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1 | /*============================================================================= |
2 | Copyright (c) 2001-2011 Joel de Guzman | |
3 | Copyright (c) 2001-2011 Hartmut Kaiser | |
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(SPIRIT_EXPECT_APRIL_29_2007_0445PM) | |
9 | #define SPIRIT_EXPECT_APRIL_29_2007_0445PM | |
10 | ||
11 | #if defined(_MSC_VER) | |
12 | #pragma once | |
13 | #endif | |
14 | ||
15 | #include <boost/spirit/home/qi/operator/sequence_base.hpp> | |
16 | #include <boost/spirit/home/qi/detail/expect_function.hpp> | |
17 | #include <boost/spirit/home/qi/meta_compiler.hpp> | |
18 | #include <boost/spirit/home/support/has_semantic_action.hpp> | |
19 | #include <boost/spirit/home/support/handles_container.hpp> | |
20 | #include <boost/spirit/home/support/info.hpp> | |
21 | #include <stdexcept> | |
22 | ||
23 | namespace boost { namespace spirit | |
24 | { | |
25 | /////////////////////////////////////////////////////////////////////////// | |
26 | // Enablers | |
27 | /////////////////////////////////////////////////////////////////////////// | |
28 | template <> | |
29 | struct use_operator<qi::domain, proto::tag::greater> // enables > | |
30 | : mpl::true_ {}; | |
31 | ||
32 | template <> | |
33 | struct flatten_tree<qi::domain, proto::tag::greater> // flattens > | |
34 | : mpl::true_ {}; | |
35 | }} | |
36 | ||
37 | namespace boost { namespace spirit { namespace qi | |
38 | { | |
39 | template <typename Iterator> | |
40 | struct expectation_failure : std::runtime_error | |
41 | { | |
42 | expectation_failure(Iterator first_, Iterator last_, info const& what) | |
43 | : std::runtime_error("boost::spirit::qi::expectation_failure") | |
44 | , first(first_), last(last_), what_(what) | |
45 | {} | |
46 | ~expectation_failure() throw() {} | |
47 | ||
48 | Iterator first; | |
49 | Iterator last; | |
50 | info what_; | |
51 | }; | |
52 | ||
53 | template <typename Elements> | |
54 | struct expect : sequence_base<expect<Elements>, Elements> | |
55 | { | |
56 | friend struct sequence_base<expect<Elements>, Elements>; | |
57 | ||
58 | expect(Elements const& elements) | |
59 | : sequence_base<expect<Elements>, Elements>(elements) {} | |
60 | ||
61 | private: | |
62 | ||
63 | template <typename Iterator, typename Context, typename Skipper> | |
64 | static detail::expect_function< | |
65 | Iterator, Context, Skipper | |
66 | , expectation_failure<Iterator> > | |
67 | fail_function( | |
68 | Iterator& first, Iterator const& last | |
69 | , Context& context, Skipper const& skipper) | |
70 | { | |
71 | return detail::expect_function< | |
72 | Iterator, Context, Skipper, expectation_failure<Iterator> > | |
73 | (first, last, context, skipper); | |
74 | } | |
75 | ||
76 | std::string id() const { return "expect"; } | |
77 | }; | |
78 | ||
79 | /////////////////////////////////////////////////////////////////////////// | |
80 | // Parser generators: make_xxx function (objects) | |
81 | /////////////////////////////////////////////////////////////////////////// | |
82 | template <typename Elements, typename Modifiers> | |
83 | struct make_composite<proto::tag::greater, Elements, Modifiers> | |
84 | : make_nary_composite<Elements, expect> | |
85 | {}; | |
86 | }}} | |
87 | ||
88 | namespace boost { namespace spirit { namespace traits | |
89 | { | |
90 | /////////////////////////////////////////////////////////////////////////// | |
91 | template <typename Elements> | |
92 | struct has_semantic_action<qi::expect<Elements> > | |
93 | : nary_has_semantic_action<Elements> {}; | |
94 | ||
95 | /////////////////////////////////////////////////////////////////////////// | |
96 | template <typename Elements, typename Attribute, typename Context | |
97 | , typename Iterator> | |
98 | struct handles_container<qi::expect<Elements>, Attribute, Context | |
99 | , Iterator> | |
100 | : mpl::true_ {}; | |
101 | }}} | |
102 | ||
103 | #endif |