Mercurial > projects > ddmd
annotate dmd/TemplateTypeParameter.d @ 132:c494af1dba80
Fixes for dmd 2.037
| author | Eldar Insafutdinov <e.insafutdinov@gmail.com> |
|---|---|
| date | Fri, 10 Sep 2010 19:14:09 +0100 |
| parents | e28b18c23469 |
| children | e3afd1303184 |
| rev | line source |
|---|---|
| 0 | 1 module dmd.TemplateTypeParameter; |
| 2 | |
| 114 | 3 import dmd.common; |
| 0 | 4 import dmd.TemplateParameter; |
| 5 import dmd.Type; | |
| 6 import dmd.Loc; | |
| 7 import dmd.Identifier; | |
| 8 import dmd.Scope; | |
| 9 import dmd.OutBuffer; | |
| 10 import dmd.HdrGenState; | |
| 11 import dmd.Declaration; | |
| 12 import dmd.ArrayTypes; | |
| 13 import dmd.TypeIdentifier; | |
| 14 import dmd.AliasDeclaration; | |
| 15 import dmd.Util; | |
| 16 import dmd.MATCH; | |
| 17 import dmd.Dsymbol; | |
| 18 | |
| 19 class TemplateTypeParameter : TemplateParameter | |
| 20 { | |
| 21 /* Syntax: | |
| 22 * ident : specType = defaultType | |
| 23 */ | |
| 24 Type specType; // type parameter: if !=null, this is the type specialization | |
| 25 Type defaultType; | |
| 26 | |
| 27 this(Loc loc, Identifier ident, Type specType, Type defaultType) | |
| 28 { | |
| 29 super(loc, ident); | |
| 30 this.ident = ident; | |
| 31 this.specType = specType; | |
| 32 this.defaultType = defaultType; | |
| 33 } | |
| 34 | |
| 72 | 35 override TemplateTypeParameter isTemplateTypeParameter() |
| 0 | 36 { |
| 37 return this; | |
| 38 } | |
| 39 | |
| 72 | 40 override TemplateParameter syntaxCopy() |
| 0 | 41 { |
| 51 | 42 TemplateTypeParameter tp = new TemplateTypeParameter(loc, ident, specType, defaultType); |
| 43 if (tp.specType) | |
| 44 tp.specType = specType.syntaxCopy(); | |
| 45 if (defaultType) | |
| 46 tp.defaultType = defaultType.syntaxCopy(); | |
| 47 return tp; | |
| 0 | 48 } |
| 49 | |
| 72 | 50 override void declareParameter(Scope sc) |
| 0 | 51 { |
| 52 //printf("TemplateTypeParameter.declareParameter('%s')\n", ident.toChars()); | |
| 53 TypeIdentifier ti = new TypeIdentifier(loc, ident); | |
| 54 sparam = new AliasDeclaration(loc, ident, ti); | |
| 55 if (!sc.insert(sparam)) | |
| 56 error(loc, "parameter '%s' multiply defined", ident.toChars()); | |
| 57 } | |
| 58 | |
| 72 | 59 override void semantic(Scope sc) |
| 0 | 60 { |
| 61 //printf("TemplateTypeParameter.semantic('%s')\n", ident.toChars()); | |
| 62 if (specType) | |
| 63 { | |
| 64 specType = specType.semantic(loc, sc); | |
| 65 } | |
| 66 static if (false) { // Don't do semantic() until instantiation | |
| 67 if (defaultType) | |
| 68 { | |
| 69 defaultType = defaultType.semantic(loc, sc); | |
| 70 } | |
| 71 } | |
| 72 } | |
| 73 | |
| 72 | 74 override void print(Object oarg, Object oded) |
| 0 | 75 { |
| 76 assert(false); | |
| 77 } | |
| 78 | |
| 72 | 79 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 80 { |
| 81 buf.writestring(ident.toChars()); | |
| 82 if (specType) | |
| 83 { | |
| 84 buf.writestring(" : "); | |
| 85 specType.toCBuffer(buf, null, hgs); | |
| 86 } | |
| 87 if (defaultType) | |
| 88 { | |
| 89 buf.writestring(" = "); | |
| 90 defaultType.toCBuffer(buf, null, hgs); | |
| 91 } | |
| 92 } | |
| 93 | |
| 72 | 94 override Object specialization() |
| 0 | 95 { |
| 96 return specType; | |
| 97 } | |
| 98 | |
| 72 | 99 override Object defaultArg(Loc loc, Scope sc) |
| 0 | 100 { |
| 101 Type t; | |
| 102 | |
| 103 t = defaultType; | |
| 104 if (t) | |
| 105 { | |
| 106 t = t.syntaxCopy(); | |
| 107 t = t.semantic(loc, sc); | |
| 108 } | |
| 109 return t; | |
| 110 } | |
| 111 | |
| 72 | 112 override bool overloadMatch(TemplateParameter) |
| 0 | 113 { |
| 114 assert(false); | |
| 115 } | |
| 116 | |
| 117 /******************************************* | |
| 118 * Match to a particular TemplateParameter. | |
| 119 * Input: | |
| 120 * i i'th argument | |
| 121 * tiargs[] actual arguments to template instance | |
| 122 * parameters[] template parameters | |
| 123 * dedtypes[] deduced arguments to template instance | |
| 124 * *psparam set to symbol declared and initialized to dedtypes[i] | |
| 125 * flags 1: don't do 'toHeadMutable()' | |
| 126 */ | |
| 72 | 127 override MATCH matchArg(Scope sc, Objects tiargs, int i, TemplateParameters parameters, Objects dedtypes, Declaration* psparam, int flags) |
| 0 | 128 { |
| 129 //printf("TemplateTypeParameter.matchArg()\n"); | |
| 130 Type t; | |
| 131 Object oarg; | |
| 132 MATCH m = MATCHexact; | |
| 133 Type ta; | |
| 134 | |
| 135 if (i < tiargs.dim) | |
|
113
3482c73a991b
More cleanup for arrays
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
94
diff
changeset
|
136 oarg = tiargs[i]; |
| 0 | 137 else |
| 138 { | |
| 139 // Get default argument instead | |
| 140 oarg = defaultArg(loc, sc); | |
| 141 if (!oarg) | |
| 142 { | |
| 143 assert(i < dedtypes.dim); | |
| 144 // It might have already been deduced | |
|
113
3482c73a991b
More cleanup for arrays
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
94
diff
changeset
|
145 oarg = dedtypes[i]; |
| 0 | 146 if (!oarg) |
| 147 { | |
| 148 goto Lnomatch; | |
| 149 } | |
| 150 flags |= 1; // already deduced, so don't to toHeadMutable() | |
| 151 } | |
| 152 } | |
| 153 | |
| 154 ta = isType(oarg); | |
| 155 if (!ta) | |
| 156 { | |
| 157 //printf("%s %p %p %p\n", oarg.toChars(), isExpression(oarg), isDsymbol(oarg), isTuple(oarg)); | |
| 158 goto Lnomatch; | |
| 159 } | |
| 160 //printf("ta is %s\n", ta.toChars()); | |
| 161 | |
|
113
3482c73a991b
More cleanup for arrays
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
94
diff
changeset
|
162 t = cast(Type)dedtypes[i]; |
| 0 | 163 |
| 164 if (specType) | |
| 165 { | |
| 166 //printf("\tcalling deduceType(): ta is %s, specType is %s\n", ta.toChars(), specType.toChars()); | |
| 167 MATCH m2 = ta.deduceType(sc, specType, parameters, dedtypes); | |
| 168 if (m2 == MATCHnomatch) | |
| 169 { | |
| 170 //printf("\tfailed deduceType\n"); | |
| 171 goto Lnomatch; | |
| 172 } | |
| 173 | |
| 174 if (m2 < m) | |
| 175 m = m2; | |
|
113
3482c73a991b
More cleanup for arrays
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
94
diff
changeset
|
176 t = cast(Type)dedtypes[i]; |
| 0 | 177 } |
| 178 else | |
| 179 { | |
| 180 // So that matches with specializations are better | |
| 181 m = MATCHconvert; | |
| 182 | |
| 183 /* This is so that: | |
| 184 * template Foo(T), Foo!(const int), => ta == int | |
| 185 */ | |
| 186 // if (!(flags & 1)) | |
| 187 // ta = ta.toHeadMutable(); | |
| 188 | |
| 189 if (t) | |
| 190 { // Must match already deduced type | |
| 191 | |
| 192 m = MATCHexact; | |
| 193 if (!t.equals(ta)) | |
| 194 { | |
| 195 //printf("t = %s ta = %s\n", t.toChars(), ta.toChars()); | |
| 196 goto Lnomatch; | |
| 197 } | |
| 198 } | |
| 199 } | |
| 200 | |
| 201 if (!t) | |
| 202 { | |
|
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Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
72
diff
changeset
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203 dedtypes[i] = ta; |
| 0 | 204 t = ta; |
| 205 } | |
| 206 | |
| 207 *psparam = new AliasDeclaration(loc, ident, t); | |
| 208 //printf("\tm = %d\n", m); | |
| 209 return m; | |
| 210 | |
| 211 Lnomatch: | |
| 212 *psparam = null; | |
| 213 //printf("\tm = %d\n", MATCHnomatch); | |
| 214 return MATCHnomatch; | |
| 215 } | |
| 216 | |
|
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Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
72
diff
changeset
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217 override Object dummyArg() |
| 0 | 218 { |
| 51 | 219 Type t; |
| 220 | |
| 221 if (specType) | |
| 222 t = specType; | |
| 223 else | |
| 224 { | |
| 225 // Use this for alias-parameter's too (?) | |
| 226 t = new TypeIdentifier(loc, ident); | |
| 227 } | |
|
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Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
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diff
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228 return t; |
| 0 | 229 } |
| 72 | 230 } |