ceph/src/boost/libs/spirit/include/boost/spirit/home/qi/nonterminal/grammar.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(BOOST_SPIRIT_GRAMMAR_FEBRUARY_19_2007_0236PM)
   8 #define BOOST_SPIRIT_GRAMMAR_FEBRUARY_19_2007_0236PM
   9
  10 #if defined(_MSC_VER)
  11 #pragma once
  12 #endif
  13
  14 #include <boost/spirit/home/support/unused.hpp>
  15 #include <boost/spirit/home/support/info.hpp>
  16 #include <boost/spirit/home/support/assert_msg.hpp>
  17 #include <boost/spirit/home/qi/domain.hpp>
  18 #include <boost/spirit/home/qi/nonterminal/rule.hpp>
  19 #include <boost/spirit/home/qi/nonterminal/nonterminal_fwd.hpp>
  20 #include <boost/spirit/home/qi/reference.hpp>
  21 #include <boost/noncopyable.hpp>
  22 #include <boost/type_traits/is_same.hpp>
  23
  24 namespace boost { namespace spirit { namespace qi
  25 {
  26     template <
  27         typename Iterator, typename T1, typename T2, typename T3
  28       , typename T4>
  29     struct grammar
  30       : proto::extends<
  31             typename proto::terminal<
  32                 reference<rule<Iterator, T1, T2, T3, T4> const>
  33             >::type
  34           , grammar<Iterator, T1, T2, T3, T4>
  35         >
  36       , parser<grammar<Iterator, T1, T2, T3, T4> >
  37       , noncopyable
  38     {
  39         typedef Iterator iterator_type;
  40         typedef rule<Iterator, T1, T2, T3, T4> start_type;
  41         typedef typename start_type::sig_type sig_type;
  42         typedef typename start_type::locals_type locals_type;
  43         typedef typename start_type::skipper_type skipper_type;
  44         typedef typename start_type::encoding_type encoding_type;
  45         typedef grammar<Iterator, T1, T2, T3, T4> base_type;
  46         typedef reference<start_type const> reference_;
  47         typedef typename proto::terminal<reference_>::type terminal;
  48
  49         static size_t const params_size = start_type::params_size;
  50
  51         template <typename Context, typename Iterator_>
  52         struct attribute
  53         {
  54             typedef typename start_type::attr_type type;
  55         };
  56
  57         grammar(
  58             start_type const& start
  59           , std::string const& name = "unnamed-grammar")
  60         : proto::extends<terminal, base_type>(terminal::make(reference_(start)))
  61         , name_(name)
  62         {}
  63
  64         // This constructor is used to catch if the start rule is not
  65         // compatible with the grammar.
  66         template <typename Iterator_,
  67             typename T1_, typename T2_, typename T3_, typename T4_>
  68         grammar(
  69             rule<Iterator_, T1_, T2_, T3_, T4_> const&
  70           , std::string const& = "unnamed-grammar")
  71         {
  72             // If you see the assertion below failing then the start rule
  73             // passed to the constructor of the grammar is not compatible with
  74             // the grammar (i.e. it uses different template parameters).
  75             BOOST_SPIRIT_ASSERT_MSG(
  76                 (is_same<start_type, rule<Iterator_, T1_, T2_, T3_, T4_> >::value)
  77               , incompatible_start_rule, (rule<Iterator_, T1_, T2_, T3_, T4_>));
  78         }
  79
  80         std::string name() const
  81         {
  82             return name_;
  83         }
  84
  85         void name(std::string const& str)
  86         {
  87             name_ = str;
  88         }
  89
  90         template <typename Context, typename Skipper, typename Attribute>
  91         bool parse(Iterator& first, Iterator const& last
  92           , Context& context, Skipper const& skipper
  93           , Attribute& attr_) const
  94         {
  95             return this->proto_base().child0.parse(
  96                 first, last, context, skipper, attr_);
  97         }
  98
  99         template <typename Context>
 100         info what(Context&) const
 101         {
 102             return info(name_);
 103         }
 104
 105         // bring in the operator() overloads
 106         start_type const& get_parameterized_subject() const
 107         { return this->proto_base().child0.ref.get(); }
 108         typedef start_type parameterized_subject_type;
 109         #include <boost/spirit/home/qi/nonterminal/detail/fcall.hpp>
 110
 111         std::string name_;
 112
 113     };
 114 }}}
 115
 116 namespace boost { namespace spirit { namespace traits
 117 {
 118     ///////////////////////////////////////////////////////////////////////////
 119     template <
 120         typename IteratorA, typename IteratorB, typename Attribute
 121       , typename Context, typename T1, typename T2, typename T3, typename T4>
 122     struct handles_container<
 123         qi::grammar<IteratorA, T1, T2, T3, T4>, Attribute, Context, IteratorB>
 124       : traits::is_container<
 125           typename attribute_of<
 126               qi::grammar<IteratorA, T1, T2, T3, T4>, Context, IteratorB
 127           >::type
 128         >
 129     {};
 130 }}}
 131
 132 #endif