]>
Commit | Line | Data |
---|---|---|
7c673cae FG |
1 | /*////////////////////////////////////////////////////////////////////////////// |
2 | Copyright (c) 2011 Jamboree | |
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 | #ifndef BOOST_SPIRIT_REPOSITORY_QI_SEEK | |
8 | #define BOOST_SPIRIT_REPOSITORY_QI_SEEK | |
9 | ||
10 | ||
11 | #if defined(_MSC_VER) | |
12 | #pragma once | |
13 | #endif | |
14 | ||
15 | ||
16 | #include <boost/spirit/home/qi/meta_compiler.hpp> | |
17 | #include <boost/spirit/home/qi/parser.hpp> | |
18 | #include <boost/spirit/home/qi/detail/attributes.hpp> | |
19 | #include <boost/spirit/home/support/info.hpp> | |
20 | #include <boost/spirit/home/support/unused.hpp> | |
21 | #include <boost/spirit/home/support/has_semantic_action.hpp> | |
22 | #include <boost/spirit/home/support/handles_container.hpp> | |
23 | #include <boost/spirit/repository/home/support/seek.hpp> | |
24 | ||
25 | ||
26 | namespace boost { namespace spirit | |
27 | { | |
28 | /////////////////////////////////////////////////////////////////////////// | |
29 | // Enablers | |
30 | /////////////////////////////////////////////////////////////////////////// | |
31 | ||
32 | // enables seek[...] | |
33 | template <> | |
34 | struct use_directive<qi::domain, repository::tag::seek> | |
35 | : mpl::true_ {}; | |
36 | }} // namespace boost::spirit | |
37 | ||
38 | ||
39 | namespace boost { namespace spirit { namespace repository {namespace qi | |
40 | { | |
41 | #ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS | |
42 | using repository::seek; | |
43 | #endif | |
44 | using repository::seek_type; | |
45 | ||
46 | template <typename Subject> | |
47 | struct seek_directive | |
48 | : spirit::qi::unary_parser<seek_directive<Subject> > | |
49 | { | |
50 | typedef Subject subject_type; | |
51 | ||
52 | template <typename Context, typename Iterator> | |
53 | struct attribute | |
54 | { | |
55 | typedef typename | |
56 | traits::attribute_of<subject_type, Context, Iterator>::type | |
57 | type; | |
58 | }; | |
59 | ||
60 | seek_directive(Subject const& subject) | |
61 | : subject(subject) | |
62 | {} | |
63 | ||
64 | template | |
65 | < | |
66 | typename Iterator, typename Context | |
67 | , typename Skipper, typename Attribute | |
68 | > | |
69 | bool parse | |
70 | ( | |
71 | Iterator& first, Iterator const& last | |
72 | , Context& context, Skipper const& skipper | |
73 | , Attribute& attr | |
74 | ) const | |
75 | { | |
76 | for (Iterator it(first); ; ++it) | |
77 | { | |
78 | if (subject.parse(it, last, context, skipper, attr)) | |
79 | { | |
80 | first = it; | |
81 | return true; | |
82 | } | |
83 | // fail only after subject fails & no input | |
84 | if (it == last) | |
85 | return false; | |
86 | } | |
87 | } | |
88 | ||
89 | template <typename Context> | |
90 | info what(Context& context) const | |
91 | { | |
92 | return info("seek", subject.what(context)); | |
93 | } | |
94 | ||
95 | Subject subject; | |
96 | }; | |
97 | }}}} // namespace boost::spirit::repository::qi | |
98 | ||
99 | ||
100 | namespace boost { namespace spirit { namespace qi | |
101 | { | |
102 | /////////////////////////////////////////////////////////////////////////// | |
103 | // Parser generators: make_xxx function (objects) | |
104 | /////////////////////////////////////////////////////////////////////////// | |
105 | template <typename Subject, typename Modifiers> | |
106 | struct make_directive<repository::tag::seek, Subject, Modifiers> | |
107 | { | |
108 | typedef repository::qi::seek_directive<Subject> result_type; | |
109 | ||
110 | result_type operator()(unused_type, Subject const& subject, unused_type) const | |
111 | { | |
112 | return result_type(subject); | |
113 | } | |
114 | }; | |
115 | }}} // namespace boost::spirit::qi | |
116 | ||
117 | ||
118 | namespace boost { namespace spirit { namespace traits | |
119 | { | |
120 | /////////////////////////////////////////////////////////////////////////// | |
121 | template <typename Subject> | |
122 | struct has_semantic_action<repository::qi::seek_directive<Subject> > | |
123 | : unary_has_semantic_action<Subject> {}; | |
124 | ||
125 | /////////////////////////////////////////////////////////////////////////// | |
126 | template <typename Subject, typename Attribute, typename Context | |
127 | , typename Iterator> | |
128 | struct handles_container<repository::qi::seek_directive<Subject>, Attribute | |
129 | , Context, Iterator> | |
130 | : unary_handles_container<Subject, Attribute, Context, Iterator> {}; | |
131 | }}} // namespace boost::spirit::traits | |
132 | ||
133 | ||
134 | #endif |