[12] | 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; |
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| 445 | |
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| 446 | invoker = &actual_invoker_type::invoke; |
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| 447 | this->manager = |
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| 448 | &detail::function::functor_manager<FunctionPtr, Allocator>::manage; |
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| 449 | this->functor = |
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| 450 | this->manager(detail::function::make_any_pointer( |
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| 451 | // should be a reinterpret cast, but some compilers |
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| 452 | // insist on giving cv-qualifiers to free functions |
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| 453 | (void (*)())(f) |
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| 454 | ), |
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| 455 | detail::function::clone_functor_tag); |
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| 456 | } |
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| 457 | } |
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| 458 | |
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| 459 | #if BOOST_FUNCTION_NUM_ARGS > 0 |
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| 460 | template<typename MemberPtr> |
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| 461 | void assign_to(MemberPtr f, detail::function::member_ptr_tag) |
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| 462 | { |
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| 463 | this->assign_to(mem_fn(f)); |
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| 464 | } |
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| 465 | #endif // BOOST_FUNCTION_NUM_ARGS > 0 |
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| 466 | |
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| 467 | template<typename FunctionObj> |
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| 468 | void assign_to(FunctionObj f, detail::function::function_obj_tag) |
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| 469 | { |
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| 470 | if (!detail::function::has_empty_target(boost::addressof(f))) { |
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| 471 | typedef |
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| 472 | typename detail::function::BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER< |
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| 473 | FunctionObj, |
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| 474 | R BOOST_FUNCTION_COMMA |
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| 475 | BOOST_FUNCTION_TEMPLATE_ARGS |
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| 476 | >::type |
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| 477 | actual_invoker_type; |
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| 478 | |
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| 479 | invoker = &actual_invoker_type::invoke; |
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| 480 | this->manager = &detail::function::functor_manager< |
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| 481 | FunctionObj, Allocator>::manage; |
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| 482 | #ifndef BOOST_NO_STD_ALLOCATOR |
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| 483 | typedef typename Allocator::template rebind<FunctionObj>::other |
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| 484 | rebound_allocator_type; |
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| 485 | typedef typename rebound_allocator_type::pointer pointer_type; |
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| 486 | rebound_allocator_type allocator; |
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| 487 | pointer_type copy = allocator.allocate(1); |
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| 488 | allocator.construct(copy, f); |
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| 489 | |
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| 490 | // Get back to the original pointer type |
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| 491 | FunctionObj* new_f = static_cast<FunctionObj*>(copy); |
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| 492 | #else |
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| 493 | FunctionObj* new_f = new FunctionObj(f); |
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| 494 | #endif // BOOST_NO_STD_ALLOCATOR |
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| 495 | this->functor = |
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| 496 | detail::function::make_any_pointer(static_cast<void*>(new_f)); |
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| 497 | } |
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| 498 | } |
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| 499 | |
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| 500 | template<typename FunctionObj> |
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| 501 | void assign_to(const reference_wrapper<FunctionObj>& f, |
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| 502 | detail::function::function_obj_ref_tag) |
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| 503 | { |
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| 504 | if (!detail::function::has_empty_target(f.get_pointer())) { |
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| 505 | typedef |
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| 506 | typename detail::function::BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER< |
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| 507 | FunctionObj, |
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| 508 | R BOOST_FUNCTION_COMMA |
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| 509 | BOOST_FUNCTION_TEMPLATE_ARGS |
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| 510 | >::type |
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| 511 | actual_invoker_type; |
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| 512 | |
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| 513 | invoker = &actual_invoker_type::invoke; |
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| 514 | this->manager = &detail::function::trivial_manager<FunctionObj>::get; |
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| 515 | this->functor = |
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| 516 | this->manager( |
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| 517 | detail::function::make_any_pointer( |
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| 518 | const_cast<FunctionObj*>(f.get_pointer())), |
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| 519 | detail::function::clone_functor_tag); |
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| 520 | } |
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| 521 | } |
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| 522 | |
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| 523 | template<typename FunctionObj> |
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| 524 | void assign_to(FunctionObj, detail::function::stateless_function_obj_tag) |
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| 525 | { |
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| 526 | typedef |
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| 527 | typename detail::function:: |
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| 528 | BOOST_FUNCTION_GET_STATELESS_FUNCTION_OBJ_INVOKER< |
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| 529 | FunctionObj, |
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| 530 | R BOOST_FUNCTION_COMMA |
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| 531 | BOOST_FUNCTION_TEMPLATE_ARGS |
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| 532 | >::type |
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| 533 | actual_invoker_type; |
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| 534 | invoker = &actual_invoker_type::invoke; |
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| 535 | this->manager = &detail::function::trivial_manager<FunctionObj>::get; |
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| 536 | this->functor = detail::function::make_any_pointer(this); |
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| 537 | } |
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| 538 | |
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| 539 | typedef result_type (*invoker_type)(detail::function::any_pointer |
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| 540 | BOOST_FUNCTION_COMMA |
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| 541 | BOOST_FUNCTION_TEMPLATE_ARGS); |
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| 542 | |
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| 543 | invoker_type invoker; |
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| 544 | }; |
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| 545 | |
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| 546 | template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS , |
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| 547 | typename Allocator> |
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| 548 | inline void swap(BOOST_FUNCTION_FUNCTION< |
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| 549 | R BOOST_FUNCTION_COMMA |
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| 550 | BOOST_FUNCTION_TEMPLATE_ARGS , |
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| 551 | Allocator |
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| 552 | >& f1, |
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| 553 | BOOST_FUNCTION_FUNCTION< |
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| 554 | R BOOST_FUNCTION_COMMA |
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| 555 | BOOST_FUNCTION_TEMPLATE_ARGS, |
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| 556 | Allocator |
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| 557 | >& f2) |
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| 558 | { |
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| 559 | f1.swap(f2); |
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| 560 | } |
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| 561 | |
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| 562 | #if !BOOST_WORKAROUND(BOOST_MSVC, <= 1200) |
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| 563 | template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS, |
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| 564 | typename Allocator> |
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| 565 | typename BOOST_FUNCTION_FUNCTION< |
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| 566 | R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS, |
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| 567 | Allocator>::result_type |
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| 568 | BOOST_FUNCTION_FUNCTION<R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS, |
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| 569 | |
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| 570 | Allocator> |
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| 571 | ::operator()(BOOST_FUNCTION_PARMS) const |
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| 572 | { |
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| 573 | if (this->empty()) |
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| 574 | boost::throw_exception(bad_function_call()); |
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| 575 | |
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| 576 | return invoker(this->functor BOOST_FUNCTION_COMMA BOOST_FUNCTION_ARGS); |
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| 577 | } |
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| 578 | #endif |
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| 579 | |
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| 580 | // Poison comparisons between boost::function objects of the same type. |
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| 581 | template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS , |
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| 582 | typename Allocator> |
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| 583 | void operator==(const BOOST_FUNCTION_FUNCTION< |
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| 584 | R BOOST_FUNCTION_COMMA |
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| 585 | BOOST_FUNCTION_TEMPLATE_ARGS , |
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| 586 | Allocator>&, |
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| 587 | const BOOST_FUNCTION_FUNCTION< |
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| 588 | R BOOST_FUNCTION_COMMA |
---|
| 589 | BOOST_FUNCTION_TEMPLATE_ARGS , |
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| 590 | Allocator>&); |
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| 591 | template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS , |
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| 592 | typename Allocator> |
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| 593 | void operator!=(const BOOST_FUNCTION_FUNCTION< |
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| 594 | R BOOST_FUNCTION_COMMA |
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| 595 | BOOST_FUNCTION_TEMPLATE_ARGS , |
---|
| 596 | Allocator>&, |
---|
| 597 | const BOOST_FUNCTION_FUNCTION< |
---|
| 598 | R BOOST_FUNCTION_COMMA |
---|
| 599 | BOOST_FUNCTION_TEMPLATE_ARGS , |
---|
| 600 | Allocator>&); |
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| 601 | |
---|
| 602 | #if !defined(BOOST_FUNCTION_NO_FUNCTION_TYPE_SYNTAX) |
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| 603 | |
---|
| 604 | #if BOOST_FUNCTION_NUM_ARGS == 0 |
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| 605 | #define BOOST_FUNCTION_PARTIAL_SPEC R (void) |
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| 606 | #else |
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| 607 | #define BOOST_FUNCTION_PARTIAL_SPEC R (BOOST_PP_ENUM_PARAMS(BOOST_FUNCTION_NUM_ARGS,T)) |
---|
| 608 | #endif |
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| 609 | |
---|
| 610 | template<typename R BOOST_FUNCTION_COMMA |
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| 611 | BOOST_FUNCTION_TEMPLATE_PARMS, |
---|
| 612 | typename Allocator> |
---|
| 613 | class function<BOOST_FUNCTION_PARTIAL_SPEC, Allocator> |
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| 614 | : public BOOST_FUNCTION_FUNCTION<R, BOOST_FUNCTION_TEMPLATE_ARGS |
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| 615 | BOOST_FUNCTION_COMMA Allocator> |
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| 616 | { |
---|
| 617 | typedef BOOST_FUNCTION_FUNCTION<R, BOOST_FUNCTION_TEMPLATE_ARGS |
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| 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< |
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| 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 |
---|