[857] | 1 | // Boost.Function library
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| 2 |
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| 3 | // Copyright Douglas Gregor 2001-2003. Use, modification and
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| 4 | // distribution is subject to the Boost Software License, Version
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| 5 | // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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| 6 | // http://www.boost.org/LICENSE_1_0.txt)
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| 7 |
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| 8 | // For more information, see http://www.boost.org
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| 9 |
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| 10 | // Note: this header is a header template and must NOT have multiple-inclusion
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| 11 | // protection.
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| 12 | #include <boost/function/detail/prologue.hpp>
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| 13 |
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| 14 | #define BOOST_FUNCTION_TEMPLATE_PARMS BOOST_PP_ENUM_PARAMS(BOOST_FUNCTION_NUM_ARGS, typename T)
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| 15 |
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| 16 | #define BOOST_FUNCTION_TEMPLATE_ARGS BOOST_PP_ENUM_PARAMS(BOOST_FUNCTION_NUM_ARGS, T)
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| 17 |
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| 18 | #define BOOST_FUNCTION_PARM(J,I,D) BOOST_PP_CAT(T,I) BOOST_PP_CAT(a,I)
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| 19 |
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| 20 | #define BOOST_FUNCTION_PARMS BOOST_PP_ENUM(BOOST_FUNCTION_NUM_ARGS,BOOST_FUNCTION_PARM,BOOST_PP_EMPTY)
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| 21 |
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| 22 | #define BOOST_FUNCTION_ARGS BOOST_PP_ENUM_PARAMS(BOOST_FUNCTION_NUM_ARGS, a)
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| 23 |
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| 24 | #define BOOST_FUNCTION_ARG_TYPE(J,I,D) \
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| 25 | typedef BOOST_PP_CAT(T,I) BOOST_PP_CAT(arg, BOOST_PP_CAT(BOOST_PP_INC(I),_type));
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| 26 |
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| 27 | #define BOOST_FUNCTION_ARG_TYPES BOOST_PP_REPEAT(BOOST_FUNCTION_NUM_ARGS,BOOST_FUNCTION_ARG_TYPE,BOOST_PP_EMPTY)
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| 28 |
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| 29 | // Type of the default allocator
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| 30 | #ifndef BOOST_NO_STD_ALLOCATOR
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| 31 | # define BOOST_FUNCTION_DEFAULT_ALLOCATOR std::allocator<function_base>
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| 32 | #else
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| 33 | # define BOOST_FUNCTION_DEFAULT_ALLOCATOR int
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| 34 | #endif // BOOST_NO_STD_ALLOCATOR
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| 35 |
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| 36 | // Comma if nonzero number of arguments
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| 37 | #if BOOST_FUNCTION_NUM_ARGS == 0
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| 38 | # define BOOST_FUNCTION_COMMA
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| 39 | #else
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| 40 | # define BOOST_FUNCTION_COMMA ,
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| 41 | #endif // BOOST_FUNCTION_NUM_ARGS > 0
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| 42 |
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| 43 | // Class names used in this version of the code
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| 44 | #define BOOST_FUNCTION_FUNCTION BOOST_JOIN(function,BOOST_FUNCTION_NUM_ARGS)
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| 45 | #define BOOST_FUNCTION_FUNCTION_INVOKER \
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| 46 | BOOST_JOIN(function_invoker,BOOST_FUNCTION_NUM_ARGS)
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| 47 | #define BOOST_FUNCTION_VOID_FUNCTION_INVOKER \
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| 48 | BOOST_JOIN(void_function_invoker,BOOST_FUNCTION_NUM_ARGS)
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| 49 | #define BOOST_FUNCTION_FUNCTION_OBJ_INVOKER \
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| 50 | BOOST_JOIN(function_obj_invoker,BOOST_FUNCTION_NUM_ARGS)
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| 51 | #define BOOST_FUNCTION_VOID_FUNCTION_OBJ_INVOKER \
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| 52 | BOOST_JOIN(void_function_obj_invoker,BOOST_FUNCTION_NUM_ARGS)
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| 53 | #define BOOST_FUNCTION_STATELESS_FUNCTION_OBJ_INVOKER \
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| 54 | BOOST_JOIN(stateless_function_obj_invoker,BOOST_FUNCTION_NUM_ARGS)
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| 55 | #define BOOST_FUNCTION_STATELESS_VOID_FUNCTION_OBJ_INVOKER \
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| 56 | BOOST_JOIN(stateless_void_function_obj_invoker,BOOST_FUNCTION_NUM_ARGS)
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| 57 | #define BOOST_FUNCTION_GET_FUNCTION_INVOKER \
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| 58 | BOOST_JOIN(get_function_invoker,BOOST_FUNCTION_NUM_ARGS)
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| 59 | #define BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER \
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| 60 | BOOST_JOIN(get_function_obj_invoker,BOOST_FUNCTION_NUM_ARGS)
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| 61 | #define BOOST_FUNCTION_GET_STATELESS_FUNCTION_OBJ_INVOKER \
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| 62 | BOOST_JOIN(get_stateless_function_obj_invoker,BOOST_FUNCTION_NUM_ARGS)
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| 63 |
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| 64 | #ifndef BOOST_NO_VOID_RETURNS
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| 65 | # define BOOST_FUNCTION_VOID_RETURN_TYPE void
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| 66 | # define BOOST_FUNCTION_RETURN(X) X
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| 67 | #else
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| 68 | # define BOOST_FUNCTION_VOID_RETURN_TYPE ::boost::detail::function::unusable
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| 69 | # define BOOST_FUNCTION_RETURN(X) X; return BOOST_FUNCTION_VOID_RETURN_TYPE ()
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| 70 | #endif
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| 71 |
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| 72 | namespace boost {
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| 73 | namespace detail {
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| 74 | namespace function {
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| 75 | template<
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| 76 | typename FunctionPtr,
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| 77 | typename R BOOST_FUNCTION_COMMA
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| 78 | BOOST_FUNCTION_TEMPLATE_PARMS
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| 79 | >
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| 80 | struct BOOST_FUNCTION_FUNCTION_INVOKER
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| 81 | {
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| 82 | static R invoke(any_pointer function_ptr BOOST_FUNCTION_COMMA
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| 83 | BOOST_FUNCTION_PARMS)
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| 84 | {
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| 85 | FunctionPtr f = reinterpret_cast<FunctionPtr>(function_ptr.func_ptr);
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| 86 | return f(BOOST_FUNCTION_ARGS);
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| 87 | }
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| 88 | };
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| 89 |
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| 90 | template<
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| 91 | typename FunctionPtr,
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| 92 | typename R BOOST_FUNCTION_COMMA
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| 93 | BOOST_FUNCTION_TEMPLATE_PARMS
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| 94 | >
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| 95 | struct BOOST_FUNCTION_VOID_FUNCTION_INVOKER
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| 96 | {
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| 97 | static BOOST_FUNCTION_VOID_RETURN_TYPE
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| 98 | invoke(any_pointer function_ptr BOOST_FUNCTION_COMMA
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| 99 | BOOST_FUNCTION_PARMS)
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| 100 |
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| 101 | {
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| 102 | FunctionPtr f = reinterpret_cast<FunctionPtr>(function_ptr.func_ptr);
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| 103 | BOOST_FUNCTION_RETURN(f(BOOST_FUNCTION_ARGS));
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| 104 | }
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| 105 | };
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| 106 |
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| 107 | template<
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| 108 | typename FunctionObj,
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| 109 | typename R BOOST_FUNCTION_COMMA
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| 110 | BOOST_FUNCTION_TEMPLATE_PARMS
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| 111 | >
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| 112 | struct BOOST_FUNCTION_FUNCTION_OBJ_INVOKER
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| 113 | {
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| 114 | static R invoke(any_pointer function_obj_ptr BOOST_FUNCTION_COMMA
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| 115 | BOOST_FUNCTION_PARMS)
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| 116 |
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| 117 | {
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| 118 | FunctionObj* f = (FunctionObj*)(function_obj_ptr.obj_ptr);
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| 119 | return (*f)(BOOST_FUNCTION_ARGS);
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| 120 | }
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| 121 | };
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| 122 |
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| 123 | template<
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| 124 | typename FunctionObj,
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| 125 | typename R BOOST_FUNCTION_COMMA
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| 126 | BOOST_FUNCTION_TEMPLATE_PARMS
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| 127 | >
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| 128 | struct BOOST_FUNCTION_VOID_FUNCTION_OBJ_INVOKER
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| 129 | {
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| 130 | static BOOST_FUNCTION_VOID_RETURN_TYPE
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| 131 | invoke(any_pointer function_obj_ptr BOOST_FUNCTION_COMMA
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| 132 | BOOST_FUNCTION_PARMS)
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| 133 |
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| 134 | {
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| 135 | FunctionObj* f = (FunctionObj*)(function_obj_ptr.obj_ptr);
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| 136 | BOOST_FUNCTION_RETURN((*f)(BOOST_FUNCTION_ARGS));
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| 137 | }
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| 138 | };
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| 139 |
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| 140 | template<
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| 141 | typename FunctionObj,
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| 142 | typename R BOOST_FUNCTION_COMMA
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| 143 | BOOST_FUNCTION_TEMPLATE_PARMS
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| 144 | >
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| 145 | struct BOOST_FUNCTION_STATELESS_FUNCTION_OBJ_INVOKER
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| 146 | {
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| 147 | static R invoke(any_pointer BOOST_FUNCTION_COMMA BOOST_FUNCTION_PARMS)
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| 148 | {
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| 149 | FunctionObj f = FunctionObj();
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| 150 | return f(BOOST_FUNCTION_ARGS);
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| 151 | }
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| 152 | };
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| 153 |
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| 154 | template<
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| 155 | typename FunctionObj,
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| 156 | typename R BOOST_FUNCTION_COMMA
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| 157 | BOOST_FUNCTION_TEMPLATE_PARMS
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| 158 | >
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| 159 | struct BOOST_FUNCTION_STATELESS_VOID_FUNCTION_OBJ_INVOKER
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| 160 | {
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| 161 | static BOOST_FUNCTION_VOID_RETURN_TYPE
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| 162 | invoke(any_pointer BOOST_FUNCTION_COMMA BOOST_FUNCTION_PARMS)
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| 163 |
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| 164 | {
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| 165 | FunctionObj f = FunctionObj();
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| 166 | BOOST_FUNCTION_RETURN(f(BOOST_FUNCTION_ARGS));
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| 167 | }
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| 168 | };
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| 169 |
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| 170 | template<
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| 171 | typename FunctionPtr,
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| 172 | typename R BOOST_FUNCTION_COMMA
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| 173 | BOOST_FUNCTION_TEMPLATE_PARMS
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| 174 | >
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| 175 | struct BOOST_FUNCTION_GET_FUNCTION_INVOKER
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| 176 | {
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| 177 | typedef typename ct_if<(is_void<R>::value),
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| 178 | BOOST_FUNCTION_VOID_FUNCTION_INVOKER<
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| 179 | FunctionPtr,
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| 180 | R BOOST_FUNCTION_COMMA
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| 181 | BOOST_FUNCTION_TEMPLATE_ARGS
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| 182 | >,
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| 183 | BOOST_FUNCTION_FUNCTION_INVOKER<
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| 184 | FunctionPtr,
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| 185 | R BOOST_FUNCTION_COMMA
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| 186 | BOOST_FUNCTION_TEMPLATE_ARGS
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| 187 | >
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| 188 | >::type type;
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| 189 | };
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| 190 |
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| 191 | template<
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| 192 | typename FunctionObj,
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| 193 | typename R BOOST_FUNCTION_COMMA
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| 194 | BOOST_FUNCTION_TEMPLATE_PARMS
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| 195 | >
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| 196 | struct BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER
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| 197 | {
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| 198 | typedef typename ct_if<(is_void<R>::value),
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| 199 | BOOST_FUNCTION_VOID_FUNCTION_OBJ_INVOKER<
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| 200 | FunctionObj,
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| 201 | R BOOST_FUNCTION_COMMA
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| 202 | BOOST_FUNCTION_TEMPLATE_ARGS
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| 203 | >,
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| 204 | BOOST_FUNCTION_FUNCTION_OBJ_INVOKER<
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| 205 | FunctionObj,
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| 206 | R BOOST_FUNCTION_COMMA
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| 207 | BOOST_FUNCTION_TEMPLATE_ARGS
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| 208 | >
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| 209 | >::type type;
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| 210 | };
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| 211 |
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| 212 | template<
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| 213 | typename FunctionObj,
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| 214 | typename R BOOST_FUNCTION_COMMA
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| 215 | BOOST_FUNCTION_TEMPLATE_PARMS
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| 216 | >
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| 217 | struct BOOST_FUNCTION_GET_STATELESS_FUNCTION_OBJ_INVOKER
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| 218 | {
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| 219 | typedef typename ct_if<(is_void<R>::value),
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| 220 | BOOST_FUNCTION_STATELESS_VOID_FUNCTION_OBJ_INVOKER<
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| 221 | FunctionObj,
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| 222 | R BOOST_FUNCTION_COMMA
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| 223 | BOOST_FUNCTION_TEMPLATE_ARGS
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| 224 | >,
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| 225 | BOOST_FUNCTION_STATELESS_FUNCTION_OBJ_INVOKER<
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| 226 | FunctionObj,
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| 227 | R BOOST_FUNCTION_COMMA
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| 228 | BOOST_FUNCTION_TEMPLATE_ARGS
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| 229 | >
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| 230 | >::type type;
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| 231 | };
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| 232 |
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| 233 | } // end namespace function
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| 234 | } // end namespace detail
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| 235 |
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| 236 | template<
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| 237 | typename R BOOST_FUNCTION_COMMA
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| 238 | BOOST_FUNCTION_TEMPLATE_PARMS,
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| 239 | typename Allocator = BOOST_FUNCTION_DEFAULT_ALLOCATOR
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| 240 | >
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| 241 | class BOOST_FUNCTION_FUNCTION : public function_base
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| 242 | {
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| 243 | public:
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| 244 | #ifndef BOOST_NO_VOID_RETURNS
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| 245 | typedef R result_type;
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| 246 | #else
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| 247 | typedef typename detail::function::function_return_type<R>::type
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| 248 | result_type;
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| 249 | #endif // BOOST_NO_VOID_RETURNS
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| 250 |
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| 251 | private:
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| 252 | struct clear_type {};
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| 253 |
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| 254 | public:
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| 255 | BOOST_STATIC_CONSTANT(int, args = BOOST_FUNCTION_NUM_ARGS);
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| 256 |
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| 257 | // add signature for boost::lambda
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| 258 | template<typename Args>
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| 259 | struct sig
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| 260 | {
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| 261 | typedef result_type type;
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| 262 | };
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| 263 |
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| 264 | #if BOOST_FUNCTION_NUM_ARGS == 1
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| 265 | typedef T0 argument_type;
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| 266 | #elif BOOST_FUNCTION_NUM_ARGS == 2
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| 267 | typedef T0 first_argument_type;
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| 268 | typedef T1 second_argument_type;
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| 269 | #endif
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| 270 |
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| 271 | BOOST_STATIC_CONSTANT(int, arity = BOOST_FUNCTION_NUM_ARGS);
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| 272 | BOOST_FUNCTION_ARG_TYPES
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| 273 |
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| 274 | typedef Allocator allocator_type;
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| 275 | typedef BOOST_FUNCTION_FUNCTION self_type;
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| 276 |
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| 277 | BOOST_FUNCTION_FUNCTION() : function_base()
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| 278 | , invoker(0) {}
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| 279 |
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| 280 | // MSVC chokes if the following two constructors are collapsed into
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| 281 | // one with a default parameter.
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| 282 | template<typename Functor>
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| 283 | BOOST_FUNCTION_FUNCTION(Functor BOOST_FUNCTION_TARGET_FIX(const &) f
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| 284 | #ifndef BOOST_NO_SFINAE
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| 285 | ,typename enable_if_c<
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| 286 | (::boost::type_traits::ice_not<
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| 287 | (is_integral<Functor>::value)>::value),
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| 288 | int>::type = 0
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| 289 | #endif // BOOST_NO_SFINAE
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| 290 | ) :
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| 291 | function_base(),
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| 292 | invoker(0)
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| 293 | {
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| 294 | this->assign_to(f);
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| 295 | }
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| 296 |
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| 297 | #ifndef BOOST_NO_SFINAE
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| 298 | BOOST_FUNCTION_FUNCTION(clear_type*) : function_base(), invoker(0) {}
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| 299 | #else
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| 300 | BOOST_FUNCTION_FUNCTION(int zero) : function_base(), invoker(0)
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| 301 | {
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| 302 | BOOST_ASSERT(zero == 0);
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| 303 | }
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| 304 | #endif
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| 305 |
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| 306 | BOOST_FUNCTION_FUNCTION(const BOOST_FUNCTION_FUNCTION& f) :
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| 307 | function_base(),
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| 308 | invoker(0)
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| 309 | {
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| 310 | this->assign_to_own(f);
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| 311 | }
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| 312 |
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| 313 | ~BOOST_FUNCTION_FUNCTION() { clear(); }
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| 314 |
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| 315 | #if BOOST_WORKAROUND(BOOST_MSVC, <= 1200)
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| 316 | // MSVC 6.0 and prior require all definitions to be inline, but
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| 317 | // these definitions can become very costly.
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| 318 | result_type operator()(BOOST_FUNCTION_PARMS) const
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| 319 | {
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| 320 | if (this->empty())
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| 321 | boost::throw_exception(bad_function_call());
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| 322 |
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| 323 | return invoker(this->functor BOOST_FUNCTION_COMMA BOOST_FUNCTION_ARGS);
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| 324 | }
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| 325 | #else
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| 326 | result_type operator()(BOOST_FUNCTION_PARMS) const;
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| 327 | #endif
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| 328 |
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| 329 | // The distinction between when to use BOOST_FUNCTION_FUNCTION and
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| 330 | // when to use self_type is obnoxious. MSVC cannot handle self_type as
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| 331 | // the return type of these assignment operators, but Borland C++ cannot
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| 332 | // handle BOOST_FUNCTION_FUNCTION as the type of the temporary to
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| 333 | // construct.
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| 334 | template<typename Functor>
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| 335 | #ifndef BOOST_NO_SFINAE
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| 336 | typename enable_if_c<
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| 337 | (::boost::type_traits::ice_not<
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| 338 | (is_integral<Functor>::value)>::value),
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| 339 | BOOST_FUNCTION_FUNCTION&>::type
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| 340 | #else
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| 341 | BOOST_FUNCTION_FUNCTION&
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| 342 | #endif
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| 343 | operator=(Functor BOOST_FUNCTION_TARGET_FIX(const &) f)
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| 344 | {
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| 345 | self_type(f).swap(*this);
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| 346 | return *this;
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| 347 | }
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| 348 |
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| 349 | #ifndef BOOST_NO_SFINAE
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| 350 | BOOST_FUNCTION_FUNCTION& operator=(clear_type*)
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| 351 | {
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| 352 | this->clear();
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| 353 | return *this;
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| 354 | }
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| 355 | #else
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| 356 | BOOST_FUNCTION_FUNCTION& operator=(int zero)
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| 357 | {
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| 358 | BOOST_ASSERT(zero == 0);
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| 359 | this->clear();
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| 360 | return *this;
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| 361 | }
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| 362 | #endif
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| 363 |
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| 364 | // Assignment from another BOOST_FUNCTION_FUNCTION
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| 365 | BOOST_FUNCTION_FUNCTION& operator=(const BOOST_FUNCTION_FUNCTION& f)
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| 366 | {
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| 367 | if (&f == this)
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| 368 | return *this;
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| 369 |
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| 370 | self_type(f).swap(*this);
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| 371 | return *this;
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| 372 | }
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| 373 |
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| 374 | void swap(BOOST_FUNCTION_FUNCTION& other)
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| 375 | {
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| 376 | if (&other == this)
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| 377 | return;
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| 378 |
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| 379 | std::swap(this->manager, other.manager);
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| 380 | std::swap(this->functor, other.functor);
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| 381 | std::swap(invoker, other.invoker);
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| 382 | }
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| 383 |
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| 384 | // Clear out a target, if there is one
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| 385 | void clear()
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| 386 | {
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| 387 | if (this->manager) {
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| 388 | function_base::functor =
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| 389 | this->manager(this->functor, detail::function::destroy_functor_tag);
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| 390 | }
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| 391 |
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| 392 | this->manager = 0;
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| 393 | invoker = 0;
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| 394 | }
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| 395 |
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| 396 | #if (defined __SUNPRO_CC) && (__SUNPRO_CC <= 0x530) && !(defined BOOST_NO_COMPILER_CONFIG)
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| 397 | // Sun C++ 5.3 can't handle the safe_bool idiom, so don't use it
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| 398 | operator bool () const { return !this->empty(); }
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| 399 | #else
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| 400 | private:
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| 401 | struct dummy {
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| 402 | void nonnull() {};
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| 403 | };
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| 404 |
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| 405 | typedef void (dummy::*safe_bool)();
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| 406 |
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| 407 | public:
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| 408 | operator safe_bool () const
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| 409 | { return (this->empty())? 0 : &dummy::nonnull; }
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| 410 |
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| 411 | bool operator!() const
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| 412 | { return this->empty(); }
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| 413 | #endif
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| 414 |
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| 415 | private:
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| 416 | void assign_to_own(const BOOST_FUNCTION_FUNCTION& f)
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| 417 | {
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| 418 | if (!f.empty()) {
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| 419 | invoker = f.invoker;
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| 420 | this->manager = f.manager;
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| 421 | this->functor =
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| 422 | f.manager(f.functor, detail::function::clone_functor_tag);
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| 423 | }
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| 424 | }
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| 425 |
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| 426 | template<typename Functor>
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| 427 | void assign_to(Functor f)
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| 428 | {
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| 429 | typedef typename detail::function::get_function_tag<Functor>::type tag;
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| 430 | this->assign_to(f, tag());
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| 431 | }
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| 432 |
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| 433 | template<typename FunctionPtr>
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| 434 | void assign_to(FunctionPtr f, detail::function::function_ptr_tag)
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| 435 | {
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| 436 | clear();
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| 437 |
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| 438 | if (f) {
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| 439 | typedef typename detail::function::BOOST_FUNCTION_GET_FUNCTION_INVOKER<
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| 440 | FunctionPtr,
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| 441 | R BOOST_FUNCTION_COMMA
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| 442 | BOOST_FUNCTION_TEMPLATE_ARGS
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| 443 | >::type
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| 444 | actual_invoker_type;
|
---|
| 445 |
|
---|
| 446 | invoker = &actual_invoker_type::invoke;
|
---|
| 447 | this->manager =
|
---|
| 448 | &detail::function::functor_manager<FunctionPtr, Allocator>::manage;
|
---|
| 449 | this->functor =
|
---|
| 450 | this->manager(detail::function::make_any_pointer(
|
---|
| 451 | // should be a reinterpret cast, but some compilers
|
---|
| 452 | // insist on giving cv-qualifiers to free functions
|
---|
| 453 | (void (*)())(f)
|
---|
| 454 | ),
|
---|
| 455 | detail::function::clone_functor_tag);
|
---|
| 456 | }
|
---|
| 457 | }
|
---|
| 458 |
|
---|
| 459 | #if BOOST_FUNCTION_NUM_ARGS > 0
|
---|
| 460 | template<typename MemberPtr>
|
---|
| 461 | void assign_to(MemberPtr f, detail::function::member_ptr_tag)
|
---|
| 462 | {
|
---|
| 463 | this->assign_to(mem_fn(f));
|
---|
| 464 | }
|
---|
| 465 | #endif // BOOST_FUNCTION_NUM_ARGS > 0
|
---|
| 466 |
|
---|
| 467 | template<typename FunctionObj>
|
---|
| 468 | void assign_to(FunctionObj f, detail::function::function_obj_tag)
|
---|
| 469 | {
|
---|
| 470 | if (!detail::function::has_empty_target(boost::addressof(f))) {
|
---|
| 471 | typedef
|
---|
| 472 | typename detail::function::BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER<
|
---|
| 473 | FunctionObj,
|
---|
| 474 | R BOOST_FUNCTION_COMMA
|
---|
| 475 | BOOST_FUNCTION_TEMPLATE_ARGS
|
---|
| 476 | >::type
|
---|
| 477 | actual_invoker_type;
|
---|
| 478 |
|
---|
| 479 | invoker = &actual_invoker_type::invoke;
|
---|
| 480 | this->manager = &detail::function::functor_manager<
|
---|
| 481 | FunctionObj, Allocator>::manage;
|
---|
| 482 | #ifndef BOOST_NO_STD_ALLOCATOR
|
---|
| 483 | typedef typename Allocator::template rebind<FunctionObj>::other
|
---|
| 484 | rebound_allocator_type;
|
---|
| 485 | typedef typename rebound_allocator_type::pointer pointer_type;
|
---|
| 486 | rebound_allocator_type allocator;
|
---|
| 487 | pointer_type copy = allocator.allocate(1);
|
---|
| 488 | allocator.construct(copy, f);
|
---|
| 489 |
|
---|
| 490 | // Get back to the original pointer type
|
---|
| 491 | FunctionObj* new_f = static_cast<FunctionObj*>(copy);
|
---|
| 492 | #else
|
---|
| 493 | FunctionObj* new_f = new FunctionObj(f);
|
---|
| 494 | #endif // BOOST_NO_STD_ALLOCATOR
|
---|
| 495 | this->functor =
|
---|
| 496 | detail::function::make_any_pointer(static_cast<void*>(new_f));
|
---|
| 497 | }
|
---|
| 498 | }
|
---|
| 499 |
|
---|
| 500 | template<typename FunctionObj>
|
---|
| 501 | void assign_to(const reference_wrapper<FunctionObj>& f,
|
---|
| 502 | detail::function::function_obj_ref_tag)
|
---|
| 503 | {
|
---|
| 504 | if (!detail::function::has_empty_target(f.get_pointer())) {
|
---|
| 505 | typedef
|
---|
| 506 | typename detail::function::BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER<
|
---|
| 507 | FunctionObj,
|
---|
| 508 | R BOOST_FUNCTION_COMMA
|
---|
| 509 | BOOST_FUNCTION_TEMPLATE_ARGS
|
---|
| 510 | >::type
|
---|
| 511 | actual_invoker_type;
|
---|
| 512 |
|
---|
| 513 | invoker = &actual_invoker_type::invoke;
|
---|
| 514 | this->manager = &detail::function::trivial_manager<FunctionObj>::get;
|
---|
| 515 | this->functor =
|
---|
| 516 | this->manager(
|
---|
| 517 | detail::function::make_any_pointer(
|
---|
| 518 | const_cast<FunctionObj*>(f.get_pointer())),
|
---|
| 519 | detail::function::clone_functor_tag);
|
---|
| 520 | }
|
---|
| 521 | }
|
---|
| 522 |
|
---|
| 523 | template<typename FunctionObj>
|
---|
| 524 | void assign_to(FunctionObj, detail::function::stateless_function_obj_tag)
|
---|
| 525 | {
|
---|
| 526 | typedef
|
---|
| 527 | typename detail::function::
|
---|
| 528 | BOOST_FUNCTION_GET_STATELESS_FUNCTION_OBJ_INVOKER<
|
---|
| 529 | FunctionObj,
|
---|
| 530 | R BOOST_FUNCTION_COMMA
|
---|
| 531 | BOOST_FUNCTION_TEMPLATE_ARGS
|
---|
| 532 | >::type
|
---|
| 533 | actual_invoker_type;
|
---|
| 534 | invoker = &actual_invoker_type::invoke;
|
---|
| 535 | this->manager = &detail::function::trivial_manager<FunctionObj>::get;
|
---|
| 536 | this->functor = detail::function::make_any_pointer(this);
|
---|
| 537 | }
|
---|
| 538 |
|
---|
| 539 | typedef result_type (*invoker_type)(detail::function::any_pointer
|
---|
| 540 | BOOST_FUNCTION_COMMA
|
---|
| 541 | BOOST_FUNCTION_TEMPLATE_ARGS);
|
---|
| 542 |
|
---|
| 543 | invoker_type invoker;
|
---|
| 544 | };
|
---|
| 545 |
|
---|
| 546 | template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS ,
|
---|
| 547 | typename Allocator>
|
---|
| 548 | inline void swap(BOOST_FUNCTION_FUNCTION<
|
---|
| 549 | R BOOST_FUNCTION_COMMA
|
---|
| 550 | BOOST_FUNCTION_TEMPLATE_ARGS ,
|
---|
| 551 | Allocator
|
---|
| 552 | >& f1,
|
---|
| 553 | BOOST_FUNCTION_FUNCTION<
|
---|
| 554 | R BOOST_FUNCTION_COMMA
|
---|
| 555 | BOOST_FUNCTION_TEMPLATE_ARGS,
|
---|
| 556 | Allocator
|
---|
| 557 | >& f2)
|
---|
| 558 | {
|
---|
| 559 | f1.swap(f2);
|
---|
| 560 | }
|
---|
| 561 |
|
---|
| 562 | #if !BOOST_WORKAROUND(BOOST_MSVC, <= 1200)
|
---|
| 563 | template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS,
|
---|
| 564 | typename Allocator>
|
---|
| 565 | typename BOOST_FUNCTION_FUNCTION<
|
---|
| 566 | R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS,
|
---|
| 567 | Allocator>::result_type
|
---|
| 568 | BOOST_FUNCTION_FUNCTION<R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS,
|
---|
| 569 |
|
---|
| 570 | Allocator>
|
---|
| 571 | ::operator()(BOOST_FUNCTION_PARMS) const
|
---|
| 572 | {
|
---|
| 573 | if (this->empty())
|
---|
| 574 | boost::throw_exception(bad_function_call());
|
---|
| 575 |
|
---|
| 576 | return invoker(this->functor BOOST_FUNCTION_COMMA BOOST_FUNCTION_ARGS);
|
---|
| 577 | }
|
---|
| 578 | #endif
|
---|
| 579 |
|
---|
| 580 | // Poison comparisons between boost::function objects of the same type.
|
---|
| 581 | template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS ,
|
---|
| 582 | typename Allocator>
|
---|
| 583 | void operator==(const BOOST_FUNCTION_FUNCTION<
|
---|
| 584 | R BOOST_FUNCTION_COMMA
|
---|
| 585 | BOOST_FUNCTION_TEMPLATE_ARGS ,
|
---|
| 586 | Allocator>&,
|
---|
| 587 | const BOOST_FUNCTION_FUNCTION<
|
---|
| 588 | R BOOST_FUNCTION_COMMA
|
---|
| 589 | BOOST_FUNCTION_TEMPLATE_ARGS ,
|
---|
| 590 | Allocator>&);
|
---|
| 591 | template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS ,
|
---|
| 592 | typename Allocator>
|
---|
| 593 | void operator!=(const BOOST_FUNCTION_FUNCTION<
|
---|
| 594 | R BOOST_FUNCTION_COMMA
|
---|
| 595 | BOOST_FUNCTION_TEMPLATE_ARGS ,
|
---|
| 596 | Allocator>&,
|
---|
| 597 | const BOOST_FUNCTION_FUNCTION<
|
---|
| 598 | R BOOST_FUNCTION_COMMA
|
---|
| 599 | BOOST_FUNCTION_TEMPLATE_ARGS ,
|
---|
| 600 | Allocator>&);
|
---|
| 601 |
|
---|
| 602 | #if !defined(BOOST_FUNCTION_NO_FUNCTION_TYPE_SYNTAX)
|
---|
| 603 |
|
---|
| 604 | #if BOOST_FUNCTION_NUM_ARGS == 0
|
---|
| 605 | #define BOOST_FUNCTION_PARTIAL_SPEC R (void)
|
---|
| 606 | #else
|
---|
| 607 | #define BOOST_FUNCTION_PARTIAL_SPEC R (BOOST_PP_ENUM_PARAMS(BOOST_FUNCTION_NUM_ARGS,T))
|
---|
| 608 | #endif
|
---|
| 609 |
|
---|
| 610 | template<typename R BOOST_FUNCTION_COMMA
|
---|
| 611 | BOOST_FUNCTION_TEMPLATE_PARMS,
|
---|
| 612 | typename Allocator>
|
---|
| 613 | class function<BOOST_FUNCTION_PARTIAL_SPEC, Allocator>
|
---|
| 614 | : public BOOST_FUNCTION_FUNCTION<R, BOOST_FUNCTION_TEMPLATE_ARGS
|
---|
| 615 | BOOST_FUNCTION_COMMA Allocator>
|
---|
| 616 | {
|
---|
| 617 | typedef BOOST_FUNCTION_FUNCTION<R, BOOST_FUNCTION_TEMPLATE_ARGS
|
---|
| 618 | BOOST_FUNCTION_COMMA Allocator> base_type;
|
---|
| 619 | typedef function self_type;
|
---|
| 620 |
|
---|
| 621 | struct clear_type {};
|
---|
| 622 |
|
---|
| 623 | public:
|
---|
| 624 | typedef typename base_type::allocator_type allocator_type;
|
---|
| 625 |
|
---|
| 626 | function() : base_type() {}
|
---|
| 627 |
|
---|
| 628 | template<typename Functor>
|
---|
| 629 | function(Functor f
|
---|
| 630 | #ifndef BOOST_NO_SFINAE
|
---|
| 631 | ,typename enable_if_c<
|
---|
| 632 | (::boost::type_traits::ice_not<
|
---|
| 633 | (is_integral<Functor>::value)>::value),
|
---|
| 634 | int>::type = 0
|
---|
| 635 | #endif
|
---|
| 636 | ) :
|
---|
| 637 | base_type(f)
|
---|
| 638 | {
|
---|
| 639 | }
|
---|
| 640 |
|
---|
| 641 | #ifndef BOOST_NO_SFINAE
|
---|
| 642 | function(clear_type*) : base_type() {}
|
---|
| 643 | #endif
|
---|
| 644 |
|
---|
| 645 | function(const self_type& f) : base_type(static_cast<const base_type&>(f)){}
|
---|
| 646 |
|
---|
| 647 | function(const base_type& f) : base_type(static_cast<const base_type&>(f)){}
|
---|
| 648 |
|
---|
| 649 | self_type& operator=(const self_type& f)
|
---|
| 650 | {
|
---|
| 651 | self_type(f).swap(*this);
|
---|
| 652 | return *this;
|
---|
| 653 | }
|
---|
| 654 |
|
---|
| 655 | template<typename Functor>
|
---|
| 656 | #ifndef BOOST_NO_SFINAE
|
---|
| 657 | typename enable_if_c<
|
---|
| 658 | (::boost::type_traits::ice_not<
|
---|
| 659 | (is_integral<Functor>::value)>::value),
|
---|
| 660 | self_type&>::type
|
---|
| 661 | #else
|
---|
| 662 | self_type&
|
---|
| 663 | #endif
|
---|
| 664 | operator=(Functor f)
|
---|
| 665 | {
|
---|
| 666 | self_type(f).swap(*this);
|
---|
| 667 | return *this;
|
---|
| 668 | }
|
---|
| 669 |
|
---|
| 670 | #ifndef BOOST_NO_SFINAE
|
---|
| 671 | self_type& operator=(clear_type*)
|
---|
| 672 | {
|
---|
| 673 | this->clear();
|
---|
| 674 | return *this;
|
---|
| 675 | }
|
---|
| 676 | #endif
|
---|
| 677 |
|
---|
| 678 | self_type& operator=(const base_type& f)
|
---|
| 679 | {
|
---|
| 680 | self_type(f).swap(*this);
|
---|
| 681 | return *this;
|
---|
| 682 | }
|
---|
| 683 | };
|
---|
| 684 |
|
---|
| 685 | #undef BOOST_FUNCTION_PARTIAL_SPEC
|
---|
| 686 | #endif // have partial specialization
|
---|
| 687 |
|
---|
| 688 | } // end namespace boost
|
---|
| 689 |
|
---|
| 690 | // Cleanup after ourselves...
|
---|
| 691 | #undef BOOST_FUNCTION_DEFAULT_ALLOCATOR
|
---|
| 692 | #undef BOOST_FUNCTION_COMMA
|
---|
| 693 | #undef BOOST_FUNCTION_FUNCTION
|
---|
| 694 | #undef BOOST_FUNCTION_FUNCTION_INVOKER
|
---|
| 695 | #undef BOOST_FUNCTION_VOID_FUNCTION_INVOKER
|
---|
| 696 | #undef BOOST_FUNCTION_FUNCTION_OBJ_INVOKER
|
---|
| 697 | #undef BOOST_FUNCTION_VOID_FUNCTION_OBJ_INVOKER
|
---|
| 698 | #undef BOOST_FUNCTION_STATELESS_FUNCTION_OBJ_INVOKER
|
---|
| 699 | #undef BOOST_FUNCTION_STATELESS_VOID_FUNCTION_OBJ_INVOKER
|
---|
| 700 | #undef BOOST_FUNCTION_GET_FUNCTION_INVOKER
|
---|
| 701 | #undef BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER
|
---|
| 702 | #undef BOOST_FUNCTION_GET_STATELESS_FUNCTION_OBJ_INVOKER
|
---|
| 703 | #undef BOOST_FUNCTION_GET_MEM_FUNCTION_INVOKER
|
---|
| 704 | #undef BOOST_FUNCTION_TEMPLATE_PARMS
|
---|
| 705 | #undef BOOST_FUNCTION_TEMPLATE_ARGS
|
---|
| 706 | #undef BOOST_FUNCTION_PARMS
|
---|
| 707 | #undef BOOST_FUNCTION_PARM
|
---|
| 708 | #undef BOOST_FUNCTION_ARGS
|
---|
| 709 | #undef BOOST_FUNCTION_ARG_TYPE
|
---|
| 710 | #undef BOOST_FUNCTION_ARG_TYPES
|
---|
| 711 | #undef BOOST_FUNCTION_VOID_RETURN_TYPE
|
---|
| 712 | #undef BOOST_FUNCTION_RETURN
|
---|