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add result<T, E> struct to handle errors

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aiming later updates and refactoring of parsers
This commit is contained in:
ToruNiina
2018-12-02 18:01:37 +09:00
parent f326334147
commit 6c0a12148b
5 changed files with 848 additions and 363 deletions
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111
tests/test_result.cpp Normal file
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@@ -0,0 +1,111 @@
#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_TEST(!!result);
BOOST_TEST(result.is_ok());
BOOST_TEST(!result.is_err());
BOOST_TEST(result.unwrap() == 42);
}
{
const auto s = toml::ok(42);
toml::result<int, std::string> result(s);
BOOST_TEST(!!result);
BOOST_TEST(result.is_ok());
BOOST_TEST(!result.is_err());
BOOST_TEST(result.unwrap() == 42);
}
{
toml::result<int, std::string> result(toml::ok(42));
BOOST_TEST(!!result);
BOOST_TEST(result.is_ok());
BOOST_TEST(!result.is_err());
BOOST_TEST(result.unwrap() == 42);
}
{
auto f = toml::err<std::string>("foobar");
toml::result<int, std::string> result(f);
BOOST_TEST(!result);
BOOST_TEST(!result.is_ok());
BOOST_TEST(result.is_err());
BOOST_TEST(result.unwrap_err() == "foobar");
}
{
const auto f = toml::err<std::string>("foobar");
toml::result<int, std::string> result(f);
BOOST_TEST(!result);
BOOST_TEST(!result.is_ok());
BOOST_TEST(result.is_err());
BOOST_TEST(result.unwrap_err() == "foobar");
}
{
toml::result<int, std::string> result(toml::err<std::string>("foobar"));
BOOST_TEST(!result);
BOOST_TEST(!result.is_ok());
BOOST_TEST(result.is_err());
BOOST_TEST(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_TEST(!!result);
BOOST_TEST(result.is_ok());
BOOST_TEST(!result.is_err());
BOOST_TEST(result.unwrap() == 42);
}
{
toml::result<int, std::string> result(toml::err<std::string>("foobar"));
auto s = toml::ok(42);
result = s;
BOOST_TEST(!!result);
BOOST_TEST(result.is_ok());
BOOST_TEST(!result.is_err());
BOOST_TEST(result.unwrap() == 42);
}
{
toml::result<int, std::string> result(toml::err<std::string>("foobar"));
const auto s = toml::ok(42);
result = s;
BOOST_TEST(!!result);
BOOST_TEST(result.is_ok());
BOOST_TEST(!result.is_err());
BOOST_TEST(result.unwrap() == 42);
}
{
toml::result<int, std::string> result(toml::err<std::string>("foobar"));
result = toml::err<std::string>("hoge");
BOOST_TEST(!result);
BOOST_TEST(!result.is_ok());
BOOST_TEST(result.is_err());
BOOST_TEST(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_TEST(!result);
BOOST_TEST(!result.is_ok());
BOOST_TEST(result.is_err());
BOOST_TEST(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_TEST(!result);
BOOST_TEST(!result.is_ok());
BOOST_TEST(result.is_err());
BOOST_TEST(result.unwrap_err() == "hoge");
}
}