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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 |