // toml::err(error_type) should be convertible to U.
+    // normally, type U is another result<S, F> and E is convertible to F
+    template<typename F>
+    return_type_of_t<F, value_type&>
+    and_then(F&& f) &
+    {
+        if(this->is_ok()){return f(this->as_ok());}
+        return err(this->as_err());
+    }
+    template<typename F>
+    return_type_of_t<F, value_type const&>
+    and_then(F&& f) const&
+    {
+        if(this->is_ok()){return f(this->as_ok());}
+        return err(this->as_err());
+    }
+    template<typename F>
+    return_type_of_t<F, value_type&&>
+    and_then(F&& f) &&
+    {
+        if(this->is_ok()){return f(std::move(this->as_ok()));}
+        return err(std::move(this->as_err()));
+    }
+
+    // prerequisities:
+    // F: func E -> U
+    // toml::ok(value_type) should be convertible to U.
+    // normally, type U is another result<S, F> and T is convertible to S
+    template<typename F>
+    return_type_of_t<F, error_type&>
+    or_else(F&& f) &
+    {
+        if(this->is_err()){return f(this->as_err());}
+        return ok(this->as_ok());
+    }
+    template<typename F>
+    return_type_of_t<F, error_type const&>
+    or_else(F&& f) const&
+    {
+        if(this->is_err()){return f(this->as_err());}
+        return ok(this->as_ok());
+    }
+    template<typename F>
+    return_type_of_t<F, error_type&&>
+    or_else(F&& f) &&
+    {
+        if(this->is_err()){return f(std::move(this->as_err()));}
+        return ok(std::move(this->as_ok()));
+    }
+
+    void swap(result<T, E>& other)
+    {
+        result<T, E> tmp(std::move(*this));
+        *this = std::move(other);
+        other = std::move(tmp);
+        return ;
+    }
+
+  private:
+
+    static std::string format_error(std::exception const& excpt)
+    {
+        return std::string(excpt.what());
+    }
+    template<typename U, typename std::enable_if<!std::is_base_of<
+        std::exception, U>::value, std::nullptr_t>::type = nullptr>
+    static std::string format_error(U const& others)
+    {
+        std::ostringstream oss; oss << others;
+        return oss.str();
+    }
+
+    void cleanup() noexcept
+    {
+        if(this->is_ok_) {this->succ.~success_type();}
+        else             {this->fail.~failure_type();}
+        return;
+    }
+
+  private:
+
+    bool      is_ok_;
+    union
+    {
+        success_type succ;
+        failure_type fail;
+    };
+};
+
+template<typename T, typename E>
+void swap(result<T, E>& lhs, result<T, E>& rhs)
+{
+    lhs.swap(rhs);
+    return;
+}
+
+} // toml11
+#endif// TOML11_RESULT_H

toml/storage.hpp

@@ -0,0 +1,44 @@
+//     Copyright Toru Niina 2017.
+// Distributed under the MIT License.
+#ifndef TOML11_STORAGE_HPP
+#define TOML11_STORAGE_HPP
+#include "utility.hpp"
+
+namespace toml
+{
+namespace detail
+{
+
+// this contains pointer and deep-copy the content if copied.
+// to avoid recursive pointer.
+template<typename T>
+struct storage
+{
+    using value_type = T;
+
+    storage(value_type const& v): ptr(toml::make_unique<T>(v)) {}
+    storage(value_type&&      v): ptr(toml::make_unique<T>(std::move(v))) {}
+    ~storage() = default;
+
+    storage(const storage& rhs): ptr(toml::make_unique<T>(*rhs.ptr)) {}
+    storage& operator=(const storage& rhs)
+    {
+        this->ptr = toml::make_unique<T>(*rhs.ptr);
+        return *this;
+    }
+    storage(storage&&) = default;
+    storage& operator=(storage&&) = default;
+
+    bool is_ok() const noexcept {return static_cast<bool>(ptr);}
+
+    value_type&       value() &      noexcept {return *ptr;}
+    value_type const& value() const& noexcept {return *ptr;}
+    value_type&&      value() &&     noexcept {return std::move(*ptr);}
+
+  private:
+    std::unique_ptr<value_type> ptr;
+};
+
+} // detail
+} // toml
+#endif// TOML11_STORAGE_HPP

toml/string.hpp

@@ -0,0 +1,133 @@
+//     Copyright Toru Niina 2017.
+// Distributed under the MIT License.
+#ifndef TOML11_STRING_H
+#define TOML11_STRING_H
+#include <string>
+#include <cstdint>
+
+namespace toml
+{
+
+enum class string_t : std::uint8_t
+{
+    basic   = 0,
+    literal = 1,
+};
+
+struct string
+{
+    string()  = default;
+    ~string() = default;
+    string(const string& s) = default;
+    string(string&& s)      = default;
+    string& operator=(const string& s) = default;
+    string& operator=(string&& s)      = default;
+
+    string(const std::string& s): kind(string_t::basic), str(s){}
+    string(const std::string& s, string_t k):   kind(k), str(s){}
+    string(const char* s):        kind(string_t::basic), str(s){}
+    string(const char* s,        string_t k):   kind(k), str(s){}
+
+    string(std::string&& s): kind(string_t::basic), str(std::move(s)){}
+    string(std::string&& s, string_t k):   kind(k), str(std::move(s)){}
+
+    string& operator=(const std::string& s)
+    {kind = string_t::basic; str = s; return *this;}
+    string& operator=(std::string&& s)
+    {kind = string_t::basic; str = std::move(s); return *this;}
+
+    operator std::string&       () &      noexcept {return str;}
+    operator std::string const& () const& noexcept {return str;}
+    operator std::string&&      () &&     noexcept {return std::move(str);}
+
+    string_t    kind;
+    std::string str;
+};
+
+inline bool operator==(const string& lhs, const string& rhs)
+{
+    return lhs.kind == rhs.kind && lhs.str == rhs.str;
+}
+inline bool operator!=(const string& lhs, const string& rhs)
+{
+    return !(lhs == rhs);
+}
+inline bool operator<(const string& lhs, const string& rhs)
+{
+    return (lhs.kind == rhs.kind) ? (lhs.str < rhs.str) : (lhs.kind < rhs.kind);
+}
+inline bool operator>(const string& lhs, const string& rhs)
+{
+    return rhs < lhs;
+}
+inline bool operator<=(const string& lhs, const string& rhs)
+{
+    return !(rhs < lhs);
+}
+inline bool operator>=(const string& lhs, const string& rhs)
+{
+    return !(lhs < rhs);
+}
+
+inline bool
+operator==(const string& lhs, const std::string& rhs) {return lhs.str == rhs;}
+inline bool
+operator!=(const string& lhs, const std::string& rhs) {return lhs.str != rhs;}
+inline bool
+operator< (const string& lhs, const std::string& rhs) {return lhs.str <  rhs;}
+inline bool
+operator> (const string& lhs, const std::string& rhs) {return lhs.str >  rhs;}
+inline bool
+operator<=(const string& lhs, const std::string& rhs) {return lhs.str <= rhs;}
+inline bool
+operator>=(const string& lhs, const std::string& rhs) {return lhs.str >= rhs;}
+
+inline bool
+operator==(const std::string& lhs, const string& rhs) {return lhs == rhs.str;}
+inline bool
+operator!=(const std::string& lhs, const string& rhs) {return lhs != rhs.str;}
+inline bool
+operator< (const std::string& lhs, const string& rhs) {return lhs <  rhs.str;}
+inline bool
+operator> (const std::string& lhs, const string& rhs) {return lhs >  rhs.str;}
+inline bool
+operator<=(const std::string& lhs, const string& rhs) {return lhs <= rhs.str;}
+inline bool
+operator>=(const std::string& lhs, const string& rhs) {return lhs >= rhs.str;}
+
+inline bool
+operator==(const string& lhs, const char* rhs) {return lhs.str == std::string(rhs);}
+inline bool
+operator!=(const string& lhs, const char* rhs) {return lhs.str != std::string(rhs);}
+inline bool
+operator< (const string& lhs, const char* rhs) {return lhs.str <  std::string(rhs);}
+inline bool
+operator> (const string& lhs, const char* rhs) {return lhs.str >  std::string(rhs);}
+inline bool
+operator<=(const string& lhs, const char* rhs) {return lhs.str <= std::string(rhs);}
+inline bool
+operator>=(const string& lhs, const char* rhs) {return lhs.str >= std::string(rhs);}
+
+inline bool
+operator==(const char* lhs, const string& rhs) {return std::string(lhs) == rhs.str;}
+inline bool
+operator!=(const char* lhs, const string& rhs) {return std::string(lhs) != rhs.str;}
+inline bool
+operator< (const char* lhs, const string& rhs) {return std::string(lhs) <  rhs.str;}
+inline bool
+operator> (const char* lhs, const string& rhs) {return std::string(lhs) >  rhs.str;}
+inline bool
+operator<=(const char* lhs, const string& rhs) {return std::string(lhs) <= rhs.str;}
+inline bool
+operator>=(const char* lhs, const string& rhs) {return std::string(lhs) >= rhs.str;}
+
+template<typename charT, typename traits>
+std::basic_ostream<charT, traits>&
+operator<<(std::basic_ostream<charT, traits>& os, const string& str)
+{
+    os << str.str;
+    return os;
+}
+
+} // toml
+#endif// TOML11_STRING_H

toml/to_toml.hpp

@@ -1,3 +1,5 @@
+//     Copyright Toru Niina 2017.
+// Distributed under the MIT License.
 #ifndef TOML11_TO_TOML
 #define TOML11_TO_TOML
 #include "value.hpp"
@@ -5,47 +7,36 @@
 namespace toml
 {
 
-template<typename T, toml::value_t vT = toml::detail::check_type<T>(),
-         typename std::enable_if<(vT != toml::value_t::Unknown &&
-         vT != value_t::Empty), std::nullptr_t>::type = nullptr>
-inline toml::value to_toml(T&& x)
+template<typename T>
+inline value to_toml(T&& x)
 {
-    return toml::value(std::forward<T>(x));
-}
-
-template<typename T, toml::value_t vT = toml::detail::check_type<T>(),
-         typename std::enable_if<(vT == toml::value_t::Unknown) &&
-         (!toml::detail::is_map<T>::value) &&
-         toml::detail::is_container<T>::value, std::nullptr_t>::type = nullptr>
-toml::value to_toml(T&& x)
-{
-    toml::Array tmp; tmp.reserve(std::distance(std::begin(x), std::end(x)));
-    for(auto iter = std::begin(x); iter != std::end(x); ++iter)
-        tmp.emplace_back(*iter);
-    return toml::value(std::move(tmp));
-}
-
-template<typename T, toml::value_t vT = toml::detail::check_type<T>(),
-         typename std::enable_if<(vT == toml::value_t::Unknown) &&
-         toml::detail::is_map<T>::value, std::nullptr_t>::type = nullptr>
-toml::value to_toml(T&& x)
-{
-    toml::Table tmp;
-    for(auto iter = std::begin(x); iter != std::end(x); ++iter)
-        tmp.emplace(iter->first, to_toml(iter->second));
-    return toml::value(std::move(tmp));
+    return value(std::forward<T>(x));
 }
 
 template<typename T>
-inline toml::value to_toml(std::initializer_list<T> init)
+inline value to_toml(T&& x, string_t kind)
 {
-    return toml::value(std::move(init));
+    return value(std::forward<T>(x), kind);
 }
 
-inline toml::value
-to_toml(std::initializer_list<std::pair<std::string, toml::value>> init)
+inline value to_toml(local_date d, local_time t)
 {
-    return toml::value(std::move(init));
+    return value(local_datetime(d, t));
+}
+inline value to_toml(local_date d, local_time t, time_offset ofs)
+{
+    return value(offset_datetime(d, t, ofs));
+}
+
+template<typename ... Ts>
+inline value to_toml(Ts&& ... xs)
+{
+    return value(toml::array{toml::value(std::forward<Ts>(xs)) ... });
+}
+
+inline value to_toml(std::initializer_list<std::pair<std::string, toml::value>> xs)
+{
+    return value(toml::table(xs.begin(), xs.end()));
 }
 
 } // toml

toml/traits.hpp

@@ -1,6 +1,11 @@
+//     Copyright Toru Niina 2017.
+// Distributed under the MIT License.
 #ifndef TOML11_TRAITS
 #define TOML11_TRAITS
 #include <type_traits>
+#include <utility>
+#include <chrono>
+#include <tuple>
 
 namespace toml
 {
@@ -58,14 +63,58 @@ struct has_resize_method : decltype(has_resize_method_impl::check<T>(nullptr)){}
 #undef decltype(...)
 #endif
 
-template<typename T>
-struct is_container : std::integral_constant<bool,
-    has_iterator<T>::value && has_value_type<T>::value>{};
+template<typename ...> struct conjunction : std::true_type{};
+template<typename T>   struct conjunction<T> : T{};
+template<typename T, typename ... Ts>
+struct conjunction<T, Ts...> :
+    std::conditional<static_cast<bool>(T::value), conjunction<Ts...>, T>::type
+{};
+
+template<typename ...> struct disjunction : std::false_type{};
+template<typename T>   struct disjunction<T> : T {};
+template<typename T, typename ... Ts>
+struct disjunction<T, Ts...> :
+    std::conditional<static_cast<bool>(T::value), T, disjunction<Ts...>>::type
+{};
 
 template<typename T>
-struct is_map : std::integral_constant<bool,
-    has_iterator<T>::value && has_key_type<T>::value &&
-    has_mapped_type<T>::value>{};
+struct negation : std::integral_constant<bool, !static_cast<bool>(T::value)>{};
+
+template<typename T> struct is_std_pair : std::false_type{};
+template<typename T1, typename T2>
+struct is_std_pair<std::pair<T1, T2>> : std::true_type{};
+
+template<typename T> struct is_std_tuple : std::false_type{};
+template<typename ... Ts>
+struct is_std_tuple<std::tuple<Ts...>> : std::true_type{};
+
+template<typename T> struct is_chrono_duration: std::false_type{};
+template<typename Rep, typename Period>
+struct is_chrono_duration<std::chrono::duration<Rep, Period>>: std::true_type{};
+
+// to use toml::get<std::tuple<T1, T2, ...>> in C++11
+template<std::size_t ... Ns> struct index_sequence{};
+
+template<typename IS, std::size_t N> struct push_back_index_sequence{};
+template<std::size_t N, std::size_t ... Ns>
+struct push_back_index_sequence<index_sequence<Ns...>, N>
+{
+    typedef index_sequence<Ns..., N> type;
+};
+
+template<std::size_t N>
+struct index_sequence_maker
+{
+    typedef typename push_back_index_sequence<
+        typename index_sequence_maker<N-1>::type, N>::type type;
+};
+template<>
+struct index_sequence_maker<0>
+{
+    typedef index_sequence<0> type;
+};
+template<std::size_t N>
+using make_index_sequence = typename index_sequence_maker<N-1>::type;
 
 }// detail
 }//toml

toml/types.hpp

@@ -0,0 +1,197 @@
+//     Copyright Toru Niina 2017.
+// Distributed under the MIT License.
+#ifndef TOML11_TYPES_H
+#define TOML11_TYPES_H
+#include "datetime.hpp"
+#include "string.hpp"
+#include "traits.hpp"
+#include <vector>
+#include <unordered_map>
+
+namespace toml
+{
+
+using character = char;
+
+class value;
+using key = std::string;
+
+using Boolean        = bool;
+using Integer        = std::int64_t;
+using Float          = double;
+using String         = ::toml::string;
+using Datetime       = offset_datetime;
+using OffsetDatetime = offset_datetime;
+using LocalDatetime  = local_datetime;
+using LocalDate      = local_date;
+using LocalTime      = local_time;
+using Array          = std::vector<value>;
+using Table          = std::unordered_map<key, value>;
+
+// alias for snake_case, consistency with STL/Boost, toml::key, toml::value
+using boolean  = Boolean;
+using integer  = Integer;
+using floating = Float;   // XXX `float` is keyword. we can't use it here
+using array    = Array;
+using table    = Table;
+
+enum class value_t : std::uint8_t
+{
+    Empty          = 0,
+    Boolean        = 1,
+    Integer        = 2,
+    Float          = 3,
+    String         = 4,
+    OffsetDatetime = 5,
+    LocalDatetime  = 6,
+    LocalDate      = 7,
+    LocalTime      = 8,
+    Array          = 9,
+    Table          = 10,
+    Unknown        = 255,
+};
+
+template<typename charT, typename traits>
+inline std::basic_ostream<charT, traits>&
+operator<<(std::basic_ostream<charT, traits>& os, value_t t)
+{
+    switch(t)
+    {
+        case toml::value_t::Boolean       : os << "boolean";         return os;
+        case toml::value_t::Integer       : os << "integer";         return os;
+        case toml::value_t::Float         : os << "float";           return os;
+        case toml::value_t::String        : os << "string";          return os;
+        case toml::value_t::OffsetDatetime: os << "offset_datetime"; return os;
+        case toml::value_t::LocalDatetime : os << "local_datetime";  return os;
+        case toml::value_t::LocalDate     : os << "local_date";      return os;
+        case toml::value_t::LocalTime     : os << "local_time";      return os;
+        case toml::value_t::Array         : os << "array";           return os;
+        case toml::value_t::Table         : os << "table";           return os;
+        case toml::value_t::Empty         : os << "empty";           return os;
+        case toml::value_t::Unknown       : os << "unknown";         return os;
+        default                           : os << "nothing";         return os;
+    }
+}
+
+template<typename charT = character, typename traits = std::char_traits<charT>,
+         typename alloc = std::allocator<charT>>
+inline std::basic_string<charT, traits, alloc> stringize(value_t t)
+{
+    std::ostringstream oss;
+    oss << t;
+    return oss.str();
+}
+
+namespace detail
+{
+
+template<typename T>
+constexpr inline value_t check_type()
+{
+    using type = typename std::remove_cv<
+                 typename std::remove_reference<T>::type
+                 >::type;
+    return std::is_same<type, toml::boolean>::value                         ? value_t::Boolean        :
+           std::is_integral<type>::value                                    ? value_t::Integer        :
+           std::is_floating_point<type>::value                              ? value_t::Float          :
+           std::is_same<type, std::string>::value                           ? value_t::String         :
+           std::is_same<type, toml::string>::value                          ? value_t::String         :
+           std::is_same<type, toml::local_date>::value                      ? value_t::LocalDate      :
+           std::is_same<type, toml::local_time>::value                      ? value_t::LocalTime      :
+           is_chrono_duration<type>::value                                  ? value_t::LocalTime      :
+           std::is_same<type, toml::local_datetime>::value                  ? value_t::LocalDatetime  :
+           std::is_same<type, toml::offset_datetime>::value                 ? value_t::OffsetDatetime :
+           std::is_same<type, std::chrono::system_clock::time_point>::value ? value_t::OffsetDatetime :
+           std::is_convertible<type, toml::array>::value                    ? value_t::Array          :
+           std::is_convertible<type, toml::table>::value                    ? value_t::Table          :
+           value_t::Unknown;
+}
+
+constexpr inline bool is_valid(value_t vt)
+{
+    return vt != value_t::Unknown;
+}
+
+template<value_t t> struct toml_default_type;
+template<> struct toml_default_type<value_t::Boolean >      {typedef boolean         type;};
+template<> struct toml_default_type<value_t::Integer >      {typedef integer         type;};
+template<> struct toml_default_type<value_t::Float   >      {typedef floating        type;};
+template<> struct toml_default_type<value_t::String  >      {typedef string          type;};
+template<> struct toml_default_type<value_t::OffsetDatetime>{typedef offset_datetime type;};
+template<> struct toml_default_type<value_t::LocalDatetime> {typedef local_datetime  type;};
+template<> struct toml_default_type<value_t::LocalDate>     {typedef local_date      type;};
+template<> struct toml_default_type<value_t::LocalTime>     {typedef local_time      type;};
+template<> struct toml_default_type<value_t::Array   >      {typedef array           type;};
+template<> struct toml_default_type<value_t::Table   >      {typedef table           type;};
+template<> struct toml_default_type<value_t::Empty   >      {typedef void            type;};
+template<> struct toml_default_type<value_t::Unknown >      {typedef void            type;};
+
+template<typename T> struct toml_value_t      {static constexpr value_t value = value_t::Unknown       ;};
+template<> struct toml_value_t<Boolean       >{static constexpr value_t value = value_t::Boolean       ;};
+template<> struct toml_value_t<Integer       >{static constexpr value_t value = value_t::Integer       ;};
+template<> struct toml_value_t<Float         >{static constexpr value_t value = value_t::Float         ;};
+template<> struct toml_value_t<String        >{static constexpr value_t value = value_t::String        ;};
+template<> struct toml_value_t<OffsetDatetime>{static constexpr value_t value = value_t::OffsetDatetime;};
+template<> struct toml_value_t<LocalDatetime >{static constexpr value_t value = value_t::LocalDatetime ;};
+template<> struct toml_value_t<LocalDate     >{static constexpr value_t value = value_t::LocalDate     ;};
+template<> struct toml_value_t<LocalTime     >{static constexpr value_t value = value_t::LocalTime     ;};
+template<> struct toml_value_t<Array         >{static constexpr value_t value = value_t::Array         ;};
+template<> struct toml_value_t<Table         >{static constexpr value_t value = value_t::Table         ;};
+template<typename T> constexpr value_t toml_value_t<T>::value;
+constexpr value_t toml_value_t<Boolean       >::value;
+constexpr value_t toml_value_t<Integer       >::value;
+constexpr value_t toml_value_t<Float         >::value;
+constexpr value_t toml_value_t<String        >::value;
+constexpr value_t toml_value_t<OffsetDatetime>::value;
+constexpr value_t toml_value_t<LocalDatetime >::value;
+constexpr value_t toml_value_t<LocalDate     >::value;
+constexpr value_t toml_value_t<LocalTime     >::value;
+constexpr value_t toml_value_t<Array         >::value;
+constexpr value_t toml_value_t<Table         >::value;
+
+template<typename T>
+struct is_exact_toml_type : disjunction<
+    std::is_same<T, Boolean >,
+    std::is_same<T, Integer >,
+    std::is_same<T, Float   >,
+    std::is_same<T, String  >,
+    std::is_same<T, offset_datetime>,
+    std::is_same<T, local_datetime>,
+    std::is_same<T, local_date>,
+    std::is_same<T, local_time>,
+    std::is_same<T, Array   >,
+    std::is_same<T, Table   >
+    >{};
+template<typename T> struct is_exact_toml_type<T&>               : is_exact_toml_type<T>{};
+template<typename T> struct is_exact_toml_type<T const&>         : is_exact_toml_type<T>{};
+template<typename T> struct is_exact_toml_type<T volatile&>      : is_exact_toml_type<T>{};
+template<typename T> struct is_exact_toml_type<T const volatile&>: is_exact_toml_type<T>{};
+
+template<typename T>
+struct is_map : conjunction<
+    has_iterator<T>,
+    has_value_type<T>,
+    has_key_type<T>,
+    has_mapped_type<T>
+    >{};
+template<typename T> struct is_map<T&>                : is_map<T>{};
+template<typename T> struct is_map<T const&>          : is_map<T>{};
+template<typename T> struct is_map<T volatile&>       : is_map<T>{};
+template<typename T> struct is_map<T const volatile&> : is_map<T>{};
+
+template<typename T>
+struct is_container : conjunction<
+    negation<is_map<T>>,
+    negation<std::is_same<T, std::string>>,
+    has_iterator<T>,
+    has_value_type<T>
+    >{};
+template<typename T> struct is_container<T&>                : is_container<T>{};
+template<typename T> struct is_container<T const&>          : is_container<T>{};
+template<typename T> struct is_container<T volatile&>       : is_container<T>{};
+template<typename T> struct is_container<T const volatile&> : is_container<T>{};
+
+
+} // detail
+} // toml
+#endif// TOML11_TYPES_H

toml/utility.hpp

@@ -1,8 +1,11 @@
+//     Copyright Toru Niina 2017.
+// Distributed under the MIT License.
 #ifndef TOML11_UTILITY
 #define TOML11_UTILITY
 #include "traits.hpp"
 #include <utility>
 #include <memory>
+#include <sstream>
 
 namespace toml
 {
@@ -30,7 +33,7 @@ inline void resize_impl(T& container, std::size_t N, std::false_type)
     else throw std::invalid_argument("not resizable type");
 }
 
-}
+} // detail
 
 template<typename T>
 inline void resize(T& container, std::size_t N)
@@ -39,5 +42,38 @@ inline void resize(T& container, std::size_t N)
     else return detail::resize_impl(container, N, detail::has_resize_method<T>());
 }
 
+namespace detail
+{
+inline std::string concat_to_string_impl(std::ostringstream& oss)
+{
+    return oss.str();
+}
+template<typename T, typename ... Ts>
+std::string concat_to_string_impl(std::ostringstream& oss, T&& head, Ts&& ... tail)
+{
+    oss << std::forward<T>(head);
+    return concat_to_string_impl(oss, std::forward<Ts>(tail) ... );
+}
+} // detail
+
+template<typename ... Ts>
+std::string concat_to_string(Ts&& ... args)
+{
+    std::ostringstream oss;
+    oss << std::boolalpha << std::fixed;
+    return detail::concat_to_string_impl(oss, std::forward<Ts>(args) ...);
+}
+
+template<typename T, typename U>
+T from_string(const std::string& str, U&& opt)
+{
+    T v(std::forward<U>(opt));
+    std::istringstream iss(str);
+    iss >> v;
+    return v;
+}
+
+
+
 }// toml
 #endif // TOML11_UTILITY