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| 1 /* |
| 2 The %implict macro allows a SwigType (Class) to be accepted |
| 3 as an input parameter and use its implicit constructors when needed. |
| 4 |
| 5 For example: |
| 6 |
| 7 |
| 8 %implicit(A, int, double, B); |
| 9 |
| 10 %inline |
| 11 { |
| 12 struct B { }; |
| 13 struct A |
| 14 { |
| 15 int ii; |
| 16 A(int i) { ii = 1; } |
| 17 A(double d) { ii = 2; } |
| 18 A(const B& b) { ii = 3; } |
| 19 }; |
| 20 |
| 21 int get(A a) { return a.ii; } |
| 22 } |
| 23 |
| 24 Here, you can call 'get' as |
| 25 |
| 26 get(1) ==> get(A(1)) |
| 27 get(2.0) ==> get(A(2.0)) |
| 28 get(B()) ==> get(A(B())) |
| 29 |
| 30 and swig will construct an 'A' temporal variable using the |
| 31 corresponding implicit constructor. |
| 32 |
| 33 |
| 34 The plain implicit macro takes care of simple type list. If it doesn't |
| 35 work because you are passing template types with commas, then use |
| 36 the %implicit_{1,2,3} versions and/or the %arg macro. |
| 37 |
| 38 */ |
| 39 |
| 40 %define %implicit_type(Type...) |
| 41 %traits_swigtype(Type); |
| 42 %enddef |
| 43 |
| 44 %define %implicit_frag(Type...) ,fragment=SWIG_Traits_frag(Type) %enddef |
| 45 |
| 46 %define %implicit_code(Type...) |
| 47 { |
| 48 Type _v; |
| 49 int res = swig::asval<Type >(obj, &_v); |
| 50 if (SWIG_IsOK(res)) { |
| 51 if (val) *val = new value_type(static_cast<const Type& >(_v)); |
| 52 return SWIG_AddNewMask(res); |
| 53 } |
| 54 } |
| 55 %enddef |
| 56 |
| 57 /* implicit */ |
| 58 |
| 59 %define %implicit(Type, ...) |
| 60 |
| 61 %formacro_1(%implicit_type,__VA_ARGS__); |
| 62 |
| 63 %fragment(SWIG_Traits_frag(Type),"header", |
| 64 fragment="StdTraits" |
| 65 %formacro_1(%implicit_frag,__VA_ARGS__)) %{ |
| 66 namespace swig { |
| 67 template <> struct traits<Type > { |
| 68 typedef pointer_category category; |
| 69 static const char* type_name() { return "Type"; } |
| 70 }; |
| 71 |
| 72 template <> struct traits_asptr< Type > { |
| 73 typedef Type value_type; |
| 74 static int asptr(SWIG_Object obj, value_type **val) { |
| 75 Type *vptr; |
| 76 static swig_type_info* desc = SWIG_TypeQuery("Type *"); |
| 77 int res = SWIG_ConvertPtr(obj, (void **)&vptr, desc, 0); |
| 78 if (SWIG_IsOK(res)) { |
| 79 if (val) *val = vptr; |
| 80 return res; |
| 81 } else { |
| 82 %formacro_1(%implicit_code,__VA_ARGS__) |
| 83 } |
| 84 return SWIG_TypeError; |
| 85 } |
| 86 }; |
| 87 } |
| 88 %} |
| 89 |
| 90 %typemap_traits_ptr(%checkcode(POINTER),Type); |
| 91 %enddef |
| 92 |
| 93 /* implicit_1 */ |
| 94 |
| 95 |
| 96 %define %implicit_1(Type, Imp1) |
| 97 %traits_swigtype(Imp1); |
| 98 |
| 99 %fragment(SWIG_Traits_frag(Type),"header", |
| 100 fragment="StdTraits", |
| 101 fragment=SWIG_Traits_frag(Imp1)) %{ |
| 102 namespace swig { |
| 103 template <> struct traits< Type > { |
| 104 typedef pointer_category category; |
| 105 static const char* type_name() { return "Type"; } |
| 106 }; |
| 107 |
| 108 template <> struct traits_asptr< Type > { |
| 109 typedef Type value_type; |
| 110 static int asptr(SWIG_Object obj, value_type **val) { |
| 111 Type *vptr; |
| 112 static swig_type_info* desc = SWIG_TypeQuery("Type *"); |
| 113 int res = SWIG_ConvertPtr(obj, (void **)&vptr, desc, 0); |
| 114 if (SWIG_IsOK(res)) { |
| 115 if (val) *val = vptr; |
| 116 return res; |
| 117 } else { |
| 118 %implicit_code(Imp1); |
| 119 } |
| 120 return SWIG_TypeError; |
| 121 } |
| 122 }; |
| 123 } |
| 124 %} |
| 125 |
| 126 %typemap_traits_ptr(%checkcode(POINTER),Type); |
| 127 |
| 128 %enddef |
| 129 |
| 130 /* implicit_2 */ |
| 131 |
| 132 %define %implicit_2(Type, Imp1, Imp2) |
| 133 %traits_swigtype(Imp1); |
| 134 %traits_swigtype(Imp2); |
| 135 |
| 136 %fragment(SWIG_Traits_frag(Type),"header", |
| 137 fragment="StdTraits", |
| 138 fragment=SWIG_Traits_frag(Imp1), |
| 139 fragment=SWIG_Traits_frag(Imp2)) %{ |
| 140 namespace swig { |
| 141 template <> struct traits< Type > { |
| 142 typedef pointer_category category; |
| 143 static const char* type_name() { return "Type"; } |
| 144 }; |
| 145 |
| 146 template <> struct traits_asptr< Type > { |
| 147 typedef Type value_type; |
| 148 static int asptr(SWIG_Object obj, value_type **val) { |
| 149 Type *vptr; |
| 150 static swig_type_info* desc = SWIG_TypeQuery("Type *"); |
| 151 int res = SWIG_ConvertPtr(obj, (void **)&vptr, desc, 0); |
| 152 if (SWIG_IsOK(res)) { |
| 153 if (val) *val = vptr; |
| 154 return SWIG_OLDOBJ; |
| 155 } else { |
| 156 %implicit_code(Imp1); |
| 157 %implicit_code(Imp2); |
| 158 } |
| 159 return SWIG_TypeError; |
| 160 } |
| 161 }; |
| 162 } |
| 163 %} |
| 164 |
| 165 %typemap_traits_ptr(%checkcode(POINTER),Type); |
| 166 %enddef |
| 167 |
| 168 |
| 169 /* implicit_3 */ |
| 170 |
| 171 %define %implicit_3(Type, Imp1, Imp2, Imp3) |
| 172 %traits_swigtype(Imp1); |
| 173 %traits_swigtype(Imp2); |
| 174 %traits_swigtype(Imp3); |
| 175 |
| 176 %fragment(SWIG_Traits_frag(Type),"header", |
| 177 fragment="StdTraits", |
| 178 fragment=SWIG_Traits_frag(Imp1), |
| 179 fragment=SWIG_Traits_frag(Imp2), |
| 180 fragment=SWIG_Traits_frag(Imp3)) %{ |
| 181 namespace swig { |
| 182 template <> struct traits< Type > { |
| 183 typedef pointer_category category; |
| 184 static const char* type_name() { return "Type"; } |
| 185 }; |
| 186 |
| 187 template <> struct traits_asptr< Type > { |
| 188 typedef Type value_type; |
| 189 static int asptr(SWIG_Object obj, value_type **val) { |
| 190 Type *vptr; |
| 191 static swig_type_info* desc = SWIG_TypeQuery("Type *"); |
| 192 int res = SWIG_ConvertPtr(obj, (void **)&vptr, desc, 0); |
| 193 if (SWIG_IsOK(res)) { |
| 194 if (val) *val = vptr; |
| 195 return res; |
| 196 } else { |
| 197 %implicit_code(Imp1); |
| 198 %implicit_code(Imp2); |
| 199 %implicit_code(Imp3); |
| 200 } |
| 201 return SWIG_TypeError; |
| 202 } |
| 203 }; |
| 204 } |
| 205 %} |
| 206 |
| 207 %typemap_traits_ptr(%checkcode(POINTER),Type); |
| 208 %enddef |
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