add simple acceptors

tests/test_acceptor.cpp

@@ -0,0 +1,65 @@
+#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 <iostream>
+
+template<typename T>
+struct wrapping_iterator
+{
+    typedef T value_type;
+    typedef std::size_t difference_type;
+    typedef value_type* pointer;
+    typedef value_type& reference;
+    typedef std::forward_iterator_tag iterator_category;
+
+    wrapping_iterator(value_type v) : value_(v){}
+
+    value_type operator*(){return value_;}
+
+    wrapping_iterator operator++()   {advanced = true;return *this;}
+    wrapping_iterator operator++(int){advanced = true;return *this;}
+
+    operator bool() const {return advanced;}
+
+  private:
+
+    bool advanced = false;
+    value_type value_;
+};
+
+template<typename T>
+inline wrapping_iterator<T> wrap(T v) {return wrapping_iterator<T>(v);}
+
+BOOST_AUTO_TEST_CASE(test_conditions)
+{
+    BOOST_CHECK( toml::is_space::invoke(wrap(' ')));
+    BOOST_CHECK(!toml::is_space::invoke(wrap('a')));
+
+    BOOST_CHECK( toml::is_tab::invoke(wrap('\t')));
+    BOOST_CHECK(!toml::is_tab::invoke(wrap('a')));
+
+    for(char c = '0'; c <= '9'; ++c)
+        BOOST_CHECK(toml::is_number::invoke(wrap(c)));
+    BOOST_CHECK(!toml::is_number::invoke(wrap('a')));
+
+    for(char c = 'a'; c <= 'z'; ++c)
+        BOOST_CHECK(toml::is_lowercase::invoke(wrap(c)));
+    BOOST_CHECK(!toml::is_lowercase::invoke(wrap('A')));
+
+    for(char c = 'A'; c <= 'Z'; ++c)
+        BOOST_CHECK(toml::is_uppercase::invoke(wrap(c)));
+    BOOST_CHECK(!toml::is_uppercase::invoke(wrap('a')));
+
+    BOOST_CHECK(toml::is_whitespace::invoke(wrap(' ')));
+    BOOST_CHECK(toml::is_whitespace::invoke(wrap('\t')));
+
+    std::string barekey("hoge1-piyo2_fuga3");
+    BOOST_CHECK(toml::is_barekey::invoke(barekey.cbegin()) == barekey.cend());
+    std::string partial("hoge1.piyo2_fuga3");
+    BOOST_CHECK(toml::is_barekey::invoke(partial.cbegin()) == partial.cbegin()+5);
+}