1 //===-- DeclarationName.cpp - Declaration names implementation --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the DeclarationName and DeclarationNameTable
13 //===----------------------------------------------------------------------===//
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/Decl.h"
16 #include "clang/AST/DeclarationName.h"
17 #include "clang/AST/Type.h"
18 #include "clang/AST/TypeLoc.h"
19 #include "clang/AST/TypeOrdering.h"
20 #include "clang/Basic/IdentifierTable.h"
21 #include "llvm/ADT/DenseMap.h"
22 #include "llvm/ADT/FoldingSet.h"
23 #include "llvm/Support/ErrorHandling.h"
24 #include "llvm/Support/raw_ostream.h"
25 using namespace clang;
28 /// CXXSpecialName - Records the type associated with one of the
29 /// "special" kinds of declaration names in C++, e.g., constructors,
30 /// destructors, and conversion functions.
32 : public DeclarationNameExtra, public llvm::FoldingSetNode {
34 /// Type - The type associated with this declaration name.
37 /// FETokenInfo - Extra information associated with this declaration
38 /// name that can be used by the front end.
41 void Profile(llvm::FoldingSetNodeID &ID) {
42 ID.AddInteger(ExtraKindOrNumArgs);
43 ID.AddPointer(Type.getAsOpaquePtr());
47 /// CXXOperatorIdName - Contains extra information for the name of an
48 /// overloaded operator in C++, such as "operator+.
49 class CXXOperatorIdName : public DeclarationNameExtra {
51 /// FETokenInfo - Extra information associated with this operator
52 /// name that can be used by the front end.
56 /// CXXLiteralOperatorName - Contains the actual identifier that makes up the
59 /// This identifier is stored here rather than directly in DeclarationName so as
60 /// to allow Objective-C selectors, which are about a million times more common,
61 /// to consume minimal memory.
62 class CXXLiteralOperatorIdName
63 : public DeclarationNameExtra, public llvm::FoldingSetNode {
67 /// FETokenInfo - Extra information associated with this operator
68 /// name that can be used by the front end.
71 void Profile(llvm::FoldingSetNodeID &FSID) {
76 static int compareInt(unsigned A, unsigned B) {
77 return (A < B ? -1 : (A > B ? 1 : 0));
80 int DeclarationName::compare(DeclarationName LHS, DeclarationName RHS) {
81 if (LHS.getNameKind() != RHS.getNameKind())
82 return (LHS.getNameKind() < RHS.getNameKind() ? -1 : 1);
84 switch (LHS.getNameKind()) {
85 case DeclarationName::Identifier: {
86 IdentifierInfo *LII = LHS.getAsIdentifierInfo();
87 IdentifierInfo *RII = RHS.getAsIdentifierInfo();
88 if (!LII) return RII ? -1 : 0;
91 return LII->getName().compare(RII->getName());
94 case DeclarationName::ObjCZeroArgSelector:
95 case DeclarationName::ObjCOneArgSelector:
96 case DeclarationName::ObjCMultiArgSelector: {
97 Selector LHSSelector = LHS.getObjCSelector();
98 Selector RHSSelector = RHS.getObjCSelector();
99 unsigned LN = LHSSelector.getNumArgs(), RN = RHSSelector.getNumArgs();
100 for (unsigned I = 0, N = std::min(LN, RN); I != N; ++I) {
101 switch (LHSSelector.getNameForSlot(I).compare(
102 RHSSelector.getNameForSlot(I))) {
103 case -1: return true;
104 case 1: return false;
109 return compareInt(LN, RN);
112 case DeclarationName::CXXConstructorName:
113 case DeclarationName::CXXDestructorName:
114 case DeclarationName::CXXConversionFunctionName:
115 if (QualTypeOrdering()(LHS.getCXXNameType(), RHS.getCXXNameType()))
117 if (QualTypeOrdering()(RHS.getCXXNameType(), LHS.getCXXNameType()))
121 case DeclarationName::CXXOperatorName:
122 return compareInt(LHS.getCXXOverloadedOperator(),
123 RHS.getCXXOverloadedOperator());
125 case DeclarationName::CXXLiteralOperatorName:
126 return LHS.getCXXLiteralIdentifier()->getName().compare(
127 RHS.getCXXLiteralIdentifier()->getName());
129 case DeclarationName::CXXUsingDirective:
133 llvm_unreachable("Invalid DeclarationName Kind!");
136 } // end namespace clang
138 DeclarationName::NameKind DeclarationName::getNameKind() const {
139 switch (getStoredNameKind()) {
140 case StoredIdentifier: return Identifier;
141 case StoredObjCZeroArgSelector: return ObjCZeroArgSelector;
142 case StoredObjCOneArgSelector: return ObjCOneArgSelector;
144 case StoredDeclarationNameExtra:
145 switch (getExtra()->ExtraKindOrNumArgs) {
146 case DeclarationNameExtra::CXXConstructor:
147 return CXXConstructorName;
149 case DeclarationNameExtra::CXXDestructor:
150 return CXXDestructorName;
152 case DeclarationNameExtra::CXXConversionFunction:
153 return CXXConversionFunctionName;
155 case DeclarationNameExtra::CXXLiteralOperator:
156 return CXXLiteralOperatorName;
158 case DeclarationNameExtra::CXXUsingDirective:
159 return CXXUsingDirective;
162 // Check if we have one of the CXXOperator* enumeration values.
163 if (getExtra()->ExtraKindOrNumArgs <
164 DeclarationNameExtra::CXXUsingDirective)
165 return CXXOperatorName;
167 return ObjCMultiArgSelector;
171 // Can't actually get here.
172 llvm_unreachable("This should be unreachable!");
175 bool DeclarationName::isDependentName() const {
176 QualType T = getCXXNameType();
177 return !T.isNull() && T->isDependentType();
180 std::string DeclarationName::getAsString() const {
182 llvm::raw_string_ostream OS(Result);
187 void DeclarationName::printName(raw_ostream &OS) const {
188 switch (getNameKind()) {
190 if (const IdentifierInfo *II = getAsIdentifierInfo())
194 case ObjCZeroArgSelector:
195 case ObjCOneArgSelector:
196 case ObjCMultiArgSelector:
197 OS << getObjCSelector().getAsString();
200 case CXXConstructorName: {
201 QualType ClassType = getCXXNameType();
202 if (const RecordType *ClassRec = ClassType->getAs<RecordType>())
203 OS << *ClassRec->getDecl();
205 OS << ClassType.getAsString();
209 case CXXDestructorName: {
211 QualType Type = getCXXNameType();
212 if (const RecordType *Rec = Type->getAs<RecordType>())
213 OS << *Rec->getDecl();
215 OS << Type.getAsString();
219 case CXXOperatorName: {
220 static const char* const OperatorNames[NUM_OVERLOADED_OPERATORS] = {
222 #define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \
224 #include "clang/Basic/OperatorKinds.def"
226 const char *OpName = OperatorNames[getCXXOverloadedOperator()];
227 assert(OpName && "not an overloaded operator");
230 if (OpName[0] >= 'a' && OpName[0] <= 'z')
236 case CXXLiteralOperatorName:
237 OS << "operator \"\" " << getCXXLiteralIdentifier()->getName();
240 case CXXConversionFunctionName: {
242 QualType Type = getCXXNameType();
243 if (const RecordType *Rec = Type->getAs<RecordType>())
244 OS << *Rec->getDecl();
246 OS << Type.getAsString();
249 case CXXUsingDirective:
250 OS << "<using-directive>";
254 llvm_unreachable("Unexpected declaration name kind");
257 QualType DeclarationName::getCXXNameType() const {
258 if (CXXSpecialName *CXXName = getAsCXXSpecialName())
259 return CXXName->Type;
264 OverloadedOperatorKind DeclarationName::getCXXOverloadedOperator() const {
265 if (CXXOperatorIdName *CXXOp = getAsCXXOperatorIdName()) {
267 = CXXOp->ExtraKindOrNumArgs - DeclarationNameExtra::CXXConversionFunction;
268 return static_cast<OverloadedOperatorKind>(value);
274 IdentifierInfo *DeclarationName::getCXXLiteralIdentifier() const {
275 if (CXXLiteralOperatorIdName *CXXLit = getAsCXXLiteralOperatorIdName())
281 void *DeclarationName::getFETokenInfoAsVoidSlow() const {
282 switch (getNameKind()) {
284 llvm_unreachable("Handled by getFETokenInfo()");
286 case CXXConstructorName:
287 case CXXDestructorName:
288 case CXXConversionFunctionName:
289 return getAsCXXSpecialName()->FETokenInfo;
291 case CXXOperatorName:
292 return getAsCXXOperatorIdName()->FETokenInfo;
294 case CXXLiteralOperatorName:
295 return getAsCXXLiteralOperatorIdName()->FETokenInfo;
298 llvm_unreachable("Declaration name has no FETokenInfo");
302 void DeclarationName::setFETokenInfo(void *T) {
303 switch (getNameKind()) {
305 getAsIdentifierInfo()->setFETokenInfo(T);
308 case CXXConstructorName:
309 case CXXDestructorName:
310 case CXXConversionFunctionName:
311 getAsCXXSpecialName()->FETokenInfo = T;
314 case CXXOperatorName:
315 getAsCXXOperatorIdName()->FETokenInfo = T;
318 case CXXLiteralOperatorName:
319 getAsCXXLiteralOperatorIdName()->FETokenInfo = T;
323 llvm_unreachable("Declaration name has no FETokenInfo");
327 DeclarationName DeclarationName::getUsingDirectiveName() {
328 // Single instance of DeclarationNameExtra for using-directive
329 static const DeclarationNameExtra UDirExtra =
330 { DeclarationNameExtra::CXXUsingDirective };
332 uintptr_t Ptr = reinterpret_cast<uintptr_t>(&UDirExtra);
333 Ptr |= StoredDeclarationNameExtra;
335 return DeclarationName(Ptr);
338 void DeclarationName::dump() const {
339 printName(llvm::errs());
340 llvm::errs() << '\n';
343 DeclarationNameTable::DeclarationNameTable(const ASTContext &C) : Ctx(C) {
344 CXXSpecialNamesImpl = new llvm::FoldingSet<CXXSpecialName>;
345 CXXLiteralOperatorNames = new llvm::FoldingSet<CXXLiteralOperatorIdName>;
347 // Initialize the overloaded operator names.
348 CXXOperatorNames = new (Ctx) CXXOperatorIdName[NUM_OVERLOADED_OPERATORS];
349 for (unsigned Op = 0; Op < NUM_OVERLOADED_OPERATORS; ++Op) {
350 CXXOperatorNames[Op].ExtraKindOrNumArgs
351 = Op + DeclarationNameExtra::CXXConversionFunction;
352 CXXOperatorNames[Op].FETokenInfo = 0;
356 DeclarationNameTable::~DeclarationNameTable() {
357 llvm::FoldingSet<CXXSpecialName> *SpecialNames =
358 static_cast<llvm::FoldingSet<CXXSpecialName>*>(CXXSpecialNamesImpl);
359 llvm::FoldingSet<CXXLiteralOperatorIdName> *LiteralNames
360 = static_cast<llvm::FoldingSet<CXXLiteralOperatorIdName>*>
361 (CXXLiteralOperatorNames);
367 DeclarationName DeclarationNameTable::getCXXConstructorName(CanQualType Ty) {
368 return getCXXSpecialName(DeclarationName::CXXConstructorName,
369 Ty.getUnqualifiedType());
372 DeclarationName DeclarationNameTable::getCXXDestructorName(CanQualType Ty) {
373 return getCXXSpecialName(DeclarationName::CXXDestructorName,
374 Ty.getUnqualifiedType());
378 DeclarationNameTable::getCXXConversionFunctionName(CanQualType Ty) {
379 return getCXXSpecialName(DeclarationName::CXXConversionFunctionName, Ty);
383 DeclarationNameTable::getCXXSpecialName(DeclarationName::NameKind Kind,
385 assert(Kind >= DeclarationName::CXXConstructorName &&
386 Kind <= DeclarationName::CXXConversionFunctionName &&
387 "Kind must be a C++ special name kind");
388 llvm::FoldingSet<CXXSpecialName> *SpecialNames
389 = static_cast<llvm::FoldingSet<CXXSpecialName>*>(CXXSpecialNamesImpl);
391 DeclarationNameExtra::ExtraKind EKind;
393 case DeclarationName::CXXConstructorName:
394 EKind = DeclarationNameExtra::CXXConstructor;
395 assert(!Ty.hasQualifiers() &&"Constructor type must be unqualified");
397 case DeclarationName::CXXDestructorName:
398 EKind = DeclarationNameExtra::CXXDestructor;
399 assert(!Ty.hasQualifiers() && "Destructor type must be unqualified");
401 case DeclarationName::CXXConversionFunctionName:
402 EKind = DeclarationNameExtra::CXXConversionFunction;
405 return DeclarationName();
408 // Unique selector, to guarantee there is one per name.
409 llvm::FoldingSetNodeID ID;
410 ID.AddInteger(EKind);
411 ID.AddPointer(Ty.getAsOpaquePtr());
414 if (CXXSpecialName *Name = SpecialNames->FindNodeOrInsertPos(ID, InsertPos))
415 return DeclarationName(Name);
417 CXXSpecialName *SpecialName = new (Ctx) CXXSpecialName;
418 SpecialName->ExtraKindOrNumArgs = EKind;
419 SpecialName->Type = Ty;
420 SpecialName->FETokenInfo = 0;
422 SpecialNames->InsertNode(SpecialName, InsertPos);
423 return DeclarationName(SpecialName);
427 DeclarationNameTable::getCXXOperatorName(OverloadedOperatorKind Op) {
428 return DeclarationName(&CXXOperatorNames[(unsigned)Op]);
432 DeclarationNameTable::getCXXLiteralOperatorName(IdentifierInfo *II) {
433 llvm::FoldingSet<CXXLiteralOperatorIdName> *LiteralNames
434 = static_cast<llvm::FoldingSet<CXXLiteralOperatorIdName>*>
435 (CXXLiteralOperatorNames);
437 llvm::FoldingSetNodeID ID;
441 if (CXXLiteralOperatorIdName *Name =
442 LiteralNames->FindNodeOrInsertPos(ID, InsertPos))
443 return DeclarationName (Name);
445 CXXLiteralOperatorIdName *LiteralName = new (Ctx) CXXLiteralOperatorIdName;
446 LiteralName->ExtraKindOrNumArgs = DeclarationNameExtra::CXXLiteralOperator;
447 LiteralName->ID = II;
448 LiteralName->FETokenInfo = 0;
450 LiteralNames->InsertNode(LiteralName, InsertPos);
451 return DeclarationName(LiteralName);
454 DeclarationNameLoc::DeclarationNameLoc(DeclarationName Name) {
455 switch (Name.getNameKind()) {
456 case DeclarationName::Identifier:
458 case DeclarationName::CXXConstructorName:
459 case DeclarationName::CXXDestructorName:
460 case DeclarationName::CXXConversionFunctionName:
463 case DeclarationName::CXXOperatorName:
464 CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding();
465 CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding();
467 case DeclarationName::CXXLiteralOperatorName:
468 CXXLiteralOperatorName.OpNameLoc = SourceLocation().getRawEncoding();
470 case DeclarationName::ObjCZeroArgSelector:
471 case DeclarationName::ObjCOneArgSelector:
472 case DeclarationName::ObjCMultiArgSelector:
475 case DeclarationName::CXXUsingDirective:
480 bool DeclarationNameInfo::containsUnexpandedParameterPack() const {
481 switch (Name.getNameKind()) {
482 case DeclarationName::Identifier:
483 case DeclarationName::ObjCZeroArgSelector:
484 case DeclarationName::ObjCOneArgSelector:
485 case DeclarationName::ObjCMultiArgSelector:
486 case DeclarationName::CXXOperatorName:
487 case DeclarationName::CXXLiteralOperatorName:
488 case DeclarationName::CXXUsingDirective:
491 case DeclarationName::CXXConstructorName:
492 case DeclarationName::CXXDestructorName:
493 case DeclarationName::CXXConversionFunctionName:
494 if (TypeSourceInfo *TInfo = LocInfo.NamedType.TInfo)
495 return TInfo->getType()->containsUnexpandedParameterPack();
497 return Name.getCXXNameType()->containsUnexpandedParameterPack();
499 llvm_unreachable("All name kinds handled.");
502 bool DeclarationNameInfo::isInstantiationDependent() const {
503 switch (Name.getNameKind()) {
504 case DeclarationName::Identifier:
505 case DeclarationName::ObjCZeroArgSelector:
506 case DeclarationName::ObjCOneArgSelector:
507 case DeclarationName::ObjCMultiArgSelector:
508 case DeclarationName::CXXOperatorName:
509 case DeclarationName::CXXLiteralOperatorName:
510 case DeclarationName::CXXUsingDirective:
513 case DeclarationName::CXXConstructorName:
514 case DeclarationName::CXXDestructorName:
515 case DeclarationName::CXXConversionFunctionName:
516 if (TypeSourceInfo *TInfo = LocInfo.NamedType.TInfo)
517 return TInfo->getType()->isInstantiationDependentType();
519 return Name.getCXXNameType()->isInstantiationDependentType();
521 llvm_unreachable("All name kinds handled.");
524 std::string DeclarationNameInfo::getAsString() const {
526 llvm::raw_string_ostream OS(Result);
531 void DeclarationNameInfo::printName(raw_ostream &OS) const {
532 switch (Name.getNameKind()) {
533 case DeclarationName::Identifier:
534 case DeclarationName::ObjCZeroArgSelector:
535 case DeclarationName::ObjCOneArgSelector:
536 case DeclarationName::ObjCMultiArgSelector:
537 case DeclarationName::CXXOperatorName:
538 case DeclarationName::CXXLiteralOperatorName:
539 case DeclarationName::CXXUsingDirective:
543 case DeclarationName::CXXConstructorName:
544 case DeclarationName::CXXDestructorName:
545 case DeclarationName::CXXConversionFunctionName:
546 if (TypeSourceInfo *TInfo = LocInfo.NamedType.TInfo) {
547 if (Name.getNameKind() == DeclarationName::CXXDestructorName)
549 else if (Name.getNameKind() == DeclarationName::CXXConversionFunctionName)
551 OS << TInfo->getType().getAsString();
557 llvm_unreachable("Unexpected declaration name kind");
560 SourceLocation DeclarationNameInfo::getEndLoc() const {
561 switch (Name.getNameKind()) {
562 case DeclarationName::Identifier:
565 case DeclarationName::CXXOperatorName: {
566 unsigned raw = LocInfo.CXXOperatorName.EndOpNameLoc;
567 return SourceLocation::getFromRawEncoding(raw);
570 case DeclarationName::CXXLiteralOperatorName: {
571 unsigned raw = LocInfo.CXXLiteralOperatorName.OpNameLoc;
572 return SourceLocation::getFromRawEncoding(raw);
575 case DeclarationName::CXXConstructorName:
576 case DeclarationName::CXXDestructorName:
577 case DeclarationName::CXXConversionFunctionName:
578 if (TypeSourceInfo *TInfo = LocInfo.NamedType.TInfo)
579 return TInfo->getTypeLoc().getEndLoc();
583 // DNInfo work in progress: FIXME.
584 case DeclarationName::ObjCZeroArgSelector:
585 case DeclarationName::ObjCOneArgSelector:
586 case DeclarationName::ObjCMultiArgSelector:
587 case DeclarationName::CXXUsingDirective:
590 llvm_unreachable("Unexpected declaration name kind");