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/STLExtras.h" 19 #include "llvm/ADT/StringMap.h" 20 #include "llvm/ADT/StringRef.h" 21 #include "llvm/Support/ManagedStatic.h" 22 #include <set> 23 #include <utility> 24 25 using namespace clang::ast_type_traits; 26 27 namespace clang { 28 namespace ast_matchers { 29 namespace dynamic { 30 namespace { 31 32 using internal::MatcherDescriptor; 33 34 typedef llvm::StringMap<const MatcherDescriptor *> ConstructorMap; 35 class RegistryMaps { 36 public: 37 RegistryMaps(); 38 ~RegistryMaps(); 39 40 const ConstructorMap &constructors() const { return Constructors; } 41 42 private: 43 void registerMatcher(StringRef MatcherName, MatcherDescriptor *Callback); 44 ConstructorMap Constructors; 45 }; 46 47 void RegistryMaps::registerMatcher(StringRef MatcherName, 48 MatcherDescriptor *Callback) { 49 assert(Constructors.find(MatcherName) == Constructors.end()); 50 Constructors[MatcherName] = Callback; 51 } 52 53 #define REGISTER_MATCHER(name) \ 54 registerMatcher(#name, internal::makeMatcherAutoMarshall( \ 55 ::clang::ast_matchers::name, #name)); 56 57 #define SPECIFIC_MATCHER_OVERLOAD(name, Id) \ 58 static_cast< ::clang::ast_matchers::name##_Type##Id>( \ 59 ::clang::ast_matchers::name) 60 61 #define REGISTER_OVERLOADED_2(name) \ 62 do { \ 63 MatcherDescriptor *Callbacks[] = { \ 64 internal::makeMatcherAutoMarshall(SPECIFIC_MATCHER_OVERLOAD(name, 0), \ 65 #name), \ 66 internal::makeMatcherAutoMarshall(SPECIFIC_MATCHER_OVERLOAD(name, 1), \ 67 #name) \ 68 }; \ 69 registerMatcher(#name, \ 70 new internal::OverloadedMatcherDescriptor(Callbacks)); \ 71 } while (0) 72 73 /// \brief Generate a registry map with all the known matchers. 74 RegistryMaps::RegistryMaps() { 75 // TODO: Here is the list of the missing matchers, grouped by reason. 76 // 77 // Need Variant/Parser fixes: 78 // ofKind 79 // 80 // Polymorphic + argument overload: 81 // findAll 82 // 83 // Other: 84 // equals 85 // equalsNode 86 87 REGISTER_OVERLOADED_2(callee); 88 REGISTER_OVERLOADED_2(hasPrefix); 89 REGISTER_OVERLOADED_2(hasType); 90 REGISTER_OVERLOADED_2(isDerivedFrom); 91 REGISTER_OVERLOADED_2(isSameOrDerivedFrom); 92 REGISTER_OVERLOADED_2(loc); 93 REGISTER_OVERLOADED_2(pointsTo); 94 REGISTER_OVERLOADED_2(references); 95 REGISTER_OVERLOADED_2(thisPointerType); 96 97 REGISTER_MATCHER(accessSpecDecl); 98 REGISTER_MATCHER(alignOfExpr); 99 REGISTER_MATCHER(allOf); 100 REGISTER_MATCHER(anyOf); 101 REGISTER_MATCHER(anything); 102 REGISTER_MATCHER(argumentCountIs); 103 REGISTER_MATCHER(arraySubscriptExpr); 104 REGISTER_MATCHER(arrayType); 105 REGISTER_MATCHER(asmStmt); 106 REGISTER_MATCHER(asString); 107 REGISTER_MATCHER(atomicType); 108 REGISTER_MATCHER(autoType); 109 REGISTER_MATCHER(binaryOperator); 110 REGISTER_MATCHER(bindTemporaryExpr); 111 REGISTER_MATCHER(blockPointerType); 112 REGISTER_MATCHER(boolLiteral); 113 REGISTER_MATCHER(breakStmt); 114 REGISTER_MATCHER(builtinType); 115 REGISTER_MATCHER(callExpr); 116 REGISTER_MATCHER(caseStmt); 117 REGISTER_MATCHER(castExpr); 118 REGISTER_MATCHER(catchStmt); 119 REGISTER_MATCHER(characterLiteral); 120 REGISTER_MATCHER(classTemplateDecl); 121 REGISTER_MATCHER(classTemplateSpecializationDecl); 122 REGISTER_MATCHER(complexType); 123 REGISTER_MATCHER(compoundLiteralExpr); 124 REGISTER_MATCHER(compoundStmt); 125 REGISTER_MATCHER(conditionalOperator); 126 REGISTER_MATCHER(constantArrayType); 127 REGISTER_MATCHER(constCastExpr); 128 REGISTER_MATCHER(constructExpr); 129 REGISTER_MATCHER(constructorDecl); 130 REGISTER_MATCHER(containsDeclaration); 131 REGISTER_MATCHER(continueStmt); 132 REGISTER_MATCHER(conversionDecl); 133 REGISTER_MATCHER(cStyleCastExpr); 134 REGISTER_MATCHER(ctorInitializer); 135 REGISTER_MATCHER(CUDAKernelCallExpr); 136 REGISTER_MATCHER(decl); 137 REGISTER_MATCHER(declaratorDecl); 138 REGISTER_MATCHER(declCountIs); 139 REGISTER_MATCHER(declRefExpr); 140 REGISTER_MATCHER(declStmt); 141 REGISTER_MATCHER(defaultArgExpr); 142 REGISTER_MATCHER(defaultStmt); 143 REGISTER_MATCHER(deleteExpr); 144 REGISTER_MATCHER(dependentSizedArrayType); 145 REGISTER_MATCHER(destructorDecl); 146 REGISTER_MATCHER(doStmt); 147 REGISTER_MATCHER(dynamicCastExpr); 148 REGISTER_MATCHER(eachOf); 149 REGISTER_MATCHER(elaboratedType); 150 REGISTER_MATCHER(enumConstantDecl); 151 REGISTER_MATCHER(enumDecl); 152 REGISTER_MATCHER(equalsBoundNode); 153 REGISTER_MATCHER(equalsIntegralValue); 154 REGISTER_MATCHER(explicitCastExpr); 155 REGISTER_MATCHER(expr); 156 REGISTER_MATCHER(exprWithCleanups); 157 REGISTER_MATCHER(fieldDecl); 158 REGISTER_MATCHER(floatLiteral); 159 REGISTER_MATCHER(forEach); 160 REGISTER_MATCHER(forEachConstructorInitializer); 161 REGISTER_MATCHER(forEachDescendant); 162 REGISTER_MATCHER(forEachSwitchCase); 163 REGISTER_MATCHER(forField); 164 REGISTER_MATCHER(forRangeStmt); 165 REGISTER_MATCHER(forStmt); 166 REGISTER_MATCHER(friendDecl); 167 REGISTER_MATCHER(functionalCastExpr); 168 REGISTER_MATCHER(functionDecl); 169 REGISTER_MATCHER(functionTemplateDecl); 170 REGISTER_MATCHER(functionType); 171 REGISTER_MATCHER(gotoStmt); 172 REGISTER_MATCHER(has); 173 REGISTER_MATCHER(hasAncestor); 174 REGISTER_MATCHER(hasAnyArgument); 175 REGISTER_MATCHER(hasAnyConstructorInitializer); 176 REGISTER_MATCHER(hasAnyParameter); 177 REGISTER_MATCHER(hasAnySubstatement); 178 REGISTER_MATCHER(hasAnyTemplateArgument); 179 REGISTER_MATCHER(hasAnyUsingShadowDecl); 180 REGISTER_MATCHER(hasArgument); 181 REGISTER_MATCHER(hasArgumentOfType); 182 REGISTER_MATCHER(hasAttr); 183 REGISTER_MATCHER(hasBase); 184 REGISTER_MATCHER(hasBody); 185 REGISTER_MATCHER(hasCanonicalType); 186 REGISTER_MATCHER(hasCaseConstant); 187 REGISTER_MATCHER(hasCondition); 188 REGISTER_MATCHER(hasConditionVariableStatement); 189 REGISTER_MATCHER(hasDeclaration); 190 REGISTER_MATCHER(hasDeclContext); 191 REGISTER_MATCHER(hasDeducedType); 192 REGISTER_MATCHER(hasDescendant); 193 REGISTER_MATCHER(hasDestinationType); 194 REGISTER_MATCHER(hasEitherOperand); 195 REGISTER_MATCHER(hasElementType); 196 REGISTER_MATCHER(hasElse); 197 REGISTER_MATCHER(hasFalseExpression); 198 REGISTER_MATCHER(hasGlobalStorage); 199 REGISTER_MATCHER(hasImplicitDestinationType); 200 REGISTER_MATCHER(hasIncrement); 201 REGISTER_MATCHER(hasIndex); 202 REGISTER_MATCHER(hasInitializer); 203 REGISTER_MATCHER(hasKeywordSelector); 204 REGISTER_MATCHER(hasLHS); 205 REGISTER_MATCHER(hasLocalQualifiers); 206 REGISTER_MATCHER(hasLocalStorage); 207 REGISTER_MATCHER(hasLoopInit); 208 REGISTER_MATCHER(hasLoopVariable); 209 REGISTER_MATCHER(hasMethod); 210 REGISTER_MATCHER(hasName); 211 REGISTER_MATCHER(hasNullSelector); 212 REGISTER_MATCHER(hasObjectExpression); 213 REGISTER_MATCHER(hasOperatorName); 214 REGISTER_MATCHER(hasOverloadedOperatorName); 215 REGISTER_MATCHER(hasParameter); 216 REGISTER_MATCHER(hasParent); 217 REGISTER_MATCHER(hasQualifier); 218 REGISTER_MATCHER(hasRangeInit); 219 REGISTER_MATCHER(hasReceiverType); 220 REGISTER_MATCHER(hasRHS); 221 REGISTER_MATCHER(hasSelector); 222 REGISTER_MATCHER(hasSingleDecl); 223 REGISTER_MATCHER(hasSize); 224 REGISTER_MATCHER(hasSizeExpr); 225 REGISTER_MATCHER(hasSourceExpression); 226 REGISTER_MATCHER(hasTargetDecl); 227 REGISTER_MATCHER(hasTemplateArgument); 228 REGISTER_MATCHER(hasThen); 229 REGISTER_MATCHER(hasTrueExpression); 230 REGISTER_MATCHER(hasTypeLoc); 231 REGISTER_MATCHER(hasUnaryOperand); 232 REGISTER_MATCHER(hasUnarySelector); 233 REGISTER_MATCHER(hasValueType); 234 REGISTER_MATCHER(ifStmt); 235 REGISTER_MATCHER(ignoringImpCasts); 236 REGISTER_MATCHER(ignoringParenCasts); 237 REGISTER_MATCHER(ignoringParenImpCasts); 238 REGISTER_MATCHER(implicitCastExpr); 239 REGISTER_MATCHER(incompleteArrayType); 240 REGISTER_MATCHER(initListExpr); 241 REGISTER_MATCHER(innerType); 242 REGISTER_MATCHER(integerLiteral); 243 REGISTER_MATCHER(isAnonymous); 244 REGISTER_MATCHER(isArrow); 245 REGISTER_MATCHER(isBaseInitializer); 246 REGISTER_MATCHER(isCatchAll); 247 REGISTER_MATCHER(isConst); 248 REGISTER_MATCHER(isConstQualified); 249 REGISTER_MATCHER(isCopyConstructor); 250 REGISTER_MATCHER(isDefaultConstructor); 251 REGISTER_MATCHER(isDefinition); 252 REGISTER_MATCHER(isDeleted); 253 REGISTER_MATCHER(isExceptionVariable); 254 REGISTER_MATCHER(isExplicit); 255 REGISTER_MATCHER(isExplicitTemplateSpecialization); 256 REGISTER_MATCHER(isExpr); 257 REGISTER_MATCHER(isExternC); 258 REGISTER_MATCHER(isFinal); 259 REGISTER_MATCHER(isInline); 260 REGISTER_MATCHER(isImplicit); 261 REGISTER_MATCHER(isExpansionInFileMatching); 262 REGISTER_MATCHER(isExpansionInMainFile); 263 REGISTER_MATCHER(isInstantiated); 264 REGISTER_MATCHER(isExpansionInSystemHeader); 265 REGISTER_MATCHER(isInteger); 266 REGISTER_MATCHER(isIntegral); 267 REGISTER_MATCHER(isInTemplateInstantiation); 268 REGISTER_MATCHER(isListInitialization); 269 REGISTER_MATCHER(isMemberInitializer); 270 REGISTER_MATCHER(isMoveConstructor); 271 REGISTER_MATCHER(isOverride); 272 REGISTER_MATCHER(isPrivate); 273 REGISTER_MATCHER(isProtected); 274 REGISTER_MATCHER(isPublic); 275 REGISTER_MATCHER(isPure); 276 REGISTER_MATCHER(isTemplateInstantiation); 277 REGISTER_MATCHER(isVirtual); 278 REGISTER_MATCHER(isWritten); 279 REGISTER_MATCHER(labelStmt); 280 REGISTER_MATCHER(lambdaExpr); 281 REGISTER_MATCHER(lValueReferenceType); 282 REGISTER_MATCHER(matchesName); 283 REGISTER_MATCHER(matchesSelector); 284 REGISTER_MATCHER(materializeTemporaryExpr); 285 REGISTER_MATCHER(member); 286 REGISTER_MATCHER(memberCallExpr); 287 REGISTER_MATCHER(memberExpr); 288 REGISTER_MATCHER(memberPointerType); 289 REGISTER_MATCHER(methodDecl); 290 REGISTER_MATCHER(namedDecl); 291 REGISTER_MATCHER(namespaceAliasDecl); 292 REGISTER_MATCHER(namespaceDecl); 293 REGISTER_MATCHER(namesType); 294 REGISTER_MATCHER(nestedNameSpecifier); 295 REGISTER_MATCHER(nestedNameSpecifierLoc); 296 REGISTER_MATCHER(newExpr); 297 REGISTER_MATCHER(nullPtrLiteralExpr); 298 REGISTER_MATCHER(nullStmt); 299 REGISTER_MATCHER(numSelectorArgs); 300 REGISTER_MATCHER(ofClass); 301 REGISTER_MATCHER(objcMessageExpr); 302 REGISTER_MATCHER(on); 303 REGISTER_MATCHER(onImplicitObjectArgument); 304 REGISTER_MATCHER(operatorCallExpr); 305 REGISTER_MATCHER(parameterCountIs); 306 REGISTER_MATCHER(parenType); 307 REGISTER_MATCHER(parmVarDecl); 308 REGISTER_MATCHER(pointee); 309 REGISTER_MATCHER(pointerType); 310 REGISTER_MATCHER(qualType); 311 REGISTER_MATCHER(recordDecl); 312 REGISTER_MATCHER(recordType); 313 REGISTER_MATCHER(referenceType); 314 REGISTER_MATCHER(refersToDeclaration); 315 REGISTER_MATCHER(refersToIntegralType); 316 REGISTER_MATCHER(refersToType); 317 REGISTER_MATCHER(reinterpretCastExpr); 318 REGISTER_MATCHER(returns); 319 REGISTER_MATCHER(returnStmt); 320 REGISTER_MATCHER(rValueReferenceType); 321 REGISTER_MATCHER(sizeOfExpr); 322 REGISTER_MATCHER(specifiesNamespace); 323 REGISTER_MATCHER(specifiesType); 324 REGISTER_MATCHER(specifiesTypeLoc); 325 REGISTER_MATCHER(statementCountIs); 326 REGISTER_MATCHER(staticCastExpr); 327 REGISTER_MATCHER(staticAssertDecl); 328 REGISTER_MATCHER(stmt); 329 REGISTER_MATCHER(stringLiteral); 330 REGISTER_MATCHER(substNonTypeTemplateParmExpr); 331 REGISTER_MATCHER(substTemplateTypeParmType); 332 REGISTER_MATCHER(switchCase); 333 REGISTER_MATCHER(switchStmt); 334 REGISTER_MATCHER(templateArgument); 335 REGISTER_MATCHER(templateArgumentCountIs); 336 REGISTER_MATCHER(templateSpecializationType); 337 REGISTER_MATCHER(temporaryObjectExpr); 338 REGISTER_MATCHER(thisExpr); 339 REGISTER_MATCHER(throughUsingDecl); 340 REGISTER_MATCHER(throwExpr); 341 REGISTER_MATCHER(to); 342 REGISTER_MATCHER(translationUnitDecl); 343 REGISTER_MATCHER(tryStmt); 344 REGISTER_MATCHER(type); 345 REGISTER_MATCHER(typedefDecl); 346 REGISTER_MATCHER(typedefType); 347 REGISTER_MATCHER(typeLoc); 348 REGISTER_MATCHER(unaryExprOrTypeTraitExpr); 349 REGISTER_MATCHER(unaryOperator); 350 REGISTER_MATCHER(unaryTransformType); 351 REGISTER_MATCHER(unless); 352 REGISTER_MATCHER(unresolvedConstructExpr); 353 REGISTER_MATCHER(unresolvedUsingValueDecl); 354 REGISTER_MATCHER(userDefinedLiteral); 355 REGISTER_MATCHER(usingDecl); 356 REGISTER_MATCHER(usingDirectiveDecl); 357 REGISTER_MATCHER(valueDecl); 358 REGISTER_MATCHER(varDecl); 359 REGISTER_MATCHER(variableArrayType); 360 REGISTER_MATCHER(voidType); 361 REGISTER_MATCHER(whileStmt); 362 REGISTER_MATCHER(withInitializer); 363 } 364 365 RegistryMaps::~RegistryMaps() { 366 llvm::DeleteContainerSeconds(Constructors); 367 } 368 369 static llvm::ManagedStatic<RegistryMaps> RegistryData; 370 371 } // anonymous namespace 372 373 // static 374 llvm::Optional<MatcherCtor> Registry::lookupMatcherCtor(StringRef MatcherName) { 375 ConstructorMap::const_iterator it = 376 RegistryData->constructors().find(MatcherName); 377 return it == RegistryData->constructors().end() 378 ? llvm::Optional<MatcherCtor>() 379 : it->second; 380 } 381 382 namespace { 383 384 llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, 385 const std::set<ASTNodeKind> &KS) { 386 unsigned Count = 0; 387 for (std::set<ASTNodeKind>::const_iterator I = KS.begin(), E = KS.end(); 388 I != E; ++I) { 389 if (I != KS.begin()) 390 OS << "|"; 391 if (Count++ == 3) { 392 OS << "..."; 393 break; 394 } 395 OS << *I; 396 } 397 return OS; 398 } 399 400 } // namespace 401 402 std::vector<ArgKind> Registry::getAcceptedCompletionTypes( 403 ArrayRef<std::pair<MatcherCtor, unsigned>> Context) { 404 ASTNodeKind InitialTypes[] = { 405 ASTNodeKind::getFromNodeKind<Decl>(), 406 ASTNodeKind::getFromNodeKind<QualType>(), 407 ASTNodeKind::getFromNodeKind<Type>(), 408 ASTNodeKind::getFromNodeKind<Stmt>(), 409 ASTNodeKind::getFromNodeKind<NestedNameSpecifier>(), 410 ASTNodeKind::getFromNodeKind<NestedNameSpecifierLoc>(), 411 ASTNodeKind::getFromNodeKind<TypeLoc>()}; 412 413 // Starting with the above seed of acceptable top-level matcher types, compute 414 // the acceptable type set for the argument indicated by each context element. 415 std::set<ArgKind> TypeSet(std::begin(InitialTypes), std::end(InitialTypes)); 416 for (const auto &CtxEntry : Context) { 417 MatcherCtor Ctor = CtxEntry.first; 418 unsigned ArgNumber = CtxEntry.second; 419 std::vector<ArgKind> NextTypeSet; 420 for (const ArgKind &Kind : TypeSet) { 421 if (Kind.getArgKind() == Kind.AK_Matcher && 422 Ctor->isConvertibleTo(Kind.getMatcherKind()) && 423 (Ctor->isVariadic() || ArgNumber < Ctor->getNumArgs())) 424 Ctor->getArgKinds(Kind.getMatcherKind(), ArgNumber, NextTypeSet); 425 } 426 TypeSet.clear(); 427 TypeSet.insert(NextTypeSet.begin(), NextTypeSet.end()); 428 } 429 return std::vector<ArgKind>(TypeSet.begin(), TypeSet.end()); 430 } 431 432 std::vector<MatcherCompletion> 433 Registry::getMatcherCompletions(ArrayRef<ArgKind> AcceptedTypes) { 434 std::vector<MatcherCompletion> Completions; 435 436 // Search the registry for acceptable matchers. 437 for (const auto &M : RegistryData->constructors()) { 438 const auto *Matcher = M.getValue(); 439 StringRef Name = M.getKey(); 440 441 std::set<ASTNodeKind> RetKinds; 442 unsigned NumArgs = Matcher->isVariadic() ? 1 : Matcher->getNumArgs(); 443 bool IsPolymorphic = Matcher->isPolymorphic(); 444 std::vector<std::vector<ArgKind>> ArgsKinds(NumArgs); 445 unsigned MaxSpecificity = 0; 446 for (const ArgKind& Kind : AcceptedTypes) { 447 if (Kind.getArgKind() != Kind.AK_Matcher) 448 continue; 449 unsigned Specificity; 450 ASTNodeKind LeastDerivedKind; 451 if (Matcher->isConvertibleTo(Kind.getMatcherKind(), &Specificity, 452 &LeastDerivedKind)) { 453 if (MaxSpecificity < Specificity) 454 MaxSpecificity = Specificity; 455 RetKinds.insert(LeastDerivedKind); 456 for (unsigned Arg = 0; Arg != NumArgs; ++Arg) 457 Matcher->getArgKinds(Kind.getMatcherKind(), Arg, ArgsKinds[Arg]); 458 if (IsPolymorphic) 459 break; 460 } 461 } 462 463 if (!RetKinds.empty() && MaxSpecificity > 0) { 464 std::string Decl; 465 llvm::raw_string_ostream OS(Decl); 466 467 if (IsPolymorphic) { 468 OS << "Matcher<T> " << Name << "(Matcher<T>"; 469 } else { 470 OS << "Matcher<" << RetKinds << "> " << Name << "("; 471 for (const std::vector<ArgKind> &Arg : ArgsKinds) { 472 if (&Arg != &ArgsKinds[0]) 473 OS << ", "; 474 475 bool FirstArgKind = true; 476 std::set<ASTNodeKind> MatcherKinds; 477 // Two steps. First all non-matchers, then matchers only. 478 for (const ArgKind &AK : Arg) { 479 if (AK.getArgKind() == ArgKind::AK_Matcher) { 480 MatcherKinds.insert(AK.getMatcherKind()); 481 } else { 482 if (!FirstArgKind) OS << "|"; 483 FirstArgKind = false; 484 OS << AK.asString(); 485 } 486 } 487 if (!MatcherKinds.empty()) { 488 if (!FirstArgKind) OS << "|"; 489 OS << "Matcher<" << MatcherKinds << ">"; 490 } 491 } 492 } 493 if (Matcher->isVariadic()) 494 OS << "..."; 495 OS << ")"; 496 497 std::string TypedText = Name; 498 TypedText += "("; 499 if (ArgsKinds.empty()) 500 TypedText += ")"; 501 else if (ArgsKinds[0][0].getArgKind() == ArgKind::AK_String) 502 TypedText += "\""; 503 504 Completions.emplace_back(TypedText, OS.str(), MaxSpecificity); 505 } 506 } 507 508 return Completions; 509 } 510 511 // static 512 VariantMatcher Registry::constructMatcher(MatcherCtor Ctor, 513 const SourceRange &NameRange, 514 ArrayRef<ParserValue> Args, 515 Diagnostics *Error) { 516 return Ctor->create(NameRange, Args, Error); 517 } 518 519 // static 520 VariantMatcher Registry::constructBoundMatcher(MatcherCtor Ctor, 521 const SourceRange &NameRange, 522 StringRef BindID, 523 ArrayRef<ParserValue> Args, 524 Diagnostics *Error) { 525 VariantMatcher Out = constructMatcher(Ctor, NameRange, Args, Error); 526 if (Out.isNull()) return Out; 527 528 llvm::Optional<DynTypedMatcher> Result = Out.getSingleMatcher(); 529 if (Result.hasValue()) { 530 llvm::Optional<DynTypedMatcher> Bound = Result->tryBind(BindID); 531 if (Bound.hasValue()) { 532 return VariantMatcher::SingleMatcher(*Bound); 533 } 534 } 535 Error->addError(NameRange, Error->ET_RegistryNotBindable); 536 return VariantMatcher(); 537 } 538 539 } // namespace dynamic 540 } // namespace ast_matchers 541 } // namespace clang 542