Decl.cpp revision 62d9f110b83dfa5dcd4a945e3b5f2e9c73d3aa4a
1//===--- Decl.cpp - Declaration AST Node Implementation -------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the Decl subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/AST/Decl.h" 15#include "clang/AST/DeclCXX.h" 16#include "clang/AST/DeclObjC.h" 17#include "clang/AST/DeclTemplate.h" 18#include "clang/AST/ASTContext.h" 19#include "clang/AST/TypeLoc.h" 20#include "clang/AST/Stmt.h" 21#include "clang/AST/Expr.h" 22#include "clang/AST/ExprCXX.h" 23#include "clang/AST/PrettyPrinter.h" 24#include "clang/AST/ASTMutationListener.h" 25#include "clang/Basic/Builtins.h" 26#include "clang/Basic/IdentifierTable.h" 27#include "clang/Basic/Module.h" 28#include "clang/Basic/Specifiers.h" 29#include "clang/Basic/TargetInfo.h" 30#include "llvm/Support/ErrorHandling.h" 31 32#include <algorithm> 33 34using namespace clang; 35 36//===----------------------------------------------------------------------===// 37// NamedDecl Implementation 38//===----------------------------------------------------------------------===// 39 40static llvm::Optional<Visibility> getVisibilityOf(const Decl *D) { 41 // If this declaration has an explicit visibility attribute, use it. 42 if (const VisibilityAttr *A = D->getAttr<VisibilityAttr>()) { 43 switch (A->getVisibility()) { 44 case VisibilityAttr::Default: 45 return DefaultVisibility; 46 case VisibilityAttr::Hidden: 47 return HiddenVisibility; 48 case VisibilityAttr::Protected: 49 return ProtectedVisibility; 50 } 51 } 52 53 // If we're on Mac OS X, an 'availability' for Mac OS X attribute 54 // implies visibility(default). 55 if (D->getASTContext().getTargetInfo().getTriple().isOSDarwin()) { 56 for (specific_attr_iterator<AvailabilityAttr> 57 A = D->specific_attr_begin<AvailabilityAttr>(), 58 AEnd = D->specific_attr_end<AvailabilityAttr>(); 59 A != AEnd; ++A) 60 if ((*A)->getPlatform()->getName().equals("macosx")) 61 return DefaultVisibility; 62 } 63 64 return llvm::Optional<Visibility>(); 65} 66 67typedef NamedDecl::LinkageInfo LinkageInfo; 68 69namespace { 70/// Flags controlling the computation of linkage and visibility. 71struct LVFlags { 72 bool ConsiderGlobalVisibility; 73 bool ConsiderVisibilityAttributes; 74 bool ConsiderTemplateParameterTypes; 75 76 LVFlags() : ConsiderGlobalVisibility(true), 77 ConsiderVisibilityAttributes(true), 78 ConsiderTemplateParameterTypes(true) { 79 } 80 81 LVFlags(bool Global, bool Attributes, bool Parameters) : 82 ConsiderGlobalVisibility(Global), 83 ConsiderVisibilityAttributes(Attributes), 84 ConsiderTemplateParameterTypes(Parameters) { 85 } 86 87 /// \brief Returns a set of flags that is only useful for computing the 88 /// linkage, not the visibility, of a declaration. 89 static LVFlags CreateOnlyDeclLinkage() { 90 return LVFlags(false, false, false); 91 } 92}; 93} // end anonymous namespace 94 95static LinkageInfo getLVForType(QualType T) { 96 std::pair<Linkage,Visibility> P = T->getLinkageAndVisibility(); 97 return LinkageInfo(P.first, P.second, T->isVisibilityExplicit()); 98} 99 100/// \brief Get the most restrictive linkage for the types in the given 101/// template parameter list. 102static LinkageInfo 103getLVForTemplateParameterList(const TemplateParameterList *Params) { 104 LinkageInfo LV(ExternalLinkage, DefaultVisibility, false); 105 for (TemplateParameterList::const_iterator P = Params->begin(), 106 PEnd = Params->end(); 107 P != PEnd; ++P) { 108 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 109 if (NTTP->isExpandedParameterPack()) { 110 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) { 111 QualType T = NTTP->getExpansionType(I); 112 if (!T->isDependentType()) 113 LV.merge(getLVForType(T)); 114 } 115 continue; 116 } 117 118 if (!NTTP->getType()->isDependentType()) { 119 LV.merge(getLVForType(NTTP->getType())); 120 continue; 121 } 122 } 123 124 if (TemplateTemplateParmDecl *TTP 125 = dyn_cast<TemplateTemplateParmDecl>(*P)) { 126 LV.merge(getLVForTemplateParameterList(TTP->getTemplateParameters())); 127 } 128 } 129 130 return LV; 131} 132 133/// getLVForDecl - Get the linkage and visibility for the given declaration. 134static LinkageInfo getLVForDecl(const NamedDecl *D, LVFlags F); 135 136/// \brief Get the most restrictive linkage for the types and 137/// declarations in the given template argument list. 138static LinkageInfo getLVForTemplateArgumentList(const TemplateArgument *Args, 139 unsigned NumArgs, 140 LVFlags &F) { 141 LinkageInfo LV(ExternalLinkage, DefaultVisibility, false); 142 143 for (unsigned I = 0; I != NumArgs; ++I) { 144 switch (Args[I].getKind()) { 145 case TemplateArgument::Null: 146 case TemplateArgument::Integral: 147 case TemplateArgument::Expression: 148 break; 149 150 case TemplateArgument::Type: 151 LV.merge(getLVForType(Args[I].getAsType())); 152 break; 153 154 case TemplateArgument::Declaration: 155 // The decl can validly be null as the representation of nullptr 156 // arguments, valid only in C++0x. 157 if (Decl *D = Args[I].getAsDecl()) { 158 if (NamedDecl *ND = dyn_cast<NamedDecl>(D)) 159 LV = merge(LV, getLVForDecl(ND, F)); 160 } 161 break; 162 163 case TemplateArgument::Template: 164 case TemplateArgument::TemplateExpansion: 165 if (TemplateDecl *Template 166 = Args[I].getAsTemplateOrTemplatePattern().getAsTemplateDecl()) 167 LV.merge(getLVForDecl(Template, F)); 168 break; 169 170 case TemplateArgument::Pack: 171 LV.mergeWithMin(getLVForTemplateArgumentList(Args[I].pack_begin(), 172 Args[I].pack_size(), 173 F)); 174 break; 175 } 176 } 177 178 return LV; 179} 180 181static LinkageInfo 182getLVForTemplateArgumentList(const TemplateArgumentList &TArgs, 183 LVFlags &F) { 184 return getLVForTemplateArgumentList(TArgs.data(), TArgs.size(), F); 185} 186 187static bool shouldConsiderTemplateLV(const FunctionDecl *fn, 188 const FunctionTemplateSpecializationInfo *spec) { 189 return !(spec->isExplicitSpecialization() && 190 fn->hasAttr<VisibilityAttr>()); 191} 192 193static bool shouldConsiderTemplateLV(const ClassTemplateSpecializationDecl *d) { 194 return !(d->isExplicitSpecialization() && d->hasAttr<VisibilityAttr>()); 195} 196 197static LinkageInfo getLVForNamespaceScopeDecl(const NamedDecl *D, LVFlags F) { 198 assert(D->getDeclContext()->getRedeclContext()->isFileContext() && 199 "Not a name having namespace scope"); 200 ASTContext &Context = D->getASTContext(); 201 202 // C++ [basic.link]p3: 203 // A name having namespace scope (3.3.6) has internal linkage if it 204 // is the name of 205 // - an object, reference, function or function template that is 206 // explicitly declared static; or, 207 // (This bullet corresponds to C99 6.2.2p3.) 208 if (const VarDecl *Var = dyn_cast<VarDecl>(D)) { 209 // Explicitly declared static. 210 if (Var->getStorageClass() == SC_Static) 211 return LinkageInfo::internal(); 212 213 // - an object or reference that is explicitly declared const 214 // and neither explicitly declared extern nor previously 215 // declared to have external linkage; or 216 // (there is no equivalent in C99) 217 if (Context.getLangOpts().CPlusPlus && 218 Var->getType().isConstant(Context) && 219 Var->getStorageClass() != SC_Extern && 220 Var->getStorageClass() != SC_PrivateExtern) { 221 bool FoundExtern = false; 222 for (const VarDecl *PrevVar = Var->getPreviousDecl(); 223 PrevVar && !FoundExtern; 224 PrevVar = PrevVar->getPreviousDecl()) 225 if (isExternalLinkage(PrevVar->getLinkage())) 226 FoundExtern = true; 227 228 if (!FoundExtern) 229 return LinkageInfo::internal(); 230 } 231 if (Var->getStorageClass() == SC_None) { 232 const VarDecl *PrevVar = Var->getPreviousDecl(); 233 for (; PrevVar; PrevVar = PrevVar->getPreviousDecl()) 234 if (PrevVar->getStorageClass() == SC_PrivateExtern) 235 break; 236 if (PrevVar) 237 return PrevVar->getLinkageAndVisibility(); 238 } 239 } else if (isa<FunctionDecl>(D) || isa<FunctionTemplateDecl>(D)) { 240 // C++ [temp]p4: 241 // A non-member function template can have internal linkage; any 242 // other template name shall have external linkage. 243 const FunctionDecl *Function = 0; 244 if (const FunctionTemplateDecl *FunTmpl 245 = dyn_cast<FunctionTemplateDecl>(D)) 246 Function = FunTmpl->getTemplatedDecl(); 247 else 248 Function = cast<FunctionDecl>(D); 249 250 // Explicitly declared static. 251 if (Function->getStorageClass() == SC_Static) 252 return LinkageInfo(InternalLinkage, DefaultVisibility, false); 253 } else if (const FieldDecl *Field = dyn_cast<FieldDecl>(D)) { 254 // - a data member of an anonymous union. 255 if (cast<RecordDecl>(Field->getDeclContext())->isAnonymousStructOrUnion()) 256 return LinkageInfo::internal(); 257 } 258 259 if (D->isInAnonymousNamespace()) { 260 const VarDecl *Var = dyn_cast<VarDecl>(D); 261 const FunctionDecl *Func = dyn_cast<FunctionDecl>(D); 262 if ((!Var || !Var->getDeclContext()->isExternCContext()) && 263 (!Func || !Func->getDeclContext()->isExternCContext())) 264 return LinkageInfo::uniqueExternal(); 265 } 266 267 // Set up the defaults. 268 269 // C99 6.2.2p5: 270 // If the declaration of an identifier for an object has file 271 // scope and no storage-class specifier, its linkage is 272 // external. 273 LinkageInfo LV; 274 LV.mergeVisibility(Context.getLangOpts().getVisibilityMode()); 275 276 // C++ [basic.link]p4: 277 278 // A name having namespace scope has external linkage if it is the 279 // name of 280 // 281 // - an object or reference, unless it has internal linkage; or 282 if (const VarDecl *Var = dyn_cast<VarDecl>(D)) { 283 // GCC applies the following optimization to variables and static 284 // data members, but not to functions: 285 // 286 // Modify the variable's LV by the LV of its type unless this is 287 // C or extern "C". This follows from [basic.link]p9: 288 // A type without linkage shall not be used as the type of a 289 // variable or function with external linkage unless 290 // - the entity has C language linkage, or 291 // - the entity is declared within an unnamed namespace, or 292 // - the entity is not used or is defined in the same 293 // translation unit. 294 // and [basic.link]p10: 295 // ...the types specified by all declarations referring to a 296 // given variable or function shall be identical... 297 // C does not have an equivalent rule. 298 // 299 // Ignore this if we've got an explicit attribute; the user 300 // probably knows what they're doing. 301 // 302 // Note that we don't want to make the variable non-external 303 // because of this, but unique-external linkage suits us. 304 if (Context.getLangOpts().CPlusPlus && 305 !Var->getDeclContext()->isExternCContext()) { 306 LinkageInfo TypeLV = getLVForType(Var->getType()); 307 if (TypeLV.linkage() != ExternalLinkage) 308 return LinkageInfo::uniqueExternal(); 309 LV.mergeVisibilityWithMin(TypeLV.visibility(), 310 TypeLV.visibilityExplicit()); 311 } 312 313 if (Var->getStorageClass() == SC_PrivateExtern) 314 LV.setVisibility(HiddenVisibility, true); 315 316 if (!Context.getLangOpts().CPlusPlus && 317 (Var->getStorageClass() == SC_Extern || 318 Var->getStorageClass() == SC_PrivateExtern)) { 319 320 // C99 6.2.2p4: 321 // For an identifier declared with the storage-class specifier 322 // extern in a scope in which a prior declaration of that 323 // identifier is visible, if the prior declaration specifies 324 // internal or external linkage, the linkage of the identifier 325 // at the later declaration is the same as the linkage 326 // specified at the prior declaration. If no prior declaration 327 // is visible, or if the prior declaration specifies no 328 // linkage, then the identifier has external linkage. 329 if (const VarDecl *PrevVar = Var->getPreviousDecl()) { 330 LinkageInfo PrevLV = getLVForDecl(PrevVar, F); 331 if (PrevLV.linkage()) LV.setLinkage(PrevLV.linkage()); 332 LV.mergeVisibility(PrevLV); 333 } 334 } 335 336 // - a function, unless it has internal linkage; or 337 } else if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { 338 // In theory, we can modify the function's LV by the LV of its 339 // type unless it has C linkage (see comment above about variables 340 // for justification). In practice, GCC doesn't do this, so it's 341 // just too painful to make work. 342 343 if (Function->getStorageClass() == SC_PrivateExtern) 344 LV.setVisibility(HiddenVisibility, true); 345 346 // C99 6.2.2p5: 347 // If the declaration of an identifier for a function has no 348 // storage-class specifier, its linkage is determined exactly 349 // as if it were declared with the storage-class specifier 350 // extern. 351 if (!Context.getLangOpts().CPlusPlus && 352 (Function->getStorageClass() == SC_Extern || 353 Function->getStorageClass() == SC_PrivateExtern || 354 Function->getStorageClass() == SC_None)) { 355 // C99 6.2.2p4: 356 // For an identifier declared with the storage-class specifier 357 // extern in a scope in which a prior declaration of that 358 // identifier is visible, if the prior declaration specifies 359 // internal or external linkage, the linkage of the identifier 360 // at the later declaration is the same as the linkage 361 // specified at the prior declaration. If no prior declaration 362 // is visible, or if the prior declaration specifies no 363 // linkage, then the identifier has external linkage. 364 if (const FunctionDecl *PrevFunc = Function->getPreviousDecl()) { 365 LinkageInfo PrevLV = getLVForDecl(PrevFunc, F); 366 if (PrevLV.linkage()) LV.setLinkage(PrevLV.linkage()); 367 LV.mergeVisibility(PrevLV); 368 } 369 } 370 371 // In C++, then if the type of the function uses a type with 372 // unique-external linkage, it's not legally usable from outside 373 // this translation unit. However, we should use the C linkage 374 // rules instead for extern "C" declarations. 375 if (Context.getLangOpts().CPlusPlus && 376 !Function->getDeclContext()->isExternCContext() && 377 Function->getType()->getLinkage() == UniqueExternalLinkage) 378 return LinkageInfo::uniqueExternal(); 379 380 // Consider LV from the template and the template arguments unless 381 // this is an explicit specialization with a visibility attribute. 382 if (FunctionTemplateSpecializationInfo *specInfo 383 = Function->getTemplateSpecializationInfo()) { 384 if (shouldConsiderTemplateLV(Function, specInfo)) { 385 LV.merge(getLVForDecl(specInfo->getTemplate(), 386 LVFlags::CreateOnlyDeclLinkage())); 387 const TemplateArgumentList &templateArgs = *specInfo->TemplateArguments; 388 LV.mergeWithMin(getLVForTemplateArgumentList(templateArgs, F)); 389 } 390 } 391 392 // - a named class (Clause 9), or an unnamed class defined in a 393 // typedef declaration in which the class has the typedef name 394 // for linkage purposes (7.1.3); or 395 // - a named enumeration (7.2), or an unnamed enumeration 396 // defined in a typedef declaration in which the enumeration 397 // has the typedef name for linkage purposes (7.1.3); or 398 } else if (const TagDecl *Tag = dyn_cast<TagDecl>(D)) { 399 // Unnamed tags have no linkage. 400 if (!Tag->getDeclName() && !Tag->getTypedefNameForAnonDecl()) 401 return LinkageInfo::none(); 402 403 // If this is a class template specialization, consider the 404 // linkage of the template and template arguments. 405 if (const ClassTemplateSpecializationDecl *spec 406 = dyn_cast<ClassTemplateSpecializationDecl>(Tag)) { 407 if (shouldConsiderTemplateLV(spec)) { 408 // From the template. 409 LV.merge(getLVForDecl(spec->getSpecializedTemplate(), 410 LVFlags::CreateOnlyDeclLinkage())); 411 412 // The arguments at which the template was instantiated. 413 const TemplateArgumentList &TemplateArgs = spec->getTemplateArgs(); 414 LV.mergeWithMin(getLVForTemplateArgumentList(TemplateArgs, F)); 415 } 416 } 417 418 // Consider -fvisibility unless the type has C linkage. 419 if (F.ConsiderGlobalVisibility) 420 F.ConsiderGlobalVisibility = 421 (Context.getLangOpts().CPlusPlus && 422 !Tag->getDeclContext()->isExternCContext()); 423 424 // - an enumerator belonging to an enumeration with external linkage; 425 } else if (isa<EnumConstantDecl>(D)) { 426 LinkageInfo EnumLV = getLVForDecl(cast<NamedDecl>(D->getDeclContext()), F); 427 if (!isExternalLinkage(EnumLV.linkage())) 428 return LinkageInfo::none(); 429 LV.merge(EnumLV); 430 431 // - a template, unless it is a function template that has 432 // internal linkage (Clause 14); 433 } else if (const TemplateDecl *temp = dyn_cast<TemplateDecl>(D)) { 434 if (F.ConsiderTemplateParameterTypes) 435 LV.merge(getLVForTemplateParameterList(temp->getTemplateParameters())); 436 437 // - a namespace (7.3), unless it is declared within an unnamed 438 // namespace. 439 } else if (isa<NamespaceDecl>(D) && !D->isInAnonymousNamespace()) { 440 return LV; 441 442 // By extension, we assign external linkage to Objective-C 443 // interfaces. 444 } else if (isa<ObjCInterfaceDecl>(D)) { 445 // fallout 446 447 // Everything not covered here has no linkage. 448 } else { 449 return LinkageInfo::none(); 450 } 451 452 if (F.ConsiderVisibilityAttributes) { 453 if (llvm::Optional<Visibility> Vis = D->getExplicitVisibility()) { 454 LV.setVisibility(*Vis, true); 455 F.ConsiderGlobalVisibility = false; 456 } else { 457 // If we're declared in a namespace with a visibility attribute, 458 // use that namespace's visibility, but don't call it explicit. 459 for (const DeclContext *DC = D->getDeclContext(); 460 !isa<TranslationUnitDecl>(DC); 461 DC = DC->getParent()) { 462 const NamespaceDecl *ND = dyn_cast<NamespaceDecl>(DC); 463 if (!ND) continue; 464 if (llvm::Optional<Visibility> Vis = ND->getExplicitVisibility()) { 465 LV.setVisibility(*Vis, true); 466 F.ConsiderGlobalVisibility = false; 467 break; 468 } 469 } 470 } 471 } 472 473 // If we ended up with non-external linkage, visibility should 474 // always be default. 475 if (LV.linkage() != ExternalLinkage) 476 return LinkageInfo(LV.linkage(), DefaultVisibility, false); 477 478 return LV; 479} 480 481static LinkageInfo getLVForClassMember(const NamedDecl *D, LVFlags F) { 482 // Only certain class members have linkage. Note that fields don't 483 // really have linkage, but it's convenient to say they do for the 484 // purposes of calculating linkage of pointer-to-data-member 485 // template arguments. 486 if (!(isa<CXXMethodDecl>(D) || 487 isa<VarDecl>(D) || 488 isa<FieldDecl>(D) || 489 (isa<TagDecl>(D) && 490 (D->getDeclName() || cast<TagDecl>(D)->getTypedefNameForAnonDecl())))) 491 return LinkageInfo::none(); 492 493 LinkageInfo LV; 494 LV.mergeVisibility(D->getASTContext().getLangOpts().getVisibilityMode()); 495 496 // The flags we're going to use to compute the class's visibility. 497 LVFlags ClassF = F; 498 499 // If we have an explicit visibility attribute, merge that in. 500 if (F.ConsiderVisibilityAttributes) { 501 if (llvm::Optional<Visibility> Vis = D->getExplicitVisibility()) { 502 LV.mergeVisibility(*Vis, true); 503 504 // Ignore global visibility later, but not this attribute. 505 F.ConsiderGlobalVisibility = false; 506 507 // Ignore both global visibility and attributes when computing our 508 // parent's visibility. 509 ClassF = LVFlags::CreateOnlyDeclLinkage(); 510 } 511 } 512 513 // Class members only have linkage if their class has external 514 // linkage. 515 LV.merge(getLVForDecl(cast<RecordDecl>(D->getDeclContext()), ClassF)); 516 if (!isExternalLinkage(LV.linkage())) 517 return LinkageInfo::none(); 518 519 // If the class already has unique-external linkage, we can't improve. 520 if (LV.linkage() == UniqueExternalLinkage) 521 return LinkageInfo::uniqueExternal(); 522 523 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { 524 // If the type of the function uses a type with unique-external 525 // linkage, it's not legally usable from outside this translation unit. 526 if (MD->getType()->getLinkage() == UniqueExternalLinkage) 527 return LinkageInfo::uniqueExternal(); 528 529 TemplateSpecializationKind TSK = TSK_Undeclared; 530 531 // If this is a method template specialization, use the linkage for 532 // the template parameters and arguments. 533 if (FunctionTemplateSpecializationInfo *spec 534 = MD->getTemplateSpecializationInfo()) { 535 if (shouldConsiderTemplateLV(MD, spec)) { 536 LV.mergeWithMin(getLVForTemplateArgumentList(*spec->TemplateArguments, 537 F)); 538 if (F.ConsiderTemplateParameterTypes) 539 LV.merge(getLVForTemplateParameterList( 540 spec->getTemplate()->getTemplateParameters())); 541 } 542 543 TSK = spec->getTemplateSpecializationKind(); 544 } else if (MemberSpecializationInfo *MSI = 545 MD->getMemberSpecializationInfo()) { 546 TSK = MSI->getTemplateSpecializationKind(); 547 } 548 549 // If we're paying attention to global visibility, apply 550 // -finline-visibility-hidden if this is an inline method. 551 // 552 // Note that ConsiderGlobalVisibility doesn't yet have information 553 // about whether containing classes have visibility attributes, 554 // and that's intentional. 555 if (TSK != TSK_ExplicitInstantiationDeclaration && 556 TSK != TSK_ExplicitInstantiationDefinition && 557 F.ConsiderGlobalVisibility && 558 MD->getASTContext().getLangOpts().InlineVisibilityHidden) { 559 // InlineVisibilityHidden only applies to definitions, and 560 // isInlined() only gives meaningful answers on definitions 561 // anyway. 562 const FunctionDecl *Def = 0; 563 if (MD->hasBody(Def) && Def->isInlined()) 564 LV.setVisibility(HiddenVisibility); 565 } 566 567 // Note that in contrast to basically every other situation, we 568 // *do* apply -fvisibility to method declarations. 569 570 } else if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D)) { 571 if (const ClassTemplateSpecializationDecl *spec 572 = dyn_cast<ClassTemplateSpecializationDecl>(RD)) { 573 if (shouldConsiderTemplateLV(spec)) { 574 // Merge template argument/parameter information for member 575 // class template specializations. 576 LV.mergeWithMin(getLVForTemplateArgumentList(spec->getTemplateArgs(), 577 F)); 578 if (F.ConsiderTemplateParameterTypes) 579 LV.merge(getLVForTemplateParameterList( 580 spec->getSpecializedTemplate()->getTemplateParameters())); 581 } 582 } 583 584 // Static data members. 585 } else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 586 // Modify the variable's linkage by its type, but ignore the 587 // type's visibility unless it's a definition. 588 LinkageInfo TypeLV = getLVForType(VD->getType()); 589 if (TypeLV.linkage() != ExternalLinkage) 590 LV.mergeLinkage(UniqueExternalLinkage); 591 if (!LV.visibilityExplicit()) 592 LV.mergeVisibility(TypeLV.visibility(), TypeLV.visibilityExplicit()); 593 } 594 595 return LV; 596} 597 598static void clearLinkageForClass(const CXXRecordDecl *record) { 599 for (CXXRecordDecl::decl_iterator 600 i = record->decls_begin(), e = record->decls_end(); i != e; ++i) { 601 Decl *child = *i; 602 if (isa<NamedDecl>(child)) 603 cast<NamedDecl>(child)->ClearLinkageCache(); 604 } 605} 606 607void NamedDecl::anchor() { } 608 609void NamedDecl::ClearLinkageCache() { 610 // Note that we can't skip clearing the linkage of children just 611 // because the parent doesn't have cached linkage: we don't cache 612 // when computing linkage for parent contexts. 613 614 HasCachedLinkage = 0; 615 616 // If we're changing the linkage of a class, we need to reset the 617 // linkage of child declarations, too. 618 if (const CXXRecordDecl *record = dyn_cast<CXXRecordDecl>(this)) 619 clearLinkageForClass(record); 620 621 if (ClassTemplateDecl *temp = 622 dyn_cast<ClassTemplateDecl>(const_cast<NamedDecl*>(this))) { 623 // Clear linkage for the template pattern. 624 CXXRecordDecl *record = temp->getTemplatedDecl(); 625 record->HasCachedLinkage = 0; 626 clearLinkageForClass(record); 627 628 // We need to clear linkage for specializations, too. 629 for (ClassTemplateDecl::spec_iterator 630 i = temp->spec_begin(), e = temp->spec_end(); i != e; ++i) 631 i->ClearLinkageCache(); 632 } 633 634 // Clear cached linkage for function template decls, too. 635 if (FunctionTemplateDecl *temp = 636 dyn_cast<FunctionTemplateDecl>(const_cast<NamedDecl*>(this))) { 637 temp->getTemplatedDecl()->ClearLinkageCache(); 638 for (FunctionTemplateDecl::spec_iterator 639 i = temp->spec_begin(), e = temp->spec_end(); i != e; ++i) 640 i->ClearLinkageCache(); 641 } 642 643} 644 645Linkage NamedDecl::getLinkage() const { 646 if (HasCachedLinkage) { 647 assert(Linkage(CachedLinkage) == 648 getLVForDecl(this, LVFlags::CreateOnlyDeclLinkage()).linkage()); 649 return Linkage(CachedLinkage); 650 } 651 652 CachedLinkage = getLVForDecl(this, 653 LVFlags::CreateOnlyDeclLinkage()).linkage(); 654 HasCachedLinkage = 1; 655 return Linkage(CachedLinkage); 656} 657 658LinkageInfo NamedDecl::getLinkageAndVisibility() const { 659 LinkageInfo LI = getLVForDecl(this, LVFlags()); 660 assert(!HasCachedLinkage || Linkage(CachedLinkage) == LI.linkage()); 661 HasCachedLinkage = 1; 662 CachedLinkage = LI.linkage(); 663 return LI; 664} 665 666llvm::Optional<Visibility> NamedDecl::getExplicitVisibility() const { 667 // Use the most recent declaration of a variable. 668 if (const VarDecl *var = dyn_cast<VarDecl>(this)) 669 return getVisibilityOf(var->getMostRecentDecl()); 670 671 // Use the most recent declaration of a function, and also handle 672 // function template specializations. 673 if (const FunctionDecl *fn = dyn_cast<FunctionDecl>(this)) { 674 if (llvm::Optional<Visibility> V 675 = getVisibilityOf(fn->getMostRecentDecl())) 676 return V; 677 678 // If the function is a specialization of a template with an 679 // explicit visibility attribute, use that. 680 if (FunctionTemplateSpecializationInfo *templateInfo 681 = fn->getTemplateSpecializationInfo()) 682 return getVisibilityOf(templateInfo->getTemplate()->getTemplatedDecl()); 683 684 // If the function is a member of a specialization of a class template 685 // and the corresponding decl has explicit visibility, use that. 686 FunctionDecl *InstantiatedFrom = fn->getInstantiatedFromMemberFunction(); 687 if (InstantiatedFrom) 688 return getVisibilityOf(InstantiatedFrom); 689 690 return llvm::Optional<Visibility>(); 691 } 692 693 // Otherwise, just check the declaration itself first. 694 if (llvm::Optional<Visibility> V = getVisibilityOf(this)) 695 return V; 696 697 // If there wasn't explicit visibility there, and this is a 698 // specialization of a class template, check for visibility 699 // on the pattern. 700 if (const ClassTemplateSpecializationDecl *spec 701 = dyn_cast<ClassTemplateSpecializationDecl>(this)) 702 return getVisibilityOf(spec->getSpecializedTemplate()->getTemplatedDecl()); 703 704 // If this is a member class of a specialization of a class template 705 // and the corresponding decl has explicit visibility, use that. 706 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(this)) { 707 CXXRecordDecl *InstantiatedFrom = RD->getInstantiatedFromMemberClass(); 708 if (InstantiatedFrom) 709 return getVisibilityOf(InstantiatedFrom); 710 } 711 712 return llvm::Optional<Visibility>(); 713} 714 715static LinkageInfo getLVForDecl(const NamedDecl *D, LVFlags Flags) { 716 // Objective-C: treat all Objective-C declarations as having external 717 // linkage. 718 switch (D->getKind()) { 719 default: 720 break; 721 case Decl::ParmVar: 722 return LinkageInfo::none(); 723 case Decl::TemplateTemplateParm: // count these as external 724 case Decl::NonTypeTemplateParm: 725 case Decl::ObjCAtDefsField: 726 case Decl::ObjCCategory: 727 case Decl::ObjCCategoryImpl: 728 case Decl::ObjCCompatibleAlias: 729 case Decl::ObjCImplementation: 730 case Decl::ObjCMethod: 731 case Decl::ObjCProperty: 732 case Decl::ObjCPropertyImpl: 733 case Decl::ObjCProtocol: 734 return LinkageInfo::external(); 735 736 case Decl::CXXRecord: { 737 const CXXRecordDecl *Record = cast<CXXRecordDecl>(D); 738 if (Record->isLambda()) { 739 if (!Record->getLambdaManglingNumber()) { 740 // This lambda has no mangling number, so it's internal. 741 return LinkageInfo::internal(); 742 } 743 744 // This lambda has its linkage/visibility determined by its owner. 745 const DeclContext *DC = D->getDeclContext()->getRedeclContext(); 746 if (Decl *ContextDecl = Record->getLambdaContextDecl()) { 747 if (isa<ParmVarDecl>(ContextDecl)) 748 DC = ContextDecl->getDeclContext()->getRedeclContext(); 749 else 750 return getLVForDecl(cast<NamedDecl>(ContextDecl), Flags); 751 } 752 753 if (const NamedDecl *ND = dyn_cast<NamedDecl>(DC)) 754 return getLVForDecl(ND, Flags); 755 756 return LinkageInfo::external(); 757 } 758 759 break; 760 } 761 } 762 763 // Handle linkage for namespace-scope names. 764 if (D->getDeclContext()->getRedeclContext()->isFileContext()) 765 return getLVForNamespaceScopeDecl(D, Flags); 766 767 // C++ [basic.link]p5: 768 // In addition, a member function, static data member, a named 769 // class or enumeration of class scope, or an unnamed class or 770 // enumeration defined in a class-scope typedef declaration such 771 // that the class or enumeration has the typedef name for linkage 772 // purposes (7.1.3), has external linkage if the name of the class 773 // has external linkage. 774 if (D->getDeclContext()->isRecord()) 775 return getLVForClassMember(D, Flags); 776 777 // C++ [basic.link]p6: 778 // The name of a function declared in block scope and the name of 779 // an object declared by a block scope extern declaration have 780 // linkage. If there is a visible declaration of an entity with 781 // linkage having the same name and type, ignoring entities 782 // declared outside the innermost enclosing namespace scope, the 783 // block scope declaration declares that same entity and receives 784 // the linkage of the previous declaration. If there is more than 785 // one such matching entity, the program is ill-formed. Otherwise, 786 // if no matching entity is found, the block scope entity receives 787 // external linkage. 788 if (D->getLexicalDeclContext()->isFunctionOrMethod()) { 789 if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { 790 if (Function->isInAnonymousNamespace() && 791 !Function->getDeclContext()->isExternCContext()) 792 return LinkageInfo::uniqueExternal(); 793 794 LinkageInfo LV; 795 if (Flags.ConsiderVisibilityAttributes) { 796 if (llvm::Optional<Visibility> Vis = Function->getExplicitVisibility()) 797 LV.setVisibility(*Vis); 798 } 799 800 if (const FunctionDecl *Prev = Function->getPreviousDecl()) { 801 LinkageInfo PrevLV = getLVForDecl(Prev, Flags); 802 if (PrevLV.linkage()) LV.setLinkage(PrevLV.linkage()); 803 LV.mergeVisibility(PrevLV); 804 } 805 806 return LV; 807 } 808 809 if (const VarDecl *Var = dyn_cast<VarDecl>(D)) 810 if (Var->getStorageClass() == SC_Extern || 811 Var->getStorageClass() == SC_PrivateExtern) { 812 if (Var->isInAnonymousNamespace() && 813 !Var->getDeclContext()->isExternCContext()) 814 return LinkageInfo::uniqueExternal(); 815 816 LinkageInfo LV; 817 if (Var->getStorageClass() == SC_PrivateExtern) 818 LV.setVisibility(HiddenVisibility); 819 else if (Flags.ConsiderVisibilityAttributes) { 820 if (llvm::Optional<Visibility> Vis = Var->getExplicitVisibility()) 821 LV.setVisibility(*Vis); 822 } 823 824 if (const VarDecl *Prev = Var->getPreviousDecl()) { 825 LinkageInfo PrevLV = getLVForDecl(Prev, Flags); 826 if (PrevLV.linkage()) LV.setLinkage(PrevLV.linkage()); 827 LV.mergeVisibility(PrevLV); 828 } 829 830 return LV; 831 } 832 } 833 834 // C++ [basic.link]p6: 835 // Names not covered by these rules have no linkage. 836 return LinkageInfo::none(); 837} 838 839std::string NamedDecl::getQualifiedNameAsString() const { 840 return getQualifiedNameAsString(getASTContext().getPrintingPolicy()); 841} 842 843std::string NamedDecl::getQualifiedNameAsString(const PrintingPolicy &P) const { 844 const DeclContext *Ctx = getDeclContext(); 845 846 if (Ctx->isFunctionOrMethod()) 847 return getNameAsString(); 848 849 typedef SmallVector<const DeclContext *, 8> ContextsTy; 850 ContextsTy Contexts; 851 852 // Collect contexts. 853 while (Ctx && isa<NamedDecl>(Ctx)) { 854 Contexts.push_back(Ctx); 855 Ctx = Ctx->getParent(); 856 }; 857 858 std::string QualName; 859 llvm::raw_string_ostream OS(QualName); 860 861 for (ContextsTy::reverse_iterator I = Contexts.rbegin(), E = Contexts.rend(); 862 I != E; ++I) { 863 if (const ClassTemplateSpecializationDecl *Spec 864 = dyn_cast<ClassTemplateSpecializationDecl>(*I)) { 865 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 866 std::string TemplateArgsStr 867 = TemplateSpecializationType::PrintTemplateArgumentList( 868 TemplateArgs.data(), 869 TemplateArgs.size(), 870 P); 871 OS << Spec->getName() << TemplateArgsStr; 872 } else if (const NamespaceDecl *ND = dyn_cast<NamespaceDecl>(*I)) { 873 if (ND->isAnonymousNamespace()) 874 OS << "<anonymous namespace>"; 875 else 876 OS << *ND; 877 } else if (const RecordDecl *RD = dyn_cast<RecordDecl>(*I)) { 878 if (!RD->getIdentifier()) 879 OS << "<anonymous " << RD->getKindName() << '>'; 880 else 881 OS << *RD; 882 } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*I)) { 883 const FunctionProtoType *FT = 0; 884 if (FD->hasWrittenPrototype()) 885 FT = dyn_cast<FunctionProtoType>(FD->getType()->getAs<FunctionType>()); 886 887 OS << *FD << '('; 888 if (FT) { 889 unsigned NumParams = FD->getNumParams(); 890 for (unsigned i = 0; i < NumParams; ++i) { 891 if (i) 892 OS << ", "; 893 std::string Param; 894 FD->getParamDecl(i)->getType().getAsStringInternal(Param, P); 895 OS << Param; 896 } 897 898 if (FT->isVariadic()) { 899 if (NumParams > 0) 900 OS << ", "; 901 OS << "..."; 902 } 903 } 904 OS << ')'; 905 } else { 906 OS << *cast<NamedDecl>(*I); 907 } 908 OS << "::"; 909 } 910 911 if (getDeclName()) 912 OS << *this; 913 else 914 OS << "<anonymous>"; 915 916 return OS.str(); 917} 918 919bool NamedDecl::declarationReplaces(NamedDecl *OldD) const { 920 assert(getDeclName() == OldD->getDeclName() && "Declaration name mismatch"); 921 922 // UsingDirectiveDecl's are not really NamedDecl's, and all have same name. 923 // We want to keep it, unless it nominates same namespace. 924 if (getKind() == Decl::UsingDirective) { 925 return cast<UsingDirectiveDecl>(this)->getNominatedNamespace() 926 ->getOriginalNamespace() == 927 cast<UsingDirectiveDecl>(OldD)->getNominatedNamespace() 928 ->getOriginalNamespace(); 929 } 930 931 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(this)) 932 // For function declarations, we keep track of redeclarations. 933 return FD->getPreviousDecl() == OldD; 934 935 // For function templates, the underlying function declarations are linked. 936 if (const FunctionTemplateDecl *FunctionTemplate 937 = dyn_cast<FunctionTemplateDecl>(this)) 938 if (const FunctionTemplateDecl *OldFunctionTemplate 939 = dyn_cast<FunctionTemplateDecl>(OldD)) 940 return FunctionTemplate->getTemplatedDecl() 941 ->declarationReplaces(OldFunctionTemplate->getTemplatedDecl()); 942 943 // For method declarations, we keep track of redeclarations. 944 if (isa<ObjCMethodDecl>(this)) 945 return false; 946 947 if (isa<ObjCInterfaceDecl>(this) && isa<ObjCCompatibleAliasDecl>(OldD)) 948 return true; 949 950 if (isa<UsingShadowDecl>(this) && isa<UsingShadowDecl>(OldD)) 951 return cast<UsingShadowDecl>(this)->getTargetDecl() == 952 cast<UsingShadowDecl>(OldD)->getTargetDecl(); 953 954 if (isa<UsingDecl>(this) && isa<UsingDecl>(OldD)) { 955 ASTContext &Context = getASTContext(); 956 return Context.getCanonicalNestedNameSpecifier( 957 cast<UsingDecl>(this)->getQualifier()) == 958 Context.getCanonicalNestedNameSpecifier( 959 cast<UsingDecl>(OldD)->getQualifier()); 960 } 961 962 // A typedef of an Objective-C class type can replace an Objective-C class 963 // declaration or definition, and vice versa. 964 if ((isa<TypedefNameDecl>(this) && isa<ObjCInterfaceDecl>(OldD)) || 965 (isa<ObjCInterfaceDecl>(this) && isa<TypedefNameDecl>(OldD))) 966 return true; 967 968 // For non-function declarations, if the declarations are of the 969 // same kind then this must be a redeclaration, or semantic analysis 970 // would not have given us the new declaration. 971 return this->getKind() == OldD->getKind(); 972} 973 974bool NamedDecl::hasLinkage() const { 975 return getLinkage() != NoLinkage; 976} 977 978NamedDecl *NamedDecl::getUnderlyingDeclImpl() { 979 NamedDecl *ND = this; 980 while (UsingShadowDecl *UD = dyn_cast<UsingShadowDecl>(ND)) 981 ND = UD->getTargetDecl(); 982 983 if (ObjCCompatibleAliasDecl *AD = dyn_cast<ObjCCompatibleAliasDecl>(ND)) 984 return AD->getClassInterface(); 985 986 return ND; 987} 988 989bool NamedDecl::isCXXInstanceMember() const { 990 if (!isCXXClassMember()) 991 return false; 992 993 const NamedDecl *D = this; 994 if (isa<UsingShadowDecl>(D)) 995 D = cast<UsingShadowDecl>(D)->getTargetDecl(); 996 997 if (isa<FieldDecl>(D) || isa<IndirectFieldDecl>(D)) 998 return true; 999 if (isa<CXXMethodDecl>(D)) 1000 return cast<CXXMethodDecl>(D)->isInstance(); 1001 if (isa<FunctionTemplateDecl>(D)) 1002 return cast<CXXMethodDecl>(cast<FunctionTemplateDecl>(D) 1003 ->getTemplatedDecl())->isInstance(); 1004 return false; 1005} 1006 1007//===----------------------------------------------------------------------===// 1008// DeclaratorDecl Implementation 1009//===----------------------------------------------------------------------===// 1010 1011template <typename DeclT> 1012static SourceLocation getTemplateOrInnerLocStart(const DeclT *decl) { 1013 if (decl->getNumTemplateParameterLists() > 0) 1014 return decl->getTemplateParameterList(0)->getTemplateLoc(); 1015 else 1016 return decl->getInnerLocStart(); 1017} 1018 1019SourceLocation DeclaratorDecl::getTypeSpecStartLoc() const { 1020 TypeSourceInfo *TSI = getTypeSourceInfo(); 1021 if (TSI) return TSI->getTypeLoc().getBeginLoc(); 1022 return SourceLocation(); 1023} 1024 1025void DeclaratorDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) { 1026 if (QualifierLoc) { 1027 // Make sure the extended decl info is allocated. 1028 if (!hasExtInfo()) { 1029 // Save (non-extended) type source info pointer. 1030 TypeSourceInfo *savedTInfo = DeclInfo.get<TypeSourceInfo*>(); 1031 // Allocate external info struct. 1032 DeclInfo = new (getASTContext()) ExtInfo; 1033 // Restore savedTInfo into (extended) decl info. 1034 getExtInfo()->TInfo = savedTInfo; 1035 } 1036 // Set qualifier info. 1037 getExtInfo()->QualifierLoc = QualifierLoc; 1038 } else { 1039 // Here Qualifier == 0, i.e., we are removing the qualifier (if any). 1040 if (hasExtInfo()) { 1041 if (getExtInfo()->NumTemplParamLists == 0) { 1042 // Save type source info pointer. 1043 TypeSourceInfo *savedTInfo = getExtInfo()->TInfo; 1044 // Deallocate the extended decl info. 1045 getASTContext().Deallocate(getExtInfo()); 1046 // Restore savedTInfo into (non-extended) decl info. 1047 DeclInfo = savedTInfo; 1048 } 1049 else 1050 getExtInfo()->QualifierLoc = QualifierLoc; 1051 } 1052 } 1053} 1054 1055void 1056DeclaratorDecl::setTemplateParameterListsInfo(ASTContext &Context, 1057 unsigned NumTPLists, 1058 TemplateParameterList **TPLists) { 1059 assert(NumTPLists > 0); 1060 // Make sure the extended decl info is allocated. 1061 if (!hasExtInfo()) { 1062 // Save (non-extended) type source info pointer. 1063 TypeSourceInfo *savedTInfo = DeclInfo.get<TypeSourceInfo*>(); 1064 // Allocate external info struct. 1065 DeclInfo = new (getASTContext()) ExtInfo; 1066 // Restore savedTInfo into (extended) decl info. 1067 getExtInfo()->TInfo = savedTInfo; 1068 } 1069 // Set the template parameter lists info. 1070 getExtInfo()->setTemplateParameterListsInfo(Context, NumTPLists, TPLists); 1071} 1072 1073SourceLocation DeclaratorDecl::getOuterLocStart() const { 1074 return getTemplateOrInnerLocStart(this); 1075} 1076 1077namespace { 1078 1079// Helper function: returns true if QT is or contains a type 1080// having a postfix component. 1081bool typeIsPostfix(clang::QualType QT) { 1082 while (true) { 1083 const Type* T = QT.getTypePtr(); 1084 switch (T->getTypeClass()) { 1085 default: 1086 return false; 1087 case Type::Pointer: 1088 QT = cast<PointerType>(T)->getPointeeType(); 1089 break; 1090 case Type::BlockPointer: 1091 QT = cast<BlockPointerType>(T)->getPointeeType(); 1092 break; 1093 case Type::MemberPointer: 1094 QT = cast<MemberPointerType>(T)->getPointeeType(); 1095 break; 1096 case Type::LValueReference: 1097 case Type::RValueReference: 1098 QT = cast<ReferenceType>(T)->getPointeeType(); 1099 break; 1100 case Type::PackExpansion: 1101 QT = cast<PackExpansionType>(T)->getPattern(); 1102 break; 1103 case Type::Paren: 1104 case Type::ConstantArray: 1105 case Type::DependentSizedArray: 1106 case Type::IncompleteArray: 1107 case Type::VariableArray: 1108 case Type::FunctionProto: 1109 case Type::FunctionNoProto: 1110 return true; 1111 } 1112 } 1113} 1114 1115} // namespace 1116 1117SourceRange DeclaratorDecl::getSourceRange() const { 1118 SourceLocation RangeEnd = getLocation(); 1119 if (TypeSourceInfo *TInfo = getTypeSourceInfo()) { 1120 if (typeIsPostfix(TInfo->getType())) 1121 RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd(); 1122 } 1123 return SourceRange(getOuterLocStart(), RangeEnd); 1124} 1125 1126void 1127QualifierInfo::setTemplateParameterListsInfo(ASTContext &Context, 1128 unsigned NumTPLists, 1129 TemplateParameterList **TPLists) { 1130 assert((NumTPLists == 0 || TPLists != 0) && 1131 "Empty array of template parameters with positive size!"); 1132 1133 // Free previous template parameters (if any). 1134 if (NumTemplParamLists > 0) { 1135 Context.Deallocate(TemplParamLists); 1136 TemplParamLists = 0; 1137 NumTemplParamLists = 0; 1138 } 1139 // Set info on matched template parameter lists (if any). 1140 if (NumTPLists > 0) { 1141 TemplParamLists = new (Context) TemplateParameterList*[NumTPLists]; 1142 NumTemplParamLists = NumTPLists; 1143 for (unsigned i = NumTPLists; i-- > 0; ) 1144 TemplParamLists[i] = TPLists[i]; 1145 } 1146} 1147 1148//===----------------------------------------------------------------------===// 1149// VarDecl Implementation 1150//===----------------------------------------------------------------------===// 1151 1152const char *VarDecl::getStorageClassSpecifierString(StorageClass SC) { 1153 switch (SC) { 1154 case SC_None: break; 1155 case SC_Auto: return "auto"; 1156 case SC_Extern: return "extern"; 1157 case SC_OpenCLWorkGroupLocal: return "<<work-group-local>>"; 1158 case SC_PrivateExtern: return "__private_extern__"; 1159 case SC_Register: return "register"; 1160 case SC_Static: return "static"; 1161 } 1162 1163 llvm_unreachable("Invalid storage class"); 1164} 1165 1166VarDecl *VarDecl::Create(ASTContext &C, DeclContext *DC, 1167 SourceLocation StartL, SourceLocation IdL, 1168 IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, 1169 StorageClass S, StorageClass SCAsWritten) { 1170 return new (C) VarDecl(Var, DC, StartL, IdL, Id, T, TInfo, S, SCAsWritten); 1171} 1172 1173VarDecl *VarDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 1174 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(VarDecl)); 1175 return new (Mem) VarDecl(Var, 0, SourceLocation(), SourceLocation(), 0, 1176 QualType(), 0, SC_None, SC_None); 1177} 1178 1179void VarDecl::setStorageClass(StorageClass SC) { 1180 assert(isLegalForVariable(SC)); 1181 if (getStorageClass() != SC) 1182 ClearLinkageCache(); 1183 1184 VarDeclBits.SClass = SC; 1185} 1186 1187SourceRange VarDecl::getSourceRange() const { 1188 if (getInit()) 1189 return SourceRange(getOuterLocStart(), getInit()->getLocEnd()); 1190 return DeclaratorDecl::getSourceRange(); 1191} 1192 1193bool VarDecl::isExternC() const { 1194 if (getLinkage() != ExternalLinkage) 1195 return false; 1196 1197 const DeclContext *DC = getDeclContext(); 1198 if (DC->isRecord()) 1199 return false; 1200 1201 ASTContext &Context = getASTContext(); 1202 if (!Context.getLangOpts().CPlusPlus) 1203 return true; 1204 return DC->isExternCContext(); 1205} 1206 1207VarDecl *VarDecl::getCanonicalDecl() { 1208 return getFirstDeclaration(); 1209} 1210 1211VarDecl::DefinitionKind VarDecl::isThisDeclarationADefinition( 1212 ASTContext &C) const 1213{ 1214 // C++ [basic.def]p2: 1215 // A declaration is a definition unless [...] it contains the 'extern' 1216 // specifier or a linkage-specification and neither an initializer [...], 1217 // it declares a static data member in a class declaration [...]. 1218 // C++ [temp.expl.spec]p15: 1219 // An explicit specialization of a static data member of a template is a 1220 // definition if the declaration includes an initializer; otherwise, it is 1221 // a declaration. 1222 if (isStaticDataMember()) { 1223 if (isOutOfLine() && (hasInit() || 1224 getTemplateSpecializationKind() != TSK_ExplicitSpecialization)) 1225 return Definition; 1226 else 1227 return DeclarationOnly; 1228 } 1229 // C99 6.7p5: 1230 // A definition of an identifier is a declaration for that identifier that 1231 // [...] causes storage to be reserved for that object. 1232 // Note: that applies for all non-file-scope objects. 1233 // C99 6.9.2p1: 1234 // If the declaration of an identifier for an object has file scope and an 1235 // initializer, the declaration is an external definition for the identifier 1236 if (hasInit()) 1237 return Definition; 1238 // AST for 'extern "C" int foo;' is annotated with 'extern'. 1239 if (hasExternalStorage()) 1240 return DeclarationOnly; 1241 1242 if (getStorageClassAsWritten() == SC_Extern || 1243 getStorageClassAsWritten() == SC_PrivateExtern) { 1244 for (const VarDecl *PrevVar = getPreviousDecl(); 1245 PrevVar; PrevVar = PrevVar->getPreviousDecl()) { 1246 if (PrevVar->getLinkage() == InternalLinkage && PrevVar->hasInit()) 1247 return DeclarationOnly; 1248 } 1249 } 1250 // C99 6.9.2p2: 1251 // A declaration of an object that has file scope without an initializer, 1252 // and without a storage class specifier or the scs 'static', constitutes 1253 // a tentative definition. 1254 // No such thing in C++. 1255 if (!C.getLangOpts().CPlusPlus && isFileVarDecl()) 1256 return TentativeDefinition; 1257 1258 // What's left is (in C, block-scope) declarations without initializers or 1259 // external storage. These are definitions. 1260 return Definition; 1261} 1262 1263VarDecl *VarDecl::getActingDefinition() { 1264 DefinitionKind Kind = isThisDeclarationADefinition(); 1265 if (Kind != TentativeDefinition) 1266 return 0; 1267 1268 VarDecl *LastTentative = 0; 1269 VarDecl *First = getFirstDeclaration(); 1270 for (redecl_iterator I = First->redecls_begin(), E = First->redecls_end(); 1271 I != E; ++I) { 1272 Kind = (*I)->isThisDeclarationADefinition(); 1273 if (Kind == Definition) 1274 return 0; 1275 else if (Kind == TentativeDefinition) 1276 LastTentative = *I; 1277 } 1278 return LastTentative; 1279} 1280 1281bool VarDecl::isTentativeDefinitionNow() const { 1282 DefinitionKind Kind = isThisDeclarationADefinition(); 1283 if (Kind != TentativeDefinition) 1284 return false; 1285 1286 for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) { 1287 if ((*I)->isThisDeclarationADefinition() == Definition) 1288 return false; 1289 } 1290 return true; 1291} 1292 1293VarDecl *VarDecl::getDefinition(ASTContext &C) { 1294 VarDecl *First = getFirstDeclaration(); 1295 for (redecl_iterator I = First->redecls_begin(), E = First->redecls_end(); 1296 I != E; ++I) { 1297 if ((*I)->isThisDeclarationADefinition(C) == Definition) 1298 return *I; 1299 } 1300 return 0; 1301} 1302 1303VarDecl::DefinitionKind VarDecl::hasDefinition(ASTContext &C) const { 1304 DefinitionKind Kind = DeclarationOnly; 1305 1306 const VarDecl *First = getFirstDeclaration(); 1307 for (redecl_iterator I = First->redecls_begin(), E = First->redecls_end(); 1308 I != E; ++I) { 1309 Kind = std::max(Kind, (*I)->isThisDeclarationADefinition(C)); 1310 if (Kind == Definition) 1311 break; 1312 } 1313 1314 return Kind; 1315} 1316 1317const Expr *VarDecl::getAnyInitializer(const VarDecl *&D) const { 1318 redecl_iterator I = redecls_begin(), E = redecls_end(); 1319 while (I != E && !I->getInit()) 1320 ++I; 1321 1322 if (I != E) { 1323 D = *I; 1324 return I->getInit(); 1325 } 1326 return 0; 1327} 1328 1329bool VarDecl::isOutOfLine() const { 1330 if (Decl::isOutOfLine()) 1331 return true; 1332 1333 if (!isStaticDataMember()) 1334 return false; 1335 1336 // If this static data member was instantiated from a static data member of 1337 // a class template, check whether that static data member was defined 1338 // out-of-line. 1339 if (VarDecl *VD = getInstantiatedFromStaticDataMember()) 1340 return VD->isOutOfLine(); 1341 1342 return false; 1343} 1344 1345VarDecl *VarDecl::getOutOfLineDefinition() { 1346 if (!isStaticDataMember()) 1347 return 0; 1348 1349 for (VarDecl::redecl_iterator RD = redecls_begin(), RDEnd = redecls_end(); 1350 RD != RDEnd; ++RD) { 1351 if (RD->getLexicalDeclContext()->isFileContext()) 1352 return *RD; 1353 } 1354 1355 return 0; 1356} 1357 1358void VarDecl::setInit(Expr *I) { 1359 if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>()) { 1360 Eval->~EvaluatedStmt(); 1361 getASTContext().Deallocate(Eval); 1362 } 1363 1364 Init = I; 1365} 1366 1367bool VarDecl::isUsableInConstantExpressions(ASTContext &C) const { 1368 const LangOptions &Lang = C.getLangOpts(); 1369 1370 if (!Lang.CPlusPlus) 1371 return false; 1372 1373 // In C++11, any variable of reference type can be used in a constant 1374 // expression if it is initialized by a constant expression. 1375 if (Lang.CPlusPlus0x && getType()->isReferenceType()) 1376 return true; 1377 1378 // Only const objects can be used in constant expressions in C++. C++98 does 1379 // not require the variable to be non-volatile, but we consider this to be a 1380 // defect. 1381 if (!getType().isConstQualified() || getType().isVolatileQualified()) 1382 return false; 1383 1384 // In C++, const, non-volatile variables of integral or enumeration types 1385 // can be used in constant expressions. 1386 if (getType()->isIntegralOrEnumerationType()) 1387 return true; 1388 1389 // Additionally, in C++11, non-volatile constexpr variables can be used in 1390 // constant expressions. 1391 return Lang.CPlusPlus0x && isConstexpr(); 1392} 1393 1394/// Convert the initializer for this declaration to the elaborated EvaluatedStmt 1395/// form, which contains extra information on the evaluated value of the 1396/// initializer. 1397EvaluatedStmt *VarDecl::ensureEvaluatedStmt() const { 1398 EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>(); 1399 if (!Eval) { 1400 Stmt *S = Init.get<Stmt *>(); 1401 Eval = new (getASTContext()) EvaluatedStmt; 1402 Eval->Value = S; 1403 Init = Eval; 1404 } 1405 return Eval; 1406} 1407 1408APValue *VarDecl::evaluateValue() const { 1409 llvm::SmallVector<PartialDiagnosticAt, 8> Notes; 1410 return evaluateValue(Notes); 1411} 1412 1413APValue *VarDecl::evaluateValue( 1414 llvm::SmallVectorImpl<PartialDiagnosticAt> &Notes) const { 1415 EvaluatedStmt *Eval = ensureEvaluatedStmt(); 1416 1417 // We only produce notes indicating why an initializer is non-constant the 1418 // first time it is evaluated. FIXME: The notes won't always be emitted the 1419 // first time we try evaluation, so might not be produced at all. 1420 if (Eval->WasEvaluated) 1421 return Eval->Evaluated.isUninit() ? 0 : &Eval->Evaluated; 1422 1423 const Expr *Init = cast<Expr>(Eval->Value); 1424 assert(!Init->isValueDependent()); 1425 1426 if (Eval->IsEvaluating) { 1427 // FIXME: Produce a diagnostic for self-initialization. 1428 Eval->CheckedICE = true; 1429 Eval->IsICE = false; 1430 return 0; 1431 } 1432 1433 Eval->IsEvaluating = true; 1434 1435 bool Result = Init->EvaluateAsInitializer(Eval->Evaluated, getASTContext(), 1436 this, Notes); 1437 1438 // Ensure the result is an uninitialized APValue if evaluation fails. 1439 if (!Result) 1440 Eval->Evaluated = APValue(); 1441 1442 Eval->IsEvaluating = false; 1443 Eval->WasEvaluated = true; 1444 1445 // In C++11, we have determined whether the initializer was a constant 1446 // expression as a side-effect. 1447 if (getASTContext().getLangOpts().CPlusPlus0x && !Eval->CheckedICE) { 1448 Eval->CheckedICE = true; 1449 Eval->IsICE = Result && Notes.empty(); 1450 } 1451 1452 return Result ? &Eval->Evaluated : 0; 1453} 1454 1455bool VarDecl::checkInitIsICE() const { 1456 // Initializers of weak variables are never ICEs. 1457 if (isWeak()) 1458 return false; 1459 1460 EvaluatedStmt *Eval = ensureEvaluatedStmt(); 1461 if (Eval->CheckedICE) 1462 // We have already checked whether this subexpression is an 1463 // integral constant expression. 1464 return Eval->IsICE; 1465 1466 const Expr *Init = cast<Expr>(Eval->Value); 1467 assert(!Init->isValueDependent()); 1468 1469 // In C++11, evaluate the initializer to check whether it's a constant 1470 // expression. 1471 if (getASTContext().getLangOpts().CPlusPlus0x) { 1472 llvm::SmallVector<PartialDiagnosticAt, 8> Notes; 1473 evaluateValue(Notes); 1474 return Eval->IsICE; 1475 } 1476 1477 // It's an ICE whether or not the definition we found is 1478 // out-of-line. See DR 721 and the discussion in Clang PR 1479 // 6206 for details. 1480 1481 if (Eval->CheckingICE) 1482 return false; 1483 Eval->CheckingICE = true; 1484 1485 Eval->IsICE = Init->isIntegerConstantExpr(getASTContext()); 1486 Eval->CheckingICE = false; 1487 Eval->CheckedICE = true; 1488 return Eval->IsICE; 1489} 1490 1491bool VarDecl::extendsLifetimeOfTemporary() const { 1492 assert(getType()->isReferenceType() &&"Non-references never extend lifetime"); 1493 1494 const Expr *E = getInit(); 1495 if (!E) 1496 return false; 1497 1498 if (const ExprWithCleanups *Cleanups = dyn_cast<ExprWithCleanups>(E)) 1499 E = Cleanups->getSubExpr(); 1500 1501 return isa<MaterializeTemporaryExpr>(E); 1502} 1503 1504VarDecl *VarDecl::getInstantiatedFromStaticDataMember() const { 1505 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) 1506 return cast<VarDecl>(MSI->getInstantiatedFrom()); 1507 1508 return 0; 1509} 1510 1511TemplateSpecializationKind VarDecl::getTemplateSpecializationKind() const { 1512 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) 1513 return MSI->getTemplateSpecializationKind(); 1514 1515 return TSK_Undeclared; 1516} 1517 1518MemberSpecializationInfo *VarDecl::getMemberSpecializationInfo() const { 1519 return getASTContext().getInstantiatedFromStaticDataMember(this); 1520} 1521 1522void VarDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK, 1523 SourceLocation PointOfInstantiation) { 1524 MemberSpecializationInfo *MSI = getMemberSpecializationInfo(); 1525 assert(MSI && "Not an instantiated static data member?"); 1526 MSI->setTemplateSpecializationKind(TSK); 1527 if (TSK != TSK_ExplicitSpecialization && 1528 PointOfInstantiation.isValid() && 1529 MSI->getPointOfInstantiation().isInvalid()) 1530 MSI->setPointOfInstantiation(PointOfInstantiation); 1531} 1532 1533//===----------------------------------------------------------------------===// 1534// ParmVarDecl Implementation 1535//===----------------------------------------------------------------------===// 1536 1537ParmVarDecl *ParmVarDecl::Create(ASTContext &C, DeclContext *DC, 1538 SourceLocation StartLoc, 1539 SourceLocation IdLoc, IdentifierInfo *Id, 1540 QualType T, TypeSourceInfo *TInfo, 1541 StorageClass S, StorageClass SCAsWritten, 1542 Expr *DefArg) { 1543 return new (C) ParmVarDecl(ParmVar, DC, StartLoc, IdLoc, Id, T, TInfo, 1544 S, SCAsWritten, DefArg); 1545} 1546 1547ParmVarDecl *ParmVarDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 1548 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(ParmVarDecl)); 1549 return new (Mem) ParmVarDecl(ParmVar, 0, SourceLocation(), SourceLocation(), 1550 0, QualType(), 0, SC_None, SC_None, 0); 1551} 1552 1553SourceRange ParmVarDecl::getSourceRange() const { 1554 if (!hasInheritedDefaultArg()) { 1555 SourceRange ArgRange = getDefaultArgRange(); 1556 if (ArgRange.isValid()) 1557 return SourceRange(getOuterLocStart(), ArgRange.getEnd()); 1558 } 1559 1560 return DeclaratorDecl::getSourceRange(); 1561} 1562 1563Expr *ParmVarDecl::getDefaultArg() { 1564 assert(!hasUnparsedDefaultArg() && "Default argument is not yet parsed!"); 1565 assert(!hasUninstantiatedDefaultArg() && 1566 "Default argument is not yet instantiated!"); 1567 1568 Expr *Arg = getInit(); 1569 if (ExprWithCleanups *E = dyn_cast_or_null<ExprWithCleanups>(Arg)) 1570 return E->getSubExpr(); 1571 1572 return Arg; 1573} 1574 1575SourceRange ParmVarDecl::getDefaultArgRange() const { 1576 if (const Expr *E = getInit()) 1577 return E->getSourceRange(); 1578 1579 if (hasUninstantiatedDefaultArg()) 1580 return getUninstantiatedDefaultArg()->getSourceRange(); 1581 1582 return SourceRange(); 1583} 1584 1585bool ParmVarDecl::isParameterPack() const { 1586 return isa<PackExpansionType>(getType()); 1587} 1588 1589void ParmVarDecl::setParameterIndexLarge(unsigned parameterIndex) { 1590 getASTContext().setParameterIndex(this, parameterIndex); 1591 ParmVarDeclBits.ParameterIndex = ParameterIndexSentinel; 1592} 1593 1594unsigned ParmVarDecl::getParameterIndexLarge() const { 1595 return getASTContext().getParameterIndex(this); 1596} 1597 1598//===----------------------------------------------------------------------===// 1599// FunctionDecl Implementation 1600//===----------------------------------------------------------------------===// 1601 1602void FunctionDecl::getNameForDiagnostic(std::string &S, 1603 const PrintingPolicy &Policy, 1604 bool Qualified) const { 1605 NamedDecl::getNameForDiagnostic(S, Policy, Qualified); 1606 const TemplateArgumentList *TemplateArgs = getTemplateSpecializationArgs(); 1607 if (TemplateArgs) 1608 S += TemplateSpecializationType::PrintTemplateArgumentList( 1609 TemplateArgs->data(), 1610 TemplateArgs->size(), 1611 Policy); 1612 1613} 1614 1615bool FunctionDecl::isVariadic() const { 1616 if (const FunctionProtoType *FT = getType()->getAs<FunctionProtoType>()) 1617 return FT->isVariadic(); 1618 return false; 1619} 1620 1621bool FunctionDecl::hasBody(const FunctionDecl *&Definition) const { 1622 for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) { 1623 if (I->Body || I->IsLateTemplateParsed) { 1624 Definition = *I; 1625 return true; 1626 } 1627 } 1628 1629 return false; 1630} 1631 1632bool FunctionDecl::hasTrivialBody() const 1633{ 1634 Stmt *S = getBody(); 1635 if (!S) { 1636 // Since we don't have a body for this function, we don't know if it's 1637 // trivial or not. 1638 return false; 1639 } 1640 1641 if (isa<CompoundStmt>(S) && cast<CompoundStmt>(S)->body_empty()) 1642 return true; 1643 return false; 1644} 1645 1646bool FunctionDecl::isDefined(const FunctionDecl *&Definition) const { 1647 for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) { 1648 if (I->IsDeleted || I->IsDefaulted || I->Body || I->IsLateTemplateParsed) { 1649 Definition = I->IsDeleted ? I->getCanonicalDecl() : *I; 1650 return true; 1651 } 1652 } 1653 1654 return false; 1655} 1656 1657Stmt *FunctionDecl::getBody(const FunctionDecl *&Definition) const { 1658 for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) { 1659 if (I->Body) { 1660 Definition = *I; 1661 return I->Body.get(getASTContext().getExternalSource()); 1662 } else if (I->IsLateTemplateParsed) { 1663 Definition = *I; 1664 return 0; 1665 } 1666 } 1667 1668 return 0; 1669} 1670 1671void FunctionDecl::setBody(Stmt *B) { 1672 Body = B; 1673 if (B) 1674 EndRangeLoc = B->getLocEnd(); 1675} 1676 1677void FunctionDecl::setPure(bool P) { 1678 IsPure = P; 1679 if (P) 1680 if (CXXRecordDecl *Parent = dyn_cast<CXXRecordDecl>(getDeclContext())) 1681 Parent->markedVirtualFunctionPure(); 1682} 1683 1684bool FunctionDecl::isMain() const { 1685 const TranslationUnitDecl *tunit = 1686 dyn_cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext()); 1687 return tunit && 1688 !tunit->getASTContext().getLangOpts().Freestanding && 1689 getIdentifier() && 1690 getIdentifier()->isStr("main"); 1691} 1692 1693bool FunctionDecl::isReservedGlobalPlacementOperator() const { 1694 assert(getDeclName().getNameKind() == DeclarationName::CXXOperatorName); 1695 assert(getDeclName().getCXXOverloadedOperator() == OO_New || 1696 getDeclName().getCXXOverloadedOperator() == OO_Delete || 1697 getDeclName().getCXXOverloadedOperator() == OO_Array_New || 1698 getDeclName().getCXXOverloadedOperator() == OO_Array_Delete); 1699 1700 if (isa<CXXRecordDecl>(getDeclContext())) return false; 1701 assert(getDeclContext()->getRedeclContext()->isTranslationUnit()); 1702 1703 const FunctionProtoType *proto = getType()->castAs<FunctionProtoType>(); 1704 if (proto->getNumArgs() != 2 || proto->isVariadic()) return false; 1705 1706 ASTContext &Context = 1707 cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext()) 1708 ->getASTContext(); 1709 1710 // The result type and first argument type are constant across all 1711 // these operators. The second argument must be exactly void*. 1712 return (proto->getArgType(1).getCanonicalType() == Context.VoidPtrTy); 1713} 1714 1715bool FunctionDecl::isExternC() const { 1716 if (getLinkage() != ExternalLinkage) 1717 return false; 1718 1719 if (getAttr<OverloadableAttr>()) 1720 return false; 1721 1722 const DeclContext *DC = getDeclContext(); 1723 if (DC->isRecord()) 1724 return false; 1725 1726 ASTContext &Context = getASTContext(); 1727 if (!Context.getLangOpts().CPlusPlus) 1728 return true; 1729 1730 return isMain() || DC->isExternCContext(); 1731} 1732 1733bool FunctionDecl::isGlobal() const { 1734 if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(this)) 1735 return Method->isStatic(); 1736 1737 if (getStorageClass() == SC_Static) 1738 return false; 1739 1740 for (const DeclContext *DC = getDeclContext(); 1741 DC->isNamespace(); 1742 DC = DC->getParent()) { 1743 if (const NamespaceDecl *Namespace = cast<NamespaceDecl>(DC)) { 1744 if (!Namespace->getDeclName()) 1745 return false; 1746 break; 1747 } 1748 } 1749 1750 return true; 1751} 1752 1753void 1754FunctionDecl::setPreviousDeclaration(FunctionDecl *PrevDecl) { 1755 redeclarable_base::setPreviousDeclaration(PrevDecl); 1756 1757 if (FunctionTemplateDecl *FunTmpl = getDescribedFunctionTemplate()) { 1758 FunctionTemplateDecl *PrevFunTmpl 1759 = PrevDecl? PrevDecl->getDescribedFunctionTemplate() : 0; 1760 assert((!PrevDecl || PrevFunTmpl) && "Function/function template mismatch"); 1761 FunTmpl->setPreviousDeclaration(PrevFunTmpl); 1762 } 1763 1764 if (PrevDecl && PrevDecl->IsInline) 1765 IsInline = true; 1766} 1767 1768const FunctionDecl *FunctionDecl::getCanonicalDecl() const { 1769 return getFirstDeclaration(); 1770} 1771 1772FunctionDecl *FunctionDecl::getCanonicalDecl() { 1773 return getFirstDeclaration(); 1774} 1775 1776void FunctionDecl::setStorageClass(StorageClass SC) { 1777 assert(isLegalForFunction(SC)); 1778 if (getStorageClass() != SC) 1779 ClearLinkageCache(); 1780 1781 SClass = SC; 1782} 1783 1784/// \brief Returns a value indicating whether this function 1785/// corresponds to a builtin function. 1786/// 1787/// The function corresponds to a built-in function if it is 1788/// declared at translation scope or within an extern "C" block and 1789/// its name matches with the name of a builtin. The returned value 1790/// will be 0 for functions that do not correspond to a builtin, a 1791/// value of type \c Builtin::ID if in the target-independent range 1792/// \c [1,Builtin::First), or a target-specific builtin value. 1793unsigned FunctionDecl::getBuiltinID() const { 1794 if (!getIdentifier()) 1795 return 0; 1796 1797 unsigned BuiltinID = getIdentifier()->getBuiltinID(); 1798 if (!BuiltinID) 1799 return 0; 1800 1801 ASTContext &Context = getASTContext(); 1802 if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) 1803 return BuiltinID; 1804 1805 // This function has the name of a known C library 1806 // function. Determine whether it actually refers to the C library 1807 // function or whether it just has the same name. 1808 1809 // If this is a static function, it's not a builtin. 1810 if (getStorageClass() == SC_Static) 1811 return 0; 1812 1813 // If this function is at translation-unit scope and we're not in 1814 // C++, it refers to the C library function. 1815 if (!Context.getLangOpts().CPlusPlus && 1816 getDeclContext()->isTranslationUnit()) 1817 return BuiltinID; 1818 1819 // If the function is in an extern "C" linkage specification and is 1820 // not marked "overloadable", it's the real function. 1821 if (isa<LinkageSpecDecl>(getDeclContext()) && 1822 cast<LinkageSpecDecl>(getDeclContext())->getLanguage() 1823 == LinkageSpecDecl::lang_c && 1824 !getAttr<OverloadableAttr>()) 1825 return BuiltinID; 1826 1827 // Not a builtin 1828 return 0; 1829} 1830 1831 1832/// getNumParams - Return the number of parameters this function must have 1833/// based on its FunctionType. This is the length of the ParamInfo array 1834/// after it has been created. 1835unsigned FunctionDecl::getNumParams() const { 1836 const FunctionType *FT = getType()->getAs<FunctionType>(); 1837 if (isa<FunctionNoProtoType>(FT)) 1838 return 0; 1839 return cast<FunctionProtoType>(FT)->getNumArgs(); 1840 1841} 1842 1843void FunctionDecl::setParams(ASTContext &C, 1844 llvm::ArrayRef<ParmVarDecl *> NewParamInfo) { 1845 assert(ParamInfo == 0 && "Already has param info!"); 1846 assert(NewParamInfo.size() == getNumParams() && "Parameter count mismatch!"); 1847 1848 // Zero params -> null pointer. 1849 if (!NewParamInfo.empty()) { 1850 ParamInfo = new (C) ParmVarDecl*[NewParamInfo.size()]; 1851 std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo); 1852 } 1853} 1854 1855void FunctionDecl::setDeclsInPrototypeScope(llvm::ArrayRef<NamedDecl *> NewDecls) { 1856 assert(DeclsInPrototypeScope.empty() && "Already has prototype decls!"); 1857 1858 if (!NewDecls.empty()) { 1859 NamedDecl **A = new (getASTContext()) NamedDecl*[NewDecls.size()]; 1860 std::copy(NewDecls.begin(), NewDecls.end(), A); 1861 DeclsInPrototypeScope = llvm::ArrayRef<NamedDecl*>(A, NewDecls.size()); 1862 } 1863} 1864 1865/// getMinRequiredArguments - Returns the minimum number of arguments 1866/// needed to call this function. This may be fewer than the number of 1867/// function parameters, if some of the parameters have default 1868/// arguments (in C++) or the last parameter is a parameter pack. 1869unsigned FunctionDecl::getMinRequiredArguments() const { 1870 if (!getASTContext().getLangOpts().CPlusPlus) 1871 return getNumParams(); 1872 1873 unsigned NumRequiredArgs = getNumParams(); 1874 1875 // If the last parameter is a parameter pack, we don't need an argument for 1876 // it. 1877 if (NumRequiredArgs > 0 && 1878 getParamDecl(NumRequiredArgs - 1)->isParameterPack()) 1879 --NumRequiredArgs; 1880 1881 // If this parameter has a default argument, we don't need an argument for 1882 // it. 1883 while (NumRequiredArgs > 0 && 1884 getParamDecl(NumRequiredArgs-1)->hasDefaultArg()) 1885 --NumRequiredArgs; 1886 1887 // We might have parameter packs before the end. These can't be deduced, 1888 // but they can still handle multiple arguments. 1889 unsigned ArgIdx = NumRequiredArgs; 1890 while (ArgIdx > 0) { 1891 if (getParamDecl(ArgIdx - 1)->isParameterPack()) 1892 NumRequiredArgs = ArgIdx; 1893 1894 --ArgIdx; 1895 } 1896 1897 return NumRequiredArgs; 1898} 1899 1900bool FunctionDecl::isInlined() const { 1901 if (IsInline) 1902 return true; 1903 1904 if (isa<CXXMethodDecl>(this)) { 1905 if (!isOutOfLine() || getCanonicalDecl()->isInlineSpecified()) 1906 return true; 1907 } 1908 1909 switch (getTemplateSpecializationKind()) { 1910 case TSK_Undeclared: 1911 case TSK_ExplicitSpecialization: 1912 return false; 1913 1914 case TSK_ImplicitInstantiation: 1915 case TSK_ExplicitInstantiationDeclaration: 1916 case TSK_ExplicitInstantiationDefinition: 1917 // Handle below. 1918 break; 1919 } 1920 1921 const FunctionDecl *PatternDecl = getTemplateInstantiationPattern(); 1922 bool HasPattern = false; 1923 if (PatternDecl) 1924 HasPattern = PatternDecl->hasBody(PatternDecl); 1925 1926 if (HasPattern && PatternDecl) 1927 return PatternDecl->isInlined(); 1928 1929 return false; 1930} 1931 1932static bool RedeclForcesDefC99(const FunctionDecl *Redecl) { 1933 // Only consider file-scope declarations in this test. 1934 if (!Redecl->getLexicalDeclContext()->isTranslationUnit()) 1935 return false; 1936 1937 // Only consider explicit declarations; the presence of a builtin for a 1938 // libcall shouldn't affect whether a definition is externally visible. 1939 if (Redecl->isImplicit()) 1940 return false; 1941 1942 if (!Redecl->isInlineSpecified() || Redecl->getStorageClass() == SC_Extern) 1943 return true; // Not an inline definition 1944 1945 return false; 1946} 1947 1948/// \brief For a function declaration in C or C++, determine whether this 1949/// declaration causes the definition to be externally visible. 1950/// 1951/// Specifically, this determines if adding the current declaration to the set 1952/// of redeclarations of the given functions causes 1953/// isInlineDefinitionExternallyVisible to change from false to true. 1954bool FunctionDecl::doesDeclarationForceExternallyVisibleDefinition() const { 1955 assert(!doesThisDeclarationHaveABody() && 1956 "Must have a declaration without a body."); 1957 1958 ASTContext &Context = getASTContext(); 1959 1960 if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) { 1961 // With GNU inlining, a declaration with 'inline' but not 'extern', forces 1962 // an externally visible definition. 1963 // 1964 // FIXME: What happens if gnu_inline gets added on after the first 1965 // declaration? 1966 if (!isInlineSpecified() || getStorageClassAsWritten() == SC_Extern) 1967 return false; 1968 1969 const FunctionDecl *Prev = this; 1970 bool FoundBody = false; 1971 while ((Prev = Prev->getPreviousDecl())) { 1972 FoundBody |= Prev->Body; 1973 1974 if (Prev->Body) { 1975 // If it's not the case that both 'inline' and 'extern' are 1976 // specified on the definition, then it is always externally visible. 1977 if (!Prev->isInlineSpecified() || 1978 Prev->getStorageClassAsWritten() != SC_Extern) 1979 return false; 1980 } else if (Prev->isInlineSpecified() && 1981 Prev->getStorageClassAsWritten() != SC_Extern) { 1982 return false; 1983 } 1984 } 1985 return FoundBody; 1986 } 1987 1988 if (Context.getLangOpts().CPlusPlus) 1989 return false; 1990 1991 // C99 6.7.4p6: 1992 // [...] If all of the file scope declarations for a function in a 1993 // translation unit include the inline function specifier without extern, 1994 // then the definition in that translation unit is an inline definition. 1995 if (isInlineSpecified() && getStorageClass() != SC_Extern) 1996 return false; 1997 const FunctionDecl *Prev = this; 1998 bool FoundBody = false; 1999 while ((Prev = Prev->getPreviousDecl())) { 2000 FoundBody |= Prev->Body; 2001 if (RedeclForcesDefC99(Prev)) 2002 return false; 2003 } 2004 return FoundBody; 2005} 2006 2007/// \brief For an inline function definition in C or C++, determine whether the 2008/// definition will be externally visible. 2009/// 2010/// Inline function definitions are always available for inlining optimizations. 2011/// However, depending on the language dialect, declaration specifiers, and 2012/// attributes, the definition of an inline function may or may not be 2013/// "externally" visible to other translation units in the program. 2014/// 2015/// In C99, inline definitions are not externally visible by default. However, 2016/// if even one of the global-scope declarations is marked "extern inline", the 2017/// inline definition becomes externally visible (C99 6.7.4p6). 2018/// 2019/// In GNU89 mode, or if the gnu_inline attribute is attached to the function 2020/// definition, we use the GNU semantics for inline, which are nearly the 2021/// opposite of C99 semantics. In particular, "inline" by itself will create 2022/// an externally visible symbol, but "extern inline" will not create an 2023/// externally visible symbol. 2024bool FunctionDecl::isInlineDefinitionExternallyVisible() const { 2025 assert(doesThisDeclarationHaveABody() && "Must have the function definition"); 2026 assert(isInlined() && "Function must be inline"); 2027 ASTContext &Context = getASTContext(); 2028 2029 if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) { 2030 // Note: If you change the logic here, please change 2031 // doesDeclarationForceExternallyVisibleDefinition as well. 2032 // 2033 // If it's not the case that both 'inline' and 'extern' are 2034 // specified on the definition, then this inline definition is 2035 // externally visible. 2036 if (!(isInlineSpecified() && getStorageClassAsWritten() == SC_Extern)) 2037 return true; 2038 2039 // If any declaration is 'inline' but not 'extern', then this definition 2040 // is externally visible. 2041 for (redecl_iterator Redecl = redecls_begin(), RedeclEnd = redecls_end(); 2042 Redecl != RedeclEnd; 2043 ++Redecl) { 2044 if (Redecl->isInlineSpecified() && 2045 Redecl->getStorageClassAsWritten() != SC_Extern) 2046 return true; 2047 } 2048 2049 return false; 2050 } 2051 2052 // C99 6.7.4p6: 2053 // [...] If all of the file scope declarations for a function in a 2054 // translation unit include the inline function specifier without extern, 2055 // then the definition in that translation unit is an inline definition. 2056 for (redecl_iterator Redecl = redecls_begin(), RedeclEnd = redecls_end(); 2057 Redecl != RedeclEnd; 2058 ++Redecl) { 2059 if (RedeclForcesDefC99(*Redecl)) 2060 return true; 2061 } 2062 2063 // C99 6.7.4p6: 2064 // An inline definition does not provide an external definition for the 2065 // function, and does not forbid an external definition in another 2066 // translation unit. 2067 return false; 2068} 2069 2070/// getOverloadedOperator - Which C++ overloaded operator this 2071/// function represents, if any. 2072OverloadedOperatorKind FunctionDecl::getOverloadedOperator() const { 2073 if (getDeclName().getNameKind() == DeclarationName::CXXOperatorName) 2074 return getDeclName().getCXXOverloadedOperator(); 2075 else 2076 return OO_None; 2077} 2078 2079/// getLiteralIdentifier - The literal suffix identifier this function 2080/// represents, if any. 2081const IdentifierInfo *FunctionDecl::getLiteralIdentifier() const { 2082 if (getDeclName().getNameKind() == DeclarationName::CXXLiteralOperatorName) 2083 return getDeclName().getCXXLiteralIdentifier(); 2084 else 2085 return 0; 2086} 2087 2088FunctionDecl::TemplatedKind FunctionDecl::getTemplatedKind() const { 2089 if (TemplateOrSpecialization.isNull()) 2090 return TK_NonTemplate; 2091 if (TemplateOrSpecialization.is<FunctionTemplateDecl *>()) 2092 return TK_FunctionTemplate; 2093 if (TemplateOrSpecialization.is<MemberSpecializationInfo *>()) 2094 return TK_MemberSpecialization; 2095 if (TemplateOrSpecialization.is<FunctionTemplateSpecializationInfo *>()) 2096 return TK_FunctionTemplateSpecialization; 2097 if (TemplateOrSpecialization.is 2098 <DependentFunctionTemplateSpecializationInfo*>()) 2099 return TK_DependentFunctionTemplateSpecialization; 2100 2101 llvm_unreachable("Did we miss a TemplateOrSpecialization type?"); 2102} 2103 2104FunctionDecl *FunctionDecl::getInstantiatedFromMemberFunction() const { 2105 if (MemberSpecializationInfo *Info = getMemberSpecializationInfo()) 2106 return cast<FunctionDecl>(Info->getInstantiatedFrom()); 2107 2108 return 0; 2109} 2110 2111MemberSpecializationInfo *FunctionDecl::getMemberSpecializationInfo() const { 2112 return TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>(); 2113} 2114 2115void 2116FunctionDecl::setInstantiationOfMemberFunction(ASTContext &C, 2117 FunctionDecl *FD, 2118 TemplateSpecializationKind TSK) { 2119 assert(TemplateOrSpecialization.isNull() && 2120 "Member function is already a specialization"); 2121 MemberSpecializationInfo *Info 2122 = new (C) MemberSpecializationInfo(FD, TSK); 2123 TemplateOrSpecialization = Info; 2124} 2125 2126bool FunctionDecl::isImplicitlyInstantiable() const { 2127 // If the function is invalid, it can't be implicitly instantiated. 2128 if (isInvalidDecl()) 2129 return false; 2130 2131 switch (getTemplateSpecializationKind()) { 2132 case TSK_Undeclared: 2133 case TSK_ExplicitInstantiationDefinition: 2134 return false; 2135 2136 case TSK_ImplicitInstantiation: 2137 return true; 2138 2139 // It is possible to instantiate TSK_ExplicitSpecialization kind 2140 // if the FunctionDecl has a class scope specialization pattern. 2141 case TSK_ExplicitSpecialization: 2142 return getClassScopeSpecializationPattern() != 0; 2143 2144 case TSK_ExplicitInstantiationDeclaration: 2145 // Handled below. 2146 break; 2147 } 2148 2149 // Find the actual template from which we will instantiate. 2150 const FunctionDecl *PatternDecl = getTemplateInstantiationPattern(); 2151 bool HasPattern = false; 2152 if (PatternDecl) 2153 HasPattern = PatternDecl->hasBody(PatternDecl); 2154 2155 // C++0x [temp.explicit]p9: 2156 // Except for inline functions, other explicit instantiation declarations 2157 // have the effect of suppressing the implicit instantiation of the entity 2158 // to which they refer. 2159 if (!HasPattern || !PatternDecl) 2160 return true; 2161 2162 return PatternDecl->isInlined(); 2163} 2164 2165bool FunctionDecl::isTemplateInstantiation() const { 2166 switch (getTemplateSpecializationKind()) { 2167 case TSK_Undeclared: 2168 case TSK_ExplicitSpecialization: 2169 return false; 2170 case TSK_ImplicitInstantiation: 2171 case TSK_ExplicitInstantiationDeclaration: 2172 case TSK_ExplicitInstantiationDefinition: 2173 return true; 2174 } 2175 llvm_unreachable("All TSK values handled."); 2176} 2177 2178FunctionDecl *FunctionDecl::getTemplateInstantiationPattern() const { 2179 // Handle class scope explicit specialization special case. 2180 if (getTemplateSpecializationKind() == TSK_ExplicitSpecialization) 2181 return getClassScopeSpecializationPattern(); 2182 2183 if (FunctionTemplateDecl *Primary = getPrimaryTemplate()) { 2184 while (Primary->getInstantiatedFromMemberTemplate()) { 2185 // If we have hit a point where the user provided a specialization of 2186 // this template, we're done looking. 2187 if (Primary->isMemberSpecialization()) 2188 break; 2189 2190 Primary = Primary->getInstantiatedFromMemberTemplate(); 2191 } 2192 2193 return Primary->getTemplatedDecl(); 2194 } 2195 2196 return getInstantiatedFromMemberFunction(); 2197} 2198 2199FunctionTemplateDecl *FunctionDecl::getPrimaryTemplate() const { 2200 if (FunctionTemplateSpecializationInfo *Info 2201 = TemplateOrSpecialization 2202 .dyn_cast<FunctionTemplateSpecializationInfo*>()) { 2203 return Info->Template.getPointer(); 2204 } 2205 return 0; 2206} 2207 2208FunctionDecl *FunctionDecl::getClassScopeSpecializationPattern() const { 2209 return getASTContext().getClassScopeSpecializationPattern(this); 2210} 2211 2212const TemplateArgumentList * 2213FunctionDecl::getTemplateSpecializationArgs() const { 2214 if (FunctionTemplateSpecializationInfo *Info 2215 = TemplateOrSpecialization 2216 .dyn_cast<FunctionTemplateSpecializationInfo*>()) { 2217 return Info->TemplateArguments; 2218 } 2219 return 0; 2220} 2221 2222const ASTTemplateArgumentListInfo * 2223FunctionDecl::getTemplateSpecializationArgsAsWritten() const { 2224 if (FunctionTemplateSpecializationInfo *Info 2225 = TemplateOrSpecialization 2226 .dyn_cast<FunctionTemplateSpecializationInfo*>()) { 2227 return Info->TemplateArgumentsAsWritten; 2228 } 2229 return 0; 2230} 2231 2232void 2233FunctionDecl::setFunctionTemplateSpecialization(ASTContext &C, 2234 FunctionTemplateDecl *Template, 2235 const TemplateArgumentList *TemplateArgs, 2236 void *InsertPos, 2237 TemplateSpecializationKind TSK, 2238 const TemplateArgumentListInfo *TemplateArgsAsWritten, 2239 SourceLocation PointOfInstantiation) { 2240 assert(TSK != TSK_Undeclared && 2241 "Must specify the type of function template specialization"); 2242 FunctionTemplateSpecializationInfo *Info 2243 = TemplateOrSpecialization.dyn_cast<FunctionTemplateSpecializationInfo*>(); 2244 if (!Info) 2245 Info = FunctionTemplateSpecializationInfo::Create(C, this, Template, TSK, 2246 TemplateArgs, 2247 TemplateArgsAsWritten, 2248 PointOfInstantiation); 2249 TemplateOrSpecialization = Info; 2250 Template->addSpecialization(Info, InsertPos); 2251} 2252 2253void 2254FunctionDecl::setDependentTemplateSpecialization(ASTContext &Context, 2255 const UnresolvedSetImpl &Templates, 2256 const TemplateArgumentListInfo &TemplateArgs) { 2257 assert(TemplateOrSpecialization.isNull()); 2258 size_t Size = sizeof(DependentFunctionTemplateSpecializationInfo); 2259 Size += Templates.size() * sizeof(FunctionTemplateDecl*); 2260 Size += TemplateArgs.size() * sizeof(TemplateArgumentLoc); 2261 void *Buffer = Context.Allocate(Size); 2262 DependentFunctionTemplateSpecializationInfo *Info = 2263 new (Buffer) DependentFunctionTemplateSpecializationInfo(Templates, 2264 TemplateArgs); 2265 TemplateOrSpecialization = Info; 2266} 2267 2268DependentFunctionTemplateSpecializationInfo:: 2269DependentFunctionTemplateSpecializationInfo(const UnresolvedSetImpl &Ts, 2270 const TemplateArgumentListInfo &TArgs) 2271 : AngleLocs(TArgs.getLAngleLoc(), TArgs.getRAngleLoc()) { 2272 2273 d.NumTemplates = Ts.size(); 2274 d.NumArgs = TArgs.size(); 2275 2276 FunctionTemplateDecl **TsArray = 2277 const_cast<FunctionTemplateDecl**>(getTemplates()); 2278 for (unsigned I = 0, E = Ts.size(); I != E; ++I) 2279 TsArray[I] = cast<FunctionTemplateDecl>(Ts[I]->getUnderlyingDecl()); 2280 2281 TemplateArgumentLoc *ArgsArray = 2282 const_cast<TemplateArgumentLoc*>(getTemplateArgs()); 2283 for (unsigned I = 0, E = TArgs.size(); I != E; ++I) 2284 new (&ArgsArray[I]) TemplateArgumentLoc(TArgs[I]); 2285} 2286 2287TemplateSpecializationKind FunctionDecl::getTemplateSpecializationKind() const { 2288 // For a function template specialization, query the specialization 2289 // information object. 2290 FunctionTemplateSpecializationInfo *FTSInfo 2291 = TemplateOrSpecialization.dyn_cast<FunctionTemplateSpecializationInfo*>(); 2292 if (FTSInfo) 2293 return FTSInfo->getTemplateSpecializationKind(); 2294 2295 MemberSpecializationInfo *MSInfo 2296 = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>(); 2297 if (MSInfo) 2298 return MSInfo->getTemplateSpecializationKind(); 2299 2300 return TSK_Undeclared; 2301} 2302 2303void 2304FunctionDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK, 2305 SourceLocation PointOfInstantiation) { 2306 if (FunctionTemplateSpecializationInfo *FTSInfo 2307 = TemplateOrSpecialization.dyn_cast< 2308 FunctionTemplateSpecializationInfo*>()) { 2309 FTSInfo->setTemplateSpecializationKind(TSK); 2310 if (TSK != TSK_ExplicitSpecialization && 2311 PointOfInstantiation.isValid() && 2312 FTSInfo->getPointOfInstantiation().isInvalid()) 2313 FTSInfo->setPointOfInstantiation(PointOfInstantiation); 2314 } else if (MemberSpecializationInfo *MSInfo 2315 = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>()) { 2316 MSInfo->setTemplateSpecializationKind(TSK); 2317 if (TSK != TSK_ExplicitSpecialization && 2318 PointOfInstantiation.isValid() && 2319 MSInfo->getPointOfInstantiation().isInvalid()) 2320 MSInfo->setPointOfInstantiation(PointOfInstantiation); 2321 } else 2322 llvm_unreachable("Function cannot have a template specialization kind"); 2323} 2324 2325SourceLocation FunctionDecl::getPointOfInstantiation() const { 2326 if (FunctionTemplateSpecializationInfo *FTSInfo 2327 = TemplateOrSpecialization.dyn_cast< 2328 FunctionTemplateSpecializationInfo*>()) 2329 return FTSInfo->getPointOfInstantiation(); 2330 else if (MemberSpecializationInfo *MSInfo 2331 = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>()) 2332 return MSInfo->getPointOfInstantiation(); 2333 2334 return SourceLocation(); 2335} 2336 2337bool FunctionDecl::isOutOfLine() const { 2338 if (Decl::isOutOfLine()) 2339 return true; 2340 2341 // If this function was instantiated from a member function of a 2342 // class template, check whether that member function was defined out-of-line. 2343 if (FunctionDecl *FD = getInstantiatedFromMemberFunction()) { 2344 const FunctionDecl *Definition; 2345 if (FD->hasBody(Definition)) 2346 return Definition->isOutOfLine(); 2347 } 2348 2349 // If this function was instantiated from a function template, 2350 // check whether that function template was defined out-of-line. 2351 if (FunctionTemplateDecl *FunTmpl = getPrimaryTemplate()) { 2352 const FunctionDecl *Definition; 2353 if (FunTmpl->getTemplatedDecl()->hasBody(Definition)) 2354 return Definition->isOutOfLine(); 2355 } 2356 2357 return false; 2358} 2359 2360SourceRange FunctionDecl::getSourceRange() const { 2361 return SourceRange(getOuterLocStart(), EndRangeLoc); 2362} 2363 2364unsigned FunctionDecl::getMemoryFunctionKind() const { 2365 IdentifierInfo *FnInfo = getIdentifier(); 2366 2367 if (!FnInfo) 2368 return 0; 2369 2370 // Builtin handling. 2371 switch (getBuiltinID()) { 2372 case Builtin::BI__builtin_memset: 2373 case Builtin::BI__builtin___memset_chk: 2374 case Builtin::BImemset: 2375 return Builtin::BImemset; 2376 2377 case Builtin::BI__builtin_memcpy: 2378 case Builtin::BI__builtin___memcpy_chk: 2379 case Builtin::BImemcpy: 2380 return Builtin::BImemcpy; 2381 2382 case Builtin::BI__builtin_memmove: 2383 case Builtin::BI__builtin___memmove_chk: 2384 case Builtin::BImemmove: 2385 return Builtin::BImemmove; 2386 2387 case Builtin::BIstrlcpy: 2388 return Builtin::BIstrlcpy; 2389 case Builtin::BIstrlcat: 2390 return Builtin::BIstrlcat; 2391 2392 case Builtin::BI__builtin_memcmp: 2393 case Builtin::BImemcmp: 2394 return Builtin::BImemcmp; 2395 2396 case Builtin::BI__builtin_strncpy: 2397 case Builtin::BI__builtin___strncpy_chk: 2398 case Builtin::BIstrncpy: 2399 return Builtin::BIstrncpy; 2400 2401 case Builtin::BI__builtin_strncmp: 2402 case Builtin::BIstrncmp: 2403 return Builtin::BIstrncmp; 2404 2405 case Builtin::BI__builtin_strncasecmp: 2406 case Builtin::BIstrncasecmp: 2407 return Builtin::BIstrncasecmp; 2408 2409 case Builtin::BI__builtin_strncat: 2410 case Builtin::BI__builtin___strncat_chk: 2411 case Builtin::BIstrncat: 2412 return Builtin::BIstrncat; 2413 2414 case Builtin::BI__builtin_strndup: 2415 case Builtin::BIstrndup: 2416 return Builtin::BIstrndup; 2417 2418 case Builtin::BI__builtin_strlen: 2419 case Builtin::BIstrlen: 2420 return Builtin::BIstrlen; 2421 2422 default: 2423 if (isExternC()) { 2424 if (FnInfo->isStr("memset")) 2425 return Builtin::BImemset; 2426 else if (FnInfo->isStr("memcpy")) 2427 return Builtin::BImemcpy; 2428 else if (FnInfo->isStr("memmove")) 2429 return Builtin::BImemmove; 2430 else if (FnInfo->isStr("memcmp")) 2431 return Builtin::BImemcmp; 2432 else if (FnInfo->isStr("strncpy")) 2433 return Builtin::BIstrncpy; 2434 else if (FnInfo->isStr("strncmp")) 2435 return Builtin::BIstrncmp; 2436 else if (FnInfo->isStr("strncasecmp")) 2437 return Builtin::BIstrncasecmp; 2438 else if (FnInfo->isStr("strncat")) 2439 return Builtin::BIstrncat; 2440 else if (FnInfo->isStr("strndup")) 2441 return Builtin::BIstrndup; 2442 else if (FnInfo->isStr("strlen")) 2443 return Builtin::BIstrlen; 2444 } 2445 break; 2446 } 2447 return 0; 2448} 2449 2450//===----------------------------------------------------------------------===// 2451// FieldDecl Implementation 2452//===----------------------------------------------------------------------===// 2453 2454FieldDecl *FieldDecl::Create(const ASTContext &C, DeclContext *DC, 2455 SourceLocation StartLoc, SourceLocation IdLoc, 2456 IdentifierInfo *Id, QualType T, 2457 TypeSourceInfo *TInfo, Expr *BW, bool Mutable, 2458 bool HasInit) { 2459 return new (C) FieldDecl(Decl::Field, DC, StartLoc, IdLoc, Id, T, TInfo, 2460 BW, Mutable, HasInit); 2461} 2462 2463FieldDecl *FieldDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 2464 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(FieldDecl)); 2465 return new (Mem) FieldDecl(Field, 0, SourceLocation(), SourceLocation(), 2466 0, QualType(), 0, 0, false, false); 2467} 2468 2469bool FieldDecl::isAnonymousStructOrUnion() const { 2470 if (!isImplicit() || getDeclName()) 2471 return false; 2472 2473 if (const RecordType *Record = getType()->getAs<RecordType>()) 2474 return Record->getDecl()->isAnonymousStructOrUnion(); 2475 2476 return false; 2477} 2478 2479unsigned FieldDecl::getBitWidthValue(const ASTContext &Ctx) const { 2480 assert(isBitField() && "not a bitfield"); 2481 Expr *BitWidth = InitializerOrBitWidth.getPointer(); 2482 return BitWidth->EvaluateKnownConstInt(Ctx).getZExtValue(); 2483} 2484 2485unsigned FieldDecl::getFieldIndex() const { 2486 if (CachedFieldIndex) return CachedFieldIndex - 1; 2487 2488 unsigned Index = 0; 2489 const RecordDecl *RD = getParent(); 2490 const FieldDecl *LastFD = 0; 2491 bool IsMsStruct = RD->hasAttr<MsStructAttr>(); 2492 2493 for (RecordDecl::field_iterator I = RD->field_begin(), E = RD->field_end(); 2494 I != E; ++I, ++Index) { 2495 (*I)->CachedFieldIndex = Index + 1; 2496 2497 if (IsMsStruct) { 2498 // Zero-length bitfields following non-bitfield members are ignored. 2499 if (getASTContext().ZeroBitfieldFollowsNonBitfield((*I), LastFD)) { 2500 --Index; 2501 continue; 2502 } 2503 LastFD = (*I); 2504 } 2505 } 2506 2507 assert(CachedFieldIndex && "failed to find field in parent"); 2508 return CachedFieldIndex - 1; 2509} 2510 2511SourceRange FieldDecl::getSourceRange() const { 2512 if (const Expr *E = InitializerOrBitWidth.getPointer()) 2513 return SourceRange(getInnerLocStart(), E->getLocEnd()); 2514 return DeclaratorDecl::getSourceRange(); 2515} 2516 2517void FieldDecl::setInClassInitializer(Expr *Init) { 2518 assert(!InitializerOrBitWidth.getPointer() && 2519 "bit width or initializer already set"); 2520 InitializerOrBitWidth.setPointer(Init); 2521 InitializerOrBitWidth.setInt(0); 2522} 2523 2524//===----------------------------------------------------------------------===// 2525// TagDecl Implementation 2526//===----------------------------------------------------------------------===// 2527 2528SourceLocation TagDecl::getOuterLocStart() const { 2529 return getTemplateOrInnerLocStart(this); 2530} 2531 2532SourceRange TagDecl::getSourceRange() const { 2533 SourceLocation E = RBraceLoc.isValid() ? RBraceLoc : getLocation(); 2534 return SourceRange(getOuterLocStart(), E); 2535} 2536 2537TagDecl* TagDecl::getCanonicalDecl() { 2538 return getFirstDeclaration(); 2539} 2540 2541void TagDecl::setTypedefNameForAnonDecl(TypedefNameDecl *TDD) { 2542 TypedefNameDeclOrQualifier = TDD; 2543 if (TypeForDecl) 2544 const_cast<Type*>(TypeForDecl)->ClearLinkageCache(); 2545 ClearLinkageCache(); 2546} 2547 2548void TagDecl::startDefinition() { 2549 IsBeingDefined = true; 2550 2551 if (isa<CXXRecordDecl>(this)) { 2552 CXXRecordDecl *D = cast<CXXRecordDecl>(this); 2553 struct CXXRecordDecl::DefinitionData *Data = 2554 new (getASTContext()) struct CXXRecordDecl::DefinitionData(D); 2555 for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) 2556 cast<CXXRecordDecl>(*I)->DefinitionData = Data; 2557 } 2558} 2559 2560void TagDecl::completeDefinition() { 2561 assert((!isa<CXXRecordDecl>(this) || 2562 cast<CXXRecordDecl>(this)->hasDefinition()) && 2563 "definition completed but not started"); 2564 2565 IsCompleteDefinition = true; 2566 IsBeingDefined = false; 2567 2568 if (ASTMutationListener *L = getASTMutationListener()) 2569 L->CompletedTagDefinition(this); 2570} 2571 2572TagDecl *TagDecl::getDefinition() const { 2573 if (isCompleteDefinition()) 2574 return const_cast<TagDecl *>(this); 2575 if (const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(this)) 2576 return CXXRD->getDefinition(); 2577 2578 for (redecl_iterator R = redecls_begin(), REnd = redecls_end(); 2579 R != REnd; ++R) 2580 if (R->isCompleteDefinition()) 2581 return *R; 2582 2583 return 0; 2584} 2585 2586void TagDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) { 2587 if (QualifierLoc) { 2588 // Make sure the extended qualifier info is allocated. 2589 if (!hasExtInfo()) 2590 TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo; 2591 // Set qualifier info. 2592 getExtInfo()->QualifierLoc = QualifierLoc; 2593 } else { 2594 // Here Qualifier == 0, i.e., we are removing the qualifier (if any). 2595 if (hasExtInfo()) { 2596 if (getExtInfo()->NumTemplParamLists == 0) { 2597 getASTContext().Deallocate(getExtInfo()); 2598 TypedefNameDeclOrQualifier = (TypedefNameDecl*) 0; 2599 } 2600 else 2601 getExtInfo()->QualifierLoc = QualifierLoc; 2602 } 2603 } 2604} 2605 2606void TagDecl::setTemplateParameterListsInfo(ASTContext &Context, 2607 unsigned NumTPLists, 2608 TemplateParameterList **TPLists) { 2609 assert(NumTPLists > 0); 2610 // Make sure the extended decl info is allocated. 2611 if (!hasExtInfo()) 2612 // Allocate external info struct. 2613 TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo; 2614 // Set the template parameter lists info. 2615 getExtInfo()->setTemplateParameterListsInfo(Context, NumTPLists, TPLists); 2616} 2617 2618//===----------------------------------------------------------------------===// 2619// EnumDecl Implementation 2620//===----------------------------------------------------------------------===// 2621 2622void EnumDecl::anchor() { } 2623 2624EnumDecl *EnumDecl::Create(ASTContext &C, DeclContext *DC, 2625 SourceLocation StartLoc, SourceLocation IdLoc, 2626 IdentifierInfo *Id, 2627 EnumDecl *PrevDecl, bool IsScoped, 2628 bool IsScopedUsingClassTag, bool IsFixed) { 2629 EnumDecl *Enum = new (C) EnumDecl(DC, StartLoc, IdLoc, Id, PrevDecl, 2630 IsScoped, IsScopedUsingClassTag, IsFixed); 2631 C.getTypeDeclType(Enum, PrevDecl); 2632 return Enum; 2633} 2634 2635EnumDecl *EnumDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 2636 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(EnumDecl)); 2637 return new (Mem) EnumDecl(0, SourceLocation(), SourceLocation(), 0, 0, 2638 false, false, false); 2639} 2640 2641void EnumDecl::completeDefinition(QualType NewType, 2642 QualType NewPromotionType, 2643 unsigned NumPositiveBits, 2644 unsigned NumNegativeBits) { 2645 assert(!isCompleteDefinition() && "Cannot redefine enums!"); 2646 if (!IntegerType) 2647 IntegerType = NewType.getTypePtr(); 2648 PromotionType = NewPromotionType; 2649 setNumPositiveBits(NumPositiveBits); 2650 setNumNegativeBits(NumNegativeBits); 2651 TagDecl::completeDefinition(); 2652} 2653 2654TemplateSpecializationKind EnumDecl::getTemplateSpecializationKind() const { 2655 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) 2656 return MSI->getTemplateSpecializationKind(); 2657 2658 return TSK_Undeclared; 2659} 2660 2661void EnumDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK, 2662 SourceLocation PointOfInstantiation) { 2663 MemberSpecializationInfo *MSI = getMemberSpecializationInfo(); 2664 assert(MSI && "Not an instantiated member enumeration?"); 2665 MSI->setTemplateSpecializationKind(TSK); 2666 if (TSK != TSK_ExplicitSpecialization && 2667 PointOfInstantiation.isValid() && 2668 MSI->getPointOfInstantiation().isInvalid()) 2669 MSI->setPointOfInstantiation(PointOfInstantiation); 2670} 2671 2672EnumDecl *EnumDecl::getInstantiatedFromMemberEnum() const { 2673 if (SpecializationInfo) 2674 return cast<EnumDecl>(SpecializationInfo->getInstantiatedFrom()); 2675 2676 return 0; 2677} 2678 2679void EnumDecl::setInstantiationOfMemberEnum(ASTContext &C, EnumDecl *ED, 2680 TemplateSpecializationKind TSK) { 2681 assert(!SpecializationInfo && "Member enum is already a specialization"); 2682 SpecializationInfo = new (C) MemberSpecializationInfo(ED, TSK); 2683} 2684 2685//===----------------------------------------------------------------------===// 2686// RecordDecl Implementation 2687//===----------------------------------------------------------------------===// 2688 2689RecordDecl::RecordDecl(Kind DK, TagKind TK, DeclContext *DC, 2690 SourceLocation StartLoc, SourceLocation IdLoc, 2691 IdentifierInfo *Id, RecordDecl *PrevDecl) 2692 : TagDecl(DK, TK, DC, IdLoc, Id, PrevDecl, StartLoc) { 2693 HasFlexibleArrayMember = false; 2694 AnonymousStructOrUnion = false; 2695 HasObjectMember = false; 2696 LoadedFieldsFromExternalStorage = false; 2697 assert(classof(static_cast<Decl*>(this)) && "Invalid Kind!"); 2698} 2699 2700RecordDecl *RecordDecl::Create(const ASTContext &C, TagKind TK, DeclContext *DC, 2701 SourceLocation StartLoc, SourceLocation IdLoc, 2702 IdentifierInfo *Id, RecordDecl* PrevDecl) { 2703 RecordDecl* R = new (C) RecordDecl(Record, TK, DC, StartLoc, IdLoc, Id, 2704 PrevDecl); 2705 C.getTypeDeclType(R, PrevDecl); 2706 return R; 2707} 2708 2709RecordDecl *RecordDecl::CreateDeserialized(const ASTContext &C, unsigned ID) { 2710 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(RecordDecl)); 2711 return new (Mem) RecordDecl(Record, TTK_Struct, 0, SourceLocation(), 2712 SourceLocation(), 0, 0); 2713} 2714 2715bool RecordDecl::isInjectedClassName() const { 2716 return isImplicit() && getDeclName() && getDeclContext()->isRecord() && 2717 cast<RecordDecl>(getDeclContext())->getDeclName() == getDeclName(); 2718} 2719 2720RecordDecl::field_iterator RecordDecl::field_begin() const { 2721 if (hasExternalLexicalStorage() && !LoadedFieldsFromExternalStorage) 2722 LoadFieldsFromExternalStorage(); 2723 2724 return field_iterator(decl_iterator(FirstDecl)); 2725} 2726 2727/// completeDefinition - Notes that the definition of this type is now 2728/// complete. 2729void RecordDecl::completeDefinition() { 2730 assert(!isCompleteDefinition() && "Cannot redefine record!"); 2731 TagDecl::completeDefinition(); 2732} 2733 2734void RecordDecl::LoadFieldsFromExternalStorage() const { 2735 ExternalASTSource *Source = getASTContext().getExternalSource(); 2736 assert(hasExternalLexicalStorage() && Source && "No external storage?"); 2737 2738 // Notify that we have a RecordDecl doing some initialization. 2739 ExternalASTSource::Deserializing TheFields(Source); 2740 2741 SmallVector<Decl*, 64> Decls; 2742 LoadedFieldsFromExternalStorage = true; 2743 switch (Source->FindExternalLexicalDeclsBy<FieldDecl>(this, Decls)) { 2744 case ELR_Success: 2745 break; 2746 2747 case ELR_AlreadyLoaded: 2748 case ELR_Failure: 2749 return; 2750 } 2751 2752#ifndef NDEBUG 2753 // Check that all decls we got were FieldDecls. 2754 for (unsigned i=0, e=Decls.size(); i != e; ++i) 2755 assert(isa<FieldDecl>(Decls[i])); 2756#endif 2757 2758 if (Decls.empty()) 2759 return; 2760 2761 llvm::tie(FirstDecl, LastDecl) = BuildDeclChain(Decls, 2762 /*FieldsAlreadyLoaded=*/false); 2763} 2764 2765//===----------------------------------------------------------------------===// 2766// BlockDecl Implementation 2767//===----------------------------------------------------------------------===// 2768 2769void BlockDecl::setParams(llvm::ArrayRef<ParmVarDecl *> NewParamInfo) { 2770 assert(ParamInfo == 0 && "Already has param info!"); 2771 2772 // Zero params -> null pointer. 2773 if (!NewParamInfo.empty()) { 2774 NumParams = NewParamInfo.size(); 2775 ParamInfo = new (getASTContext()) ParmVarDecl*[NewParamInfo.size()]; 2776 std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo); 2777 } 2778} 2779 2780void BlockDecl::setCaptures(ASTContext &Context, 2781 const Capture *begin, 2782 const Capture *end, 2783 bool capturesCXXThis) { 2784 CapturesCXXThis = capturesCXXThis; 2785 2786 if (begin == end) { 2787 NumCaptures = 0; 2788 Captures = 0; 2789 return; 2790 } 2791 2792 NumCaptures = end - begin; 2793 2794 // Avoid new Capture[] because we don't want to provide a default 2795 // constructor. 2796 size_t allocationSize = NumCaptures * sizeof(Capture); 2797 void *buffer = Context.Allocate(allocationSize, /*alignment*/sizeof(void*)); 2798 memcpy(buffer, begin, allocationSize); 2799 Captures = static_cast<Capture*>(buffer); 2800} 2801 2802bool BlockDecl::capturesVariable(const VarDecl *variable) const { 2803 for (capture_const_iterator 2804 i = capture_begin(), e = capture_end(); i != e; ++i) 2805 // Only auto vars can be captured, so no redeclaration worries. 2806 if (i->getVariable() == variable) 2807 return true; 2808 2809 return false; 2810} 2811 2812SourceRange BlockDecl::getSourceRange() const { 2813 return SourceRange(getLocation(), Body? Body->getLocEnd() : getLocation()); 2814} 2815 2816//===----------------------------------------------------------------------===// 2817// Other Decl Allocation/Deallocation Method Implementations 2818//===----------------------------------------------------------------------===// 2819 2820void TranslationUnitDecl::anchor() { } 2821 2822TranslationUnitDecl *TranslationUnitDecl::Create(ASTContext &C) { 2823 return new (C) TranslationUnitDecl(C); 2824} 2825 2826void LabelDecl::anchor() { } 2827 2828LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC, 2829 SourceLocation IdentL, IdentifierInfo *II) { 2830 return new (C) LabelDecl(DC, IdentL, II, 0, IdentL); 2831} 2832 2833LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC, 2834 SourceLocation IdentL, IdentifierInfo *II, 2835 SourceLocation GnuLabelL) { 2836 assert(GnuLabelL != IdentL && "Use this only for GNU local labels"); 2837 return new (C) LabelDecl(DC, IdentL, II, 0, GnuLabelL); 2838} 2839 2840LabelDecl *LabelDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 2841 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(LabelDecl)); 2842 return new (Mem) LabelDecl(0, SourceLocation(), 0, 0, SourceLocation()); 2843} 2844 2845void ValueDecl::anchor() { } 2846 2847void ImplicitParamDecl::anchor() { } 2848 2849ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, DeclContext *DC, 2850 SourceLocation IdLoc, 2851 IdentifierInfo *Id, 2852 QualType Type) { 2853 return new (C) ImplicitParamDecl(DC, IdLoc, Id, Type); 2854} 2855 2856ImplicitParamDecl *ImplicitParamDecl::CreateDeserialized(ASTContext &C, 2857 unsigned ID) { 2858 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(ImplicitParamDecl)); 2859 return new (Mem) ImplicitParamDecl(0, SourceLocation(), 0, QualType()); 2860} 2861 2862FunctionDecl *FunctionDecl::Create(ASTContext &C, DeclContext *DC, 2863 SourceLocation StartLoc, 2864 const DeclarationNameInfo &NameInfo, 2865 QualType T, TypeSourceInfo *TInfo, 2866 StorageClass SC, StorageClass SCAsWritten, 2867 bool isInlineSpecified, 2868 bool hasWrittenPrototype, 2869 bool isConstexprSpecified) { 2870 FunctionDecl *New = new (C) FunctionDecl(Function, DC, StartLoc, NameInfo, 2871 T, TInfo, SC, SCAsWritten, 2872 isInlineSpecified, 2873 isConstexprSpecified); 2874 New->HasWrittenPrototype = hasWrittenPrototype; 2875 return New; 2876} 2877 2878FunctionDecl *FunctionDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 2879 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(FunctionDecl)); 2880 return new (Mem) FunctionDecl(Function, 0, SourceLocation(), 2881 DeclarationNameInfo(), QualType(), 0, 2882 SC_None, SC_None, false, false); 2883} 2884 2885BlockDecl *BlockDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) { 2886 return new (C) BlockDecl(DC, L); 2887} 2888 2889BlockDecl *BlockDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 2890 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(BlockDecl)); 2891 return new (Mem) BlockDecl(0, SourceLocation()); 2892} 2893 2894EnumConstantDecl *EnumConstantDecl::Create(ASTContext &C, EnumDecl *CD, 2895 SourceLocation L, 2896 IdentifierInfo *Id, QualType T, 2897 Expr *E, const llvm::APSInt &V) { 2898 return new (C) EnumConstantDecl(CD, L, Id, T, E, V); 2899} 2900 2901EnumConstantDecl * 2902EnumConstantDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 2903 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(EnumConstantDecl)); 2904 return new (Mem) EnumConstantDecl(0, SourceLocation(), 0, QualType(), 0, 2905 llvm::APSInt()); 2906} 2907 2908void IndirectFieldDecl::anchor() { } 2909 2910IndirectFieldDecl * 2911IndirectFieldDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L, 2912 IdentifierInfo *Id, QualType T, NamedDecl **CH, 2913 unsigned CHS) { 2914 return new (C) IndirectFieldDecl(DC, L, Id, T, CH, CHS); 2915} 2916 2917IndirectFieldDecl *IndirectFieldDecl::CreateDeserialized(ASTContext &C, 2918 unsigned ID) { 2919 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(IndirectFieldDecl)); 2920 return new (Mem) IndirectFieldDecl(0, SourceLocation(), DeclarationName(), 2921 QualType(), 0, 0); 2922} 2923 2924SourceRange EnumConstantDecl::getSourceRange() const { 2925 SourceLocation End = getLocation(); 2926 if (Init) 2927 End = Init->getLocEnd(); 2928 return SourceRange(getLocation(), End); 2929} 2930 2931void TypeDecl::anchor() { } 2932 2933TypedefDecl *TypedefDecl::Create(ASTContext &C, DeclContext *DC, 2934 SourceLocation StartLoc, SourceLocation IdLoc, 2935 IdentifierInfo *Id, TypeSourceInfo *TInfo) { 2936 return new (C) TypedefDecl(DC, StartLoc, IdLoc, Id, TInfo); 2937} 2938 2939void TypedefNameDecl::anchor() { } 2940 2941TypedefDecl *TypedefDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 2942 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(TypedefDecl)); 2943 return new (Mem) TypedefDecl(0, SourceLocation(), SourceLocation(), 0, 0); 2944} 2945 2946TypeAliasDecl *TypeAliasDecl::Create(ASTContext &C, DeclContext *DC, 2947 SourceLocation StartLoc, 2948 SourceLocation IdLoc, IdentifierInfo *Id, 2949 TypeSourceInfo *TInfo) { 2950 return new (C) TypeAliasDecl(DC, StartLoc, IdLoc, Id, TInfo); 2951} 2952 2953TypeAliasDecl *TypeAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) { 2954 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(TypeAliasDecl)); 2955 return new (Mem) TypeAliasDecl(0, SourceLocation(), SourceLocation(), 0, 0); 2956} 2957 2958SourceRange TypedefDecl::getSourceRange() const { 2959 SourceLocation RangeEnd = getLocation(); 2960 if (TypeSourceInfo *TInfo = getTypeSourceInfo()) { 2961 if (typeIsPostfix(TInfo->getType())) 2962 RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd(); 2963 } 2964 return SourceRange(getLocStart(), RangeEnd); 2965} 2966 2967SourceRange TypeAliasDecl::getSourceRange() const { 2968 SourceLocation RangeEnd = getLocStart(); 2969 if (TypeSourceInfo *TInfo = getTypeSourceInfo()) 2970 RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd(); 2971 return SourceRange(getLocStart(), RangeEnd); 2972} 2973 2974void FileScopeAsmDecl::anchor() { } 2975 2976FileScopeAsmDecl *FileScopeAsmDecl::Create(ASTContext &C, DeclContext *DC, 2977 StringLiteral *Str, 2978 SourceLocation AsmLoc, 2979 SourceLocation RParenLoc) { 2980 return new (C) FileScopeAsmDecl(DC, Str, AsmLoc, RParenLoc); 2981} 2982 2983FileScopeAsmDecl *FileScopeAsmDecl::CreateDeserialized(ASTContext &C, 2984 unsigned ID) { 2985 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(FileScopeAsmDecl)); 2986 return new (Mem) FileScopeAsmDecl(0, 0, SourceLocation(), SourceLocation()); 2987} 2988 2989//===----------------------------------------------------------------------===// 2990// ImportDecl Implementation 2991//===----------------------------------------------------------------------===// 2992 2993/// \brief Retrieve the number of module identifiers needed to name the given 2994/// module. 2995static unsigned getNumModuleIdentifiers(Module *Mod) { 2996 unsigned Result = 1; 2997 while (Mod->Parent) { 2998 Mod = Mod->Parent; 2999 ++Result; 3000 } 3001 return Result; 3002} 3003 3004ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc, 3005 Module *Imported, 3006 ArrayRef<SourceLocation> IdentifierLocs) 3007 : Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, true), 3008 NextLocalImport() 3009{ 3010 assert(getNumModuleIdentifiers(Imported) == IdentifierLocs.size()); 3011 SourceLocation *StoredLocs = reinterpret_cast<SourceLocation *>(this + 1); 3012 memcpy(StoredLocs, IdentifierLocs.data(), 3013 IdentifierLocs.size() * sizeof(SourceLocation)); 3014} 3015 3016ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc, 3017 Module *Imported, SourceLocation EndLoc) 3018 : Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, false), 3019 NextLocalImport() 3020{ 3021 *reinterpret_cast<SourceLocation *>(this + 1) = EndLoc; 3022} 3023 3024ImportDecl *ImportDecl::Create(ASTContext &C, DeclContext *DC, 3025 SourceLocation StartLoc, Module *Imported, 3026 ArrayRef<SourceLocation> IdentifierLocs) { 3027 void *Mem = C.Allocate(sizeof(ImportDecl) + 3028 IdentifierLocs.size() * sizeof(SourceLocation)); 3029 return new (Mem) ImportDecl(DC, StartLoc, Imported, IdentifierLocs); 3030} 3031 3032ImportDecl *ImportDecl::CreateImplicit(ASTContext &C, DeclContext *DC, 3033 SourceLocation StartLoc, 3034 Module *Imported, 3035 SourceLocation EndLoc) { 3036 void *Mem = C.Allocate(sizeof(ImportDecl) + sizeof(SourceLocation)); 3037 ImportDecl *Import = new (Mem) ImportDecl(DC, StartLoc, Imported, EndLoc); 3038 Import->setImplicit(); 3039 return Import; 3040} 3041 3042ImportDecl *ImportDecl::CreateDeserialized(ASTContext &C, unsigned ID, 3043 unsigned NumLocations) { 3044 void *Mem = AllocateDeserializedDecl(C, ID, 3045 (sizeof(ImportDecl) + 3046 NumLocations * sizeof(SourceLocation))); 3047 return new (Mem) ImportDecl(EmptyShell()); 3048} 3049 3050ArrayRef<SourceLocation> ImportDecl::getIdentifierLocs() const { 3051 if (!ImportedAndComplete.getInt()) 3052 return ArrayRef<SourceLocation>(); 3053 3054 const SourceLocation *StoredLocs 3055 = reinterpret_cast<const SourceLocation *>(this + 1); 3056 return ArrayRef<SourceLocation>(StoredLocs, 3057 getNumModuleIdentifiers(getImportedModule())); 3058} 3059 3060SourceRange ImportDecl::getSourceRange() const { 3061 if (!ImportedAndComplete.getInt()) 3062 return SourceRange(getLocation(), 3063 *reinterpret_cast<const SourceLocation *>(this + 1)); 3064 3065 return SourceRange(getLocation(), getIdentifierLocs().back()); 3066} 3067