Mercurial > projects > ddmd
annotate dmd/Scope.d @ 21:26b9f97f6162
Added in some = new OutBuffer();'s to be on the safe side, been getting some issues with null OutBuffers.
| author | Robert Clipsham <robert@octarineparrot.com> |
|---|---|
| date | Wed, 07 Apr 2010 00:51:29 +0100 |
| parents | 10317f0c89a5 |
| children | 460959608115 |
| rev | line source |
|---|---|
| 0 | 1 module dmd.Scope; |
| 2 | |
| 3 import dmd.Module; | |
| 4 import dmd.ScopeDsymbol; | |
| 5 import dmd.FuncDeclaration; | |
| 6 import dmd.Id; | |
| 7 import dmd.Dsymbol; | |
| 8 import dmd.LabelStatement; | |
| 9 import dmd.SwitchStatement; | |
| 10 import dmd.TryFinallyStatement; | |
| 11 import dmd.TemplateInstance; | |
| 12 import dmd.Statement; | |
| 13 import dmd.ForeachStatement; | |
| 14 import dmd.LINK; | |
| 15 import dmd.PROT; | |
| 16 import dmd.STC; | |
| 17 import dmd.AnonymousAggregateDeclaration; | |
| 18 import dmd.AggregateDeclaration; | |
| 19 import dmd.ClassDeclaration; | |
| 20 import dmd.Identifier; | |
| 21 import dmd.Loc; | |
| 22 import dmd.OutBuffer; | |
| 23 import dmd.DocComment; | |
| 24 import dmd.DsymbolTable; | |
| 25 import dmd.Global; | |
| 26 import dmd.CSX; | |
| 27 import dmd.Util; | |
| 28 | |
| 29 enum SCOPE | |
| 30 { | |
| 31 SCOPEctor = 1, // constructor type | |
| 32 SCOPEstaticif = 2, // inside static if | |
| 33 SCOPEfree = 4, // is on free list | |
| 34 } | |
| 35 | |
| 36 class Scope | |
| 37 { | |
| 38 Scope enclosing; // enclosing Scope | |
| 39 | |
| 40 Module module_; // Root module | |
| 41 ScopeDsymbol scopesym; // current symbol | |
| 42 ScopeDsymbol sd; // if in static if, and declaring new symbols, | |
| 43 // sd gets the addMember() | |
| 44 FuncDeclaration func; // function we are in | |
| 45 Dsymbol parent; // parent to use | |
| 46 LabelStatement slabel; // enclosing labelled statement | |
| 47 SwitchStatement sw; // enclosing switch statement | |
| 48 TryFinallyStatement tf; // enclosing try finally statement | |
| 49 TemplateInstance tinst; // enclosing template instance | |
| 50 Statement sbreak; // enclosing statement that supports "break" | |
| 51 Statement scontinue; // enclosing statement that supports "continue" | |
| 52 ForeachStatement fes; // if nested function for ForeachStatement, this is it | |
| 53 uint offset; // next offset to use in aggregate | |
| 54 int inunion; // we're processing members of a union | |
| 55 int incontract; // we're inside contract code | |
| 56 int nofree; // set if shouldn't free it | |
| 57 int noctor; // set if constructor calls aren't allowed | |
| 58 int intypeof; // in typeof(exp) | |
| 59 int parameterSpecialization; // if in template parameter specialization | |
| 60 int noaccesscheck; // don't do access checks | |
| 61 int mustsemantic; // cannot defer semantic() | |
| 62 | |
| 63 uint callSuper; // primitive flow analysis for constructors | |
| 64 ///#define CSXthis_ctor 1 // called this() | |
| 65 ///#define CSXsuper_ctor 2 // called super() | |
| 66 ///#define CSXthis 4 // referenced this | |
| 67 ///#define CSXsuper 8 // referenced super | |
| 68 ///#define CSXlabel 0x10 // seen a label | |
| 69 ///#define CSXreturn 0x20 // seen a return statement | |
| 70 ///#define CSXany_ctor 0x40 // either this() or super() was called | |
| 71 | |
| 72 uint structalign; // alignment for struct members | |
| 73 LINK linkage = LINK.LINKd; // linkage for external functions | |
| 74 | |
| 75 PROT protection = PROT.PROTpublic; // protection for class members | |
| 76 int explicitProtection; // set if in an explicit protection attribute | |
| 77 | |
| 78 STC stc; // storage class | |
| 79 | |
| 80 SCOPE flags; | |
| 81 | |
| 82 AnonymousAggregateDeclaration anonAgg; // for temporary analysis | |
| 83 | |
| 84 DocComment lastdc; // documentation comment for last symbol at this scope | |
| 85 uint lastoffset; // offset in docbuf of where to insert next dec | |
| 86 OutBuffer docbuf; // buffer for documentation output | |
| 87 | |
| 88 static Scope freelist; | |
| 89 /// static void *operator new(size_t sz); | |
| 90 static Scope createGlobal(Module module_) | |
| 91 { | |
| 92 Scope sc = new Scope(); | |
| 93 sc.module_ = module_; | |
| 94 sc.scopesym = new ScopeDsymbol(); | |
| 95 sc.scopesym.symtab = new DsymbolTable(); | |
| 96 | |
| 97 // Add top level package as member of this global scope | |
| 98 Dsymbol m = module_; | |
| 99 while (m.parent !is null) | |
| 100 m = m.parent; | |
| 101 | |
| 102 m.addMember(null, sc.scopesym, 1); | |
| 103 m.parent = null; // got changed by addMember() | |
| 104 | |
| 105 // Create the module scope underneath the global scope | |
| 106 sc = sc.push(module_); | |
| 107 sc.parent = module_; | |
| 108 return sc; | |
| 109 } | |
| 110 | |
| 111 this() | |
| 112 { | |
| 113 // Create root scope | |
| 114 | |
| 115 //printf("Scope.Scope() %p\n", this); | |
|
21
26b9f97f6162
Added in some = new OutBuffer();'s to be on the safe side, been getting some issues with null OutBuffers.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
116 this.docbuf = new OutBuffer; |
| 0 | 117 this.structalign = global.structalign; |
| 118 } | |
| 119 | |
| 120 this(Module module_) | |
| 121 { | |
| 122 assert(false); | |
|
21
26b9f97f6162
Added in some = new OutBuffer();'s to be on the safe side, been getting some issues with null OutBuffers.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
123 this.docbuf = new OutBuffer; |
| 0 | 124 } |
| 125 | |
| 126 this(Scope enclosing) | |
| 127 { | |
| 128 //printf("Scope.Scope(enclosing = %p) %p\n", enclosing, this); | |
| 129 assert(!(enclosing.flags & SCOPE.SCOPEfree)); | |
| 130 this.module_ = enclosing.module_; | |
| 131 this.func = enclosing.func; | |
| 132 this.parent = enclosing.parent; | |
| 133 this.sw = enclosing.sw; | |
| 134 this.tf = enclosing.tf; | |
| 135 this.tinst = enclosing.tinst; | |
| 136 this.sbreak = enclosing.sbreak; | |
| 137 this.scontinue = enclosing.scontinue; | |
| 138 this.fes = enclosing.fes; | |
| 139 this.structalign = enclosing.structalign; | |
| 140 this.enclosing = enclosing; | |
| 141 debug { | |
| 142 if (enclosing.enclosing) | |
| 143 assert(!(enclosing.enclosing.flags & SCOPE.SCOPEfree)); | |
| 144 | |
| 145 if (this is enclosing.enclosing) /// huh? | |
| 146 { | |
| 147 writef("this = %p, enclosing = %p, enclosing.enclosing = %p\n", this, enclosing, enclosing.enclosing); | |
| 148 } | |
| 149 assert(this !is enclosing.enclosing); | |
| 150 } | |
| 151 this.linkage = enclosing.linkage; | |
| 152 this.protection = enclosing.protection; | |
| 153 this.explicitProtection = enclosing.explicitProtection; | |
| 154 this.stc = enclosing.stc; | |
| 155 this.inunion = enclosing.inunion; | |
| 156 this.incontract = enclosing.incontract; | |
| 157 this.noctor = enclosing.noctor; | |
| 158 this.noaccesscheck = enclosing.noaccesscheck; | |
| 159 this.mustsemantic = enclosing.mustsemantic; | |
| 160 this.intypeof = enclosing.intypeof; | |
| 161 this.parameterSpecialization = enclosing.parameterSpecialization; | |
| 162 this.callSuper = enclosing.callSuper; | |
| 163 this.docbuf = enclosing.docbuf; | |
| 164 assert(this !is enclosing); /// huh? | |
| 165 } | |
| 166 | |
| 167 Scope push() | |
| 168 { | |
| 169 //printf("Scope.push()\n"); | |
| 170 Scope s = new Scope(this); | |
| 171 assert(this !is s); /// huh? | |
| 172 return s; | |
| 173 } | |
| 174 | |
| 175 Scope push(ScopeDsymbol ss) | |
| 176 { | |
| 177 //printf("Scope.push(%s)\n", ss.toChars()); | |
| 178 Scope s = push(); | |
| 179 s.scopesym = ss; | |
| 180 return s; | |
| 181 } | |
| 182 | |
| 183 Scope pop() | |
| 184 { | |
| 185 //printf("Scope.pop() %p nofree = %d\n", this, nofree); | |
| 186 Scope enc = enclosing; | |
| 187 | |
| 188 if (enclosing) | |
| 189 enclosing.callSuper |= callSuper; | |
| 190 | |
| 191 if (!nofree) | |
| 192 { | |
| 193 enclosing = freelist; | |
| 194 freelist = this; | |
| 195 flags |= SCOPE.SCOPEfree; | |
| 196 } | |
| 197 | |
| 198 return enc; | |
| 199 } | |
| 200 | |
| 201 void mergeCallSuper(Loc loc, uint cs) | |
| 202 { | |
| 203 // This does a primitive flow analysis to support the restrictions | |
| 204 // regarding when and how constructors can appear. | |
| 205 // It merges the results of two paths. | |
| 206 // The two paths are callSuper and cs; the result is merged into callSuper. | |
| 207 | |
| 208 if (cs != callSuper) | |
| 209 { | |
| 210 int a; | |
| 211 int b; | |
| 212 | |
| 213 callSuper |= cs & (CSX.CSXany_ctor | CSX.CSXlabel); | |
| 214 if (cs & CSX.CSXreturn) | |
| 215 { | |
| 216 ; | |
| 217 } | |
| 218 else if (callSuper & CSX.CSXreturn) | |
| 219 { | |
| 220 callSuper = cs | (callSuper & (CSX.CSXany_ctor | CSX.CSXlabel)); | |
| 221 } | |
| 222 else | |
| 223 { | |
| 224 a = (cs & (CSX.CSXthis_ctor | CSX.CSXsuper_ctor)) != 0; | |
| 225 b = (callSuper & (CSX.CSXthis_ctor | CSX.CSXsuper_ctor)) != 0; | |
| 226 | |
| 227 if (a != b) | |
| 228 error(loc, "one path skips constructor"); | |
| 229 callSuper |= cs; | |
| 230 } | |
| 231 } | |
| 232 } | |
| 233 | |
| 234 Dsymbol search(Loc loc, Identifier ident, Dsymbol* pscopesym) | |
| 235 { | |
| 236 Dsymbol s; | |
| 237 Scope sc; | |
| 238 | |
| 239 //printf("Scope.search(%p, '%s')\n", this, ident.toChars()); | |
| 240 if (ident is Id.empty) | |
| 241 { | |
| 242 // Look for module scope | |
| 243 for (sc = this; sc; sc = sc.enclosing) | |
| 244 { | |
| 245 assert(sc != sc.enclosing); | |
| 246 if (sc.scopesym) | |
| 247 { | |
| 248 s = sc.scopesym.isModule(); | |
| 249 if (s) | |
| 250 { | |
| 251 //printf("\tfound %s.%s\n", s.parent ? s.parent.toChars() : "", s.toChars()); | |
| 252 if (pscopesym) | |
| 253 *pscopesym = sc.scopesym; | |
| 254 return s; | |
| 255 } | |
| 256 } | |
| 257 } | |
| 258 return null; | |
| 259 } | |
| 260 | |
| 261 for (sc = this; sc; sc = sc.enclosing) | |
| 262 { | |
| 263 assert(sc != sc.enclosing); | |
| 264 if (sc.scopesym) | |
| 265 { | |
| 266 //printf("\tlooking in scopesym '%s', kind = '%s'\n", sc.scopesym.toChars(), sc.scopesym.kind()); | |
| 267 s = sc.scopesym.search(loc, ident, 0); | |
| 268 if (s) | |
| 269 { | |
| 270 if ((global.params.warnings || | |
| 271 global.params.Dversion > 1) && | |
| 272 ident == Id.length && | |
| 273 sc.scopesym.isArrayScopeSymbol() && | |
| 274 sc.enclosing && | |
| 275 sc.enclosing.search(loc, ident, null)) | |
| 276 { | |
| 277 warning(s.loc, "array 'length' hides other 'length' name in outer scope"); | |
| 278 } | |
| 279 | |
| 280 //printf("\tfound %s.%s, kind = '%s'\n", s.parent ? s.parent.toChars() : "", s.toChars(), s.kind()); | |
| 281 if (pscopesym) | |
| 282 *pscopesym = sc.scopesym; | |
| 283 return s; | |
| 284 } | |
| 285 } | |
| 286 } | |
| 287 | |
| 288 return null; | |
| 289 } | |
| 290 | |
| 291 Dsymbol insert(Dsymbol s) | |
| 292 { | |
| 293 for (Scope sc = this; sc; sc = sc.enclosing) | |
| 294 { | |
| 295 //printf("\tsc = %p\n", sc); | |
| 296 if (sc.scopesym) | |
| 297 { | |
| 298 //printf("\t\tsc.scopesym = %p\n", sc.scopesym); | |
| 299 if (!sc.scopesym.symtab) | |
| 300 sc.scopesym.symtab = new DsymbolTable(); | |
| 301 | |
| 302 return sc.scopesym.symtab.insert(s); | |
| 303 } | |
| 304 } | |
| 305 | |
| 306 assert(false); | |
| 307 } | |
| 308 | |
| 309 ClassDeclaration getClassScope() | |
| 310 { | |
| 311 assert(false); | |
| 312 } | |
| 313 | |
| 314 /******************************************** | |
| 315 * Search enclosing scopes for ClassDeclaration. | |
| 316 */ | |
| 317 AggregateDeclaration getStructClassScope() | |
| 318 { | |
| 319 for (Scope sc = this; sc; sc = sc.enclosing) | |
| 320 { | |
| 321 AggregateDeclaration ad; | |
| 322 | |
| 323 if (sc.scopesym) | |
| 324 { | |
| 325 ad = sc.scopesym.isClassDeclaration(); | |
| 326 if (ad) | |
| 327 return ad; | |
| 328 else | |
| 329 { | |
| 330 ad = sc.scopesym.isStructDeclaration(); | |
| 331 if (ad) | |
| 332 return ad; | |
| 333 } | |
| 334 } | |
| 335 } | |
| 336 | |
| 337 return null; | |
| 338 } | |
| 339 | |
| 340 void setNoFree() | |
| 341 { | |
| 342 //int i = 0; | |
| 343 | |
| 344 //printf("Scope.setNoFree(this = %p)\n", this); | |
| 345 for (Scope sc = this; sc; sc = sc.enclosing) | |
| 346 { | |
| 347 //printf("\tsc = %p\n", sc); | |
| 348 sc.nofree = 1; | |
| 349 | |
| 350 assert(!(flags & SCOPE.SCOPEfree)); | |
| 351 //assert(sc != sc.enclosing); | |
| 352 //assert(!sc.enclosing || sc != sc.enclosing.enclosing); | |
| 353 //if (++i == 10) | |
| 354 //assert(0); | |
| 355 } | |
| 356 } | |
|
21
26b9f97f6162
Added in some = new OutBuffer();'s to be on the safe side, been getting some issues with null OutBuffers.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
357 } |