50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2014 Joel de Guzman
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#if !defined(BOOST_SPIRIT_X3_LITERAL_CHAR_APRIL_16_2006_1051AM)
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#define BOOST_SPIRIT_X3_LITERAL_CHAR_APRIL_16_2006_1051AM
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#include <boost/spirit/home/x3/char/char_parser.hpp>
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#include <boost/spirit/home/x3/support/utility/utf8.hpp>
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#include <boost/type_traits/is_same.hpp>
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namespace boost { namespace spirit { namespace x3
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{
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template <typename Encoding, typename Attribute = typename Encoding::char_type>
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struct literal_char : char_parser<literal_char<Encoding, Attribute>>
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{
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typedef typename Encoding::char_type char_type;
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typedef Encoding encoding;
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typedef Attribute attribute_type;
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static bool const has_attribute =
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!is_same<unused_type, attribute_type>::value;
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template <typename Char>
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constexpr literal_char(Char ch)
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: ch(static_cast<char_type>(ch)) {}
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template <typename Char, typename Context>
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bool test(Char ch_, Context const& context) const
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{
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return get_case_compare<encoding>(context)(ch, char_type(ch_)) == 0;
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}
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char_type ch;
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};
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template <typename Encoding, typename Attribute>
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struct get_info<literal_char<Encoding, Attribute>>
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{
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typedef std::string result_type;
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std::string operator()(literal_char<Encoding, Attribute> const& p) const
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{
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return '\'' + to_utf8(Encoding::toucs4(p.ch)) + '\'';
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}
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};
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}}}
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#endif
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