1 //===- TypeLoc.cpp - Type Source Info Wrapper -----------------------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file defines the TypeLoc subclasses implementations.
11 //===----------------------------------------------------------------------===//
13 #include "clang/AST/TypeLoc.h"
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/Expr.h"
16 #include "clang/AST/NestedNameSpecifier.h"
17 #include "clang/AST/TemplateBase.h"
18 #include "clang/AST/TemplateName.h"
19 #include "clang/AST/TypeLocVisitor.h"
20 #include "clang/Basic/SourceLocation.h"
21 #include "clang/Basic/Specifiers.h"
22 #include "llvm/Support/ErrorHandling.h"
23 #include "llvm/Support/MathExtras.h"
29 using namespace clang;
31 static const unsigned TypeLocMaxDataAlign = alignof(void *);
33 //===----------------------------------------------------------------------===//
34 // TypeLoc Implementation
35 //===----------------------------------------------------------------------===//
39 class TypeLocRanger : public TypeLocVisitor<TypeLocRanger, SourceRange> {
41 #define ABSTRACT_TYPELOC(CLASS, PARENT)
42 #define TYPELOC(CLASS, PARENT) \
43 SourceRange Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc) { \
44 return TyLoc.getLocalSourceRange(); \
46 #include "clang/AST/TypeLocNodes.def"
51 SourceRange TypeLoc::getLocalSourceRangeImpl(TypeLoc TL) {
52 if (TL.isNull()) return SourceRange();
53 return TypeLocRanger().Visit(TL);
58 class TypeAligner : public TypeLocVisitor<TypeAligner, unsigned> {
60 #define ABSTRACT_TYPELOC(CLASS, PARENT)
61 #define TYPELOC(CLASS, PARENT) \
62 unsigned Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc) { \
63 return TyLoc.getLocalDataAlignment(); \
65 #include "clang/AST/TypeLocNodes.def"
70 /// Returns the alignment of the type source info data block.
71 unsigned TypeLoc::getLocalAlignmentForType(QualType Ty) {
72 if (Ty.isNull()) return 1;
73 return TypeAligner().Visit(TypeLoc(Ty, nullptr));
78 class TypeSizer : public TypeLocVisitor<TypeSizer, unsigned> {
80 #define ABSTRACT_TYPELOC(CLASS, PARENT)
81 #define TYPELOC(CLASS, PARENT) \
82 unsigned Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc) { \
83 return TyLoc.getLocalDataSize(); \
85 #include "clang/AST/TypeLocNodes.def"
90 /// Returns the size of the type source info data block.
91 unsigned TypeLoc::getFullDataSizeForType(QualType Ty) {
93 TypeLoc TyLoc(Ty, nullptr);
94 unsigned MaxAlign = 1;
95 while (!TyLoc.isNull()) {
96 unsigned Align = getLocalAlignmentForType(TyLoc.getType());
97 MaxAlign = std::max(Align, MaxAlign);
98 Total = llvm::alignTo(Total, Align);
99 Total += TypeSizer().Visit(TyLoc);
100 TyLoc = TyLoc.getNextTypeLoc();
102 Total = llvm::alignTo(Total, MaxAlign);
108 class NextLoc : public TypeLocVisitor<NextLoc, TypeLoc> {
110 #define ABSTRACT_TYPELOC(CLASS, PARENT)
111 #define TYPELOC(CLASS, PARENT) \
112 TypeLoc Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc) { \
113 return TyLoc.getNextTypeLoc(); \
115 #include "clang/AST/TypeLocNodes.def"
120 /// Get the next TypeLoc pointed by this TypeLoc, e.g for "int*" the
121 /// TypeLoc is a PointerLoc and next TypeLoc is for "int".
122 TypeLoc TypeLoc::getNextTypeLocImpl(TypeLoc TL) {
123 return NextLoc().Visit(TL);
126 /// Initializes a type location, and all of its children
127 /// recursively, as if the entire tree had been written in the
129 void TypeLoc::initializeImpl(ASTContext &Context, TypeLoc TL,
130 SourceLocation Loc) {
132 switch (TL.getTypeLocClass()) {
133 #define ABSTRACT_TYPELOC(CLASS, PARENT)
134 #define TYPELOC(CLASS, PARENT) \
136 CLASS##TypeLoc TLCasted = TL.castAs<CLASS##TypeLoc>(); \
137 TLCasted.initializeLocal(Context, Loc); \
138 TL = TLCasted.getNextTypeLoc(); \
142 #include "clang/AST/TypeLocNodes.def"
149 class TypeLocCopier : public TypeLocVisitor<TypeLocCopier> {
153 TypeLocCopier(TypeLoc source) : Source(source) {}
155 #define ABSTRACT_TYPELOC(CLASS, PARENT)
156 #define TYPELOC(CLASS, PARENT) \
157 void Visit##CLASS##TypeLoc(CLASS##TypeLoc dest) { \
158 dest.copyLocal(Source.castAs<CLASS##TypeLoc>()); \
160 #include "clang/AST/TypeLocNodes.def"
165 void TypeLoc::copy(TypeLoc other) {
166 assert(getFullDataSize() == other.getFullDataSize());
168 // If both data pointers are aligned to the maximum alignment, we
169 // can memcpy because getFullDataSize() accurately reflects the
170 // layout of the data.
171 if (reinterpret_cast<uintptr_t>(Data) ==
172 llvm::alignTo(reinterpret_cast<uintptr_t>(Data),
173 TypeLocMaxDataAlign) &&
174 reinterpret_cast<uintptr_t>(other.Data) ==
175 llvm::alignTo(reinterpret_cast<uintptr_t>(other.Data),
176 TypeLocMaxDataAlign)) {
177 memcpy(Data, other.Data, getFullDataSize());
181 // Copy each of the pieces.
182 TypeLoc TL(getType(), Data);
184 TypeLocCopier(other).Visit(TL);
185 other = other.getNextTypeLoc();
186 } while ((TL = TL.getNextTypeLoc()));
189 SourceLocation TypeLoc::getBeginLoc() const {
191 TypeLoc LeftMost = Cur;
193 switch (Cur.getTypeLocClass()) {
198 if (Cur.castAs<FunctionProtoTypeLoc>().getTypePtr()
199 ->hasTrailingReturn()) {
204 case FunctionNoProto:
206 case DependentSizedArray:
207 case IncompleteArray:
209 // FIXME: Currently QualifiedTypeLoc does not have a source range
211 Cur = Cur.getNextTypeLoc();
214 if (Cur.getLocalSourceRange().getBegin().isValid())
216 Cur = Cur.getNextTypeLoc();
223 return LeftMost.getLocalSourceRange().getBegin();
226 SourceLocation TypeLoc::getEndLoc() const {
230 switch (Cur.getTypeLocClass()) {
234 return Last.getLocalSourceRange().getEnd();
237 case DependentSizedArray:
238 case IncompleteArray:
240 case FunctionNoProto:
244 if (Cur.castAs<FunctionProtoTypeLoc>().getTypePtr()->hasTrailingReturn())
252 case LValueReference:
253 case RValueReference:
262 Cur = Cur.getNextTypeLoc();
268 struct TSTChecker : public TypeLocVisitor<TSTChecker, bool> {
269 // Overload resolution does the real work for us.
270 static bool isTypeSpec(TypeSpecTypeLoc _) { return true; }
271 static bool isTypeSpec(TypeLoc _) { return false; }
273 #define ABSTRACT_TYPELOC(CLASS, PARENT)
274 #define TYPELOC(CLASS, PARENT) \
275 bool Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc) { \
276 return isTypeSpec(TyLoc); \
278 #include "clang/AST/TypeLocNodes.def"
283 /// Determines if the given type loc corresponds to a
284 /// TypeSpecTypeLoc. Since there is not actually a TypeSpecType in
285 /// the type hierarchy, this is made somewhat complicated.
287 /// There are a lot of types that currently use TypeSpecTypeLoc
288 /// because it's a convenient base class. Ideally we would not accept
289 /// those here, but ideally we would have better implementations for
291 bool TypeSpecTypeLoc::isKind(const TypeLoc &TL) {
292 if (TL.getType().hasLocalQualifiers()) return false;
293 return TSTChecker().Visit(TL);
296 // Reimplemented to account for GNU/C++ extension
297 // typeof unary-expression
298 // where there are no parentheses.
299 SourceRange TypeOfExprTypeLoc::getLocalSourceRange() const {
300 if (getRParenLoc().isValid())
301 return SourceRange(getTypeofLoc(), getRParenLoc());
303 return SourceRange(getTypeofLoc(),
304 getUnderlyingExpr()->getSourceRange().getEnd());
308 TypeSpecifierType BuiltinTypeLoc::getWrittenTypeSpec() const {
309 if (needsExtraLocalData())
310 return static_cast<TypeSpecifierType>(getWrittenBuiltinSpecs().Type);
311 switch (getTypePtr()->getKind()) {
312 case BuiltinType::Void:
314 case BuiltinType::Bool:
316 case BuiltinType::Char_U:
317 case BuiltinType::Char_S:
319 case BuiltinType::Char8:
321 case BuiltinType::Char16:
323 case BuiltinType::Char32:
325 case BuiltinType::WChar_S:
326 case BuiltinType::WChar_U:
328 case BuiltinType::UChar:
329 case BuiltinType::UShort:
330 case BuiltinType::UInt:
331 case BuiltinType::ULong:
332 case BuiltinType::ULongLong:
333 case BuiltinType::UInt128:
334 case BuiltinType::SChar:
335 case BuiltinType::Short:
336 case BuiltinType::Int:
337 case BuiltinType::Long:
338 case BuiltinType::LongLong:
339 case BuiltinType::Int128:
340 case BuiltinType::Half:
341 case BuiltinType::Float:
342 case BuiltinType::Double:
343 case BuiltinType::LongDouble:
344 case BuiltinType::Float16:
345 case BuiltinType::Float128:
346 case BuiltinType::ShortAccum:
347 case BuiltinType::Accum:
348 case BuiltinType::LongAccum:
349 case BuiltinType::UShortAccum:
350 case BuiltinType::UAccum:
351 case BuiltinType::ULongAccum:
352 case BuiltinType::ShortFract:
353 case BuiltinType::Fract:
354 case BuiltinType::LongFract:
355 case BuiltinType::UShortFract:
356 case BuiltinType::UFract:
357 case BuiltinType::ULongFract:
358 case BuiltinType::SatShortAccum:
359 case BuiltinType::SatAccum:
360 case BuiltinType::SatLongAccum:
361 case BuiltinType::SatUShortAccum:
362 case BuiltinType::SatUAccum:
363 case BuiltinType::SatULongAccum:
364 case BuiltinType::SatShortFract:
365 case BuiltinType::SatFract:
366 case BuiltinType::SatLongFract:
367 case BuiltinType::SatUShortFract:
368 case BuiltinType::SatUFract:
369 case BuiltinType::SatULongFract:
370 llvm_unreachable("Builtin type needs extra local data!");
371 // Fall through, if the impossible happens.
373 case BuiltinType::NullPtr:
374 case BuiltinType::Overload:
375 case BuiltinType::Dependent:
376 case BuiltinType::BoundMember:
377 case BuiltinType::UnknownAny:
378 case BuiltinType::ARCUnbridgedCast:
379 case BuiltinType::PseudoObject:
380 case BuiltinType::ObjCId:
381 case BuiltinType::ObjCClass:
382 case BuiltinType::ObjCSel:
383 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
384 case BuiltinType::Id:
385 #include "clang/Basic/OpenCLImageTypes.def"
386 #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
387 case BuiltinType::Id:
388 #include "clang/Basic/OpenCLExtensionTypes.def"
389 case BuiltinType::OCLSampler:
390 case BuiltinType::OCLEvent:
391 case BuiltinType::OCLClkEvent:
392 case BuiltinType::OCLQueue:
393 case BuiltinType::OCLReserveID:
394 case BuiltinType::BuiltinFn:
395 case BuiltinType::OMPArraySection:
396 return TST_unspecified;
399 llvm_unreachable("Invalid BuiltinType Kind!");
402 TypeLoc TypeLoc::IgnoreParensImpl(TypeLoc TL) {
403 while (ParenTypeLoc PTL = TL.getAs<ParenTypeLoc>())
404 TL = PTL.getInnerLoc();
408 SourceLocation TypeLoc::findNullabilityLoc() const {
409 if (auto ATL = getAs<AttributedTypeLoc>()) {
410 const Attr *A = ATL.getAttr();
411 if (A && (isa<TypeNullableAttr>(A) || isa<TypeNonNullAttr>(A) ||
412 isa<TypeNullUnspecifiedAttr>(A)))
413 return A->getLocation();
419 TypeLoc TypeLoc::findExplicitQualifierLoc() const {
421 if (auto qual = getAs<QualifiedTypeLoc>())
424 TypeLoc loc = IgnoreParens();
427 if (auto attr = loc.getAs<AttributedTypeLoc>()) {
428 if (attr.isQualifier()) return attr;
429 return attr.getModifiedLoc().findExplicitQualifierLoc();
432 // C11 _Atomic types.
433 if (auto atomic = loc.getAs<AtomicTypeLoc>()) {
440 void ObjCTypeParamTypeLoc::initializeLocal(ASTContext &Context,
441 SourceLocation Loc) {
443 if (!getNumProtocols()) return;
445 setProtocolLAngleLoc(Loc);
446 setProtocolRAngleLoc(Loc);
447 for (unsigned i = 0, e = getNumProtocols(); i != e; ++i)
448 setProtocolLoc(i, Loc);
451 void ObjCObjectTypeLoc::initializeLocal(ASTContext &Context,
452 SourceLocation Loc) {
453 setHasBaseTypeAsWritten(true);
454 setTypeArgsLAngleLoc(Loc);
455 setTypeArgsRAngleLoc(Loc);
456 for (unsigned i = 0, e = getNumTypeArgs(); i != e; ++i) {
458 Context.getTrivialTypeSourceInfo(
459 getTypePtr()->getTypeArgsAsWritten()[i], Loc));
461 setProtocolLAngleLoc(Loc);
462 setProtocolRAngleLoc(Loc);
463 for (unsigned i = 0, e = getNumProtocols(); i != e; ++i)
464 setProtocolLoc(i, Loc);
467 void TypeOfTypeLoc::initializeLocal(ASTContext &Context,
468 SourceLocation Loc) {
469 TypeofLikeTypeLoc<TypeOfTypeLoc, TypeOfType, TypeOfTypeLocInfo>
470 ::initializeLocal(Context, Loc);
471 this->getLocalData()->UnderlyingTInfo = Context.getTrivialTypeSourceInfo(
472 getUnderlyingType(), Loc);
475 void UnaryTransformTypeLoc::initializeLocal(ASTContext &Context,
476 SourceLocation Loc) {
480 this->setUnderlyingTInfo(
481 Context.getTrivialTypeSourceInfo(getTypePtr()->getBaseType(), Loc));
484 void ElaboratedTypeLoc::initializeLocal(ASTContext &Context,
485 SourceLocation Loc) {
486 setElaboratedKeywordLoc(Loc);
487 NestedNameSpecifierLocBuilder Builder;
488 Builder.MakeTrivial(Context, getTypePtr()->getQualifier(), Loc);
489 setQualifierLoc(Builder.getWithLocInContext(Context));
492 void DependentNameTypeLoc::initializeLocal(ASTContext &Context,
493 SourceLocation Loc) {
494 setElaboratedKeywordLoc(Loc);
495 NestedNameSpecifierLocBuilder Builder;
496 Builder.MakeTrivial(Context, getTypePtr()->getQualifier(), Loc);
497 setQualifierLoc(Builder.getWithLocInContext(Context));
502 DependentTemplateSpecializationTypeLoc::initializeLocal(ASTContext &Context,
503 SourceLocation Loc) {
504 setElaboratedKeywordLoc(Loc);
505 if (getTypePtr()->getQualifier()) {
506 NestedNameSpecifierLocBuilder Builder;
507 Builder.MakeTrivial(Context, getTypePtr()->getQualifier(), Loc);
508 setQualifierLoc(Builder.getWithLocInContext(Context));
510 setQualifierLoc(NestedNameSpecifierLoc());
512 setTemplateKeywordLoc(Loc);
513 setTemplateNameLoc(Loc);
516 TemplateSpecializationTypeLoc::initializeArgLocs(Context, getNumArgs(),
517 getTypePtr()->getArgs(),
521 void TemplateSpecializationTypeLoc::initializeArgLocs(ASTContext &Context,
523 const TemplateArgument *Args,
524 TemplateArgumentLocInfo *ArgInfos,
525 SourceLocation Loc) {
526 for (unsigned i = 0, e = NumArgs; i != e; ++i) {
527 switch (Args[i].getKind()) {
528 case TemplateArgument::Null:
529 llvm_unreachable("Impossible TemplateArgument");
531 case TemplateArgument::Integral:
532 case TemplateArgument::Declaration:
533 case TemplateArgument::NullPtr:
534 ArgInfos[i] = TemplateArgumentLocInfo();
537 case TemplateArgument::Expression:
538 ArgInfos[i] = TemplateArgumentLocInfo(Args[i].getAsExpr());
541 case TemplateArgument::Type:
542 ArgInfos[i] = TemplateArgumentLocInfo(
543 Context.getTrivialTypeSourceInfo(Args[i].getAsType(),
547 case TemplateArgument::Template:
548 case TemplateArgument::TemplateExpansion: {
549 NestedNameSpecifierLocBuilder Builder;
550 TemplateName Template = Args[i].getAsTemplateOrTemplatePattern();
551 if (DependentTemplateName *DTN = Template.getAsDependentTemplateName())
552 Builder.MakeTrivial(Context, DTN->getQualifier(), Loc);
553 else if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName())
554 Builder.MakeTrivial(Context, QTN->getQualifier(), Loc);
556 ArgInfos[i] = TemplateArgumentLocInfo(
557 Builder.getWithLocInContext(Context), Loc,
558 Args[i].getKind() == TemplateArgument::Template ? SourceLocation()
563 case TemplateArgument::Pack:
564 ArgInfos[i] = TemplateArgumentLocInfo();