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     {
parameterized_nonterminalboost::spirit::qi::parameterized_nonterminal30         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>
parseboost::spirit::qi::parameterized_nonterminal42         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>
whatboost::spirit::qi::parameterized_nonterminal52         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
76