[#lit] [section lit] [h1 Synopsis] template <class C> struct lit; This is a [link parser parser]. [table Arguments [[Name] [Type]] [[`C`] [[link boxed_value boxed] character value]] ] [h1 Description] Parser accepting only the `C` character. The result of parsing is the accepted character. [h1 Header] #include <boost/metaparse/lit.hpp> [h1 Expression semantics] For any `c` boxed character the following are equivalent: lit<c> accept_when< one_char, boost::mpl::lambda<boost::mpl::equal_to<boost::mpl::_1, c>>::type, error::literal_expected<c::type::value> > [h1 Example] #include <boost/metaparse/lit.hpp> #include <boost/metaparse/start.hpp> #include <boost/metaparse/string.hpp> #include <boost/metaparse/is_error.hpp> #include <boost/metaparse/get_result.hpp> #include <type_traits> using namespace boost::metaparse; static_assert( is_error< lit<std::integral_constant<char, 'x'>> ::apply<BOOST_METAPARSE_STRING("a"), start> >::type::value, "a different character should be an error" ); static_assert( is_error< lit<std::integral_constant<char, 'x'>> ::apply<BOOST_METAPARSE_STRING(""), start> >::type::value, "empty input should be an error" ); static_assert( get_result< lit<std::integral_constant<char, 'x'>> ::apply<BOOST_METAPARSE_STRING("x"), start> >::type::value == 'x', "result of parsing should be the accepted character" ); [endsect]