ceph/src/boost/boost/spirit/home/qi/nonterminal/detail/parameterized.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2011 Joel de Guzman
   3     Copyright (c) 2009 Francois Barel
   4
   5     Distributed under the Boost Software License, Version 1.0. (See accompanying
   6     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   7 ==============================================================================*/
   8 #if !defined(BOOST_SPIRIT_PARAMETERIZED_AUGUST_09_2009_0539AM)
   9 #define BOOST_SPIRIT_PARAMETERIZED_AUGUST_09_2009_0539AM
  10
  11 #if defined(_MSC_VER)
  12 #pragma once
  13 #endif
  14
  15 #include <boost/ref.hpp>
  16
  17 #include <boost/spirit/home/support/handles_container.hpp>
  18 #include <boost/spirit/home/qi/parser.hpp>
  19
  20 namespace boost { namespace spirit { namespace qi
  21 {
  22     ///////////////////////////////////////////////////////////////////////////
  23     // parameterized_nonterminal: parser representing the invocation of a
  24     // nonterminal, passing inherited attributes
  25     ///////////////////////////////////////////////////////////////////////////
  26     template <typename Subject, typename Params>
  27     struct parameterized_nonterminal
  28       : parser<parameterized_nonterminal<Subject, Params> >
  29     {
  30         parameterized_nonterminal(Subject const& subject, Params const& params_)
  31           : ref(subject), params(params_)
  32         {
  33         }
  34
  35         template <typename Context, typename Iterator>
  36         struct attribute
  37             // Forward to subject.
  38           : Subject::template attribute<Context, Iterator> {};
  39
  40         template <typename Iterator, typename Context
  41           , typename Skipper, typename Attribute>
  42         bool parse(Iterator& first, Iterator const& last
  43           , Context& context, Skipper const& skipper
  44           , Attribute& attr_) const
  45         {
  46             // Forward to subject, passing the additional
  47             // params argument to parse.
  48             return ref.get().parse(first, last, context, skipper, attr_, params);
  49         }
  50
  51         template <typename Context>
  52         info what(Context& context) const
  53         {
  54             // Forward to subject.
  55             return ref.get().what(context);
  56         }
  57
  58         boost::reference_wrapper<Subject const> ref;
  59         Params params;
  60     };
  61 }}}
  62
  63 namespace boost { namespace spirit { namespace traits
  64 {
  65     ///////////////////////////////////////////////////////////////////////////
  66     template <typename Subject, typename Params, typename Attribute
  67       , typename Context, typename Iterator>
  68     struct handles_container<qi::parameterized_nonterminal<Subject, Params>
  69           , Attribute, Context, Iterator>
  70       : handles_container<typename remove_const<Subject>::type
  71         , Attribute, Context, Iterator>
  72     {};
  73 }}}
  74
  75 #endif