ceph/src/boost/boost/spirit/home/x3/char/literal_char.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2014 Joel de Guzman
   3
   4     Distributed under the Boost Software License, Version 1.0. (See accompanying
   5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 ==============================================================================*/
   7 #if !defined(BOOST_SPIRIT_X3_LITERAL_CHAR_APRIL_16_2006_1051AM)
   8 #define BOOST_SPIRIT_X3_LITERAL_CHAR_APRIL_16_2006_1051AM
   9
  10 #include <boost/spirit/home/x3/char/char_parser.hpp>
  11 #include <boost/spirit/home/x3/support/utility/utf8.hpp>
  12 #include <boost/type_traits/is_same.hpp>
  13
  14 namespace boost { namespace spirit { namespace x3
  15 {
  16     template <typename Encoding, typename Attribute = typename Encoding::char_type>
  17     struct literal_char : char_parser<literal_char<Encoding, Attribute>>
  18     {
  19         typedef typename Encoding::char_type char_type;
  20         typedef Encoding encoding;
  21         typedef Attribute attribute_type;
  22         static bool const has_attribute =
  23             !is_same<unused_type, attribute_type>::value;
  24
  25         template <typename Char>
  26         literal_char(Char ch)
  27           : ch(static_cast<char_type>(ch)) {}
  28
  29         template <typename Char, typename Context>
  30         bool test(Char ch_, Context const& context) const
  31         {
  32             return ((sizeof(Char) <= sizeof(char_type)) || encoding::ischar(ch_))
  33                 && (get_case_compare<encoding>(context)(ch, char_type(ch_)) == 0);
  34         }
  35
  36         char_type ch;
  37     };
  38
  39     template <typename Encoding, typename Attribute>
  40     struct get_info<literal_char<Encoding, Attribute>>
  41     {
  42         typedef std::string result_type;
  43         std::string operator()(literal_char<Encoding, Attribute> const& p) const
  44         {
  45             return '\'' + to_utf8(Encoding::toucs4(p.ch)) + '\'';
  46         }
  47     };
  48 }}}
  49
  50 #endif