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1 | /*============================================================================== |
2 | Copyright (c) 2005-2007 Dan Marsden | |
3 | Copyright (c) 2005-2010 Joel de Guzman | |
4 | Copyright (c) 2010 Thomas Heller | |
5 | ||
6 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
7 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
8 | ==============================================================================*/ | |
9 | #ifndef BOOST_PHOENIX_STATEMENT_THROW_HPP | |
10 | #define BOOST_PHOENIX_STATEMENT_THROW_HPP | |
11 | ||
12 | #include <boost/phoenix/core/limits.hpp> | |
13 | #include <boost/phoenix/core/actor.hpp> | |
14 | #include <boost/phoenix/core/call.hpp> | |
15 | #include <boost/phoenix/core/meta_grammar.hpp> | |
16 | #include <boost/phoenix/core/expression.hpp> | |
17 | #include <boost/phoenix/core/terminal.hpp> | |
18 | #include <boost/phoenix/core/value.hpp> | |
19 | ||
20 | namespace boost { namespace phoenix | |
21 | { | |
22 | namespace tag | |
23 | { | |
24 | struct throw_ {}; | |
25 | } | |
26 | ||
27 | namespace expression | |
28 | { | |
29 | template <typename A> | |
30 | struct throw_ | |
31 | : expr<tag::throw_, A> | |
32 | {}; | |
33 | } | |
34 | ||
35 | namespace rule | |
36 | { | |
37 | struct throw_ | |
38 | : expression::throw_<meta_grammar> | |
39 | {}; | |
40 | } | |
41 | ||
42 | template <typename Dummy> | |
43 | struct meta_grammar::case_<tag::throw_, Dummy> | |
44 | : enable_rule<rule::throw_, Dummy> | |
45 | {}; | |
46 | ||
47 | struct throw_eval | |
48 | { | |
49 | typedef void result_type; | |
50 | ||
51 | template <typename ThrowExpr, typename Context> | |
52 | result_type | |
53 | operator()(ThrowExpr const& throw_expr, Context const & ctx) const | |
54 | { | |
55 | throw boost::phoenix::eval(throw_expr, ctx); | |
56 | } | |
57 | }; | |
58 | ||
59 | template <typename Dummy> | |
60 | struct default_actions::when<rule::throw_, Dummy> | |
61 | : call<throw_eval> | |
62 | {}; | |
63 | ||
64 | template <typename ThrowExpr> | |
65 | inline | |
66 | typename expression::throw_<ThrowExpr>::type const | |
67 | throw_(ThrowExpr const& throw_expr) | |
68 | { | |
69 | return expression::throw_<ThrowExpr>::make(throw_expr); | |
70 | } | |
71 | ||
72 | namespace detail | |
73 | { | |
74 | struct rethrow {}; | |
75 | } | |
76 | ||
77 | namespace expression | |
78 | { | |
79 | struct rethrow | |
80 | : expression::value<detail::rethrow> | |
81 | {}; | |
82 | } | |
83 | ||
84 | template<typename Dummy> | |
85 | struct is_custom_terminal<detail::rethrow, Dummy> | |
86 | : mpl::true_ | |
87 | {}; | |
88 | ||
89 | template<typename Dummy> | |
90 | struct custom_terminal<detail::rethrow, Dummy> | |
91 | { | |
92 | typedef void result_type; | |
93 | //#ifndef BOOST_PHOENIX_NO_SPECIALIZE_CUSTOM_TERMINAL | |
94 | typedef void _is_throw_custom_terminal; // fix for #7730 | |
95 | //#endif | |
96 | ||
97 | template <typename Context> | |
98 | void operator()(detail::rethrow, Context &) const | |
99 | { | |
100 | throw; | |
101 | } | |
102 | }; | |
103 | ||
104 | inline | |
105 | expression::rethrow::type const | |
106 | throw_() | |
107 | { | |
108 | return expression::rethrow::make(detail::rethrow()); | |
109 | } | |
110 | ||
111 | }} | |
112 | ||
113 | #endif |