ceph/src/boost/libs/spirit/include/boost/spirit/home/qi/operator/not_predicate.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2011 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 #if defined(_MSC_VER)
  11 #pragma once
  12 #endif
  13
  14 #include <boost/spirit/home/qi/domain.hpp>
  15 #include <boost/spirit/home/qi/meta_compiler.hpp>
  16 #include <boost/spirit/home/qi/parser.hpp>
  17 #include <boost/spirit/home/qi/detail/attributes.hpp>
  18 #include <boost/spirit/home/support/has_semantic_action.hpp>
  19 #include <boost/spirit/home/support/handles_container.hpp>
  20 #include <boost/spirit/home/support/info.hpp>
  21
  22 namespace boost { namespace spirit
  23 {
  24     ///////////////////////////////////////////////////////////////////////////
  25     // Enablers
  26     ///////////////////////////////////////////////////////////////////////////
  27     template <>
  28     struct use_operator<qi::domain, proto::tag::logical_not> // enables !p
  29       : mpl::true_ {};
  30 }}
  31
  32 namespace boost { namespace spirit { namespace qi
  33 {
  34     template <typename Subject>
  35     struct not_predicate : unary_parser<not_predicate<Subject> >
  36     {
  37         typedef Subject subject_type;
  38
  39         template <typename Context, typename Iterator>
  40         struct attribute
  41         {
  42             typedef unused_type type;
  43         };
  44
  45         not_predicate(Subject const& subject_)
  46           : subject(subject_) {}
  47
  48         template <typename Iterator, typename Context
  49           , typename Skipper, typename Attribute>
  50         bool parse(Iterator& first, Iterator const& last
  51           , Context& context, Skipper const& skipper
  52           , Attribute& /*attr*/) const
  53         {
  54             Iterator i = first;
  55             return !subject.parse(i, last, context, skipper, unused);
  56         }
  57
  58         template <typename Context>
  59         info what(Context& context) const
  60         {
  61             return info("not-predicate", subject.what(context));
  62         }
  63
  64         Subject subject;
  65     };
  66
  67     ///////////////////////////////////////////////////////////////////////////
  68     // Parser generators: make_xxx function (objects)
  69     ///////////////////////////////////////////////////////////////////////////
  70     template <typename Elements, typename Modifiers>
  71     struct make_composite<proto::tag::logical_not, Elements, Modifiers>
  72       : make_unary_composite<Elements, not_predicate>
  73     {};
  74 }}}
  75
  76 namespace boost { namespace spirit { namespace traits
  77 {
  78     ///////////////////////////////////////////////////////////////////////////
  79     template <typename Subject>
  80     struct has_semantic_action<qi::not_predicate<Subject> >
  81       : unary_has_semantic_action<Subject> {};
  82
  83     ///////////////////////////////////////////////////////////////////////////
  84     template <typename Subject, typename Attribute, typename Context
  85         , typename Iterator>
  86     struct handles_container<qi::not_predicate<Subject>, Attribute
  87         , Context, Iterator>
  88       : unary_handles_container<Subject, Attribute, Context, Iterator> {};
  89 }}}
  90
  91 #endif