1//===- TemplateBase.cpp - Common template AST class implementation --------===//
2//
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
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements common classes used throughout C++ template
10// representations.
11//
12//===----------------------------------------------------------------------===//
13
14#include "clang/AST/TemplateBase.h"
15#include "clang/AST/ASTContext.h"
16#include "clang/AST/Decl.h"
17#include "clang/AST/DeclBase.h"
18#include "clang/AST/DeclTemplate.h"
19#include "clang/AST/DependenceFlags.h"
20#include "clang/AST/Expr.h"
21#include "clang/AST/ExprCXX.h"
22#include "clang/AST/PrettyPrinter.h"
23#include "clang/AST/TemplateName.h"
24#include "clang/AST/Type.h"
25#include "clang/AST/TypeLoc.h"
26#include "clang/Basic/Diagnostic.h"
27#include "clang/Basic/LLVM.h"
28#include "clang/Basic/LangOptions.h"
29#include "clang/Basic/SourceLocation.h"
30#include "llvm/ADT/APSInt.h"
31#include "llvm/ADT/FoldingSet.h"
32#include "llvm/ADT/SmallString.h"
33#include "llvm/ADT/StringExtras.h"
34#include "llvm/ADT/StringRef.h"
35#include "llvm/Support/Casting.h"
36#include "llvm/Support/Compiler.h"
37#include "llvm/Support/ErrorHandling.h"
38#include "llvm/Support/raw_ostream.h"
39#include <cassert>
40#include <cstddef>
41#include <cstdint>
42#include <cstring>
43#include <optional>
44
45using namespace clang;
46
47/// Print a template integral argument value.
48///
49/// \param TemplArg the TemplateArgument instance to print.
50///
51/// \param Out the raw_ostream instance to use for printing.
52///
53/// \param Policy the printing policy for EnumConstantDecl printing.
54///
55/// \param IncludeType If set, ensure that the type of the expression printed
56/// matches the type of the template argument.
57static void printIntegral(const TemplateArgument &TemplArg, raw_ostream &Out,
58 const PrintingPolicy &Policy, bool IncludeType) {
59 const Type *T = TemplArg.getIntegralType().getTypePtr();
60 const llvm::APSInt &Val = TemplArg.getAsIntegral();
61
62 if (Policy.UseEnumerators) {
63 if (const EnumType *ET = T->getAs<EnumType>()) {
64 for (const EnumConstantDecl *ECD : ET->getDecl()->enumerators()) {
65 // In Sema::CheckTemplateArugment, enum template arguments value are
66 // extended to the size of the integer underlying the enum type. This
67 // may create a size difference between the enum value and template
68 // argument value, requiring isSameValue here instead of operator==.
69 if (llvm::APSInt::isSameValue(I1: ECD->getInitVal(), I2: Val)) {
70 ECD->printQualifiedName(Out, Policy);
71 return;
72 }
73 }
74 }
75 }
76
77 if (Policy.MSVCFormatting)
78 IncludeType = false;
79
80 if (T->isBooleanType()) {
81 if (!Policy.MSVCFormatting)
82 Out << (Val.getBoolValue() ? "true" : "false");
83 else
84 Out << Val;
85 } else if (T->isCharType()) {
86 if (IncludeType) {
87 if (T->isSpecificBuiltinType(K: BuiltinType::SChar))
88 Out << "(signed char)";
89 else if (T->isSpecificBuiltinType(K: BuiltinType::UChar))
90 Out << "(unsigned char)";
91 }
92 CharacterLiteral::print(val: Val.getZExtValue(), Kind: CharacterLiteralKind::Ascii,
93 OS&: Out);
94 } else if (T->isAnyCharacterType() && !Policy.MSVCFormatting) {
95 CharacterLiteralKind Kind;
96 if (T->isWideCharType())
97 Kind = CharacterLiteralKind::Wide;
98 else if (T->isChar8Type())
99 Kind = CharacterLiteralKind::UTF8;
100 else if (T->isChar16Type())
101 Kind = CharacterLiteralKind::UTF16;
102 else if (T->isChar32Type())
103 Kind = CharacterLiteralKind::UTF32;
104 else
105 Kind = CharacterLiteralKind::Ascii;
106 CharacterLiteral::print(val: Val.getExtValue(), Kind, OS&: Out);
107 } else if (IncludeType) {
108 if (const auto *BT = T->getAs<BuiltinType>()) {
109 switch (BT->getKind()) {
110 case BuiltinType::ULongLong:
111 Out << Val << "ULL";
112 break;
113 case BuiltinType::LongLong:
114 Out << Val << "LL";
115 break;
116 case BuiltinType::ULong:
117 Out << Val << "UL";
118 break;
119 case BuiltinType::Long:
120 Out << Val << "L";
121 break;
122 case BuiltinType::UInt:
123 Out << Val << "U";
124 break;
125 case BuiltinType::Int:
126 Out << Val;
127 break;
128 default:
129 Out << "(" << T->getCanonicalTypeInternal().getAsString(Policy) << ")"
130 << Val;
131 break;
132 }
133 } else
134 Out << "(" << T->getCanonicalTypeInternal().getAsString(Policy) << ")"
135 << Val;
136 } else
137 Out << Val;
138}
139
140static unsigned getArrayDepth(QualType type) {
141 unsigned count = 0;
142 while (const auto *arrayType = type->getAsArrayTypeUnsafe()) {
143 count++;
144 type = arrayType->getElementType();
145 }
146 return count;
147}
148
149static bool needsAmpersandOnTemplateArg(QualType paramType, QualType argType) {
150 // Generally, if the parameter type is a pointer, we must be taking the
151 // address of something and need a &. However, if the argument is an array,
152 // this could be implicit via array-to-pointer decay.
153 if (!paramType->isPointerType())
154 return paramType->isMemberPointerType();
155 if (argType->isArrayType())
156 return getArrayDepth(type: argType) == getArrayDepth(type: paramType->getPointeeType());
157 return true;
158}
159
160//===----------------------------------------------------------------------===//
161// TemplateArgument Implementation
162//===----------------------------------------------------------------------===//
163
164void TemplateArgument::initFromType(QualType T, bool IsNullPtr,
165 bool IsDefaulted) {
166 TypeOrValue.Kind = IsNullPtr ? NullPtr : Type;
167 TypeOrValue.IsDefaulted = IsDefaulted;
168 TypeOrValue.V = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr());
169}
170
171void TemplateArgument::initFromDeclaration(ValueDecl *D, QualType QT,
172 bool IsDefaulted) {
173 assert(D && "Expected decl");
174 DeclArg.Kind = Declaration;
175 DeclArg.IsDefaulted = IsDefaulted;
176 DeclArg.QT = QT.getAsOpaquePtr();
177 DeclArg.D = D;
178}
179
180void TemplateArgument::initFromIntegral(const ASTContext &Ctx,
181 const llvm::APSInt &Value,
182 QualType Type, bool IsDefaulted) {
183 Integer.Kind = Integral;
184 Integer.IsDefaulted = IsDefaulted;
185 // Copy the APSInt value into our decomposed form.
186 Integer.BitWidth = Value.getBitWidth();
187 Integer.IsUnsigned = Value.isUnsigned();
188 // If the value is large, we have to get additional memory from the ASTContext
189 unsigned NumWords = Value.getNumWords();
190 if (NumWords > 1) {
191 void *Mem = Ctx.Allocate(Size: NumWords * sizeof(uint64_t));
192 std::memcpy(dest: Mem, src: Value.getRawData(), n: NumWords * sizeof(uint64_t));
193 Integer.pVal = static_cast<uint64_t *>(Mem);
194 } else {
195 Integer.VAL = Value.getZExtValue();
196 }
197
198 Integer.Type = Type.getAsOpaquePtr();
199}
200
201void TemplateArgument::initFromStructural(const ASTContext &Ctx, QualType Type,
202 const APValue &V, bool IsDefaulted) {
203 Value.Kind = StructuralValue;
204 Value.IsDefaulted = IsDefaulted;
205 Value.Value = new (Ctx) APValue(V);
206 Ctx.addDestruction(Ptr: Value.Value);
207 Value.Type = Type.getAsOpaquePtr();
208}
209
210TemplateArgument::TemplateArgument(const ASTContext &Ctx,
211 const llvm::APSInt &Value, QualType Type,
212 bool IsDefaulted) {
213 initFromIntegral(Ctx, Value, Type, IsDefaulted);
214}
215
216static const ValueDecl *getAsSimpleValueDeclRef(const ASTContext &Ctx,
217 QualType T, const APValue &V) {
218 // Pointers to members are relatively easy.
219 if (V.isMemberPointer() && V.getMemberPointerPath().empty())
220 return V.getMemberPointerDecl();
221
222 // We model class non-type template parameters as their template parameter
223 // object declaration.
224 if (V.isStruct() || V.isUnion())
225 return Ctx.getTemplateParamObjectDecl(T, V);
226
227 // Pointers and references with an empty path use the special 'Declaration'
228 // representation.
229 if (V.isLValue() && V.hasLValuePath() && V.getLValuePath().empty() &&
230 !V.isLValueOnePastTheEnd())
231 return V.getLValueBase().dyn_cast<const ValueDecl *>();
232
233 // Everything else uses the 'structural' representation.
234 return nullptr;
235}
236
237TemplateArgument::TemplateArgument(const ASTContext &Ctx, QualType Type,
238 const APValue &V, bool IsDefaulted) {
239 if (Type->isIntegralOrEnumerationType() && V.isInt())
240 initFromIntegral(Ctx, Value: V.getInt(), Type, IsDefaulted);
241 else if ((V.isLValue() && V.isNullPointer()) ||
242 (V.isMemberPointer() && !V.getMemberPointerDecl()))
243 initFromType(T: Type, /*isNullPtr=*/IsNullPtr: true, IsDefaulted);
244 else if (const ValueDecl *VD = getAsSimpleValueDeclRef(Ctx, T: Type, V))
245 // FIXME: The Declaration form should expose a const ValueDecl*.
246 initFromDeclaration(D: const_cast<ValueDecl *>(VD), QT: Type, IsDefaulted);
247 else
248 initFromStructural(Ctx, Type, V, IsDefaulted);
249}
250
251TemplateArgument
252TemplateArgument::CreatePackCopy(ASTContext &Context,
253 ArrayRef<TemplateArgument> Args) {
254 if (Args.empty())
255 return getEmptyPack();
256
257 return TemplateArgument(Args.copy(A&: Context));
258}
259
260TemplateArgumentDependence TemplateArgument::getDependence() const {
261 auto Deps = TemplateArgumentDependence::None;
262 switch (getKind()) {
263 case Null:
264 llvm_unreachable("Should not have a NULL template argument");
265
266 case Type:
267 Deps = toTemplateArgumentDependence(D: getAsType()->getDependence());
268 if (isa<PackExpansionType>(Val: getAsType()))
269 Deps |= TemplateArgumentDependence::Dependent;
270 return Deps;
271
272 case Template:
273 return toTemplateArgumentDependence(D: getAsTemplate().getDependence());
274
275 case TemplateExpansion:
276 return TemplateArgumentDependence::Dependent |
277 TemplateArgumentDependence::Instantiation;
278
279 case Declaration: {
280 auto *DC = dyn_cast<DeclContext>(Val: getAsDecl());
281 if (!DC)
282 DC = getAsDecl()->getDeclContext();
283 if (DC->isDependentContext())
284 Deps = TemplateArgumentDependence::Dependent |
285 TemplateArgumentDependence::Instantiation;
286 return Deps;
287 }
288
289 case NullPtr:
290 case Integral:
291 case StructuralValue:
292 return TemplateArgumentDependence::None;
293
294 case Expression:
295 Deps = toTemplateArgumentDependence(D: getAsExpr()->getDependence());
296 if (isa<PackExpansionExpr>(Val: getAsExpr()))
297 Deps |= TemplateArgumentDependence::Dependent |
298 TemplateArgumentDependence::Instantiation;
299 return Deps;
300
301 case Pack:
302 for (const auto &P : pack_elements())
303 Deps |= P.getDependence();
304 return Deps;
305 }
306 llvm_unreachable("unhandled ArgKind");
307}
308
309bool TemplateArgument::isDependent() const {
310 return getDependence() & TemplateArgumentDependence::Dependent;
311}
312
313bool TemplateArgument::isInstantiationDependent() const {
314 return getDependence() & TemplateArgumentDependence::Instantiation;
315}
316
317bool TemplateArgument::isPackExpansion() const {
318 switch (getKind()) {
319 case Null:
320 case Declaration:
321 case Integral:
322 case StructuralValue:
323 case Pack:
324 case Template:
325 case NullPtr:
326 return false;
327
328 case TemplateExpansion:
329 return true;
330
331 case Type:
332 return isa<PackExpansionType>(Val: getAsType());
333
334 case Expression:
335 return isa<PackExpansionExpr>(Val: getAsExpr());
336 }
337
338 llvm_unreachable("Invalid TemplateArgument Kind!");
339}
340
341bool TemplateArgument::containsUnexpandedParameterPack() const {
342 return getDependence() & TemplateArgumentDependence::UnexpandedPack;
343}
344
345std::optional<unsigned> TemplateArgument::getNumTemplateExpansions() const {
346 assert(getKind() == TemplateExpansion);
347 if (TemplateArg.NumExpansions)
348 return TemplateArg.NumExpansions - 1;
349
350 return std::nullopt;
351}
352
353QualType TemplateArgument::getNonTypeTemplateArgumentType() const {
354 switch (getKind()) {
355 case TemplateArgument::Null:
356 case TemplateArgument::Type:
357 case TemplateArgument::Template:
358 case TemplateArgument::TemplateExpansion:
359 case TemplateArgument::Pack:
360 return QualType();
361
362 case TemplateArgument::Integral:
363 return getIntegralType();
364
365 case TemplateArgument::Expression:
366 return getAsExpr()->getType();
367
368 case TemplateArgument::Declaration:
369 return getParamTypeForDecl();
370
371 case TemplateArgument::NullPtr:
372 return getNullPtrType();
373
374 case TemplateArgument::StructuralValue:
375 return getStructuralValueType();
376 }
377
378 llvm_unreachable("Invalid TemplateArgument Kind!");
379}
380
381void TemplateArgument::Profile(llvm::FoldingSetNodeID &ID,
382 const ASTContext &Context) const {
383 ID.AddInteger(I: getKind());
384 switch (getKind()) {
385 case Null:
386 break;
387
388 case Type:
389 getAsType().Profile(ID);
390 break;
391
392 case NullPtr:
393 getNullPtrType().Profile(ID);
394 break;
395
396 case Declaration:
397 getParamTypeForDecl().Profile(ID);
398 ID.AddPointer(Ptr: getAsDecl());
399 break;
400
401 case TemplateExpansion:
402 ID.AddInteger(I: TemplateArg.NumExpansions);
403 [[fallthrough]];
404 case Template:
405 ID.AddPointer(Ptr: TemplateArg.Name);
406 break;
407
408 case Integral:
409 getIntegralType().Profile(ID);
410 getAsIntegral().Profile(ID);
411 break;
412
413 case StructuralValue:
414 getStructuralValueType().Profile(ID);
415 getAsStructuralValue().Profile(ID);
416 break;
417
418 case Expression:
419 getAsExpr()->Profile(ID, Context, true);
420 break;
421
422 case Pack:
423 ID.AddInteger(I: Args.NumArgs);
424 for (unsigned I = 0; I != Args.NumArgs; ++I)
425 Args.Args[I].Profile(ID, Context);
426 }
427}
428
429bool TemplateArgument::structurallyEquals(const TemplateArgument &Other) const {
430 if (getKind() != Other.getKind()) return false;
431
432 switch (getKind()) {
433 case Null:
434 case Type:
435 case Expression:
436 case NullPtr:
437 return TypeOrValue.V == Other.TypeOrValue.V;
438
439 case Template:
440 case TemplateExpansion:
441 return TemplateArg.Name == Other.TemplateArg.Name &&
442 TemplateArg.NumExpansions == Other.TemplateArg.NumExpansions;
443
444 case Declaration:
445 return getAsDecl() == Other.getAsDecl() &&
446 getParamTypeForDecl() == Other.getParamTypeForDecl();
447
448 case Integral:
449 return getIntegralType() == Other.getIntegralType() &&
450 getAsIntegral() == Other.getAsIntegral();
451
452 case StructuralValue: {
453 if (getStructuralValueType().getCanonicalType() !=
454 Other.getStructuralValueType().getCanonicalType())
455 return false;
456
457 llvm::FoldingSetNodeID A, B;
458 getAsStructuralValue().Profile(ID&: A);
459 Other.getAsStructuralValue().Profile(ID&: B);
460 return A == B;
461 }
462
463 case Pack:
464 if (Args.NumArgs != Other.Args.NumArgs) return false;
465 for (unsigned I = 0, E = Args.NumArgs; I != E; ++I)
466 if (!Args.Args[I].structurallyEquals(Other: Other.Args.Args[I]))
467 return false;
468 return true;
469 }
470
471 llvm_unreachable("Invalid TemplateArgument Kind!");
472}
473
474TemplateArgument TemplateArgument::getPackExpansionPattern() const {
475 assert(isPackExpansion());
476
477 switch (getKind()) {
478 case Type:
479 return getAsType()->castAs<PackExpansionType>()->getPattern();
480
481 case Expression:
482 return cast<PackExpansionExpr>(Val: getAsExpr())->getPattern();
483
484 case TemplateExpansion:
485 return TemplateArgument(getAsTemplateOrTemplatePattern());
486
487 case Declaration:
488 case Integral:
489 case StructuralValue:
490 case Pack:
491 case Null:
492 case Template:
493 case NullPtr:
494 return TemplateArgument();
495 }
496
497 llvm_unreachable("Invalid TemplateArgument Kind!");
498}
499
500void TemplateArgument::print(const PrintingPolicy &Policy, raw_ostream &Out,
501 bool IncludeType) const {
502
503 switch (getKind()) {
504 case Null:
505 Out << "(no value)";
506 break;
507
508 case Type: {
509 PrintingPolicy SubPolicy(Policy);
510 SubPolicy.SuppressStrongLifetime = true;
511 getAsType().print(OS&: Out, Policy: SubPolicy);
512 break;
513 }
514
515 case Declaration: {
516 NamedDecl *ND = getAsDecl();
517 if (getParamTypeForDecl()->isRecordType()) {
518 if (auto *TPO = dyn_cast<TemplateParamObjectDecl>(ND)) {
519 TPO->getType().getUnqualifiedType().print(Out, Policy);
520 TPO->printAsInit(Out, Policy);
521 break;
522 }
523 }
524 if (auto *VD = dyn_cast<ValueDecl>(ND)) {
525 if (needsAmpersandOnTemplateArg(getParamTypeForDecl(), VD->getType()))
526 Out << "&";
527 }
528 ND->printQualifiedName(OS&: Out);
529 break;
530 }
531
532 case StructuralValue:
533 getAsStructuralValue().printPretty(OS&: Out, Policy, Ty: getStructuralValueType());
534 break;
535
536 case NullPtr:
537 // FIXME: Include the type if it's not obvious from the context.
538 Out << "nullptr";
539 break;
540
541 case Template:
542 getAsTemplate().print(OS&: Out, Policy, Qual: TemplateName::Qualified::Fully);
543 break;
544
545 case TemplateExpansion:
546 getAsTemplateOrTemplatePattern().print(OS&: Out, Policy);
547 Out << "...";
548 break;
549
550 case Integral:
551 printIntegral(TemplArg: *this, Out, Policy, IncludeType);
552 break;
553
554 case Expression:
555 getAsExpr()->printPretty(Out, nullptr, Policy);
556 break;
557
558 case Pack:
559 Out << "<";
560 bool First = true;
561 for (const auto &P : pack_elements()) {
562 if (First)
563 First = false;
564 else
565 Out << ", ";
566
567 P.print(Policy, Out, IncludeType);
568 }
569 Out << ">";
570 break;
571 }
572}
573
574void TemplateArgument::dump(raw_ostream &Out) const {
575 LangOptions LO; // FIXME! see also TemplateName::dump().
576 LO.CPlusPlus = true;
577 LO.Bool = true;
578 print(Policy: PrintingPolicy(LO), Out, /*IncludeType*/ true);
579}
580
581LLVM_DUMP_METHOD void TemplateArgument::dump() const { dump(Out&: llvm::errs()); }
582
583//===----------------------------------------------------------------------===//
584// TemplateArgumentLoc Implementation
585//===----------------------------------------------------------------------===//
586
587SourceRange TemplateArgumentLoc::getSourceRange() const {
588 switch (Argument.getKind()) {
589 case TemplateArgument::Expression:
590 return getSourceExpression()->getSourceRange();
591
592 case TemplateArgument::Declaration:
593 return getSourceDeclExpression()->getSourceRange();
594
595 case TemplateArgument::NullPtr:
596 return getSourceNullPtrExpression()->getSourceRange();
597
598 case TemplateArgument::Type:
599 if (TypeSourceInfo *TSI = getTypeSourceInfo())
600 return TSI->getTypeLoc().getSourceRange();
601 else
602 return SourceRange();
603
604 case TemplateArgument::Template:
605 if (getTemplateQualifierLoc())
606 return SourceRange(getTemplateQualifierLoc().getBeginLoc(),
607 getTemplateNameLoc());
608 return SourceRange(getTemplateNameLoc());
609
610 case TemplateArgument::TemplateExpansion:
611 if (getTemplateQualifierLoc())
612 return SourceRange(getTemplateQualifierLoc().getBeginLoc(),
613 getTemplateEllipsisLoc());
614 return SourceRange(getTemplateNameLoc(), getTemplateEllipsisLoc());
615
616 case TemplateArgument::Integral:
617 return getSourceIntegralExpression()->getSourceRange();
618
619 case TemplateArgument::StructuralValue:
620 return getSourceStructuralValueExpression()->getSourceRange();
621
622 case TemplateArgument::Pack:
623 case TemplateArgument::Null:
624 return SourceRange();
625 }
626
627 llvm_unreachable("Invalid TemplateArgument Kind!");
628}
629
630template <typename T>
631static const T &DiagTemplateArg(const T &DB, const TemplateArgument &Arg) {
632 switch (Arg.getKind()) {
633 case TemplateArgument::Null:
634 // This is bad, but not as bad as crashing because of argument
635 // count mismatches.
636 return DB << "(null template argument)";
637
638 case TemplateArgument::Type:
639 return DB << Arg.getAsType();
640
641 case TemplateArgument::Declaration:
642 return DB << Arg.getAsDecl();
643
644 case TemplateArgument::NullPtr:
645 return DB << "nullptr";
646
647 case TemplateArgument::Integral:
648 return DB << toString(I: Arg.getAsIntegral(), Radix: 10);
649
650 case TemplateArgument::StructuralValue: {
651 // FIXME: We're guessing at LangOptions!
652 SmallString<32> Str;
653 llvm::raw_svector_ostream OS(Str);
654 LangOptions LangOpts;
655 LangOpts.CPlusPlus = true;
656 PrintingPolicy Policy(LangOpts);
657 Arg.getAsStructuralValue().printPretty(OS, Policy,
658 Ty: Arg.getStructuralValueType());
659 return DB << OS.str();
660 }
661
662 case TemplateArgument::Template:
663 return DB << Arg.getAsTemplate();
664
665 case TemplateArgument::TemplateExpansion:
666 return DB << Arg.getAsTemplateOrTemplatePattern() << "...";
667
668 case TemplateArgument::Expression: {
669 // This shouldn't actually ever happen, so it's okay that we're
670 // regurgitating an expression here.
671 // FIXME: We're guessing at LangOptions!
672 SmallString<32> Str;
673 llvm::raw_svector_ostream OS(Str);
674 LangOptions LangOpts;
675 LangOpts.CPlusPlus = true;
676 PrintingPolicy Policy(LangOpts);
677 Arg.getAsExpr()->printPretty(OS, nullptr, Policy);
678 return DB << OS.str();
679 }
680
681 case TemplateArgument::Pack: {
682 // FIXME: We're guessing at LangOptions!
683 SmallString<32> Str;
684 llvm::raw_svector_ostream OS(Str);
685 LangOptions LangOpts;
686 LangOpts.CPlusPlus = true;
687 PrintingPolicy Policy(LangOpts);
688 Arg.print(Policy, Out&: OS, /*IncludeType*/ true);
689 return DB << OS.str();
690 }
691 }
692
693 llvm_unreachable("Invalid TemplateArgument Kind!");
694}
695
696const StreamingDiagnostic &clang::operator<<(const StreamingDiagnostic &DB,
697 const TemplateArgument &Arg) {
698 return DiagTemplateArg(DB, Arg);
699}
700
701clang::TemplateArgumentLocInfo::TemplateArgumentLocInfo(
702 ASTContext &Ctx, NestedNameSpecifierLoc QualifierLoc,
703 SourceLocation TemplateNameLoc, SourceLocation EllipsisLoc) {
704 TemplateTemplateArgLocInfo *Template = new (Ctx) TemplateTemplateArgLocInfo;
705 Template->Qualifier = QualifierLoc.getNestedNameSpecifier();
706 Template->QualifierLocData = QualifierLoc.getOpaqueData();
707 Template->TemplateNameLoc = TemplateNameLoc;
708 Template->EllipsisLoc = EllipsisLoc;
709 Pointer = Template;
710}
711
712const ASTTemplateArgumentListInfo *
713ASTTemplateArgumentListInfo::Create(const ASTContext &C,
714 const TemplateArgumentListInfo &List) {
715 std::size_t size = totalSizeToAlloc<TemplateArgumentLoc>(Counts: List.size());
716 void *Mem = C.Allocate(Size: size, Align: alignof(ASTTemplateArgumentListInfo));
717 return new (Mem) ASTTemplateArgumentListInfo(List);
718}
719
720const ASTTemplateArgumentListInfo *
721ASTTemplateArgumentListInfo::Create(const ASTContext &C,
722 const ASTTemplateArgumentListInfo *List) {
723 if (!List)
724 return nullptr;
725 std::size_t size =
726 totalSizeToAlloc<TemplateArgumentLoc>(Counts: List->getNumTemplateArgs());
727 void *Mem = C.Allocate(Size: size, Align: alignof(ASTTemplateArgumentListInfo));
728 return new (Mem) ASTTemplateArgumentListInfo(List);
729}
730
731ASTTemplateArgumentListInfo::ASTTemplateArgumentListInfo(
732 const TemplateArgumentListInfo &Info) {
733 LAngleLoc = Info.getLAngleLoc();
734 RAngleLoc = Info.getRAngleLoc();
735 NumTemplateArgs = Info.size();
736
737 TemplateArgumentLoc *ArgBuffer = getTrailingObjects<TemplateArgumentLoc>();
738 for (unsigned i = 0; i != NumTemplateArgs; ++i)
739 new (&ArgBuffer[i]) TemplateArgumentLoc(Info[i]);
740}
741
742ASTTemplateArgumentListInfo::ASTTemplateArgumentListInfo(
743 const ASTTemplateArgumentListInfo *Info) {
744 LAngleLoc = Info->getLAngleLoc();
745 RAngleLoc = Info->getRAngleLoc();
746 NumTemplateArgs = Info->getNumTemplateArgs();
747
748 TemplateArgumentLoc *ArgBuffer = getTrailingObjects<TemplateArgumentLoc>();
749 for (unsigned i = 0; i != NumTemplateArgs; ++i)
750 new (&ArgBuffer[i]) TemplateArgumentLoc((*Info)[i]);
751}
752
753void ASTTemplateKWAndArgsInfo::initializeFrom(
754 SourceLocation TemplateKWLoc, const TemplateArgumentListInfo &Info,
755 TemplateArgumentLoc *OutArgArray) {
756 this->TemplateKWLoc = TemplateKWLoc;
757 LAngleLoc = Info.getLAngleLoc();
758 RAngleLoc = Info.getRAngleLoc();
759 NumTemplateArgs = Info.size();
760
761 for (unsigned i = 0; i != NumTemplateArgs; ++i)
762 new (&OutArgArray[i]) TemplateArgumentLoc(Info[i]);
763}
764
765void ASTTemplateKWAndArgsInfo::initializeFrom(SourceLocation TemplateKWLoc) {
766 assert(TemplateKWLoc.isValid());
767 LAngleLoc = SourceLocation();
768 RAngleLoc = SourceLocation();
769 this->TemplateKWLoc = TemplateKWLoc;
770 NumTemplateArgs = 0;
771}
772
773void ASTTemplateKWAndArgsInfo::initializeFrom(
774 SourceLocation TemplateKWLoc, const TemplateArgumentListInfo &Info,
775 TemplateArgumentLoc *OutArgArray, TemplateArgumentDependence &Deps) {
776 this->TemplateKWLoc = TemplateKWLoc;
777 LAngleLoc = Info.getLAngleLoc();
778 RAngleLoc = Info.getRAngleLoc();
779 NumTemplateArgs = Info.size();
780
781 for (unsigned i = 0; i != NumTemplateArgs; ++i) {
782 Deps |= Info[i].getArgument().getDependence();
783
784 new (&OutArgArray[i]) TemplateArgumentLoc(Info[i]);
785 }
786}
787
788void ASTTemplateKWAndArgsInfo::copyInto(const TemplateArgumentLoc *ArgArray,
789 TemplateArgumentListInfo &Info) const {
790 Info.setLAngleLoc(LAngleLoc);
791 Info.setRAngleLoc(RAngleLoc);
792 for (unsigned I = 0; I != NumTemplateArgs; ++I)
793 Info.addArgument(Loc: ArgArray[I]);
794}
795

source code of clang/lib/AST/TemplateBase.cpp