ceph/src/boost/boost/spirit/home/qi/directive/matches.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2011 Hartmut Kaiser
   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_MATCHES_JAN_07_2010_0745PM)
   8 #define SPIRIT_MATCHES_JAN_07_2010_0745PM
   9
  10 #if defined(_MSC_VER)
  11 #pragma once
  12 #endif
  13
  14 #include <boost/spirit/home/qi/meta_compiler.hpp>
  15 #include <boost/spirit/home/qi/parser.hpp>
  16 #include <boost/spirit/home/qi/detail/assign_to.hpp>
  17 #include <boost/spirit/home/support/unused.hpp>
  18 #include <boost/spirit/home/support/info.hpp>
  19 #include <boost/spirit/home/support/common_terminals.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_directive<qi::domain, tag::matches> // enables matches
  30       : mpl::true_ {};
  31 }}
  32
  33 namespace boost { namespace spirit { namespace qi
  34 {
  35 #ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
  36     using spirit::matches;
  37 #endif
  38     using spirit::matches_type;
  39
  40     ///////////////////////////////////////////////////////////////////////////
  41     // matches_directive returns whether the embedded parser matched
  42     ///////////////////////////////////////////////////////////////////////////
  43     template <typename Subject>
  44     struct matches_directive : unary_parser<matches_directive<Subject> >
  45     {
  46         typedef Subject subject_type;
  47         matches_directive(Subject const& subject_)
  48           : subject(subject_) {}
  49
  50         template <typename Context, typename Iterator>
  51         struct attribute
  52         {
  53             typedef bool type;
  54         };
  55
  56         template <typename Iterator, typename Context
  57           , typename Skipper, typename Attribute>
  58         bool parse(Iterator& first, Iterator const& last
  59           , Context& context, Skipper const& skipper, Attribute& attr_) const
  60         {
  61             bool result = subject.parse(first, last, context, skipper, unused);
  62             spirit::traits::assign_to(result, attr_);
  63             return true;
  64         }
  65
  66         template <typename Context>
  67         info what(Context& context) const
  68         {
  69             return info("matches", subject.what(context));
  70         }
  71
  72         Subject subject;
  73
  74     private:
  75         // silence MSVC warning C4512: assignment operator could not be generated
  76         matches_directive& operator= (matches_directive const&);
  77     };
  78
  79     ///////////////////////////////////////////////////////////////////////////
  80     // Parser generators: make_xxx function (objects)
  81     ///////////////////////////////////////////////////////////////////////////
  82     template <typename Subject, typename Modifiers>
  83     struct make_directive<tag::matches, Subject, Modifiers>
  84     {
  85         typedef matches_directive<Subject> result_type;
  86         result_type operator()(unused_type, Subject const& subject, unused_type) const
  87         {
  88             return result_type(subject);
  89         }
  90     };
  91 }}}
  92
  93 namespace boost { namespace spirit { namespace traits
  94 {
  95     ///////////////////////////////////////////////////////////////////////////
  96     template <typename Subject>
  97     struct has_semantic_action<qi::matches_directive<Subject> >
  98       : unary_has_semantic_action<Subject> {};
  99
 100     ///////////////////////////////////////////////////////////////////////////
 101     template <typename Subject, typename Attribute, typename Context
 102         , typename Iterator>
 103     struct handles_container<qi::matches_directive<Subject>, Attribute
 104         , Context, Iterator>
 105       : unary_handles_container<Subject, Attribute, Context, Iterator> {};
 106 }}}
 107
 108 #endif