xref: /freebsd/contrib/llvm-project/clang/lib/ASTMatchers/ASTMatchersInternal.cpp (revision 77013d11e6483b970af25e13c9b892075742f7e5) 
1 //===- ASTMatchersInternal.cpp - Structural query framework ---------------===//
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 //  Implements the base layer of the matcher framework.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "clang/ASTMatchers/ASTMatchersInternal.h"
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/ASTTypeTraits.h"
16 #include "clang/AST/Decl.h"
17 #include "clang/AST/DeclTemplate.h"
18 #include "clang/AST/ParentMapContext.h"
19 #include "clang/AST/PrettyPrinter.h"
20 #include "clang/ASTMatchers/ASTMatchers.h"
21 #include "clang/Basic/LLVM.h"
22 #include "clang/Lex/Lexer.h"
23 #include "llvm/ADT/ArrayRef.h"
24 #include "llvm/ADT/IntrusiveRefCntPtr.h"
25 #include "llvm/ADT/None.h"
26 #include "llvm/ADT/SmallString.h"
27 #include "llvm/ADT/SmallVector.h"
28 #include "llvm/ADT/StringRef.h"
29 #include "llvm/Support/Casting.h"
30 #include "llvm/Support/ErrorHandling.h"
31 #include "llvm/Support/ManagedStatic.h"
32 #include "llvm/Support/Regex.h"
33 #include "llvm/Support/WithColor.h"
34 #include "llvm/Support/raw_ostream.h"
35 #include <algorithm>
36 #include <cassert>
37 #include <cstddef>
38 #include <string>
39 #include <utility>
40 #include <vector>
41 
42 namespace clang {
43 namespace ast_matchers {
44 
45 AST_MATCHER_P(ObjCMessageExpr, hasAnySelectorMatcher, std::vector<std::string>,
46               Matches) {
47   return llvm::is_contained(Matches, Node.getSelector().getAsString());
48 }
49 
50 namespace internal {
51 
52 static bool notUnaryOperator(const DynTypedNode &DynNode,
53                              ASTMatchFinder *Finder,
54                              BoundNodesTreeBuilder *Builder,
55                              ArrayRef<DynTypedMatcher> InnerMatchers);
56 
57 static bool allOfVariadicOperator(const DynTypedNode &DynNode,
58                                   ASTMatchFinder *Finder,
59                                   BoundNodesTreeBuilder *Builder,
60                                   ArrayRef<DynTypedMatcher> InnerMatchers);
61 
62 static bool eachOfVariadicOperator(const DynTypedNode &DynNode,
63                                    ASTMatchFinder *Finder,
64                                    BoundNodesTreeBuilder *Builder,
65                                    ArrayRef<DynTypedMatcher> InnerMatchers);
66 
67 static bool anyOfVariadicOperator(const DynTypedNode &DynNode,
68                                   ASTMatchFinder *Finder,
69                                   BoundNodesTreeBuilder *Builder,
70                                   ArrayRef<DynTypedMatcher> InnerMatchers);
71 
72 static bool optionallyVariadicOperator(const DynTypedNode &DynNode,
73                                        ASTMatchFinder *Finder,
74                                        BoundNodesTreeBuilder *Builder,
75                                        ArrayRef<DynTypedMatcher> InnerMatchers);
76 
77 bool matchesAnyBase(const CXXRecordDecl &Node,
78                     const Matcher<CXXBaseSpecifier> &BaseSpecMatcher,
79                     ASTMatchFinder *Finder, BoundNodesTreeBuilder *Builder) {
80   if (!Node.hasDefinition())
81     return false;
82 
83   CXXBasePaths Paths;
84   Paths.setOrigin(&Node);
85 
86   const auto basePredicate =
87       [Finder, Builder, &BaseSpecMatcher](const CXXBaseSpecifier *BaseSpec,
88                                           CXXBasePath &IgnoredParam) {
89         BoundNodesTreeBuilder Result(*Builder);
90         if (BaseSpecMatcher.matches(*BaseSpec, Finder, Builder)) {
91           *Builder = std::move(Result);
92           return true;
93         }
94         return false;
95       };
96 
97   return Node.lookupInBases(basePredicate, Paths,
98                             /*LookupInDependent =*/true);
99 }
100 
101 void BoundNodesTreeBuilder::visitMatches(Visitor *ResultVisitor) {
102   if (Bindings.empty())
103     Bindings.push_back(BoundNodesMap());
104   for (BoundNodesMap &Binding : Bindings) {
105     ResultVisitor->visitMatch(BoundNodes(Binding));
106   }
107 }
108 
109 namespace {
110 
111 using VariadicOperatorFunction = bool (*)(
112     const DynTypedNode &DynNode, ASTMatchFinder *Finder,
113     BoundNodesTreeBuilder *Builder, ArrayRef<DynTypedMatcher> InnerMatchers);
114 
115 template <VariadicOperatorFunction Func>
116 class VariadicMatcher : public DynMatcherInterface {
117 public:
118   VariadicMatcher(std::vector<DynTypedMatcher> InnerMatchers)
119       : InnerMatchers(std::move(InnerMatchers)) {}
120 
121   bool dynMatches(const DynTypedNode &DynNode, ASTMatchFinder *Finder,
122                   BoundNodesTreeBuilder *Builder) const override {
123     return Func(DynNode, Finder, Builder, InnerMatchers);
124   }
125 
126 private:
127   std::vector<DynTypedMatcher> InnerMatchers;
128 };
129 
130 class IdDynMatcher : public DynMatcherInterface {
131 public:
132   IdDynMatcher(StringRef ID,
133                IntrusiveRefCntPtr<DynMatcherInterface> InnerMatcher)
134       : ID(ID), InnerMatcher(std::move(InnerMatcher)) {}
135 
136   bool dynMatches(const DynTypedNode &DynNode, ASTMatchFinder *Finder,
137                   BoundNodesTreeBuilder *Builder) const override {
138     bool Result = InnerMatcher->dynMatches(DynNode, Finder, Builder);
139     if (Result) Builder->setBinding(ID, DynNode);
140     return Result;
141   }
142 
143   llvm::Optional<clang::TraversalKind> TraversalKind() const override {
144     return InnerMatcher->TraversalKind();
145   }
146 
147 private:
148   const std::string ID;
149   const IntrusiveRefCntPtr<DynMatcherInterface> InnerMatcher;
150 };
151 
152 /// A matcher that always returns true.
153 class TrueMatcherImpl : public DynMatcherInterface {
154 public:
155   TrueMatcherImpl() = default;
156 
157   bool dynMatches(const DynTypedNode &, ASTMatchFinder *,
158                   BoundNodesTreeBuilder *) const override {
159     return true;
160   }
161 };
162 
163 /// A matcher that specifies a particular \c TraversalKind.
164 ///
165 /// The kind provided to the constructor overrides any kind that may be
166 /// specified by the `InnerMatcher`.
167 class DynTraversalMatcherImpl : public DynMatcherInterface {
168 public:
169   explicit DynTraversalMatcherImpl(
170       clang::TraversalKind TK,
171       IntrusiveRefCntPtr<DynMatcherInterface> InnerMatcher)
172       : TK(TK), InnerMatcher(std::move(InnerMatcher)) {}
173 
174   bool dynMatches(const DynTypedNode &DynNode, ASTMatchFinder *Finder,
175                   BoundNodesTreeBuilder *Builder) const override {
176     return this->InnerMatcher->dynMatches(DynNode, Finder, Builder);
177   }
178 
179   llvm::Optional<clang::TraversalKind> TraversalKind() const override {
180     return TK;
181   }
182 
183 private:
184   clang::TraversalKind TK;
185   IntrusiveRefCntPtr<DynMatcherInterface> InnerMatcher;
186 };
187 
188 } // namespace
189 
190 bool ASTMatchFinder::isTraversalIgnoringImplicitNodes() const {
191   return getASTContext().getParentMapContext().getTraversalKind() ==
192          TK_IgnoreUnlessSpelledInSource;
193 }
194 
195 DynTypedMatcher
196 DynTypedMatcher::constructVariadic(DynTypedMatcher::VariadicOperator Op,
197                                    ASTNodeKind SupportedKind,
198                                    std::vector<DynTypedMatcher> InnerMatchers) {
199   assert(!InnerMatchers.empty() && "Array must not be empty.");
200   assert(llvm::all_of(InnerMatchers,
201                       [SupportedKind](const DynTypedMatcher &M) {
202                         return M.canConvertTo(SupportedKind);
203                       }) &&
204          "InnerMatchers must be convertible to SupportedKind!");
205 
206   // We must relax the restrict kind here.
207   // The different operators might deal differently with a mismatch.
208   // Make it the same as SupportedKind, since that is the broadest type we are
209   // allowed to accept.
210   auto RestrictKind = SupportedKind;
211 
212   switch (Op) {
213   case VO_AllOf:
214     // In the case of allOf() we must pass all the checks, so making
215     // RestrictKind the most restrictive can save us time. This way we reject
216     // invalid types earlier and we can elide the kind checks inside the
217     // matcher.
218     for (auto &IM : InnerMatchers) {
219       RestrictKind =
220           ASTNodeKind::getMostDerivedType(RestrictKind, IM.RestrictKind);
221     }
222     return DynTypedMatcher(
223         SupportedKind, RestrictKind,
224         new VariadicMatcher<allOfVariadicOperator>(std::move(InnerMatchers)));
225 
226   case VO_AnyOf:
227     return DynTypedMatcher(
228         SupportedKind, RestrictKind,
229         new VariadicMatcher<anyOfVariadicOperator>(std::move(InnerMatchers)));
230 
231   case VO_EachOf:
232     return DynTypedMatcher(
233         SupportedKind, RestrictKind,
234         new VariadicMatcher<eachOfVariadicOperator>(std::move(InnerMatchers)));
235 
236   case VO_Optionally:
237     return DynTypedMatcher(SupportedKind, RestrictKind,
238                            new VariadicMatcher<optionallyVariadicOperator>(
239                                std::move(InnerMatchers)));
240 
241   case VO_UnaryNot:
242     // FIXME: Implement the Not operator to take a single matcher instead of a
243     // vector.
244     return DynTypedMatcher(
245         SupportedKind, RestrictKind,
246         new VariadicMatcher<notUnaryOperator>(std::move(InnerMatchers)));
247   }
248   llvm_unreachable("Invalid Op value.");
249 }
250 
251 DynTypedMatcher
252 DynTypedMatcher::constructRestrictedWrapper(const DynTypedMatcher &InnerMatcher,
253                                             ASTNodeKind RestrictKind) {
254   DynTypedMatcher Copy = InnerMatcher;
255   Copy.RestrictKind = RestrictKind;
256   return Copy;
257 }
258 
259 DynTypedMatcher DynTypedMatcher::withTraversalKind(TraversalKind TK) {
260   auto Copy = *this;
261   Copy.Implementation =
262       new DynTraversalMatcherImpl(TK, std::move(Copy.Implementation));
263   return Copy;
264 }
265 
266 DynTypedMatcher DynTypedMatcher::trueMatcher(ASTNodeKind NodeKind) {
267   // We only ever need one instance of TrueMatcherImpl, so we create a static
268   // instance and reuse it to reduce the overhead of the matcher and increase
269   // the chance of cache hits.
270   static const llvm::IntrusiveRefCntPtr<TrueMatcherImpl> Instance =
271       new TrueMatcherImpl();
272   return DynTypedMatcher(NodeKind, NodeKind, Instance);
273 }
274 
275 bool DynTypedMatcher::canMatchNodesOfKind(ASTNodeKind Kind) const {
276   return RestrictKind.isBaseOf(Kind);
277 }
278 
279 DynTypedMatcher DynTypedMatcher::dynCastTo(const ASTNodeKind Kind) const {
280   auto Copy = *this;
281   Copy.SupportedKind = Kind;
282   Copy.RestrictKind = ASTNodeKind::getMostDerivedType(Kind, RestrictKind);
283   return Copy;
284 }
285 
286 bool DynTypedMatcher::matches(const DynTypedNode &DynNode,
287                               ASTMatchFinder *Finder,
288                               BoundNodesTreeBuilder *Builder) const {
289   TraversalKindScope RAII(Finder->getASTContext(),
290                           Implementation->TraversalKind());
291 
292   if (Finder->isTraversalIgnoringImplicitNodes() &&
293       Finder->IsMatchingInASTNodeNotSpelledInSource())
294     return false;
295 
296   if (!Finder->isTraversalIgnoringImplicitNodes() &&
297       Finder->IsMatchingInASTNodeNotAsIs())
298     return false;
299 
300   auto N =
301       Finder->getASTContext().getParentMapContext().traverseIgnored(DynNode);
302 
303   if (RestrictKind.isBaseOf(N.getNodeKind()) &&
304       Implementation->dynMatches(N, Finder, Builder)) {
305     return true;
306   }
307   // Delete all bindings when a matcher does not match.
308   // This prevents unexpected exposure of bound nodes in unmatches
309   // branches of the match tree.
310   Builder->removeBindings([](const BoundNodesMap &) { return true; });
311   return false;
312 }
313 
314 bool DynTypedMatcher::matchesNoKindCheck(const DynTypedNode &DynNode,
315                                          ASTMatchFinder *Finder,
316                                          BoundNodesTreeBuilder *Builder) const {
317   TraversalKindScope raii(Finder->getASTContext(),
318                           Implementation->TraversalKind());
319 
320   if (Finder->isTraversalIgnoringImplicitNodes() &&
321       Finder->IsMatchingInASTNodeNotSpelledInSource())
322     return false;
323 
324   if (!Finder->isTraversalIgnoringImplicitNodes() &&
325       Finder->IsMatchingInASTNodeNotAsIs())
326     return false;
327 
328   auto N =
329       Finder->getASTContext().getParentMapContext().traverseIgnored(DynNode);
330 
331   assert(RestrictKind.isBaseOf(N.getNodeKind()));
332   if (Implementation->dynMatches(N, Finder, Builder)) {
333     return true;
334   }
335   // Delete all bindings when a matcher does not match.
336   // This prevents unexpected exposure of bound nodes in unmatches
337   // branches of the match tree.
338   Builder->removeBindings([](const BoundNodesMap &) { return true; });
339   return false;
340 }
341 
342 llvm::Optional<DynTypedMatcher> DynTypedMatcher::tryBind(StringRef ID) const {
343   if (!AllowBind) return llvm::None;
344   auto Result = *this;
345   Result.Implementation =
346       new IdDynMatcher(ID, std::move(Result.Implementation));
347   return std::move(Result);
348 }
349 
350 bool DynTypedMatcher::canConvertTo(ASTNodeKind To) const {
351   const auto From = getSupportedKind();
352   auto QualKind = ASTNodeKind::getFromNodeKind<QualType>();
353   auto TypeKind = ASTNodeKind::getFromNodeKind<Type>();
354   /// Mimic the implicit conversions of Matcher<>.
355   /// - From Matcher<Type> to Matcher<QualType>
356   if (From.isSame(TypeKind) && To.isSame(QualKind)) return true;
357   /// - From Matcher<Base> to Matcher<Derived>
358   return From.isBaseOf(To);
359 }
360 
361 void BoundNodesTreeBuilder::addMatch(const BoundNodesTreeBuilder &Other) {
362   Bindings.append(Other.Bindings.begin(), Other.Bindings.end());
363 }
364 
365 static bool notUnaryOperator(const DynTypedNode &DynNode,
366                              ASTMatchFinder *Finder,
367                              BoundNodesTreeBuilder *Builder,
368                              ArrayRef<DynTypedMatcher> InnerMatchers) {
369   if (InnerMatchers.size() != 1)
370     return false;
371 
372   // The 'unless' matcher will always discard the result:
373   // If the inner matcher doesn't match, unless returns true,
374   // but the inner matcher cannot have bound anything.
375   // If the inner matcher matches, the result is false, and
376   // any possible binding will be discarded.
377   // We still need to hand in all the bound nodes up to this
378   // point so the inner matcher can depend on bound nodes,
379   // and we need to actively discard the bound nodes, otherwise
380   // the inner matcher will reset the bound nodes if it doesn't
381   // match, but this would be inversed by 'unless'.
382   BoundNodesTreeBuilder Discard(*Builder);
383   return !InnerMatchers[0].matches(DynNode, Finder, &Discard);
384 }
385 
386 static bool allOfVariadicOperator(const DynTypedNode &DynNode,
387                                   ASTMatchFinder *Finder,
388                                   BoundNodesTreeBuilder *Builder,
389                                   ArrayRef<DynTypedMatcher> InnerMatchers) {
390   // allOf leads to one matcher for each alternative in the first
391   // matcher combined with each alternative in the second matcher.
392   // Thus, we can reuse the same Builder.
393   return llvm::all_of(InnerMatchers, [&](const DynTypedMatcher &InnerMatcher) {
394     return InnerMatcher.matchesNoKindCheck(DynNode, Finder, Builder);
395   });
396 }
397 
398 static bool eachOfVariadicOperator(const DynTypedNode &DynNode,
399                                    ASTMatchFinder *Finder,
400                                    BoundNodesTreeBuilder *Builder,
401                                    ArrayRef<DynTypedMatcher> InnerMatchers) {
402   BoundNodesTreeBuilder Result;
403   bool Matched = false;
404   for (const DynTypedMatcher &InnerMatcher : InnerMatchers) {
405     BoundNodesTreeBuilder BuilderInner(*Builder);
406     if (InnerMatcher.matches(DynNode, Finder, &BuilderInner)) {
407       Matched = true;
408       Result.addMatch(BuilderInner);
409     }
410   }
411   *Builder = std::move(Result);
412   return Matched;
413 }
414 
415 static bool anyOfVariadicOperator(const DynTypedNode &DynNode,
416                                   ASTMatchFinder *Finder,
417                                   BoundNodesTreeBuilder *Builder,
418                                   ArrayRef<DynTypedMatcher> InnerMatchers) {
419   for (const DynTypedMatcher &InnerMatcher : InnerMatchers) {
420     BoundNodesTreeBuilder Result = *Builder;
421     if (InnerMatcher.matches(DynNode, Finder, &Result)) {
422       *Builder = std::move(Result);
423       return true;
424     }
425   }
426   return false;
427 }
428 
429 static bool
430 optionallyVariadicOperator(const DynTypedNode &DynNode, ASTMatchFinder *Finder,
431                            BoundNodesTreeBuilder *Builder,
432                            ArrayRef<DynTypedMatcher> InnerMatchers) {
433   if (InnerMatchers.size() != 1)
434     return false;
435 
436   BoundNodesTreeBuilder Result(*Builder);
437   if (InnerMatchers[0].matches(DynNode, Finder, &Result))
438     *Builder = std::move(Result);
439   return true;
440 }
441 
442 inline static
443 std::vector<std::string> vectorFromRefs(ArrayRef<const StringRef *> NameRefs) {
444   std::vector<std::string> Names;
445   Names.reserve(NameRefs.size());
446   for (auto *Name : NameRefs)
447     Names.emplace_back(*Name);
448   return Names;
449 }
450 
451 Matcher<NamedDecl> hasAnyNameFunc(ArrayRef<const StringRef *> NameRefs) {
452   return internal::Matcher<NamedDecl>(
453       new internal::HasNameMatcher(vectorFromRefs(NameRefs)));
454 }
455 
456 Matcher<ObjCMessageExpr> hasAnySelectorFunc(
457     ArrayRef<const StringRef *> NameRefs) {
458   return hasAnySelectorMatcher(vectorFromRefs(NameRefs));
459 }
460 
461 HasOpNameMatcher hasAnyOperatorNameFunc(ArrayRef<const StringRef *> NameRefs) {
462   return HasOpNameMatcher(vectorFromRefs(NameRefs));
463 }
464 
465 HasOverloadOpNameMatcher
466 hasAnyOverloadedOperatorNameFunc(ArrayRef<const StringRef *> NameRefs) {
467   return HasOverloadOpNameMatcher(vectorFromRefs(NameRefs));
468 }
469 
470 HasNameMatcher::HasNameMatcher(std::vector<std::string> N)
471     : UseUnqualifiedMatch(llvm::all_of(
472           N, [](StringRef Name) { return Name.find("::") == Name.npos; })),
473       Names(std::move(N)) {
474 #ifndef NDEBUG
475   for (StringRef Name : Names)
476     assert(!Name.empty());
477 #endif
478 }
479 
480 static bool consumeNameSuffix(StringRef &FullName, StringRef Suffix) {
481   StringRef Name = FullName;
482   if (!Name.endswith(Suffix))
483     return false;
484   Name = Name.drop_back(Suffix.size());
485   if (!Name.empty()) {
486     if (!Name.endswith("::"))
487       return false;
488     Name = Name.drop_back(2);
489   }
490   FullName = Name;
491   return true;
492 }
493 
494 static StringRef getNodeName(const NamedDecl &Node,
495                              llvm::SmallString<128> &Scratch) {
496   // Simple name.
497   if (Node.getIdentifier())
498     return Node.getName();
499 
500   if (Node.getDeclName()) {
501     // Name needs to be constructed.
502     Scratch.clear();
503     llvm::raw_svector_ostream OS(Scratch);
504     Node.printName(OS);
505     return OS.str();
506   }
507 
508   return "(anonymous)";
509 }
510 
511 static StringRef getNodeName(const RecordDecl &Node,
512                              llvm::SmallString<128> &Scratch) {
513   if (Node.getIdentifier()) {
514     return Node.getName();
515   }
516   Scratch.clear();
517   return ("(anonymous " + Node.getKindName() + ")").toStringRef(Scratch);
518 }
519 
520 static StringRef getNodeName(const NamespaceDecl &Node,
521                              llvm::SmallString<128> &Scratch) {
522   return Node.isAnonymousNamespace() ? "(anonymous namespace)" : Node.getName();
523 }
524 
525 namespace {
526 
527 class PatternSet {
528 public:
529   PatternSet(ArrayRef<std::string> Names) {
530     Patterns.reserve(Names.size());
531     for (StringRef Name : Names)
532       Patterns.push_back({Name, Name.startswith("::")});
533   }
534 
535   /// Consumes the name suffix from each pattern in the set and removes the ones
536   /// that didn't match.
537   /// Return true if there are still any patterns left.
538   bool consumeNameSuffix(StringRef NodeName, bool CanSkip) {
539     for (size_t I = 0; I < Patterns.size();) {
540       if (::clang::ast_matchers::internal::consumeNameSuffix(Patterns[I].P,
541                                                              NodeName) ||
542           CanSkip) {
543         ++I;
544       } else {
545         Patterns.erase(Patterns.begin() + I);
546       }
547     }
548     return !Patterns.empty();
549   }
550 
551   /// Check if any of the patterns are a match.
552   /// A match will be a pattern that was fully consumed, that also matches the
553   /// 'fully qualified' requirement.
554   bool foundMatch(bool AllowFullyQualified) const {
555     return llvm::any_of(Patterns, [&](const Pattern &Pattern) {
556       return Pattern.P.empty() &&
557              (AllowFullyQualified || !Pattern.IsFullyQualified);
558     });
559   }
560 
561 private:
562   struct Pattern {
563     StringRef P;
564     bool IsFullyQualified;
565   };
566 
567   llvm::SmallVector<Pattern, 8> Patterns;
568 };
569 
570 } // namespace
571 
572 bool HasNameMatcher::matchesNodeUnqualified(const NamedDecl &Node) const {
573   assert(UseUnqualifiedMatch);
574   llvm::SmallString<128> Scratch;
575   StringRef NodeName = getNodeName(Node, Scratch);
576   return llvm::any_of(Names, [&](StringRef Name) {
577     return consumeNameSuffix(Name, NodeName) && Name.empty();
578   });
579 }
580 
581 bool HasNameMatcher::matchesNodeFullFast(const NamedDecl &Node) const {
582   PatternSet Patterns(Names);
583   llvm::SmallString<128> Scratch;
584 
585   // This function is copied and adapted from NamedDecl::printQualifiedName()
586   // By matching each part individually we optimize in a couple of ways:
587   //  - We can exit early on the first failure.
588   //  - We can skip inline/anonymous namespaces without another pass.
589   //  - We print one name at a time, reducing the chance of overflowing the
590   //    inlined space of the SmallString.
591 
592   // First, match the name.
593   if (!Patterns.consumeNameSuffix(getNodeName(Node, Scratch),
594                                   /*CanSkip=*/false))
595     return false;
596 
597   // Try to match each declaration context.
598   // We are allowed to skip anonymous and inline namespaces if they don't match.
599   const DeclContext *Ctx = Node.getDeclContext();
600 
601   if (Ctx->isFunctionOrMethod())
602     return Patterns.foundMatch(/*AllowFullyQualified=*/false);
603 
604   for (; Ctx; Ctx = Ctx->getParent()) {
605     // Linkage Spec can just be ignored
606     // FIXME: Any other DeclContext kinds that can be safely disregarded
607     if (isa<LinkageSpecDecl>(Ctx))
608       continue;
609     if (!isa<NamedDecl>(Ctx))
610       break;
611     if (Patterns.foundMatch(/*AllowFullyQualified=*/false))
612       return true;
613 
614     if (const auto *ND = dyn_cast<NamespaceDecl>(Ctx)) {
615       // If it matches (or we can skip it), continue.
616       if (Patterns.consumeNameSuffix(getNodeName(*ND, Scratch),
617                                      /*CanSkip=*/ND->isAnonymousNamespace() ||
618                                          ND->isInline()))
619         continue;
620       return false;
621     }
622     if (const auto *RD = dyn_cast<RecordDecl>(Ctx)) {
623       if (!isa<ClassTemplateSpecializationDecl>(Ctx)) {
624         if (Patterns.consumeNameSuffix(getNodeName(*RD, Scratch),
625                                        /*CanSkip=*/false))
626           continue;
627 
628         return false;
629       }
630     }
631 
632     // We don't know how to deal with this DeclContext.
633     // Fallback to the slow version of the code.
634     return matchesNodeFullSlow(Node);
635   }
636 
637   return Patterns.foundMatch(/*AllowFullyQualified=*/true);
638 }
639 
640 bool HasNameMatcher::matchesNodeFullSlow(const NamedDecl &Node) const {
641   const bool SkipUnwrittenCases[] = {false, true};
642   for (bool SkipUnwritten : SkipUnwrittenCases) {
643     llvm::SmallString<128> NodeName = StringRef("::");
644     llvm::raw_svector_ostream OS(NodeName);
645 
646     PrintingPolicy Policy = Node.getASTContext().getPrintingPolicy();
647     Policy.SuppressUnwrittenScope = SkipUnwritten;
648     Policy.SuppressInlineNamespace = SkipUnwritten;
649     Node.printQualifiedName(OS, Policy);
650 
651     const StringRef FullName = OS.str();
652 
653     for (const StringRef Pattern : Names) {
654       if (Pattern.startswith("::")) {
655         if (FullName == Pattern)
656           return true;
657       } else if (FullName.endswith(Pattern) &&
658                  FullName.drop_back(Pattern.size()).endswith("::")) {
659         return true;
660       }
661     }
662   }
663 
664   return false;
665 }
666 
667 bool HasNameMatcher::matchesNode(const NamedDecl &Node) const {
668   assert(matchesNodeFullFast(Node) == matchesNodeFullSlow(Node));
669   if (UseUnqualifiedMatch) {
670     assert(matchesNodeUnqualified(Node) == matchesNodeFullFast(Node));
671     return matchesNodeUnqualified(Node);
672   }
673   return matchesNodeFullFast(Node);
674 }
675 
676 // Checks whether \p Loc points to a token with source text of \p TokenText.
677 static bool isTokenAtLoc(const SourceManager &SM, const LangOptions &LangOpts,
678                          StringRef Text, SourceLocation Loc) {
679   llvm::SmallString<16> Buffer;
680   bool Invalid = false;
681   // Since `Loc` may point into an expansion buffer, which has no corresponding
682   // source, we need to look at the spelling location to read the actual source.
683   StringRef TokenText = Lexer::getSpelling(SM.getSpellingLoc(Loc), Buffer, SM,
684                                            LangOpts, &Invalid);
685   return !Invalid && Text == TokenText;
686 }
687 
688 llvm::Optional<SourceLocation>
689 getExpansionLocOfMacro(StringRef MacroName, SourceLocation Loc,
690                        const ASTContext &Context) {
691   auto &SM = Context.getSourceManager();
692   const LangOptions &LangOpts = Context.getLangOpts();
693   while (Loc.isMacroID()) {
694     SrcMgr::ExpansionInfo Expansion =
695         SM.getSLocEntry(SM.getFileID(Loc)).getExpansion();
696     if (Expansion.isMacroArgExpansion())
697       // Check macro argument for an expansion of the given macro. For example,
698       // `F(G(3))`, where `MacroName` is `G`.
699       if (llvm::Optional<SourceLocation> ArgLoc = getExpansionLocOfMacro(
700               MacroName, Expansion.getSpellingLoc(), Context))
701         return ArgLoc;
702     Loc = Expansion.getExpansionLocStart();
703     if (isTokenAtLoc(SM, LangOpts, MacroName, Loc))
704       return Loc;
705   }
706   return llvm::None;
707 }
708 
709 std::shared_ptr<llvm::Regex> createAndVerifyRegex(StringRef Regex,
710                                                   llvm::Regex::RegexFlags Flags,
711                                                   StringRef MatcherID) {
712   assert(!Regex.empty() && "Empty regex string");
713   auto SharedRegex = std::make_shared<llvm::Regex>(Regex, Flags);
714   std::string Error;
715   if (!SharedRegex->isValid(Error)) {
716     llvm::WithColor::error()
717         << "building matcher '" << MatcherID << "': " << Error << "\n";
718     llvm::WithColor::note() << " input was '" << Regex << "'\n";
719   }
720   return SharedRegex;
721 }
722 } // end namespace internal
723 
724 const internal::VariadicDynCastAllOfMatcher<Stmt, ObjCAutoreleasePoolStmt>
725     autoreleasePoolStmt;
726 const internal::VariadicDynCastAllOfMatcher<Decl, TranslationUnitDecl>
727     translationUnitDecl;
728 const internal::VariadicDynCastAllOfMatcher<Decl, TypedefDecl> typedefDecl;
729 const internal::VariadicDynCastAllOfMatcher<Decl, TypedefNameDecl>
730     typedefNameDecl;
731 const internal::VariadicDynCastAllOfMatcher<Decl, TypeAliasDecl> typeAliasDecl;
732 const internal::VariadicDynCastAllOfMatcher<Decl, TypeAliasTemplateDecl>
733     typeAliasTemplateDecl;
734 const internal::VariadicAllOfMatcher<Decl> decl;
735 const internal::VariadicDynCastAllOfMatcher<Decl, DecompositionDecl> decompositionDecl;
736 const internal::VariadicDynCastAllOfMatcher<Decl, LinkageSpecDecl>
737     linkageSpecDecl;
738 const internal::VariadicDynCastAllOfMatcher<Decl, NamedDecl> namedDecl;
739 const internal::VariadicDynCastAllOfMatcher<Decl, LabelDecl> labelDecl;
740 const internal::VariadicDynCastAllOfMatcher<Decl, NamespaceDecl> namespaceDecl;
741 const internal::VariadicDynCastAllOfMatcher<Decl, NamespaceAliasDecl>
742     namespaceAliasDecl;
743 const internal::VariadicDynCastAllOfMatcher<Decl, RecordDecl> recordDecl;
744 const internal::VariadicDynCastAllOfMatcher<Decl, CXXRecordDecl> cxxRecordDecl;
745 const internal::VariadicDynCastAllOfMatcher<Decl, ClassTemplateDecl>
746     classTemplateDecl;
747 const internal::VariadicDynCastAllOfMatcher<Decl,
748                                             ClassTemplateSpecializationDecl>
749     classTemplateSpecializationDecl;
750 const internal::VariadicDynCastAllOfMatcher<
751     Decl, ClassTemplatePartialSpecializationDecl>
752     classTemplatePartialSpecializationDecl;
753 const internal::VariadicDynCastAllOfMatcher<Decl, DeclaratorDecl>
754     declaratorDecl;
755 const internal::VariadicDynCastAllOfMatcher<Decl, ParmVarDecl> parmVarDecl;
756 const internal::VariadicDynCastAllOfMatcher<Decl, AccessSpecDecl>
757     accessSpecDecl;
758 const internal::VariadicAllOfMatcher<CXXCtorInitializer> cxxCtorInitializer;
759 const internal::VariadicAllOfMatcher<TemplateArgument> templateArgument;
760 const internal::VariadicAllOfMatcher<TemplateArgumentLoc> templateArgumentLoc;
761 const internal::VariadicAllOfMatcher<TemplateName> templateName;
762 const internal::VariadicDynCastAllOfMatcher<Decl, NonTypeTemplateParmDecl>
763     nonTypeTemplateParmDecl;
764 const internal::VariadicDynCastAllOfMatcher<Decl, TemplateTypeParmDecl>
765     templateTypeParmDecl;
766 const internal::VariadicDynCastAllOfMatcher<Decl, TemplateTemplateParmDecl>
767     templateTemplateParmDecl;
768 
769 const internal::VariadicAllOfMatcher<QualType> qualType;
770 const internal::VariadicAllOfMatcher<Type> type;
771 const internal::VariadicAllOfMatcher<TypeLoc> typeLoc;
772 const internal::VariadicDynCastAllOfMatcher<Stmt, UnaryExprOrTypeTraitExpr>
773     unaryExprOrTypeTraitExpr;
774 const internal::VariadicDynCastAllOfMatcher<Decl, ValueDecl> valueDecl;
775 const internal::VariadicDynCastAllOfMatcher<Decl, CXXConstructorDecl>
776     cxxConstructorDecl;
777 const internal::VariadicDynCastAllOfMatcher<Decl, CXXDestructorDecl>
778     cxxDestructorDecl;
779 const internal::VariadicDynCastAllOfMatcher<Decl, EnumDecl> enumDecl;
780 const internal::VariadicDynCastAllOfMatcher<Decl, EnumConstantDecl>
781     enumConstantDecl;
782 const internal::VariadicDynCastAllOfMatcher<Decl, TagDecl> tagDecl;
783 const internal::VariadicDynCastAllOfMatcher<Decl, CXXMethodDecl> cxxMethodDecl;
784 const internal::VariadicDynCastAllOfMatcher<Decl, CXXConversionDecl>
785     cxxConversionDecl;
786 const internal::VariadicDynCastAllOfMatcher<Decl, VarDecl> varDecl;
787 const internal::VariadicDynCastAllOfMatcher<Decl, FieldDecl> fieldDecl;
788 const internal::VariadicDynCastAllOfMatcher<Decl, IndirectFieldDecl>
789     indirectFieldDecl;
790 const internal::VariadicDynCastAllOfMatcher<Decl, FunctionDecl> functionDecl;
791 const internal::VariadicDynCastAllOfMatcher<Decl, FunctionTemplateDecl>
792     functionTemplateDecl;
793 const internal::VariadicDynCastAllOfMatcher<Decl, FriendDecl> friendDecl;
794 const internal::VariadicAllOfMatcher<Stmt> stmt;
795 const internal::VariadicDynCastAllOfMatcher<Stmt, DeclStmt> declStmt;
796 const internal::VariadicDynCastAllOfMatcher<Stmt, MemberExpr> memberExpr;
797 const internal::VariadicDynCastAllOfMatcher<Stmt, UnresolvedMemberExpr>
798     unresolvedMemberExpr;
799 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXDependentScopeMemberExpr>
800     cxxDependentScopeMemberExpr;
801 const internal::VariadicDynCastAllOfMatcher<Stmt, CallExpr> callExpr;
802 const internal::VariadicDynCastAllOfMatcher<Stmt, LambdaExpr> lambdaExpr;
803 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXMemberCallExpr>
804     cxxMemberCallExpr;
805 const internal::VariadicDynCastAllOfMatcher<Stmt, ObjCMessageExpr>
806     objcMessageExpr;
807 const internal::VariadicDynCastAllOfMatcher<Decl, ObjCInterfaceDecl>
808     objcInterfaceDecl;
809 const internal::VariadicDynCastAllOfMatcher<Decl, ObjCImplementationDecl>
810     objcImplementationDecl;
811 const internal::VariadicDynCastAllOfMatcher<Decl, ObjCProtocolDecl>
812     objcProtocolDecl;
813 const internal::VariadicDynCastAllOfMatcher<Decl, ObjCCategoryDecl>
814     objcCategoryDecl;
815 const internal::VariadicDynCastAllOfMatcher<Decl, ObjCCategoryImplDecl>
816     objcCategoryImplDecl;
817 const internal::VariadicDynCastAllOfMatcher<Decl, ObjCMethodDecl>
818     objcMethodDecl;
819 const internal::VariadicDynCastAllOfMatcher<Decl, BlockDecl>
820     blockDecl;
821 const internal::VariadicDynCastAllOfMatcher<Decl, ObjCIvarDecl> objcIvarDecl;
822 const internal::VariadicDynCastAllOfMatcher<Decl, ObjCPropertyDecl>
823     objcPropertyDecl;
824 const internal::VariadicDynCastAllOfMatcher<Stmt, ObjCAtThrowStmt>
825     objcThrowStmt;
826 const internal::VariadicDynCastAllOfMatcher<Stmt, ObjCAtTryStmt> objcTryStmt;
827 const internal::VariadicDynCastAllOfMatcher<Stmt, ObjCAtCatchStmt>
828     objcCatchStmt;
829 const internal::VariadicDynCastAllOfMatcher<Stmt, ObjCAtFinallyStmt>
830     objcFinallyStmt;
831 const internal::VariadicDynCastAllOfMatcher<Stmt, ExprWithCleanups>
832     exprWithCleanups;
833 const internal::VariadicDynCastAllOfMatcher<Stmt, InitListExpr> initListExpr;
834 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXStdInitializerListExpr>
835     cxxStdInitializerListExpr;
836 const internal::VariadicDynCastAllOfMatcher<Stmt, ImplicitValueInitExpr>
837     implicitValueInitExpr;
838 const internal::VariadicDynCastAllOfMatcher<Stmt, ParenListExpr> parenListExpr;
839 const internal::VariadicDynCastAllOfMatcher<Stmt, SubstNonTypeTemplateParmExpr>
840     substNonTypeTemplateParmExpr;
841 const internal::VariadicDynCastAllOfMatcher<Decl, UsingDecl> usingDecl;
842 const internal::VariadicDynCastAllOfMatcher<Decl, UsingDirectiveDecl>
843     usingDirectiveDecl;
844 const internal::VariadicDynCastAllOfMatcher<Stmt, UnresolvedLookupExpr>
845     unresolvedLookupExpr;
846 const internal::VariadicDynCastAllOfMatcher<Decl, UnresolvedUsingValueDecl>
847     unresolvedUsingValueDecl;
848 const internal::VariadicDynCastAllOfMatcher<Decl, UnresolvedUsingTypenameDecl>
849     unresolvedUsingTypenameDecl;
850 const internal::VariadicDynCastAllOfMatcher<Stmt, ConstantExpr> constantExpr;
851 const internal::VariadicDynCastAllOfMatcher<Stmt, ParenExpr> parenExpr;
852 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXConstructExpr>
853     cxxConstructExpr;
854 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXUnresolvedConstructExpr>
855     cxxUnresolvedConstructExpr;
856 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXThisExpr> cxxThisExpr;
857 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXBindTemporaryExpr>
858     cxxBindTemporaryExpr;
859 const internal::VariadicDynCastAllOfMatcher<Stmt, MaterializeTemporaryExpr>
860     materializeTemporaryExpr;
861 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXNewExpr> cxxNewExpr;
862 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXDeleteExpr> cxxDeleteExpr;
863 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXNoexceptExpr>
864     cxxNoexceptExpr;
865 const internal::VariadicDynCastAllOfMatcher<Stmt, ArraySubscriptExpr>
866     arraySubscriptExpr;
867 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXDefaultArgExpr>
868     cxxDefaultArgExpr;
869 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXOperatorCallExpr>
870     cxxOperatorCallExpr;
871 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXRewrittenBinaryOperator>
872     cxxRewrittenBinaryOperator;
873 const internal::VariadicDynCastAllOfMatcher<Stmt, Expr> expr;
874 const internal::VariadicDynCastAllOfMatcher<Stmt, DeclRefExpr> declRefExpr;
875 const internal::VariadicDynCastAllOfMatcher<Stmt, ObjCIvarRefExpr> objcIvarRefExpr;
876 const internal::VariadicDynCastAllOfMatcher<Stmt, BlockExpr> blockExpr;
877 const internal::VariadicDynCastAllOfMatcher<Stmt, IfStmt> ifStmt;
878 const internal::VariadicDynCastAllOfMatcher<Stmt, ForStmt> forStmt;
879 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXForRangeStmt>
880     cxxForRangeStmt;
881 const internal::VariadicDynCastAllOfMatcher<Stmt, WhileStmt> whileStmt;
882 const internal::VariadicDynCastAllOfMatcher<Stmt, DoStmt> doStmt;
883 const internal::VariadicDynCastAllOfMatcher<Stmt, BreakStmt> breakStmt;
884 const internal::VariadicDynCastAllOfMatcher<Stmt, ContinueStmt> continueStmt;
885 const internal::VariadicDynCastAllOfMatcher<Stmt, ReturnStmt> returnStmt;
886 const internal::VariadicDynCastAllOfMatcher<Stmt, GotoStmt> gotoStmt;
887 const internal::VariadicDynCastAllOfMatcher<Stmt, LabelStmt> labelStmt;
888 const internal::VariadicDynCastAllOfMatcher<Stmt, AddrLabelExpr> addrLabelExpr;
889 const internal::VariadicDynCastAllOfMatcher<Stmt, SwitchStmt> switchStmt;
890 const internal::VariadicDynCastAllOfMatcher<Stmt, SwitchCase> switchCase;
891 const internal::VariadicDynCastAllOfMatcher<Stmt, CaseStmt> caseStmt;
892 const internal::VariadicDynCastAllOfMatcher<Stmt, DefaultStmt> defaultStmt;
893 const internal::VariadicDynCastAllOfMatcher<Stmt, CompoundStmt> compoundStmt;
894 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXCatchStmt> cxxCatchStmt;
895 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXTryStmt> cxxTryStmt;
896 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXThrowExpr> cxxThrowExpr;
897 const internal::VariadicDynCastAllOfMatcher<Stmt, NullStmt> nullStmt;
898 const internal::VariadicDynCastAllOfMatcher<Stmt, AsmStmt> asmStmt;
899 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXBoolLiteralExpr>
900     cxxBoolLiteral;
901 const internal::VariadicDynCastAllOfMatcher<Stmt, StringLiteral> stringLiteral;
902 const internal::VariadicDynCastAllOfMatcher<Stmt, CharacterLiteral>
903     characterLiteral;
904 const internal::VariadicDynCastAllOfMatcher<Stmt, IntegerLiteral>
905     integerLiteral;
906 const internal::VariadicDynCastAllOfMatcher<Stmt, FloatingLiteral> floatLiteral;
907 const internal::VariadicDynCastAllOfMatcher<Stmt, ImaginaryLiteral> imaginaryLiteral;
908 const internal::VariadicDynCastAllOfMatcher<Stmt, FixedPointLiteral>
909     fixedPointLiteral;
910 const internal::VariadicDynCastAllOfMatcher<Stmt, UserDefinedLiteral>
911     userDefinedLiteral;
912 const internal::VariadicDynCastAllOfMatcher<Stmt, CompoundLiteralExpr>
913     compoundLiteralExpr;
914 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXNullPtrLiteralExpr>
915     cxxNullPtrLiteralExpr;
916 const internal::VariadicDynCastAllOfMatcher<Stmt, ChooseExpr> chooseExpr;
917 const internal::VariadicDynCastAllOfMatcher<Stmt, GNUNullExpr> gnuNullExpr;
918 const internal::VariadicDynCastAllOfMatcher<Stmt, GenericSelectionExpr>
919     genericSelectionExpr;
920 const internal::VariadicDynCastAllOfMatcher<Stmt, AtomicExpr> atomicExpr;
921 const internal::VariadicDynCastAllOfMatcher<Stmt, StmtExpr> stmtExpr;
922 const internal::VariadicDynCastAllOfMatcher<Stmt, BinaryOperator>
923     binaryOperator;
924 const internal::MapAnyOfMatcher<BinaryOperator, CXXOperatorCallExpr,
925                                 CXXRewrittenBinaryOperator>
926     binaryOperation;
927 const internal::VariadicDynCastAllOfMatcher<Stmt, UnaryOperator> unaryOperator;
928 const internal::VariadicDynCastAllOfMatcher<Stmt, ConditionalOperator>
929     conditionalOperator;
930 const internal::VariadicDynCastAllOfMatcher<Stmt, BinaryConditionalOperator>
931     binaryConditionalOperator;
932 const internal::VariadicDynCastAllOfMatcher<Stmt, OpaqueValueExpr>
933     opaqueValueExpr;
934 const internal::VariadicDynCastAllOfMatcher<Decl, StaticAssertDecl>
935     staticAssertDecl;
936 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXReinterpretCastExpr>
937     cxxReinterpretCastExpr;
938 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXStaticCastExpr>
939     cxxStaticCastExpr;
940 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXDynamicCastExpr>
941     cxxDynamicCastExpr;
942 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXConstCastExpr>
943     cxxConstCastExpr;
944 const internal::VariadicDynCastAllOfMatcher<Stmt, CStyleCastExpr>
945     cStyleCastExpr;
946 const internal::VariadicDynCastAllOfMatcher<Stmt, ExplicitCastExpr>
947     explicitCastExpr;
948 const internal::VariadicDynCastAllOfMatcher<Stmt, ImplicitCastExpr>
949     implicitCastExpr;
950 const internal::VariadicDynCastAllOfMatcher<Stmt, CastExpr> castExpr;
951 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXFunctionalCastExpr>
952     cxxFunctionalCastExpr;
953 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXTemporaryObjectExpr>
954     cxxTemporaryObjectExpr;
955 const internal::VariadicDynCastAllOfMatcher<Stmt, PredefinedExpr>
956     predefinedExpr;
957 const internal::VariadicDynCastAllOfMatcher<Stmt, DesignatedInitExpr>
958     designatedInitExpr;
959 const internal::VariadicOperatorMatcherFunc<
960     2, std::numeric_limits<unsigned>::max()>
961     eachOf = {internal::DynTypedMatcher::VO_EachOf};
962 const internal::VariadicOperatorMatcherFunc<
963     2, std::numeric_limits<unsigned>::max()>
964     anyOf = {internal::DynTypedMatcher::VO_AnyOf};
965 const internal::VariadicOperatorMatcherFunc<
966     2, std::numeric_limits<unsigned>::max()>
967     allOf = {internal::DynTypedMatcher::VO_AllOf};
968 const internal::VariadicOperatorMatcherFunc<1, 1> optionally = {
969     internal::DynTypedMatcher::VO_Optionally};
970 const internal::VariadicFunction<internal::Matcher<NamedDecl>, StringRef,
971                                  internal::hasAnyNameFunc>
972     hasAnyName = {};
973 
974 const internal::VariadicFunction<internal::HasOpNameMatcher, StringRef,
975                                  internal::hasAnyOperatorNameFunc>
976     hasAnyOperatorName = {};
977 const internal::VariadicFunction<internal::HasOverloadOpNameMatcher, StringRef,
978                                  internal::hasAnyOverloadedOperatorNameFunc>
979     hasAnyOverloadedOperatorName = {};
980 const internal::VariadicFunction<internal::Matcher<ObjCMessageExpr>, StringRef,
981                                  internal::hasAnySelectorFunc>
982     hasAnySelector = {};
983 const internal::ArgumentAdaptingMatcherFunc<internal::HasMatcher> has = {};
984 const internal::ArgumentAdaptingMatcherFunc<internal::HasDescendantMatcher>
985     hasDescendant = {};
986 const internal::ArgumentAdaptingMatcherFunc<internal::ForEachMatcher> forEach =
987     {};
988 const internal::ArgumentAdaptingMatcherFunc<internal::ForEachDescendantMatcher>
989     forEachDescendant = {};
990 const internal::ArgumentAdaptingMatcherFunc<
991     internal::HasParentMatcher,
992     internal::TypeList<Decl, NestedNameSpecifierLoc, Stmt, TypeLoc>,
993     internal::TypeList<Decl, NestedNameSpecifierLoc, Stmt, TypeLoc>>
994     hasParent = {};
995 const internal::ArgumentAdaptingMatcherFunc<
996     internal::HasAncestorMatcher,
997     internal::TypeList<Decl, NestedNameSpecifierLoc, Stmt, TypeLoc>,
998     internal::TypeList<Decl, NestedNameSpecifierLoc, Stmt, TypeLoc>>
999     hasAncestor = {};
1000 const internal::VariadicOperatorMatcherFunc<1, 1> unless = {
1001     internal::DynTypedMatcher::VO_UnaryNot};
1002 const internal::VariadicAllOfMatcher<NestedNameSpecifier> nestedNameSpecifier;
1003 const internal::VariadicAllOfMatcher<NestedNameSpecifierLoc>
1004     nestedNameSpecifierLoc;
1005 const internal::VariadicDynCastAllOfMatcher<Stmt, CUDAKernelCallExpr>
1006     cudaKernelCallExpr;
1007 const AstTypeMatcher<BuiltinType> builtinType;
1008 const AstTypeMatcher<ArrayType> arrayType;
1009 const AstTypeMatcher<ComplexType> complexType;
1010 const AstTypeMatcher<ConstantArrayType> constantArrayType;
1011 const AstTypeMatcher<DeducedTemplateSpecializationType>
1012     deducedTemplateSpecializationType;
1013 const AstTypeMatcher<DependentSizedArrayType> dependentSizedArrayType;
1014 const AstTypeMatcher<IncompleteArrayType> incompleteArrayType;
1015 const AstTypeMatcher<VariableArrayType> variableArrayType;
1016 const AstTypeMatcher<AtomicType> atomicType;
1017 const AstTypeMatcher<AutoType> autoType;
1018 const AstTypeMatcher<DecltypeType> decltypeType;
1019 const AstTypeMatcher<FunctionType> functionType;
1020 const AstTypeMatcher<FunctionProtoType> functionProtoType;
1021 const AstTypeMatcher<ParenType> parenType;
1022 const AstTypeMatcher<BlockPointerType> blockPointerType;
1023 const AstTypeMatcher<MemberPointerType> memberPointerType;
1024 const AstTypeMatcher<PointerType> pointerType;
1025 const AstTypeMatcher<ObjCObjectPointerType> objcObjectPointerType;
1026 const AstTypeMatcher<ReferenceType> referenceType;
1027 const AstTypeMatcher<LValueReferenceType> lValueReferenceType;
1028 const AstTypeMatcher<RValueReferenceType> rValueReferenceType;
1029 const AstTypeMatcher<TypedefType> typedefType;
1030 const AstTypeMatcher<EnumType> enumType;
1031 const AstTypeMatcher<TemplateSpecializationType> templateSpecializationType;
1032 const AstTypeMatcher<UnaryTransformType> unaryTransformType;
1033 const AstTypeMatcher<RecordType> recordType;
1034 const AstTypeMatcher<TagType> tagType;
1035 const AstTypeMatcher<ElaboratedType> elaboratedType;
1036 const AstTypeMatcher<SubstTemplateTypeParmType> substTemplateTypeParmType;
1037 const AstTypeMatcher<TemplateTypeParmType> templateTypeParmType;
1038 const AstTypeMatcher<InjectedClassNameType> injectedClassNameType;
1039 const AstTypeMatcher<DecayedType> decayedType;
1040 AST_TYPELOC_TRAVERSE_MATCHER_DEF(hasElementType,
1041                                  AST_POLYMORPHIC_SUPPORTED_TYPES(ArrayType,
1042                                                                  ComplexType));
1043 AST_TYPELOC_TRAVERSE_MATCHER_DEF(hasValueType,
1044                                  AST_POLYMORPHIC_SUPPORTED_TYPES(AtomicType));
1045 AST_TYPELOC_TRAVERSE_MATCHER_DEF(
1046     pointee,
1047     AST_POLYMORPHIC_SUPPORTED_TYPES(BlockPointerType, MemberPointerType,
1048                                     PointerType, ReferenceType));
1049 
1050 const internal::VariadicDynCastAllOfMatcher<Stmt, OMPExecutableDirective>
1051     ompExecutableDirective;
1052 const internal::VariadicDynCastAllOfMatcher<OMPClause, OMPDefaultClause>
1053     ompDefaultClause;
1054 const internal::VariadicDynCastAllOfMatcher<Decl, CXXDeductionGuideDecl>
1055     cxxDeductionGuideDecl;
1056 
1057 } // end namespace ast_matchers
1058 } // end namespace clang
1059