ceph/src/boost/boost/spirit/home/x3/operator/not_predicate.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(SPIRIT_NOT_PREDICATE_MARCH_23_2007_0618PM)
   8 #define SPIRIT_NOT_PREDICATE_MARCH_23_2007_0618PM
   9
  10 #include <boost/spirit/home/x3/core/parser.hpp>
  11
  12 namespace boost { namespace spirit { namespace x3
  13 {
  14     template <typename Subject>
  15     struct not_predicate : unary_parser<Subject, not_predicate<Subject>>
  16     {
  17         typedef unary_parser<Subject, not_predicate<Subject>> base_type;
  18
  19         typedef unused_type attribute_type;
  20         static bool const has_attribute = false;
  21
  22         not_predicate(Subject const& subject)
  23           : base_type(subject) {}
  24
  25         template <typename Iterator, typename Context
  26           , typename RContext, typename Attribute>
  27         bool parse(Iterator& first, Iterator const& last
  28           , Context const& context, RContext& rcontext, Attribute& /*attr*/) const
  29         {
  30             Iterator i = first;
  31             return !this->subject.parse(i, last, context, rcontext, unused);
  32         }
  33     };
  34
  35     template <typename Subject>
  36     inline not_predicate<typename extension::as_parser<Subject>::value_type>
  37     operator!(Subject const& subject)
  38     {
  39         return { as_parser(subject) };
  40     }
  41 }}}
  42
  43 #endif