xref: /freebsd/contrib/llvm-project/clang/lib/AST/TemplateBase.cpp (revision d9a42747950146bf03cda7f6e25d219253f8a57a) 
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/None.h"
33 #include "llvm/ADT/SmallString.h"
34 #include "llvm/ADT/StringExtras.h"
35 #include "llvm/ADT/StringRef.h"
36 #include "llvm/Support/Casting.h"
37 #include "llvm/Support/Compiler.h"
38 #include "llvm/Support/ErrorHandling.h"
39 #include "llvm/Support/raw_ostream.h"
40 #include <cassert>
41 #include <cstddef>
42 #include <cstdint>
43 #include <cstring>
44 
45 using 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.
57 static 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(ECD->getInitVal(), 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(BuiltinType::SChar))
88         Out << "(signed char)";
89       else if (T->isSpecificBuiltinType(BuiltinType::UChar))
90         Out << "(unsigned char)";
91     }
92     CharacterLiteral::print(Val.getZExtValue(), CharacterLiteral::Ascii, Out);
93   } else if (T->isAnyCharacterType() && !Policy.MSVCFormatting) {
94     CharacterLiteral::CharacterKind Kind;
95     if (T->isWideCharType())
96       Kind = CharacterLiteral::Wide;
97     else if (T->isChar8Type())
98       Kind = CharacterLiteral::UTF8;
99     else if (T->isChar16Type())
100       Kind = CharacterLiteral::UTF16;
101     else if (T->isChar32Type())
102       Kind = CharacterLiteral::UTF32;
103     else
104       Kind = CharacterLiteral::Ascii;
105     CharacterLiteral::print(Val.getExtValue(), Kind, Out);
106   } else if (IncludeType) {
107     if (const auto *BT = T->getAs<BuiltinType>()) {
108       switch (BT->getKind()) {
109       case BuiltinType::ULongLong:
110         Out << Val << "ULL";
111         break;
112       case BuiltinType::LongLong:
113         Out << Val << "LL";
114         break;
115       case BuiltinType::ULong:
116         Out << Val << "UL";
117         break;
118       case BuiltinType::Long:
119         Out << Val << "L";
120         break;
121       case BuiltinType::UInt:
122         Out << Val << "U";
123         break;
124       case BuiltinType::Int:
125         Out << Val;
126         break;
127       default:
128         Out << "(" << T->getCanonicalTypeInternal().getAsString(Policy) << ")"
129             << Val;
130         break;
131       }
132     } else
133       Out << "(" << T->getCanonicalTypeInternal().getAsString(Policy) << ")"
134           << Val;
135   } else
136     Out << Val;
137 }
138 
139 static unsigned getArrayDepth(QualType type) {
140   unsigned count = 0;
141   while (const auto *arrayType = type->getAsArrayTypeUnsafe()) {
142     count++;
143     type = arrayType->getElementType();
144   }
145   return count;
146 }
147 
148 static bool needsAmpersandOnTemplateArg(QualType paramType, QualType argType) {
149   // Generally, if the parameter type is a pointer, we must be taking the
150   // address of something and need a &.  However, if the argument is an array,
151   // this could be implicit via array-to-pointer decay.
152   if (!paramType->isPointerType())
153     return paramType->isMemberPointerType();
154   if (argType->isArrayType())
155     return getArrayDepth(argType) == getArrayDepth(paramType->getPointeeType());
156   return true;
157 }
158 
159 //===----------------------------------------------------------------------===//
160 // TemplateArgument Implementation
161 //===----------------------------------------------------------------------===//
162 
163 TemplateArgument::TemplateArgument(ASTContext &Ctx, const llvm::APSInt &Value,
164                                    QualType Type) {
165   Integer.Kind = Integral;
166   // Copy the APSInt value into our decomposed form.
167   Integer.BitWidth = Value.getBitWidth();
168   Integer.IsUnsigned = Value.isUnsigned();
169   // If the value is large, we have to get additional memory from the ASTContext
170   unsigned NumWords = Value.getNumWords();
171   if (NumWords > 1) {
172     void *Mem = Ctx.Allocate(NumWords * sizeof(uint64_t));
173     std::memcpy(Mem, Value.getRawData(), NumWords * sizeof(uint64_t));
174     Integer.pVal = static_cast<uint64_t *>(Mem);
175   } else {
176     Integer.VAL = Value.getZExtValue();
177   }
178 
179   Integer.Type = Type.getAsOpaquePtr();
180 }
181 
182 TemplateArgument
183 TemplateArgument::CreatePackCopy(ASTContext &Context,
184                                  ArrayRef<TemplateArgument> Args) {
185   if (Args.empty())
186     return getEmptyPack();
187 
188   return TemplateArgument(Args.copy(Context));
189 }
190 
191 TemplateArgumentDependence TemplateArgument::getDependence() const {
192   auto Deps = TemplateArgumentDependence::None;
193   switch (getKind()) {
194   case Null:
195     llvm_unreachable("Should not have a NULL template argument");
196 
197   case Type:
198     Deps = toTemplateArgumentDependence(getAsType()->getDependence());
199     if (isa<PackExpansionType>(getAsType()))
200       Deps |= TemplateArgumentDependence::Dependent;
201     return Deps;
202 
203   case Template:
204     return toTemplateArgumentDependence(getAsTemplate().getDependence());
205 
206   case TemplateExpansion:
207     return TemplateArgumentDependence::Dependent |
208            TemplateArgumentDependence::Instantiation;
209 
210   case Declaration: {
211     auto *DC = dyn_cast<DeclContext>(getAsDecl());
212     if (!DC)
213       DC = getAsDecl()->getDeclContext();
214     if (DC->isDependentContext())
215       Deps = TemplateArgumentDependence::Dependent |
216              TemplateArgumentDependence::Instantiation;
217     return Deps;
218   }
219 
220   case NullPtr:
221   case Integral:
222     return TemplateArgumentDependence::None;
223 
224   case Expression:
225     Deps = toTemplateArgumentDependence(getAsExpr()->getDependence());
226     if (isa<PackExpansionExpr>(getAsExpr()))
227       Deps |= TemplateArgumentDependence::Dependent |
228               TemplateArgumentDependence::Instantiation;
229     return Deps;
230 
231   case Pack:
232     for (const auto &P : pack_elements())
233       Deps |= P.getDependence();
234     return Deps;
235   }
236   llvm_unreachable("unhandled ArgKind");
237 }
238 
239 bool TemplateArgument::isDependent() const {
240   return getDependence() & TemplateArgumentDependence::Dependent;
241 }
242 
243 bool TemplateArgument::isInstantiationDependent() const {
244   return getDependence() & TemplateArgumentDependence::Instantiation;
245 }
246 
247 bool TemplateArgument::isPackExpansion() const {
248   switch (getKind()) {
249   case Null:
250   case Declaration:
251   case Integral:
252   case Pack:
253   case Template:
254   case NullPtr:
255     return false;
256 
257   case TemplateExpansion:
258     return true;
259 
260   case Type:
261     return isa<PackExpansionType>(getAsType());
262 
263   case Expression:
264     return isa<PackExpansionExpr>(getAsExpr());
265   }
266 
267   llvm_unreachable("Invalid TemplateArgument Kind!");
268 }
269 
270 bool TemplateArgument::containsUnexpandedParameterPack() const {
271   return getDependence() & TemplateArgumentDependence::UnexpandedPack;
272 }
273 
274 Optional<unsigned> TemplateArgument::getNumTemplateExpansions() const {
275   assert(getKind() == TemplateExpansion);
276   if (TemplateArg.NumExpansions)
277     return TemplateArg.NumExpansions - 1;
278 
279   return None;
280 }
281 
282 QualType TemplateArgument::getNonTypeTemplateArgumentType() const {
283   switch (getKind()) {
284   case TemplateArgument::Null:
285   case TemplateArgument::Type:
286   case TemplateArgument::Template:
287   case TemplateArgument::TemplateExpansion:
288   case TemplateArgument::Pack:
289     return QualType();
290 
291   case TemplateArgument::Integral:
292     return getIntegralType();
293 
294   case TemplateArgument::Expression:
295     return getAsExpr()->getType();
296 
297   case TemplateArgument::Declaration:
298     return getParamTypeForDecl();
299 
300   case TemplateArgument::NullPtr:
301     return getNullPtrType();
302   }
303 
304   llvm_unreachable("Invalid TemplateArgument Kind!");
305 }
306 
307 void TemplateArgument::Profile(llvm::FoldingSetNodeID &ID,
308                                const ASTContext &Context) const {
309   ID.AddInteger(getKind());
310   switch (getKind()) {
311   case Null:
312     break;
313 
314   case Type:
315     getAsType().Profile(ID);
316     break;
317 
318   case NullPtr:
319     getNullPtrType().Profile(ID);
320     break;
321 
322   case Declaration:
323     getParamTypeForDecl().Profile(ID);
324     ID.AddPointer(getAsDecl()? getAsDecl()->getCanonicalDecl() : nullptr);
325     break;
326 
327   case Template:
328   case TemplateExpansion: {
329     TemplateName Template = getAsTemplateOrTemplatePattern();
330     if (TemplateTemplateParmDecl *TTP
331           = dyn_cast_or_null<TemplateTemplateParmDecl>(
332                                                 Template.getAsTemplateDecl())) {
333       ID.AddBoolean(true);
334       ID.AddInteger(TTP->getDepth());
335       ID.AddInteger(TTP->getPosition());
336       ID.AddBoolean(TTP->isParameterPack());
337     } else {
338       ID.AddBoolean(false);
339       ID.AddPointer(Context.getCanonicalTemplateName(Template)
340                                                           .getAsVoidPointer());
341     }
342     break;
343   }
344 
345   case Integral:
346     getAsIntegral().Profile(ID);
347     getIntegralType().Profile(ID);
348     break;
349 
350   case Expression:
351     getAsExpr()->Profile(ID, Context, true);
352     break;
353 
354   case Pack:
355     ID.AddInteger(Args.NumArgs);
356     for (unsigned I = 0; I != Args.NumArgs; ++I)
357       Args.Args[I].Profile(ID, Context);
358   }
359 }
360 
361 bool TemplateArgument::structurallyEquals(const TemplateArgument &Other) const {
362   if (getKind() != Other.getKind()) return false;
363 
364   switch (getKind()) {
365   case Null:
366   case Type:
367   case Expression:
368   case NullPtr:
369     return TypeOrValue.V == Other.TypeOrValue.V;
370 
371   case Template:
372   case TemplateExpansion:
373     return TemplateArg.Name == Other.TemplateArg.Name &&
374            TemplateArg.NumExpansions == Other.TemplateArg.NumExpansions;
375 
376   case Declaration:
377     return getAsDecl() == Other.getAsDecl();
378 
379   case Integral:
380     return getIntegralType() == Other.getIntegralType() &&
381            getAsIntegral() == Other.getAsIntegral();
382 
383   case Pack:
384     if (Args.NumArgs != Other.Args.NumArgs) return false;
385     for (unsigned I = 0, E = Args.NumArgs; I != E; ++I)
386       if (!Args.Args[I].structurallyEquals(Other.Args.Args[I]))
387         return false;
388     return true;
389   }
390 
391   llvm_unreachable("Invalid TemplateArgument Kind!");
392 }
393 
394 TemplateArgument TemplateArgument::getPackExpansionPattern() const {
395   assert(isPackExpansion());
396 
397   switch (getKind()) {
398   case Type:
399     return getAsType()->castAs<PackExpansionType>()->getPattern();
400 
401   case Expression:
402     return cast<PackExpansionExpr>(getAsExpr())->getPattern();
403 
404   case TemplateExpansion:
405     return TemplateArgument(getAsTemplateOrTemplatePattern());
406 
407   case Declaration:
408   case Integral:
409   case Pack:
410   case Null:
411   case Template:
412   case NullPtr:
413     return TemplateArgument();
414   }
415 
416   llvm_unreachable("Invalid TemplateArgument Kind!");
417 }
418 
419 void TemplateArgument::print(const PrintingPolicy &Policy, raw_ostream &Out,
420                              bool IncludeType) const {
421 
422   switch (getKind()) {
423   case Null:
424     Out << "(no value)";
425     break;
426 
427   case Type: {
428     PrintingPolicy SubPolicy(Policy);
429     SubPolicy.SuppressStrongLifetime = true;
430     getAsType().print(Out, SubPolicy);
431     break;
432   }
433 
434   case Declaration: {
435     // FIXME: Include the type if it's not obvious from the context.
436     NamedDecl *ND = getAsDecl();
437     if (getParamTypeForDecl()->isRecordType()) {
438       if (auto *TPO = dyn_cast<TemplateParamObjectDecl>(ND)) {
439         TPO->printAsInit(Out, Policy);
440         break;
441       }
442     }
443     if (auto *VD = dyn_cast<ValueDecl>(ND)) {
444       if (needsAmpersandOnTemplateArg(getParamTypeForDecl(), VD->getType()))
445         Out << "&";
446     }
447     ND->printQualifiedName(Out);
448     break;
449   }
450 
451   case NullPtr:
452     // FIXME: Include the type if it's not obvious from the context.
453     Out << "nullptr";
454     break;
455 
456   case Template:
457     getAsTemplate().print(Out, Policy, TemplateName::Qualified::Fully);
458     break;
459 
460   case TemplateExpansion:
461     getAsTemplateOrTemplatePattern().print(Out, Policy);
462     Out << "...";
463     break;
464 
465   case Integral:
466     printIntegral(*this, Out, Policy, IncludeType);
467     break;
468 
469   case Expression:
470     getAsExpr()->printPretty(Out, nullptr, Policy);
471     break;
472 
473   case Pack:
474     Out << "<";
475     bool First = true;
476     for (const auto &P : pack_elements()) {
477       if (First)
478         First = false;
479       else
480         Out << ", ";
481 
482       P.print(Policy, Out, IncludeType);
483     }
484     Out << ">";
485     break;
486   }
487 }
488 
489 void TemplateArgument::dump(raw_ostream &Out) const {
490   LangOptions LO; // FIXME! see also TemplateName::dump().
491   LO.CPlusPlus = true;
492   LO.Bool = true;
493   print(PrintingPolicy(LO), Out, /*IncludeType*/ true);
494 }
495 
496 LLVM_DUMP_METHOD void TemplateArgument::dump() const { dump(llvm::errs()); }
497 
498 //===----------------------------------------------------------------------===//
499 // TemplateArgumentLoc Implementation
500 //===----------------------------------------------------------------------===//
501 
502 SourceRange TemplateArgumentLoc::getSourceRange() const {
503   switch (Argument.getKind()) {
504   case TemplateArgument::Expression:
505     return getSourceExpression()->getSourceRange();
506 
507   case TemplateArgument::Declaration:
508     return getSourceDeclExpression()->getSourceRange();
509 
510   case TemplateArgument::NullPtr:
511     return getSourceNullPtrExpression()->getSourceRange();
512 
513   case TemplateArgument::Type:
514     if (TypeSourceInfo *TSI = getTypeSourceInfo())
515       return TSI->getTypeLoc().getSourceRange();
516     else
517       return SourceRange();
518 
519   case TemplateArgument::Template:
520     if (getTemplateQualifierLoc())
521       return SourceRange(getTemplateQualifierLoc().getBeginLoc(),
522                          getTemplateNameLoc());
523     return SourceRange(getTemplateNameLoc());
524 
525   case TemplateArgument::TemplateExpansion:
526     if (getTemplateQualifierLoc())
527       return SourceRange(getTemplateQualifierLoc().getBeginLoc(),
528                          getTemplateEllipsisLoc());
529     return SourceRange(getTemplateNameLoc(), getTemplateEllipsisLoc());
530 
531   case TemplateArgument::Integral:
532     return getSourceIntegralExpression()->getSourceRange();
533 
534   case TemplateArgument::Pack:
535   case TemplateArgument::Null:
536     return SourceRange();
537   }
538 
539   llvm_unreachable("Invalid TemplateArgument Kind!");
540 }
541 
542 template <typename T>
543 static const T &DiagTemplateArg(const T &DB, const TemplateArgument &Arg) {
544   switch (Arg.getKind()) {
545   case TemplateArgument::Null:
546     // This is bad, but not as bad as crashing because of argument
547     // count mismatches.
548     return DB << "(null template argument)";
549 
550   case TemplateArgument::Type:
551     return DB << Arg.getAsType();
552 
553   case TemplateArgument::Declaration:
554     return DB << Arg.getAsDecl();
555 
556   case TemplateArgument::NullPtr:
557     return DB << "nullptr";
558 
559   case TemplateArgument::Integral:
560     return DB << toString(Arg.getAsIntegral(), 10);
561 
562   case TemplateArgument::Template:
563     return DB << Arg.getAsTemplate();
564 
565   case TemplateArgument::TemplateExpansion:
566     return DB << Arg.getAsTemplateOrTemplatePattern() << "...";
567 
568   case TemplateArgument::Expression: {
569     // This shouldn't actually ever happen, so it's okay that we're
570     // regurgitating an expression here.
571     // FIXME: We're guessing at LangOptions!
572     SmallString<32> Str;
573     llvm::raw_svector_ostream OS(Str);
574     LangOptions LangOpts;
575     LangOpts.CPlusPlus = true;
576     PrintingPolicy Policy(LangOpts);
577     Arg.getAsExpr()->printPretty(OS, nullptr, Policy);
578     return DB << OS.str();
579   }
580 
581   case TemplateArgument::Pack: {
582     // FIXME: We're guessing at LangOptions!
583     SmallString<32> Str;
584     llvm::raw_svector_ostream OS(Str);
585     LangOptions LangOpts;
586     LangOpts.CPlusPlus = true;
587     PrintingPolicy Policy(LangOpts);
588     Arg.print(Policy, OS, /*IncludeType*/ true);
589     return DB << OS.str();
590   }
591   }
592 
593   llvm_unreachable("Invalid TemplateArgument Kind!");
594 }
595 
596 const StreamingDiagnostic &clang::operator<<(const StreamingDiagnostic &DB,
597                                              const TemplateArgument &Arg) {
598   return DiagTemplateArg(DB, Arg);
599 }
600 
601 clang::TemplateArgumentLocInfo::TemplateArgumentLocInfo(
602     ASTContext &Ctx, NestedNameSpecifierLoc QualifierLoc,
603     SourceLocation TemplateNameLoc, SourceLocation EllipsisLoc) {
604   TemplateTemplateArgLocInfo *Template = new (Ctx) TemplateTemplateArgLocInfo;
605   Template->Qualifier = QualifierLoc.getNestedNameSpecifier();
606   Template->QualifierLocData = QualifierLoc.getOpaqueData();
607   Template->TemplateNameLoc = TemplateNameLoc;
608   Template->EllipsisLoc = EllipsisLoc;
609   Pointer = Template;
610 }
611 
612 const ASTTemplateArgumentListInfo *
613 ASTTemplateArgumentListInfo::Create(const ASTContext &C,
614                                     const TemplateArgumentListInfo &List) {
615   std::size_t size = totalSizeToAlloc<TemplateArgumentLoc>(List.size());
616   void *Mem = C.Allocate(size, alignof(ASTTemplateArgumentListInfo));
617   return new (Mem) ASTTemplateArgumentListInfo(List);
618 }
619 
620 const ASTTemplateArgumentListInfo *
621 ASTTemplateArgumentListInfo::Create(const ASTContext &C,
622                                     const ASTTemplateArgumentListInfo *List) {
623   if (!List)
624     return nullptr;
625   std::size_t size =
626       totalSizeToAlloc<TemplateArgumentLoc>(List->getNumTemplateArgs());
627   void *Mem = C.Allocate(size, alignof(ASTTemplateArgumentListInfo));
628   return new (Mem) ASTTemplateArgumentListInfo(List);
629 }
630 
631 ASTTemplateArgumentListInfo::ASTTemplateArgumentListInfo(
632     const TemplateArgumentListInfo &Info) {
633   LAngleLoc = Info.getLAngleLoc();
634   RAngleLoc = Info.getRAngleLoc();
635   NumTemplateArgs = Info.size();
636 
637   TemplateArgumentLoc *ArgBuffer = getTrailingObjects<TemplateArgumentLoc>();
638   for (unsigned i = 0; i != NumTemplateArgs; ++i)
639     new (&ArgBuffer[i]) TemplateArgumentLoc(Info[i]);
640 }
641 
642 ASTTemplateArgumentListInfo::ASTTemplateArgumentListInfo(
643     const ASTTemplateArgumentListInfo *Info) {
644   LAngleLoc = Info->getLAngleLoc();
645   RAngleLoc = Info->getRAngleLoc();
646   NumTemplateArgs = Info->getNumTemplateArgs();
647 
648   TemplateArgumentLoc *ArgBuffer = getTrailingObjects<TemplateArgumentLoc>();
649   for (unsigned i = 0; i != NumTemplateArgs; ++i)
650     new (&ArgBuffer[i]) TemplateArgumentLoc((*Info)[i]);
651 }
652 
653 void ASTTemplateKWAndArgsInfo::initializeFrom(
654     SourceLocation TemplateKWLoc, const TemplateArgumentListInfo &Info,
655     TemplateArgumentLoc *OutArgArray) {
656   this->TemplateKWLoc = TemplateKWLoc;
657   LAngleLoc = Info.getLAngleLoc();
658   RAngleLoc = Info.getRAngleLoc();
659   NumTemplateArgs = Info.size();
660 
661   for (unsigned i = 0; i != NumTemplateArgs; ++i)
662     new (&OutArgArray[i]) TemplateArgumentLoc(Info[i]);
663 }
664 
665 void ASTTemplateKWAndArgsInfo::initializeFrom(SourceLocation TemplateKWLoc) {
666   assert(TemplateKWLoc.isValid());
667   LAngleLoc = SourceLocation();
668   RAngleLoc = SourceLocation();
669   this->TemplateKWLoc = TemplateKWLoc;
670   NumTemplateArgs = 0;
671 }
672 
673 void ASTTemplateKWAndArgsInfo::initializeFrom(
674     SourceLocation TemplateKWLoc, const TemplateArgumentListInfo &Info,
675     TemplateArgumentLoc *OutArgArray, TemplateArgumentDependence &Deps) {
676   this->TemplateKWLoc = TemplateKWLoc;
677   LAngleLoc = Info.getLAngleLoc();
678   RAngleLoc = Info.getRAngleLoc();
679   NumTemplateArgs = Info.size();
680 
681   for (unsigned i = 0; i != NumTemplateArgs; ++i) {
682     Deps |= Info[i].getArgument().getDependence();
683 
684     new (&OutArgArray[i]) TemplateArgumentLoc(Info[i]);
685   }
686 }
687 
688 void ASTTemplateKWAndArgsInfo::copyInto(const TemplateArgumentLoc *ArgArray,
689                                         TemplateArgumentListInfo &Info) const {
690   Info.setLAngleLoc(LAngleLoc);
691   Info.setRAngleLoc(RAngleLoc);
692   for (unsigned I = 0; I != NumTemplateArgs; ++I)
693     Info.addArgument(ArgArray[I]);
694 }
695