ceph/src/boost/boost/spirit/home/karma/operator/not_predicate.hpp

   1 //  Copyright (c) 2001-2011 Hartmut Kaiser
   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_KARMA_NOT_PREDICATE_MAR_21_2009_1132AM)
   8 #define SPIRIT_KARMA_NOT_PREDICATE_MAR_21_2009_1132AM
   9
  10 #if defined(_MSC_VER)
  11 #pragma once
  12 #endif
  13
  14 #include <boost/spirit/home/karma/domain.hpp>
  15 #include <boost/spirit/home/karma/meta_compiler.hpp>
  16 #include <boost/spirit/home/karma/generator.hpp>
  17 #include <boost/spirit/home/karma/detail/output_iterator.hpp>
  18 #include <boost/spirit/home/karma/detail/attributes.hpp>
  19 #include <boost/spirit/home/support/info.hpp>
  20 #include <boost/spirit/home/support/has_semantic_action.hpp>
  21 #include <boost/spirit/home/support/handles_container.hpp>
  22
  23 namespace boost { namespace spirit
  24 {
  25     ///////////////////////////////////////////////////////////////////////////
  26     // Enablers
  27     ///////////////////////////////////////////////////////////////////////////
  28     template <>
  29     struct use_operator<karma::domain, proto::tag::logical_not> // enables !g
  30       : mpl::true_ {};
  31 }}
  32
  33 namespace boost { namespace spirit { namespace karma
  34 {
  35     template <typename Subject>
  36     struct not_predicate : unary_generator<not_predicate<Subject> >
  37     {
  38         typedef Subject subject_type;
  39
  40         typedef mpl::int_<
  41             generator_properties::disabling | subject_type::properties::value
  42         > properties;
  43
  44         template <typename Context, typename Iterator>
  45         struct attribute
  46           : traits::attribute_of<subject_type, Context, Iterator>
  47         {};
  48
  49         not_predicate(Subject const& subject)
  50           : subject(subject) {}
  51
  52         template <
  53             typename OutputIterator, typename Context, typename Delimiter
  54           , typename Attribute>
  55         bool generate(OutputIterator& sink, Context& ctx, Delimiter const& d
  56           , Attribute const& attr) const
  57         {
  58             // inhibits output
  59             detail::disable_output<OutputIterator> disable(sink);
  60             return !subject.generate(sink, ctx, d, attr);
  61         }
  62
  63         template <typename Context>
  64         info what(Context& context) const
  65         {
  66             return info("not-predicate", subject.what(context));
  67         }
  68
  69         Subject subject;
  70     };
  71
  72     ///////////////////////////////////////////////////////////////////////////
  73     // Generator generators: make_xxx function (objects)
  74     ///////////////////////////////////////////////////////////////////////////
  75     template <typename Elements, typename Modifiers>
  76     struct make_composite<proto::tag::logical_not, Elements, Modifiers>
  77       : make_unary_composite<Elements, not_predicate> {};
  78
  79 }}}
  80
  81 namespace boost { namespace spirit { namespace traits
  82 {
  83     ///////////////////////////////////////////////////////////////////////////
  84     template <typename Subject>
  85     struct has_semantic_action<karma::not_predicate<Subject> >
  86       : unary_has_semantic_action<Subject> {};
  87
  88     ///////////////////////////////////////////////////////////////////////////
  89     template <typename Subject, typename Attribute, typename Context
  90         , typename Iterator>
  91     struct handles_container<karma::not_predicate<Subject>, Attribute
  92         , Context, Iterator>
  93       : unary_handles_container<Subject, Attribute, Context, Iterator> {};
  94 }}}
  95
  96 #endif