Mercurial > projects > ddmd
annotate dmd/ScopeDsymbol.d @ 187:b0d41ff5e0df
Added expandability scheme outlined in http://www.dsource.org/forums/viewtopic.php?t=5659&sid=6f2150ff5b0bffcd47512a6a7608d218
| author | Abscissa |
|---|---|
| date | Tue, 07 Jun 2011 23:37:34 -0400 |
| parents | e3afd1303184 |
| children |
| rev | line source |
|---|---|
| 0 | 1 module dmd.ScopeDsymbol; |
| 2 | |
| 114 | 3 import dmd.common; |
| 0 | 4 import dmd.Dsymbol; |
| 5 import dmd.Declaration; | |
| 6 import dmd.Array; | |
| 7 import dmd.OverloadSet; | |
| 8 import dmd.Import; | |
| 9 import dmd.DsymbolTable; | |
| 10 import dmd.Identifier; | |
| 11 import dmd.Loc; | |
| 12 import dmd.PROT; | |
| 13 import dmd.FuncDeclaration; | |
| 14 import dmd.Scope; | |
| 15 import dmd.Util; | |
| 16 import dmd.Id; | |
| 17 import dmd.expression.Util; | |
| 18 | |
|
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19 import dmd.DDMDExtensions; |
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20 |
| 79 | 21 import std.stdio : writef; |
| 22 //core.stdc.stdlib; | |
| 4 | 23 import core.memory; |
| 0 | 24 |
| 25 class ScopeDsymbol : Dsymbol | |
| 26 { | |
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27 mixin insertMemberExtension!(typeof(this)); |
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28 |
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29 Dsymbols members; // all Dsymbol's in this scope |
| 0 | 30 DsymbolTable symtab; // members[] sorted into table |
| 31 | |
| 32 Array imports; // imported ScopeDsymbol's | |
| 33 PROT* prots; // array of PROT, one for each import | |
| 34 | |
| 35 this() | |
| 36 { | |
| 178 | 37 register(); |
| 0 | 38 // do nothing |
| 39 } | |
| 40 | |
| 41 this(Identifier id) | |
| 42 { | |
| 178 | 43 register(); |
| 0 | 44 super(id); |
| 45 } | |
| 46 | |
| 72 | 47 override Dsymbol syntaxCopy(Dsymbol s) |
| 0 | 48 { |
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49 //printf("ScopeDsymbol.syntaxCopy('%s')\n", toChars()); |
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50 |
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51 ScopeDsymbol sd; |
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52 if (s) |
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53 sd = cast(ScopeDsymbol)s; |
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54 else |
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55 sd = new ScopeDsymbol(ident); |
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56 sd.members = arraySyntaxCopy(members); |
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57 return sd; |
| 0 | 58 } |
| 59 | |
| 72 | 60 override Dsymbol search(Loc loc, Identifier ident, int flags) |
| 0 | 61 { |
| 62 //printf("%s.ScopeDsymbol.search(ident='%s', flags=x%x)\n", toChars(), ident.toChars(), flags); | |
| 63 //if (strcmp(ident.toChars(),"c") == 0) *(char*)0=0; | |
| 64 | |
| 65 // Look in symbols declared in this module | |
| 66 Dsymbol s = symtab ? symtab.lookup(ident) : null; | |
| 79 | 67 // writef("\ts = %p, imports = %p, %d\n", s, imports, imports ? imports->dim : 0); |
| 0 | 68 if (s) |
| 69 { | |
| 70 //printf("\ts = '%s.%s'\n",toChars(),s.toChars()); | |
| 71 } | |
| 72 else if (imports) | |
| 73 { | |
| 74 OverloadSet a = null; | |
| 75 | |
| 76 // Look in imported modules | |
| 77 for (int i = 0; i < imports.dim; i++) | |
| 78 { | |
| 79 ScopeDsymbol ss = cast(ScopeDsymbol)imports.data[i]; | |
| 80 Dsymbol s2; | |
| 81 | |
| 82 // If private import, don't search it | |
| 83 if (flags & 1 && prots[i] == PROT.PROTprivate) | |
| 84 continue; | |
| 85 | |
| 86 //printf("\tscanning import '%s', prots = %d, isModule = %p, isImport = %p\n", ss.toChars(), prots[i], ss.isModule(), ss.isImport()); | |
| 87 /* Don't find private members if ss is a module | |
| 88 */ | |
| 89 s2 = ss.search(loc, ident, ss.isModule() ? 1 : 0); | |
| 90 if (!s) | |
| 91 s = s2; | |
| 92 else if (s2 && s != s2) | |
| 93 { | |
| 94 if (s.toAlias() == s2.toAlias()) | |
| 95 { | |
| 96 /* After following aliases, we found the same symbol, | |
| 97 * so it's not an ambiguity. | |
| 98 * But if one alias is deprecated, prefer the other. | |
| 99 */ | |
| 100 if (s.isDeprecated()) | |
| 101 s = s2; | |
| 102 } | |
| 103 else | |
| 104 { | |
| 105 /* Two imports of the same module should be regarded as | |
| 106 * the same. | |
| 107 */ | |
| 108 Import i1 = s.isImport(); | |
| 109 Import i2 = s2.isImport(); | |
| 110 if (!(i1 && i2 && | |
| 111 (i1.mod == i2.mod || | |
| 112 (!i1.parent.isImport() && !i2.parent.isImport() && | |
| 113 i1.ident.equals(i2.ident)) | |
| 114 ) | |
| 115 ) | |
| 116 ) | |
| 117 { | |
| 118 /* If both s2 and s are overloadable (though we only | |
| 119 * need to check s once) | |
| 120 */ | |
| 121 if (s2.isOverloadable() && (a || s.isOverloadable())) | |
| 122 { if (!a) | |
| 123 a = new OverloadSet(); | |
| 124 /* Don't add to a[] if s2 is alias of previous sym | |
| 125 */ | |
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126 foreach (size_t j, Dsymbol s3; a.a) |
| 0 | 127 { |
| 128 if (s2.toAlias() == s3.toAlias()) | |
| 129 { | |
| 130 if (s3.isDeprecated()) | |
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131 a.a[j] = s2; |
| 0 | 132 goto Lcontinue; |
| 133 } | |
| 134 } | |
| 135 a.push(s2); | |
| 136 Lcontinue: | |
| 137 continue; | |
| 138 } | |
| 139 if (flags & 4) // if return null on ambiguity | |
| 140 return null; | |
| 141 if (!(flags & 2)) | |
| 142 ss.multiplyDefined(loc, s, s2); | |
| 143 break; | |
| 144 } | |
| 145 } | |
| 146 } | |
| 147 } | |
| 148 | |
| 149 /* Build special symbol if we had multiple finds | |
| 150 */ | |
| 151 if (a) | |
| 152 { | |
| 153 assert(s); | |
| 154 a.push(s); | |
| 155 s = a; | |
| 156 } | |
| 157 | |
| 158 if (s) | |
| 159 { | |
| 160 Declaration d = s.isDeclaration(); | |
| 161 if (d && d.protection == PROT.PROTprivate && !d.parent.isTemplateMixin() && !(flags & 2)) | |
| 162 error("%s is private", d.toPrettyChars()); | |
| 163 } | |
| 164 } | |
| 165 return s; | |
| 166 } | |
| 167 | |
| 168 void importScope(ScopeDsymbol s, PROT protection) | |
| 169 { | |
| 79 | 170 //writef("%s.ScopeDsymbol.importScope(%s, %d)\n", toChars(), s.toChars(), protection); |
| 0 | 171 |
| 172 // No circular or redundant import's | |
| 79 | 173 if (s !is this) |
| 0 | 174 { |
| 175 if (!imports) | |
| 176 imports = new Array(); | |
| 177 else | |
| 178 { | |
| 179 for (int i = 0; i < imports.dim; i++) | |
| 180 { | |
| 181 ScopeDsymbol ss = cast(ScopeDsymbol)imports.data[i]; | |
| 182 if (ss is s) // if already imported | |
| 183 { | |
| 184 if (protection > prots[i]) | |
| 185 prots[i] = protection; // upgrade access | |
| 186 return; | |
| 187 } | |
| 188 } | |
| 189 } | |
| 190 imports.push(cast(void*)s); | |
| 2 | 191 prots = cast(PROT*)GC.realloc(prots, imports.dim * prots[0].sizeof); |
| 0 | 192 prots[imports.dim - 1] = protection; |
| 193 } | |
| 194 } | |
| 195 | |
| 72 | 196 override int isforwardRef() |
| 0 | 197 { |
| 79 | 198 return (members is null); |
| 0 | 199 } |
| 200 | |
| 72 | 201 override void defineRef(Dsymbol s) |
| 0 | 202 { |
| 79 | 203 ScopeDsymbol ss = s.isScopeDsymbol(); |
| 204 members = ss.members; | |
| 205 ss.members = null; | |
| 0 | 206 } |
| 207 | |
| 208 static void multiplyDefined(Loc loc, Dsymbol s1, Dsymbol s2) | |
| 209 { | |
| 210 static if (false) { | |
| 211 printf("ScopeDsymbol::multiplyDefined()\n"); | |
| 212 printf("s1 = %p, '%s' kind = '%s', parent = %s\n", s1, s1.toChars(), s1.kind(), s1.parent ? s1.parent.toChars() : ""); | |
| 213 printf("s2 = %p, '%s' kind = '%s', parent = %s\n", s2, s2.toChars(), s2.kind(), s2.parent ? s2.parent.toChars() : ""); | |
| 214 } | |
| 215 if (loc.filename) | |
| 216 { | |
| 217 .error(loc, "%s at %s conflicts with %s at %s", | |
| 218 s1.toPrettyChars(), | |
| 219 s1.locToChars(), | |
| 220 s2.toPrettyChars(), | |
| 221 s2.locToChars()); | |
| 222 } | |
| 223 else | |
| 224 { | |
| 225 s1.error(loc, "conflicts with %s %s at %s", s2.kind(), s2.toPrettyChars(), s2.locToChars()); | |
| 226 } | |
| 227 } | |
| 228 | |
| 229 Dsymbol nameCollision(Dsymbol s) | |
| 230 { | |
| 231 assert(false); | |
| 232 } | |
| 233 | |
| 72 | 234 override string kind() |
| 0 | 235 { |
| 236 assert(false); | |
| 237 } | |
| 238 | |
| 79 | 239 version(DMDV2) |
| 240 { | |
| 0 | 241 /******************************************* |
| 242 * Look for member of the form: | |
| 243 * const(MemberInfo)[] getMembers(string); | |
| 244 * Returns NULL if not found | |
| 245 */ | |
| 246 FuncDeclaration findGetMembers() | |
| 247 { | |
| 248 Dsymbol s = search_function(this, Id.getmembers); | |
| 249 FuncDeclaration fdx = s ? s.isFuncDeclaration() : null; | |
| 250 | |
| 251 static if (false) { // Finish | |
| 252 static __gshared TypeFunction tfgetmembers; | |
| 253 | |
| 254 if (!tfgetmembers) | |
| 255 { | |
| 256 Scope sc; | |
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257 auto arguments = new Arguments(); |
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258 auto arg = new Argument(STCin, Type.tchar.constOf().arrayOf(), null, null); |
| 0 | 259 arguments.push(arg); |
| 260 | |
| 261 Type tret = null; | |
| 262 tfgetmembers = new TypeFunction(arguments, tret, 0, LINK.LINKd); | |
| 263 tfgetmembers = cast(TypeFunction)tfgetmembers.semantic(0, &sc); | |
| 264 } | |
| 265 if (fdx) | |
| 266 fdx = fdx.overloadExactMatch(tfgetmembers); | |
| 267 } | |
| 268 if (fdx && fdx.isVirtual()) { | |
| 269 fdx = null; | |
| 270 } | |
| 271 | |
| 272 return fdx; | |
| 273 } | |
| 79 | 274 } |
| 275 | |
| 276 Dsymbol symtabInsert(Dsymbol s) | |
| 277 { | |
| 278 return symtab.insert(s); | |
| 279 } | |
| 0 | 280 |
| 281 void emitMemberComments(Scope sc) | |
| 282 { | |
| 283 assert(false); | |
| 284 } | |
| 285 | |
| 79 | 286 version(DMDV2) |
| 287 { | |
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288 static size_t dim(Dsymbols members) |
| 0 | 289 { |
| 290 assert(false); | |
| 291 } | |
| 79 | 292 |
| 293 | |
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294 static Dsymbol getNth(Dsymbols members, size_t nth, size_t* pn = null) |
| 0 | 295 { |
| 296 assert(false); | |
| 297 } | |
| 79 | 298 } |
| 72 | 299 override ScopeDsymbol isScopeDsymbol() { return this; } |
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300 } |