ceph/src/boost/boost/spirit/home/x3/char/negated_char_parser.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_NEGATED_CHAR_PARSER_APR_16_2006_0906AM)
   8 #define BOOST_SPIRIT_X3_NEGATED_CHAR_PARSER_APR_16_2006_0906AM
   9
  10 #include <boost/spirit/home/x3/support/traits/attribute_of.hpp>
  11 #include <boost/spirit/home/x3/support/traits/has_attribute.hpp>
  12 #include <boost/spirit/home/x3/char/char_parser.hpp>
  13
  14 namespace boost { namespace spirit { namespace x3
  15 {
  16     ///////////////////////////////////////////////////////////////////////////
  17     // negated_char_parser handles ~cp expressions (cp is a char_parser)
  18     ///////////////////////////////////////////////////////////////////////////
  19     template <typename Positive>
  20     struct negated_char_parser :
  21         char_parser<negated_char_parser<Positive>>
  22     {
  23         negated_char_parser(Positive const& positive)
  24           : positive(positive) {}
  25
  26         template <typename CharParam, typename Context>
  27         bool test(CharParam ch, Context const& context) const
  28         {
  29             return !positive.test(ch, context);
  30         }
  31
  32         Positive positive;
  33     };
  34
  35     template <typename Positive>
  36     inline negated_char_parser<Positive>
  37     operator~(char_parser<Positive> const& cp)
  38     {
  39         return { cp.derived() };
  40     }
  41
  42     template <typename Positive>
  43     inline Positive const&
  44     operator~(negated_char_parser<Positive> const& cp)
  45     {
  46         return cp.positive;
  47     }
  48 }}}
  49
  50 namespace boost { namespace spirit { namespace x3 { namespace traits
  51 {
  52     template <typename Positive, typename Context>
  53     struct attribute_of<x3::negated_char_parser<Positive>, Context>
  54         : attribute_of<Positive, Context> {};
  55
  56     template <typename Positive, typename Context>
  57     struct has_attribute<x3::negated_char_parser<Positive>, Context>
  58         : has_attribute<Positive, Context> {};
  59 }}}}
  60
  61 #endif