Chris@16: /*=============================================================================
Chris@16:     Copyright (c) 2001-2011 Joel de Guzman
Chris@16: 
Chris@16:     Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16:     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: ==============================================================================*/
Chris@16: #if !defined(BOOST_SPIRIT_GRAMMAR_FEBRUARY_19_2007_0236PM)
Chris@16: #define BOOST_SPIRIT_GRAMMAR_FEBRUARY_19_2007_0236PM
Chris@16: 
Chris@16: #if defined(_MSC_VER)
Chris@16: #pragma once
Chris@16: #endif
Chris@16: 
Chris@16: #include <boost/spirit/home/support/unused.hpp>
Chris@16: #include <boost/spirit/home/support/info.hpp>
Chris@16: #include <boost/spirit/home/support/assert_msg.hpp>
Chris@16: #include <boost/spirit/home/qi/domain.hpp>
Chris@16: #include <boost/spirit/home/qi/nonterminal/rule.hpp>
Chris@16: #include <boost/spirit/home/qi/nonterminal/nonterminal_fwd.hpp>
Chris@16: #include <boost/spirit/home/qi/reference.hpp>
Chris@16: #include <boost/noncopyable.hpp>
Chris@16: #include <boost/type_traits/is_same.hpp>
Chris@16: 
Chris@16: namespace boost { namespace spirit { namespace qi
Chris@16: {
Chris@16:     template <
Chris@16:         typename Iterator, typename T1, typename T2, typename T3
Chris@16:       , typename T4>
Chris@16:     struct grammar
Chris@16:       : proto::extends<
Chris@16:             typename proto::terminal<
Chris@16:                 reference<rule<Iterator, T1, T2, T3, T4> const>
Chris@16:             >::type
Chris@16:           , grammar<Iterator, T1, T2, T3, T4>
Chris@16:         >
Chris@16:       , parser<grammar<Iterator, T1, T2, T3, T4> >
Chris@16:       , noncopyable
Chris@16:     {
Chris@16:         typedef Iterator iterator_type;
Chris@16:         typedef rule<Iterator, T1, T2, T3, T4> start_type;
Chris@16:         typedef typename start_type::sig_type sig_type;
Chris@16:         typedef typename start_type::locals_type locals_type;
Chris@16:         typedef typename start_type::skipper_type skipper_type;
Chris@16:         typedef typename start_type::encoding_type encoding_type;
Chris@16:         typedef grammar<Iterator, T1, T2, T3, T4> base_type;
Chris@16:         typedef reference<start_type const> reference_;
Chris@16:         typedef typename proto::terminal<reference_>::type terminal;
Chris@16: 
Chris@16:         static size_t const params_size = start_type::params_size;
Chris@16: 
Chris@16:         template <typename Context, typename Iterator_>
Chris@16:         struct attribute
Chris@16:         {
Chris@16:             typedef typename start_type::attr_type type;
Chris@16:         };
Chris@16: 
Chris@16:         grammar(
Chris@16:             start_type const& start
Chris@16:           , std::string const& name = "unnamed-grammar")
Chris@16:         : proto::extends<terminal, base_type>(terminal::make(reference_(start)))
Chris@16:         , name_(name)
Chris@16:         {}
Chris@16: 
Chris@16:         // This constructor is used to catch if the start rule is not
Chris@16:         // compatible with the grammar.
Chris@16:         template <typename Iterator_,
Chris@16:             typename T1_, typename T2_, typename T3_, typename T4_>
Chris@16:         grammar(
Chris@16:             rule<Iterator_, T1_, T2_, T3_, T4_> const&
Chris@16:           , std::string const& = "unnamed-grammar")
Chris@16:         {
Chris@16:             // If you see the assertion below failing then the start rule
Chris@16:             // passed to the constructor of the grammar is not compatible with
Chris@16:             // the grammar (i.e. it uses different template parameters).
Chris@16:             BOOST_SPIRIT_ASSERT_MSG(
Chris@16:                 (is_same<start_type, rule<Iterator_, T1_, T2_, T3_, T4_> >::value)
Chris@16:               , incompatible_start_rule, (rule<Iterator_, T1_, T2_, T3_, T4_>));
Chris@16:         }
Chris@16: 
Chris@16:         std::string name() const
Chris@16:         {
Chris@16:             return name_;
Chris@16:         }
Chris@16: 
Chris@16:         void name(std::string const& str)
Chris@16:         {
Chris@16:             name_ = str;
Chris@16:         }
Chris@16: 
Chris@16:         template <typename Context, typename Skipper, typename Attribute>
Chris@16:         bool parse(Iterator& first, Iterator const& last
Chris@16:           , Context& context, Skipper const& skipper
Chris@16:           , Attribute& attr_) const
Chris@16:         {
Chris@16:             return this->proto_base().child0.parse(
Chris@16:                 first, last, context, skipper, attr_);
Chris@16:         }
Chris@16: 
Chris@16:         template <typename Context>
Chris@16:         info what(Context&) const
Chris@16:         {
Chris@16:             return info(name_);
Chris@16:         }
Chris@16: 
Chris@16:         // bring in the operator() overloads
Chris@16:         start_type const& get_parameterized_subject() const
Chris@16:         { return this->proto_base().child0.ref.get(); }
Chris@16:         typedef start_type parameterized_subject_type;
Chris@16:         #include <boost/spirit/home/qi/nonterminal/detail/fcall.hpp>
Chris@16: 
Chris@16:         std::string name_;
Chris@16: 
Chris@16:     };
Chris@16: }}}
Chris@16: 
Chris@16: namespace boost { namespace spirit { namespace traits
Chris@16: {
Chris@16:     ///////////////////////////////////////////////////////////////////////////
Chris@16:     template <
Chris@16:         typename IteratorA, typename IteratorB, typename Attribute
Chris@16:       , typename Context, typename T1, typename T2, typename T3, typename T4>
Chris@16:     struct handles_container<
Chris@16:         qi::grammar<IteratorA, T1, T2, T3, T4>, Attribute, Context, IteratorB>
Chris@16:       : traits::is_container<
Chris@16:           typename attribute_of<
Chris@16:               qi::grammar<IteratorA, T1, T2, T3, T4>, Context, IteratorB
Chris@16:           >::type
Chris@16:         >
Chris@16:     {};
Chris@16: }}}
Chris@16: 
Chris@16: #endif