1 //===--- Registry.cpp - Matcher registry -------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===------------------------------------------------------------===//
9 ///
10 /// \file
11 /// \brief Registry map populated at static initialization time.
12 ///
13 //===------------------------------------------------------------===//
14 
15 #include "clang/ASTMatchers/Dynamic/Registry.h"
16 #include "Marshallers.h"
17 #include "clang/ASTMatchers/ASTMatchers.h"
18 #include "llvm/ADT/StringMap.h"
19 #include "llvm/ADT/StringRef.h"
20 #include "llvm/Support/ManagedStatic.h"
21 #include <set>
22 #include <utility>
23 
24 using namespace clang::ast_type_traits;
25 
26 namespace clang {
27 namespace ast_matchers {
28 namespace dynamic {
29 namespace {
30 
31 using internal::MatcherDescriptor;
32 
33 typedef llvm::StringMap<const MatcherDescriptor *> ConstructorMap;
34 class RegistryMaps {
35 public:
36   RegistryMaps();
37   ~RegistryMaps();
38 
constructors() const39   const ConstructorMap &constructors() const { return Constructors; }
40 
41 private:
42   void registerMatcher(StringRef MatcherName, MatcherDescriptor *Callback);
43   ConstructorMap Constructors;
44 };
45 
registerMatcher(StringRef MatcherName,MatcherDescriptor * Callback)46 void RegistryMaps::registerMatcher(StringRef MatcherName,
47                                    MatcherDescriptor *Callback) {
48   assert(Constructors.find(MatcherName) == Constructors.end());
49   Constructors[MatcherName] = Callback;
50 }
51 
52 #define REGISTER_MATCHER(name)                                                 \
53   registerMatcher(#name, internal::makeMatcherAutoMarshall(                    \
54                              ::clang::ast_matchers::name, #name));
55 
56 #define SPECIFIC_MATCHER_OVERLOAD(name, Id)                                    \
57   static_cast< ::clang::ast_matchers::name##_Type##Id>(                        \
58       ::clang::ast_matchers::name)
59 
60 #define REGISTER_OVERLOADED_2(name)                                            \
61   do {                                                                         \
62     MatcherDescriptor *Callbacks[] = {                                         \
63       internal::makeMatcherAutoMarshall(SPECIFIC_MATCHER_OVERLOAD(name, 0),    \
64                                         #name),                                \
65       internal::makeMatcherAutoMarshall(SPECIFIC_MATCHER_OVERLOAD(name, 1),    \
66                                         #name)                                 \
67     };                                                                         \
68     registerMatcher(#name,                                                     \
69                     new internal::OverloadedMatcherDescriptor(Callbacks));     \
70   } while (0)
71 
72 /// \brief Generate a registry map with all the known matchers.
RegistryMaps()73 RegistryMaps::RegistryMaps() {
74   // TODO: Here is the list of the missing matchers, grouped by reason.
75   //
76   // Need Variant/Parser fixes:
77   // ofKind
78   //
79   // Polymorphic + argument overload:
80   // findAll
81   //
82   // Other:
83   // equals
84   // equalsNode
85 
86   REGISTER_OVERLOADED_2(callee);
87   REGISTER_OVERLOADED_2(hasPrefix);
88   REGISTER_OVERLOADED_2(hasType);
89   REGISTER_OVERLOADED_2(isDerivedFrom);
90   REGISTER_OVERLOADED_2(isSameOrDerivedFrom);
91   REGISTER_OVERLOADED_2(loc);
92   REGISTER_OVERLOADED_2(pointsTo);
93   REGISTER_OVERLOADED_2(references);
94   REGISTER_OVERLOADED_2(thisPointerType);
95 
96   REGISTER_MATCHER(accessSpecDecl);
97   REGISTER_MATCHER(alignOfExpr);
98   REGISTER_MATCHER(allOf);
99   REGISTER_MATCHER(anyOf);
100   REGISTER_MATCHER(anything);
101   REGISTER_MATCHER(argumentCountIs);
102   REGISTER_MATCHER(arraySubscriptExpr);
103   REGISTER_MATCHER(arrayType);
104   REGISTER_MATCHER(asmStmt);
105   REGISTER_MATCHER(asString);
106   REGISTER_MATCHER(atomicType);
107   REGISTER_MATCHER(autoType);
108   REGISTER_MATCHER(binaryOperator);
109   REGISTER_MATCHER(bindTemporaryExpr);
110   REGISTER_MATCHER(blockPointerType);
111   REGISTER_MATCHER(boolLiteral);
112   REGISTER_MATCHER(breakStmt);
113   REGISTER_MATCHER(builtinType);
114   REGISTER_MATCHER(callExpr);
115   REGISTER_MATCHER(caseStmt);
116   REGISTER_MATCHER(castExpr);
117   REGISTER_MATCHER(catchStmt);
118   REGISTER_MATCHER(characterLiteral);
119   REGISTER_MATCHER(classTemplateDecl);
120   REGISTER_MATCHER(classTemplateSpecializationDecl);
121   REGISTER_MATCHER(complexType);
122   REGISTER_MATCHER(compoundLiteralExpr);
123   REGISTER_MATCHER(compoundStmt);
124   REGISTER_MATCHER(conditionalOperator);
125   REGISTER_MATCHER(constantArrayType);
126   REGISTER_MATCHER(constCastExpr);
127   REGISTER_MATCHER(constructExpr);
128   REGISTER_MATCHER(constructorDecl);
129   REGISTER_MATCHER(containsDeclaration);
130   REGISTER_MATCHER(continueStmt);
131   REGISTER_MATCHER(cStyleCastExpr);
132   REGISTER_MATCHER(ctorInitializer);
133   REGISTER_MATCHER(CUDAKernelCallExpr);
134   REGISTER_MATCHER(decl);
135   REGISTER_MATCHER(declaratorDecl);
136   REGISTER_MATCHER(declCountIs);
137   REGISTER_MATCHER(declRefExpr);
138   REGISTER_MATCHER(declStmt);
139   REGISTER_MATCHER(defaultArgExpr);
140   REGISTER_MATCHER(defaultStmt);
141   REGISTER_MATCHER(deleteExpr);
142   REGISTER_MATCHER(dependentSizedArrayType);
143   REGISTER_MATCHER(destructorDecl);
144   REGISTER_MATCHER(doStmt);
145   REGISTER_MATCHER(dynamicCastExpr);
146   REGISTER_MATCHER(eachOf);
147   REGISTER_MATCHER(elaboratedType);
148   REGISTER_MATCHER(enumConstantDecl);
149   REGISTER_MATCHER(enumDecl);
150   REGISTER_MATCHER(equalsBoundNode);
151   REGISTER_MATCHER(equalsIntegralValue);
152   REGISTER_MATCHER(explicitCastExpr);
153   REGISTER_MATCHER(expr);
154   REGISTER_MATCHER(exprWithCleanups);
155   REGISTER_MATCHER(fieldDecl);
156   REGISTER_MATCHER(floatLiteral);
157   REGISTER_MATCHER(forEach);
158   REGISTER_MATCHER(forEachConstructorInitializer);
159   REGISTER_MATCHER(forEachDescendant);
160   REGISTER_MATCHER(forEachSwitchCase);
161   REGISTER_MATCHER(forField);
162   REGISTER_MATCHER(forRangeStmt);
163   REGISTER_MATCHER(forStmt);
164   REGISTER_MATCHER(friendDecl);
165   REGISTER_MATCHER(functionalCastExpr);
166   REGISTER_MATCHER(functionDecl);
167   REGISTER_MATCHER(functionTemplateDecl);
168   REGISTER_MATCHER(functionType);
169   REGISTER_MATCHER(gotoStmt);
170   REGISTER_MATCHER(has);
171   REGISTER_MATCHER(hasAncestor);
172   REGISTER_MATCHER(hasAnyArgument);
173   REGISTER_MATCHER(hasAnyConstructorInitializer);
174   REGISTER_MATCHER(hasAnyParameter);
175   REGISTER_MATCHER(hasAnySubstatement);
176   REGISTER_MATCHER(hasAnyTemplateArgument);
177   REGISTER_MATCHER(hasAnyUsingShadowDecl);
178   REGISTER_MATCHER(hasArgument);
179   REGISTER_MATCHER(hasArgumentOfType);
180   REGISTER_MATCHER(hasAttr);
181   REGISTER_MATCHER(hasBase);
182   REGISTER_MATCHER(hasBody);
183   REGISTER_MATCHER(hasCanonicalType);
184   REGISTER_MATCHER(hasCaseConstant);
185   REGISTER_MATCHER(hasCondition);
186   REGISTER_MATCHER(hasConditionVariableStatement);
187   REGISTER_MATCHER(hasDeclaration);
188   REGISTER_MATCHER(hasDeclContext);
189   REGISTER_MATCHER(hasDeducedType);
190   REGISTER_MATCHER(hasDescendant);
191   REGISTER_MATCHER(hasDestinationType);
192   REGISTER_MATCHER(hasEitherOperand);
193   REGISTER_MATCHER(hasElementType);
194   REGISTER_MATCHER(hasElse);
195   REGISTER_MATCHER(hasFalseExpression);
196   REGISTER_MATCHER(hasGlobalStorage);
197   REGISTER_MATCHER(hasImplicitDestinationType);
198   REGISTER_MATCHER(hasIncrement);
199   REGISTER_MATCHER(hasIndex);
200   REGISTER_MATCHER(hasInitializer);
201   REGISTER_MATCHER(hasLHS);
202   REGISTER_MATCHER(hasLocalQualifiers);
203   REGISTER_MATCHER(hasLocalStorage);
204   REGISTER_MATCHER(hasLoopInit);
205   REGISTER_MATCHER(hasLoopVariable);
206   REGISTER_MATCHER(hasMethod);
207   REGISTER_MATCHER(hasName);
208   REGISTER_MATCHER(hasObjectExpression);
209   REGISTER_MATCHER(hasOperatorName);
210   REGISTER_MATCHER(hasOverloadedOperatorName);
211   REGISTER_MATCHER(hasParameter);
212   REGISTER_MATCHER(hasParent);
213   REGISTER_MATCHER(hasQualifier);
214   REGISTER_MATCHER(hasRangeInit);
215   REGISTER_MATCHER(hasRHS);
216   REGISTER_MATCHER(hasSingleDecl);
217   REGISTER_MATCHER(hasSize);
218   REGISTER_MATCHER(hasSizeExpr);
219   REGISTER_MATCHER(hasSourceExpression);
220   REGISTER_MATCHER(hasTargetDecl);
221   REGISTER_MATCHER(hasTemplateArgument);
222   REGISTER_MATCHER(hasThen);
223   REGISTER_MATCHER(hasTrueExpression);
224   REGISTER_MATCHER(hasTypeLoc);
225   REGISTER_MATCHER(hasUnaryOperand);
226   REGISTER_MATCHER(hasValueType);
227   REGISTER_MATCHER(ifStmt);
228   REGISTER_MATCHER(ignoringImpCasts);
229   REGISTER_MATCHER(ignoringParenCasts);
230   REGISTER_MATCHER(ignoringParenImpCasts);
231   REGISTER_MATCHER(implicitCastExpr);
232   REGISTER_MATCHER(incompleteArrayType);
233   REGISTER_MATCHER(initListExpr);
234   REGISTER_MATCHER(innerType);
235   REGISTER_MATCHER(integerLiteral);
236   REGISTER_MATCHER(isArrow);
237   REGISTER_MATCHER(isConst);
238   REGISTER_MATCHER(isConstQualified);
239   REGISTER_MATCHER(isDefinition);
240   REGISTER_MATCHER(isDeleted);
241   REGISTER_MATCHER(isExplicitTemplateSpecialization);
242   REGISTER_MATCHER(isExpr);
243   REGISTER_MATCHER(isExternC);
244   REGISTER_MATCHER(isImplicit);
245   REGISTER_MATCHER(isExpansionInFileMatching);
246   REGISTER_MATCHER(isExpansionInMainFile);
247   REGISTER_MATCHER(isInstantiated);
248   REGISTER_MATCHER(isExpansionInSystemHeader);
249   REGISTER_MATCHER(isInteger);
250   REGISTER_MATCHER(isIntegral);
251   REGISTER_MATCHER(isInTemplateInstantiation);
252   REGISTER_MATCHER(isListInitialization);
253   REGISTER_MATCHER(isOverride);
254   REGISTER_MATCHER(isPrivate);
255   REGISTER_MATCHER(isProtected);
256   REGISTER_MATCHER(isPublic);
257   REGISTER_MATCHER(isPure);
258   REGISTER_MATCHER(isTemplateInstantiation);
259   REGISTER_MATCHER(isVirtual);
260   REGISTER_MATCHER(isWritten);
261   REGISTER_MATCHER(labelStmt);
262   REGISTER_MATCHER(lambdaExpr);
263   REGISTER_MATCHER(lValueReferenceType);
264   REGISTER_MATCHER(matchesName);
265   REGISTER_MATCHER(materializeTemporaryExpr);
266   REGISTER_MATCHER(member);
267   REGISTER_MATCHER(memberCallExpr);
268   REGISTER_MATCHER(memberExpr);
269   REGISTER_MATCHER(memberPointerType);
270   REGISTER_MATCHER(methodDecl);
271   REGISTER_MATCHER(namedDecl);
272   REGISTER_MATCHER(namespaceDecl);
273   REGISTER_MATCHER(namesType);
274   REGISTER_MATCHER(nestedNameSpecifier);
275   REGISTER_MATCHER(nestedNameSpecifierLoc);
276   REGISTER_MATCHER(newExpr);
277   REGISTER_MATCHER(nullPtrLiteralExpr);
278   REGISTER_MATCHER(nullStmt);
279   REGISTER_MATCHER(ofClass);
280   REGISTER_MATCHER(on);
281   REGISTER_MATCHER(onImplicitObjectArgument);
282   REGISTER_MATCHER(operatorCallExpr);
283   REGISTER_MATCHER(parameterCountIs);
284   REGISTER_MATCHER(parenType);
285   REGISTER_MATCHER(parmVarDecl);
286   REGISTER_MATCHER(pointee);
287   REGISTER_MATCHER(pointerType);
288   REGISTER_MATCHER(qualType);
289   REGISTER_MATCHER(recordDecl);
290   REGISTER_MATCHER(recordType);
291   REGISTER_MATCHER(referenceType);
292   REGISTER_MATCHER(refersToDeclaration);
293   REGISTER_MATCHER(refersToIntegralType);
294   REGISTER_MATCHER(refersToType);
295   REGISTER_MATCHER(reinterpretCastExpr);
296   REGISTER_MATCHER(returns);
297   REGISTER_MATCHER(returnStmt);
298   REGISTER_MATCHER(rValueReferenceType);
299   REGISTER_MATCHER(sizeOfExpr);
300   REGISTER_MATCHER(specifiesNamespace);
301   REGISTER_MATCHER(specifiesType);
302   REGISTER_MATCHER(specifiesTypeLoc);
303   REGISTER_MATCHER(statementCountIs);
304   REGISTER_MATCHER(staticCastExpr);
305   REGISTER_MATCHER(stmt);
306   REGISTER_MATCHER(stringLiteral);
307   REGISTER_MATCHER(substNonTypeTemplateParmExpr);
308   REGISTER_MATCHER(switchCase);
309   REGISTER_MATCHER(switchStmt);
310   REGISTER_MATCHER(templateArgument);
311   REGISTER_MATCHER(templateArgumentCountIs);
312   REGISTER_MATCHER(templateSpecializationType);
313   REGISTER_MATCHER(temporaryObjectExpr);
314   REGISTER_MATCHER(thisExpr);
315   REGISTER_MATCHER(throughUsingDecl);
316   REGISTER_MATCHER(throwExpr);
317   REGISTER_MATCHER(to);
318   REGISTER_MATCHER(tryStmt);
319   REGISTER_MATCHER(type);
320   REGISTER_MATCHER(typedefDecl);
321   REGISTER_MATCHER(typedefType);
322   REGISTER_MATCHER(typeLoc);
323   REGISTER_MATCHER(unaryExprOrTypeTraitExpr);
324   REGISTER_MATCHER(unaryOperator);
325   REGISTER_MATCHER(unaryTransformType);
326   REGISTER_MATCHER(unless);
327   REGISTER_MATCHER(unresolvedConstructExpr);
328   REGISTER_MATCHER(unresolvedUsingValueDecl);
329   REGISTER_MATCHER(userDefinedLiteral);
330   REGISTER_MATCHER(usingDecl);
331   REGISTER_MATCHER(usingDirectiveDecl);
332   REGISTER_MATCHER(valueDecl);
333   REGISTER_MATCHER(varDecl);
334   REGISTER_MATCHER(variableArrayType);
335   REGISTER_MATCHER(voidType);
336   REGISTER_MATCHER(whileStmt);
337   REGISTER_MATCHER(withInitializer);
338 }
339 
~RegistryMaps()340 RegistryMaps::~RegistryMaps() {
341   for (ConstructorMap::iterator it = Constructors.begin(),
342                                 end = Constructors.end();
343        it != end; ++it) {
344     delete it->second;
345   }
346 }
347 
348 static llvm::ManagedStatic<RegistryMaps> RegistryData;
349 
350 } // anonymous namespace
351 
352 // static
lookupMatcherCtor(StringRef MatcherName)353 llvm::Optional<MatcherCtor> Registry::lookupMatcherCtor(StringRef MatcherName) {
354   ConstructorMap::const_iterator it =
355       RegistryData->constructors().find(MatcherName);
356   return it == RegistryData->constructors().end()
357              ? llvm::Optional<MatcherCtor>()
358              : it->second;
359 }
360 
361 namespace {
362 
operator <<(llvm::raw_ostream & OS,const std::set<ASTNodeKind> & KS)363 llvm::raw_ostream &operator<<(llvm::raw_ostream &OS,
364                               const std::set<ASTNodeKind> &KS) {
365   unsigned Count = 0;
366   for (std::set<ASTNodeKind>::const_iterator I = KS.begin(), E = KS.end();
367        I != E; ++I) {
368     if (I != KS.begin())
369       OS << "|";
370     if (Count++ == 3) {
371       OS << "...";
372       break;
373     }
374     OS << *I;
375   }
376   return OS;
377 }
378 
379 }  // namespace
380 
getAcceptedCompletionTypes(ArrayRef<std::pair<MatcherCtor,unsigned>> Context)381 std::vector<ArgKind> Registry::getAcceptedCompletionTypes(
382     ArrayRef<std::pair<MatcherCtor, unsigned>> Context) {
383   ASTNodeKind InitialTypes[] = {
384       ASTNodeKind::getFromNodeKind<Decl>(),
385       ASTNodeKind::getFromNodeKind<QualType>(),
386       ASTNodeKind::getFromNodeKind<Type>(),
387       ASTNodeKind::getFromNodeKind<Stmt>(),
388       ASTNodeKind::getFromNodeKind<NestedNameSpecifier>(),
389       ASTNodeKind::getFromNodeKind<NestedNameSpecifierLoc>(),
390       ASTNodeKind::getFromNodeKind<TypeLoc>()};
391 
392   // Starting with the above seed of acceptable top-level matcher types, compute
393   // the acceptable type set for the argument indicated by each context element.
394   std::set<ArgKind> TypeSet(std::begin(InitialTypes), std::end(InitialTypes));
395   for (const auto &CtxEntry : Context) {
396     MatcherCtor Ctor = CtxEntry.first;
397     unsigned ArgNumber = CtxEntry.second;
398     std::vector<ArgKind> NextTypeSet;
399     for (const ArgKind &Kind : TypeSet) {
400       if (Kind.getArgKind() == Kind.AK_Matcher &&
401           Ctor->isConvertibleTo(Kind.getMatcherKind()) &&
402           (Ctor->isVariadic() || ArgNumber < Ctor->getNumArgs()))
403         Ctor->getArgKinds(Kind.getMatcherKind(), ArgNumber, NextTypeSet);
404     }
405     TypeSet.clear();
406     TypeSet.insert(NextTypeSet.begin(), NextTypeSet.end());
407   }
408   return std::vector<ArgKind>(TypeSet.begin(), TypeSet.end());
409 }
410 
411 std::vector<MatcherCompletion>
getMatcherCompletions(ArrayRef<ArgKind> AcceptedTypes)412 Registry::getMatcherCompletions(ArrayRef<ArgKind> AcceptedTypes) {
413   std::vector<MatcherCompletion> Completions;
414 
415   // Search the registry for acceptable matchers.
416   for (ConstructorMap::const_iterator I = RegistryData->constructors().begin(),
417                                       E = RegistryData->constructors().end();
418        I != E; ++I) {
419     std::set<ASTNodeKind> RetKinds;
420     unsigned NumArgs = I->second->isVariadic() ? 1 : I->second->getNumArgs();
421     bool IsPolymorphic = I->second->isPolymorphic();
422     std::vector<std::vector<ArgKind>> ArgsKinds(NumArgs);
423     unsigned MaxSpecificity = 0;
424     for (const ArgKind& Kind : AcceptedTypes) {
425       if (Kind.getArgKind() != Kind.AK_Matcher)
426         continue;
427       unsigned Specificity;
428       ASTNodeKind LeastDerivedKind;
429       if (I->second->isConvertibleTo(Kind.getMatcherKind(), &Specificity,
430                                      &LeastDerivedKind)) {
431         if (MaxSpecificity < Specificity)
432           MaxSpecificity = Specificity;
433         RetKinds.insert(LeastDerivedKind);
434         for (unsigned Arg = 0; Arg != NumArgs; ++Arg)
435           I->second->getArgKinds(Kind.getMatcherKind(), Arg, ArgsKinds[Arg]);
436         if (IsPolymorphic)
437           break;
438       }
439     }
440 
441     if (!RetKinds.empty() && MaxSpecificity > 0) {
442       std::string Decl;
443       llvm::raw_string_ostream OS(Decl);
444 
445       if (IsPolymorphic) {
446         OS << "Matcher<T> " << I->first() << "(Matcher<T>";
447       } else {
448         OS << "Matcher<" << RetKinds << "> " << I->first() << "(";
449         for (const std::vector<ArgKind> &Arg : ArgsKinds) {
450           if (&Arg != &ArgsKinds[0])
451             OS << ", ";
452 
453           bool FirstArgKind = true;
454           std::set<ASTNodeKind> MatcherKinds;
455           // Two steps. First all non-matchers, then matchers only.
456           for (const ArgKind &AK : Arg) {
457             if (AK.getArgKind() == ArgKind::AK_Matcher) {
458               MatcherKinds.insert(AK.getMatcherKind());
459             } else {
460               if (!FirstArgKind) OS << "|";
461               FirstArgKind = false;
462               OS << AK.asString();
463             }
464           }
465           if (!MatcherKinds.empty()) {
466             if (!FirstArgKind) OS << "|";
467             OS << "Matcher<" << MatcherKinds << ">";
468           }
469         }
470       }
471       if (I->second->isVariadic())
472         OS << "...";
473       OS << ")";
474 
475       std::string TypedText = I->first();
476       TypedText += "(";
477       if (ArgsKinds.empty())
478         TypedText += ")";
479       else if (ArgsKinds[0][0].getArgKind() == ArgKind::AK_String)
480         TypedText += "\"";
481 
482       Completions.emplace_back(TypedText, OS.str(), MaxSpecificity);
483     }
484   }
485 
486   return Completions;
487 }
488 
489 // static
constructMatcher(MatcherCtor Ctor,const SourceRange & NameRange,ArrayRef<ParserValue> Args,Diagnostics * Error)490 VariantMatcher Registry::constructMatcher(MatcherCtor Ctor,
491                                           const SourceRange &NameRange,
492                                           ArrayRef<ParserValue> Args,
493                                           Diagnostics *Error) {
494   return Ctor->create(NameRange, Args, Error);
495 }
496 
497 // static
constructBoundMatcher(MatcherCtor Ctor,const SourceRange & NameRange,StringRef BindID,ArrayRef<ParserValue> Args,Diagnostics * Error)498 VariantMatcher Registry::constructBoundMatcher(MatcherCtor Ctor,
499                                                const SourceRange &NameRange,
500                                                StringRef BindID,
501                                                ArrayRef<ParserValue> Args,
502                                                Diagnostics *Error) {
503   VariantMatcher Out = constructMatcher(Ctor, NameRange, Args, Error);
504   if (Out.isNull()) return Out;
505 
506   llvm::Optional<DynTypedMatcher> Result = Out.getSingleMatcher();
507   if (Result.hasValue()) {
508     llvm::Optional<DynTypedMatcher> Bound = Result->tryBind(BindID);
509     if (Bound.hasValue()) {
510       return VariantMatcher::SingleMatcher(*Bound);
511     }
512   }
513   Error->addError(NameRange, Error->ET_RegistryNotBindable);
514   return VariantMatcher();
515 }
516 
517 }  // namespace dynamic
518 }  // namespace ast_matchers
519 }  // namespace clang
520