Mercurial > hg > vamp-build-and-test
comparison DEPENDENCIES/generic/include/boost/proto/detail/basic_expr.hpp @ 16:2665513ce2d3
Add boost headers
author | Chris Cannam |
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date | Tue, 05 Aug 2014 11:11:38 +0100 |
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15:663ca0da4350 | 16:2665513ce2d3 |
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1 #if !defined(BOOST_PROTO_DONT_USE_PREPROCESSED_FILES) | |
2 | |
3 #include <boost/proto/detail/preprocessed/basic_expr.hpp> | |
4 | |
5 #elif !defined(BOOST_PP_IS_ITERATING) | |
6 | |
7 /// INTERNAL ONLY | |
8 /// | |
9 #define BOOST_PROTO_CHILD(Z, N, DATA) \ | |
10 typedef BOOST_PP_CAT(Arg, N) BOOST_PP_CAT(proto_child, N); \ | |
11 BOOST_PP_CAT(proto_child, N) BOOST_PP_CAT(child, N); \ | |
12 /**< INTERNAL ONLY */ | |
13 | |
14 /// INTERNAL ONLY | |
15 /// | |
16 #define BOOST_PROTO_VOID(Z, N, DATA) \ | |
17 typedef void BOOST_PP_CAT(proto_child, N); \ | |
18 /**< INTERNAL ONLY */ | |
19 | |
20 #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES) | |
21 #pragma wave option(preserve: 2, line: 0, output: "preprocessed/basic_expr.hpp") | |
22 #endif | |
23 | |
24 /////////////////////////////////////////////////////////////////////////////// | |
25 /// \file basic_expr.hpp | |
26 /// Contains definition of basic_expr\<\> class template. | |
27 // | |
28 // Copyright 2008 Eric Niebler. Distributed under the Boost | |
29 // Software License, Version 1.0. (See accompanying file | |
30 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
31 | |
32 #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES) | |
33 #pragma wave option(preserve: 1) | |
34 #endif | |
35 | |
36 // The expr<> specializations are actually defined here. | |
37 #define BOOST_PROTO_DEFINE_TERMINAL | |
38 #define BOOST_PP_ITERATION_PARAMS_1 (3, (0, 0, <boost/proto/detail/basic_expr.hpp>)) | |
39 #include BOOST_PP_ITERATE() | |
40 | |
41 #undef BOOST_PROTO_DEFINE_TERMINAL | |
42 #define BOOST_PP_ITERATION_PARAMS_1 (3, (1, BOOST_PROTO_MAX_ARITY, <boost/proto/detail/basic_expr.hpp>)) | |
43 #include BOOST_PP_ITERATE() | |
44 | |
45 #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES) | |
46 #pragma wave option(output: null) | |
47 #endif | |
48 | |
49 #undef BOOST_PROTO_CHILD | |
50 #undef BOOST_PROTO_VOID | |
51 | |
52 #else | |
53 | |
54 #define ARG_COUNT BOOST_PP_MAX(1, BOOST_PP_ITERATION()) | |
55 | |
56 /// \brief Simplified representation of a node in an expression tree. | |
57 /// | |
58 /// \c proto::basic_expr\<\> is a node in an expression template tree. It | |
59 /// is a container for its child sub-trees. It also serves as | |
60 /// the terminal nodes of the tree. | |
61 /// | |
62 /// \c Tag is type that represents the operation encoded by | |
63 /// this expression. It is typically one of the structs | |
64 /// in the \c boost::proto::tag namespace, but it doesn't | |
65 /// have to be. | |
66 /// | |
67 /// \c Args is a type list representing the type of the children | |
68 /// of this expression. It is an instantiation of one | |
69 /// of \c proto::list1\<\>, \c proto::list2\<\>, etc. The | |
70 /// child types must all themselves be either \c expr\<\> | |
71 /// or <tt>proto::expr\<\>&</tt>. If \c Args is an | |
72 /// instantiation of \c proto::term\<\> then this | |
73 /// \c expr\<\> type represents a terminal expression; | |
74 /// the parameter to the \c proto::term\<\> template | |
75 /// represents the terminal's value type. | |
76 /// | |
77 /// \c Arity is an integral constant representing the number of child | |
78 /// nodes this node contains. If \c Arity is 0, then this | |
79 /// node is a terminal. | |
80 /// | |
81 /// \c proto::basic_expr\<\> is a valid Fusion random-access sequence, where | |
82 /// the elements of the sequence are the child expressions. | |
83 #ifdef BOOST_PROTO_DEFINE_TERMINAL | |
84 template<typename Tag, typename Arg0> | |
85 struct basic_expr<Tag, term<Arg0>, 0> | |
86 #else | |
87 template<typename Tag BOOST_PP_ENUM_TRAILING_PARAMS(ARG_COUNT, typename Arg)> | |
88 struct basic_expr<Tag, BOOST_PP_CAT(list, BOOST_PP_ITERATION())<BOOST_PP_ENUM_PARAMS(ARG_COUNT, Arg)>, BOOST_PP_ITERATION() > | |
89 #endif | |
90 { | |
91 typedef Tag proto_tag; | |
92 static const long proto_arity_c = BOOST_PP_ITERATION(); | |
93 typedef mpl::long_<BOOST_PP_ITERATION() > proto_arity; | |
94 typedef basic_expr proto_base_expr; | |
95 #ifdef BOOST_PROTO_DEFINE_TERMINAL | |
96 typedef term<Arg0> proto_args; | |
97 #else | |
98 typedef BOOST_PP_CAT(list, BOOST_PP_ITERATION())<BOOST_PP_ENUM_PARAMS(ARG_COUNT, Arg)> proto_args; | |
99 #endif | |
100 typedef basic_expr proto_grammar; | |
101 typedef basic_default_domain proto_domain; | |
102 typedef default_generator proto_generator; | |
103 typedef proto::tag::proto_expr<Tag, proto_domain> fusion_tag; | |
104 typedef basic_expr proto_derived_expr; | |
105 typedef void proto_is_expr_; /**< INTERNAL ONLY */ | |
106 | |
107 BOOST_PP_REPEAT(ARG_COUNT, BOOST_PROTO_CHILD, ~) | |
108 BOOST_PP_REPEAT_FROM_TO(ARG_COUNT, BOOST_PROTO_MAX_ARITY, BOOST_PROTO_VOID, ~) | |
109 | |
110 /// \return *this | |
111 /// | |
112 BOOST_FORCEINLINE | |
113 basic_expr const &proto_base() const | |
114 { | |
115 return *this; | |
116 } | |
117 | |
118 /// \overload | |
119 /// | |
120 BOOST_FORCEINLINE | |
121 basic_expr &proto_base() | |
122 { | |
123 return *this; | |
124 } | |
125 | |
126 #ifdef BOOST_PROTO_DEFINE_TERMINAL | |
127 /// \return A new \c expr\<\> object initialized with the specified | |
128 /// arguments. | |
129 /// | |
130 template<typename A0> | |
131 BOOST_FORCEINLINE | |
132 static basic_expr const make(A0 &a0) | |
133 { | |
134 return detail::make_terminal(a0, static_cast<basic_expr *>(0), static_cast<proto_args *>(0)); | |
135 } | |
136 | |
137 /// \overload | |
138 /// | |
139 template<typename A0> | |
140 BOOST_FORCEINLINE | |
141 static basic_expr const make(A0 const &a0) | |
142 { | |
143 return detail::make_terminal(a0, static_cast<basic_expr *>(0), static_cast<proto_args *>(0)); | |
144 } | |
145 #else | |
146 /// \return A new \c expr\<\> object initialized with the specified | |
147 /// arguments. | |
148 /// | |
149 template<BOOST_PP_ENUM_PARAMS(ARG_COUNT, typename A)> | |
150 BOOST_FORCEINLINE | |
151 static basic_expr const make(BOOST_PP_ENUM_BINARY_PARAMS(ARG_COUNT, A, const &a)) | |
152 { | |
153 basic_expr that = {BOOST_PP_ENUM_PARAMS(ARG_COUNT, a)}; | |
154 return that; | |
155 } | |
156 #endif | |
157 | |
158 #if 1 == BOOST_PP_ITERATION() | |
159 /// If \c Tag is \c boost::proto::tag::address_of and \c proto_child0 is | |
160 /// <tt>T&</tt>, then \c address_of_hack_type_ is <tt>T*</tt>. | |
161 /// Otherwise, it is some undefined type. | |
162 typedef typename detail::address_of_hack<Tag, proto_child0>::type address_of_hack_type_; | |
163 | |
164 /// \return The address of <tt>this->child0</tt> if \c Tag is | |
165 /// \c boost::proto::tag::address_of. Otherwise, this function will | |
166 /// fail to compile. | |
167 /// | |
168 /// \attention Proto overloads <tt>operator&</tt>, which means that | |
169 /// proto-ified objects cannot have their addresses taken, unless we use | |
170 /// the following hack to make \c &x implicitly convertible to \c X*. | |
171 BOOST_FORCEINLINE | |
172 operator address_of_hack_type_() const | |
173 { | |
174 return boost::addressof(this->child0); | |
175 } | |
176 #else | |
177 /// INTERNAL ONLY | |
178 /// | |
179 typedef detail::not_a_valid_type address_of_hack_type_; | |
180 #endif | |
181 }; | |
182 | |
183 #undef ARG_COUNT | |
184 | |
185 #endif |