lib/ASTMatchers/Dynamic/Registry.cpp

   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<std::unique_ptr<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,
  44                        std::unique_ptr<MatcherDescriptor> Callback);
  45
  46   ConstructorMap Constructors;
  47 };
  48
  49 void RegistryMaps::registerMatcher(
  50     StringRef MatcherName, std::unique_ptr<MatcherDescriptor> Callback) {
  51   assert(Constructors.find(MatcherName) == Constructors.end());
  52   Constructors[MatcherName] = std::move(Callback);
  53 }
  54
  55 #define REGISTER_MATCHER(name)                                                 \
  56   registerMatcher(#name, internal::makeMatcherAutoMarshall(                    \
  57                              ::clang::ast_matchers::name, #name));
  58
  59 #define SPECIFIC_MATCHER_OVERLOAD(name, Id)                                    \
  60   static_cast<::clang::ast_matchers::name##_Type##Id>(                         \
  61       ::clang::ast_matchers::name)
  62
  63 #define REGISTER_OVERLOADED_2(name)                                            \
  64   do {                                                                         \
  65     std::unique_ptr<MatcherDescriptor> Callbacks[] = {                         \
  66         internal::makeMatcherAutoMarshall(SPECIFIC_MATCHER_OVERLOAD(name, 0),  \
  67                                           #name),                              \
  68         internal::makeMatcherAutoMarshall(SPECIFIC_MATCHER_OVERLOAD(name, 1),  \
  69                                           #name)};                             \
  70     registerMatcher(                                                           \
  71         #name,                                                                 \
  72         llvm::make_unique<internal::OverloadedMatcherDescriptor>(Callbacks));  \
  73   } while (0)
  74
  75 /// \brief Generate a registry map with all the known matchers.
  76 RegistryMaps::RegistryMaps() {
  77   // TODO: Here is the list of the missing matchers, grouped by reason.
  78   //
  79   // Need Variant/Parser fixes:
  80   // ofKind
  81   //
  82   // Polymorphic + argument overload:
  83   // findAll
  84   //
  85   // Other:
  86   // equals
  87   // equalsNode
  88
  89   REGISTER_OVERLOADED_2(callee);
  90   REGISTER_OVERLOADED_2(hasPrefix);
  91   REGISTER_OVERLOADED_2(hasType);
  92   REGISTER_OVERLOADED_2(isDerivedFrom);
  93   REGISTER_OVERLOADED_2(isSameOrDerivedFrom);
  94   REGISTER_OVERLOADED_2(loc);
  95   REGISTER_OVERLOADED_2(pointsTo);
  96   REGISTER_OVERLOADED_2(references);
  97   REGISTER_OVERLOADED_2(thisPointerType);
  98
  99   REGISTER_MATCHER(accessSpecDecl);
 100   REGISTER_MATCHER(addrLabelExpr);
 101   REGISTER_MATCHER(alignOfExpr);
 102   REGISTER_MATCHER(allOf);
 103   REGISTER_MATCHER(anyOf);
 104   REGISTER_MATCHER(anything);
 105   REGISTER_MATCHER(argumentCountIs);
 106   REGISTER_MATCHER(arraySubscriptExpr);
 107   REGISTER_MATCHER(arrayType);
 108   REGISTER_MATCHER(asmStmt);
 109   REGISTER_MATCHER(asString);
 110   REGISTER_MATCHER(atomicExpr);
 111   REGISTER_MATCHER(atomicType);
 112   REGISTER_MATCHER(autoType);
 113   REGISTER_MATCHER(binaryOperator);
 114   REGISTER_MATCHER(binaryConditionalOperator);
 115   REGISTER_MATCHER(blockPointerType);
 116   REGISTER_MATCHER(booleanType);
 117   REGISTER_MATCHER(breakStmt);
 118   REGISTER_MATCHER(builtinType);
 119   REGISTER_MATCHER(callExpr);
 120   REGISTER_MATCHER(caseStmt);
 121   REGISTER_MATCHER(castExpr);
 122   REGISTER_MATCHER(characterLiteral);
 123   REGISTER_MATCHER(classTemplateDecl);
 124   REGISTER_MATCHER(classTemplateSpecializationDecl);
 125   REGISTER_MATCHER(complexType);
 126   REGISTER_MATCHER(compoundLiteralExpr);
 127   REGISTER_MATCHER(compoundStmt);
 128   REGISTER_MATCHER(conditionalOperator);
 129   REGISTER_MATCHER(constantArrayType);
 130   REGISTER_MATCHER(containsDeclaration);
 131   REGISTER_MATCHER(continueStmt);
 132   REGISTER_MATCHER(cStyleCastExpr);
 133   REGISTER_MATCHER(cudaKernelCallExpr);
 134   REGISTER_MATCHER(cxxBindTemporaryExpr);
 135   REGISTER_MATCHER(cxxBoolLiteral);
 136   REGISTER_MATCHER(cxxCatchStmt);
 137   REGISTER_MATCHER(cxxConstCastExpr);
 138   REGISTER_MATCHER(cxxConstructExpr);
 139   REGISTER_MATCHER(cxxConstructorDecl);
 140   REGISTER_MATCHER(cxxConversionDecl);
 141   REGISTER_MATCHER(cxxCtorInitializer);
 142   REGISTER_MATCHER(cxxDefaultArgExpr);
 143   REGISTER_MATCHER(cxxDeleteExpr);
 144   REGISTER_MATCHER(cxxDestructorDecl);
 145   REGISTER_MATCHER(cxxDynamicCastExpr);
 146   REGISTER_MATCHER(cxxForRangeStmt);
 147   REGISTER_MATCHER(cxxFunctionalCastExpr);
 148   REGISTER_MATCHER(cxxMemberCallExpr);
 149   REGISTER_MATCHER(cxxMethodDecl);
 150   REGISTER_MATCHER(cxxNewExpr);
 151   REGISTER_MATCHER(cxxNullPtrLiteralExpr);
 152   REGISTER_MATCHER(cxxOperatorCallExpr);
 153   REGISTER_MATCHER(cxxRecordDecl);
 154   REGISTER_MATCHER(cxxReinterpretCastExpr);
 155   REGISTER_MATCHER(cxxStaticCastExpr);
 156   REGISTER_MATCHER(cxxTemporaryObjectExpr);
 157   REGISTER_MATCHER(cxxThisExpr);
 158   REGISTER_MATCHER(cxxThrowExpr);
 159   REGISTER_MATCHER(cxxTryStmt);
 160   REGISTER_MATCHER(cxxUnresolvedConstructExpr);
 161   REGISTER_MATCHER(decayedType);
 162   REGISTER_MATCHER(decl);
 163   REGISTER_MATCHER(declaratorDecl);
 164   REGISTER_MATCHER(declCountIs);
 165   REGISTER_MATCHER(declRefExpr);
 166   REGISTER_MATCHER(declStmt);
 167   REGISTER_MATCHER(defaultStmt);
 168   REGISTER_MATCHER(dependentSizedArrayType);
 169   REGISTER_MATCHER(designatedInitExpr);
 170   REGISTER_MATCHER(designatorCountIs);
 171   REGISTER_MATCHER(doStmt);
 172   REGISTER_MATCHER(eachOf);
 173   REGISTER_MATCHER(elaboratedType);
 174   REGISTER_MATCHER(enumConstantDecl);
 175   REGISTER_MATCHER(enumDecl);
 176   REGISTER_MATCHER(enumType);
 177   REGISTER_MATCHER(equalsBoundNode);
 178   REGISTER_MATCHER(equalsIntegralValue);
 179   REGISTER_MATCHER(explicitCastExpr);
 180   REGISTER_MATCHER(expr);
 181   REGISTER_MATCHER(exprWithCleanups);
 182   REGISTER_MATCHER(fieldDecl);
 183   REGISTER_MATCHER(floatLiteral);
 184   REGISTER_MATCHER(forEach);
 185   REGISTER_MATCHER(forEachArgumentWithParam);
 186   REGISTER_MATCHER(forEachConstructorInitializer);
 187   REGISTER_MATCHER(forEachDescendant);
 188   REGISTER_MATCHER(forEachSwitchCase);
 189   REGISTER_MATCHER(forField);
 190   REGISTER_MATCHER(forFunction);
 191   REGISTER_MATCHER(forStmt);
 192   REGISTER_MATCHER(friendDecl);
 193   REGISTER_MATCHER(functionDecl);
 194   REGISTER_MATCHER(functionProtoType);
 195   REGISTER_MATCHER(functionTemplateDecl);
 196   REGISTER_MATCHER(functionType);
 197   REGISTER_MATCHER(gnuNullExpr);
 198   REGISTER_MATCHER(gotoStmt);
 199   REGISTER_MATCHER(has);
 200   REGISTER_MATCHER(hasAncestor);
 201   REGISTER_MATCHER(hasAnyArgument);
 202   REGISTER_MATCHER(hasAnyConstructorInitializer);
 203   REGISTER_MATCHER(hasAnyDeclaration);
 204   REGISTER_MATCHER(hasAnyName);
 205   REGISTER_MATCHER(hasAnyParameter);
 206   REGISTER_MATCHER(hasAnySubstatement);
 207   REGISTER_MATCHER(hasAnyTemplateArgument);
 208   REGISTER_MATCHER(hasAnyUsingShadowDecl);
 209   REGISTER_MATCHER(hasArgument);
 210   REGISTER_MATCHER(hasArgumentOfType);
 211   REGISTER_MATCHER(hasAttr);
 212   REGISTER_MATCHER(hasAutomaticStorageDuration);
 213   REGISTER_MATCHER(hasBase);
 214   REGISTER_MATCHER(hasBitWidth);
 215   REGISTER_MATCHER(hasBody);
 216   REGISTER_MATCHER(hasCanonicalType);
 217   REGISTER_MATCHER(hasCaseConstant);
 218   REGISTER_MATCHER(hasCastKind);
 219   REGISTER_MATCHER(hasCondition);
 220   REGISTER_MATCHER(hasConditionVariableStatement);
 221   REGISTER_MATCHER(hasDecayedType);
 222   REGISTER_MATCHER(hasDeclaration);
 223   REGISTER_MATCHER(hasDeclContext);
 224   REGISTER_MATCHER(hasDeducedType);
 225   REGISTER_MATCHER(hasDescendant);
 226   REGISTER_MATCHER(hasDestinationType);
 227   REGISTER_MATCHER(hasDynamicExceptionSpec);
 228   REGISTER_MATCHER(hasEitherOperand);
 229   REGISTER_MATCHER(hasElementType);
 230   REGISTER_MATCHER(hasElse);
 231   REGISTER_MATCHER(hasExternalFormalLinkage);
 232   REGISTER_MATCHER(hasFalseExpression);
 233   REGISTER_MATCHER(hasGlobalStorage);
 234   REGISTER_MATCHER(hasImplicitDestinationType);
 235   REGISTER_MATCHER(hasInClassInitializer);
 236   REGISTER_MATCHER(hasIncrement);
 237   REGISTER_MATCHER(hasIndex);
 238   REGISTER_MATCHER(hasInitializer);
 239   REGISTER_MATCHER(hasKeywordSelector);
 240   REGISTER_MATCHER(hasLHS);
 241   REGISTER_MATCHER(hasLocalQualifiers);
 242   REGISTER_MATCHER(hasLocalStorage);
 243   REGISTER_MATCHER(hasLoopInit);
 244   REGISTER_MATCHER(hasLoopVariable);
 245   REGISTER_MATCHER(hasMethod);
 246   REGISTER_MATCHER(hasName);
 247   REGISTER_MATCHER(hasNullSelector);
 248   REGISTER_MATCHER(hasObjectExpression);
 249   REGISTER_MATCHER(hasOperatorName);
 250   REGISTER_MATCHER(hasOverloadedOperatorName);
 251   REGISTER_MATCHER(hasParameter);
 252   REGISTER_MATCHER(hasParent);
 253   REGISTER_MATCHER(hasQualifier);
 254   REGISTER_MATCHER(hasRangeInit);
 255   REGISTER_MATCHER(hasReceiverType);
 256   REGISTER_MATCHER(hasReplacementType);
 257   REGISTER_MATCHER(hasReturnValue);
 258   REGISTER_MATCHER(hasRHS);
 259   REGISTER_MATCHER(hasSelector);
 260   REGISTER_MATCHER(hasSingleDecl);
 261   REGISTER_MATCHER(hasSize);
 262   REGISTER_MATCHER(hasSizeExpr);
 263   REGISTER_MATCHER(hasSourceExpression);
 264   REGISTER_MATCHER(hasStaticStorageDuration);
 265   REGISTER_MATCHER(hasSyntacticForm);
 266   REGISTER_MATCHER(hasTargetDecl);
 267   REGISTER_MATCHER(hasTemplateArgument);
 268   REGISTER_MATCHER(hasThen);
 269   REGISTER_MATCHER(hasThreadStorageDuration);
 270   REGISTER_MATCHER(hasTrueExpression);
 271   REGISTER_MATCHER(hasTypeLoc);
 272   REGISTER_MATCHER(hasUnaryOperand);
 273   REGISTER_MATCHER(hasUnarySelector);
 274   REGISTER_MATCHER(hasUnderlyingDecl);
 275   REGISTER_MATCHER(hasUnqualifiedDesugaredType);
 276   REGISTER_MATCHER(hasValueType);
 277   REGISTER_MATCHER(ifStmt);
 278   REGISTER_MATCHER(ignoringImplicit);
 279   REGISTER_MATCHER(ignoringImpCasts);
 280   REGISTER_MATCHER(ignoringParenCasts);
 281   REGISTER_MATCHER(ignoringParenImpCasts);
 282   REGISTER_MATCHER(ignoringParens);
 283   REGISTER_MATCHER(implicitCastExpr);
 284   REGISTER_MATCHER(implicitValueInitExpr);
 285   REGISTER_MATCHER(incompleteArrayType);
 286   REGISTER_MATCHER(initListExpr);
 287   REGISTER_MATCHER(injectedClassNameType);
 288   REGISTER_MATCHER(innerType);
 289   REGISTER_MATCHER(integerLiteral);
 290   REGISTER_MATCHER(isAnonymous);
 291   REGISTER_MATCHER(isAnyCharacter);
 292   REGISTER_MATCHER(isAnyPointer);
 293   REGISTER_MATCHER(isArrow);
 294   REGISTER_MATCHER(isBaseInitializer);
 295   REGISTER_MATCHER(isBitField);
 296   REGISTER_MATCHER(isCatchAll);
 297   REGISTER_MATCHER(isClass);
 298   REGISTER_MATCHER(isConst);
 299   REGISTER_MATCHER(isConstQualified);
 300   REGISTER_MATCHER(isCopyAssignmentOperator);
 301   REGISTER_MATCHER(isCopyConstructor);
 302   REGISTER_MATCHER(isDefaultConstructor);
 303   REGISTER_MATCHER(isDefaulted);
 304   REGISTER_MATCHER(isDefinition);
 305   REGISTER_MATCHER(isDeleted);
 306   REGISTER_MATCHER(isExceptionVariable);
 307   REGISTER_MATCHER(isExplicit);
 308   REGISTER_MATCHER(isExplicitTemplateSpecialization);
 309   REGISTER_MATCHER(isExpr);
 310   REGISTER_MATCHER(isExternC);
 311   REGISTER_MATCHER(isFinal);
 312   REGISTER_MATCHER(isInline);
 313   REGISTER_MATCHER(isImplicit);
 314   REGISTER_MATCHER(isExpansionInFileMatching);
 315   REGISTER_MATCHER(isExpansionInMainFile);
 316   REGISTER_MATCHER(isInstantiated);
 317   REGISTER_MATCHER(isExpansionInSystemHeader);
 318   REGISTER_MATCHER(isInteger);
 319   REGISTER_MATCHER(isIntegral);
 320   REGISTER_MATCHER(isInTemplateInstantiation);
 321   REGISTER_MATCHER(isLambda);
 322   REGISTER_MATCHER(isListInitialization);
 323   REGISTER_MATCHER(isMemberInitializer);
 324   REGISTER_MATCHER(isMoveAssignmentOperator);
 325   REGISTER_MATCHER(isMoveConstructor);
 326   REGISTER_MATCHER(isNoThrow);
 327   REGISTER_MATCHER(isOverride);
 328   REGISTER_MATCHER(isPrivate);
 329   REGISTER_MATCHER(isProtected);
 330   REGISTER_MATCHER(isPublic);
 331   REGISTER_MATCHER(isPure);
 332   REGISTER_MATCHER(isSignedInteger);
 333   REGISTER_MATCHER(isStaticStorageClass);
 334   REGISTER_MATCHER(isStruct);
 335   REGISTER_MATCHER(isTemplateInstantiation);
 336   REGISTER_MATCHER(isUnion);
 337   REGISTER_MATCHER(isUnsignedInteger);
 338   REGISTER_MATCHER(isVariadic);
 339   REGISTER_MATCHER(isVirtual);
 340   REGISTER_MATCHER(isVirtualAsWritten);
 341   REGISTER_MATCHER(isVolatileQualified);
 342   REGISTER_MATCHER(isWritten);
 343   REGISTER_MATCHER(labelDecl);
 344   REGISTER_MATCHER(labelStmt);
 345   REGISTER_MATCHER(lambdaExpr);
 346   REGISTER_MATCHER(lValueReferenceType);
 347   REGISTER_MATCHER(matchesName);
 348   REGISTER_MATCHER(matchesSelector);
 349   REGISTER_MATCHER(materializeTemporaryExpr);
 350   REGISTER_MATCHER(member);
 351   REGISTER_MATCHER(memberExpr);
 352   REGISTER_MATCHER(memberPointerType);
 353   REGISTER_MATCHER(namedDecl);
 354   REGISTER_MATCHER(namespaceAliasDecl);
 355   REGISTER_MATCHER(namespaceDecl);
 356   REGISTER_MATCHER(namesType);
 357   REGISTER_MATCHER(nestedNameSpecifier);
 358   REGISTER_MATCHER(nestedNameSpecifierLoc);
 359   REGISTER_MATCHER(nullPointerConstant);
 360   REGISTER_MATCHER(nullStmt);
 361   REGISTER_MATCHER(numSelectorArgs);
 362   REGISTER_MATCHER(ofClass);
 363   REGISTER_MATCHER(objcCategoryDecl);
 364   REGISTER_MATCHER(objcInterfaceDecl);
 365   REGISTER_MATCHER(objcIvarDecl);
 366   REGISTER_MATCHER(objcMessageExpr);
 367   REGISTER_MATCHER(objcMethodDecl);
 368   REGISTER_MATCHER(objcObjectPointerType);
 369   REGISTER_MATCHER(objcPropertyDecl);
 370   REGISTER_MATCHER(objcProtocolDecl);
 371   REGISTER_MATCHER(on);
 372   REGISTER_MATCHER(onImplicitObjectArgument);
 373   REGISTER_MATCHER(opaqueValueExpr);
 374   REGISTER_MATCHER(parameterCountIs);
 375   REGISTER_MATCHER(parenExpr);
 376   REGISTER_MATCHER(parenListExpr);
 377   REGISTER_MATCHER(parenType);
 378   REGISTER_MATCHER(parmVarDecl);
 379   REGISTER_MATCHER(pointee);
 380   REGISTER_MATCHER(pointerType);
 381   REGISTER_MATCHER(predefinedExpr);
 382   REGISTER_MATCHER(qualType);
 383   REGISTER_MATCHER(realFloatingPointType);
 384   REGISTER_MATCHER(recordDecl);
 385   REGISTER_MATCHER(recordType);
 386   REGISTER_MATCHER(referenceType);
 387   REGISTER_MATCHER(refersToDeclaration);
 388   REGISTER_MATCHER(refersToIntegralType);
 389   REGISTER_MATCHER(refersToType);
 390   REGISTER_MATCHER(requiresZeroInitialization);
 391   REGISTER_MATCHER(returns);
 392   REGISTER_MATCHER(returnStmt);
 393   REGISTER_MATCHER(rValueReferenceType);
 394   REGISTER_MATCHER(sizeOfExpr);
 395   REGISTER_MATCHER(specifiesNamespace);
 396   REGISTER_MATCHER(specifiesType);
 397   REGISTER_MATCHER(specifiesTypeLoc);
 398   REGISTER_MATCHER(statementCountIs);
 399   REGISTER_MATCHER(staticAssertDecl);
 400   REGISTER_MATCHER(stmt);
 401   REGISTER_MATCHER(stmtExpr);
 402   REGISTER_MATCHER(stringLiteral);
 403   REGISTER_MATCHER(substNonTypeTemplateParmExpr);
 404   REGISTER_MATCHER(substTemplateTypeParmType);
 405   REGISTER_MATCHER(switchCase);
 406   REGISTER_MATCHER(switchStmt);
 407   REGISTER_MATCHER(templateArgument);
 408   REGISTER_MATCHER(templateName);
 409   REGISTER_MATCHER(templateArgumentCountIs);
 410   REGISTER_MATCHER(templateSpecializationType);
 411   REGISTER_MATCHER(templateTypeParmDecl);
 412   REGISTER_MATCHER(templateTypeParmType);
 413   REGISTER_MATCHER(throughUsingDecl);
 414   REGISTER_MATCHER(to);
 415   REGISTER_MATCHER(translationUnitDecl);
 416   REGISTER_MATCHER(type);
 417   REGISTER_MATCHER(typedefDecl);
 418   REGISTER_MATCHER(typedefNameDecl);
 419   REGISTER_MATCHER(typedefType);
 420   REGISTER_MATCHER(typeAliasDecl);
 421   REGISTER_MATCHER(typeAliasTemplateDecl);
 422   REGISTER_MATCHER(typeLoc);
 423   REGISTER_MATCHER(unaryExprOrTypeTraitExpr);
 424   REGISTER_MATCHER(unaryOperator);
 425   REGISTER_MATCHER(unaryTransformType);
 426   REGISTER_MATCHER(unless);
 427   REGISTER_MATCHER(unresolvedLookupExpr);
 428   REGISTER_MATCHER(unresolvedUsingTypenameDecl);
 429   REGISTER_MATCHER(unresolvedUsingValueDecl);
 430   REGISTER_MATCHER(userDefinedLiteral);
 431   REGISTER_MATCHER(usingDecl);
 432   REGISTER_MATCHER(usingDirectiveDecl);
 433   REGISTER_MATCHER(valueDecl);
 434   REGISTER_MATCHER(varDecl);
 435   REGISTER_MATCHER(variableArrayType);
 436   REGISTER_MATCHER(voidType);
 437   REGISTER_MATCHER(whileStmt);
 438   REGISTER_MATCHER(withInitializer);
 439 }
 440
 441 RegistryMaps::~RegistryMaps() {}
 442
 443 static llvm::ManagedStatic<RegistryMaps> RegistryData;
 444
 445 } // anonymous namespace
 446
 447 // static
 448 llvm::Optional<MatcherCtor> Registry::lookupMatcherCtor(StringRef MatcherName) {
 449   auto it = RegistryData->constructors().find(MatcherName);
 450   return it == RegistryData->constructors().end()
 451              ? llvm::Optional<MatcherCtor>()
 452              : it->second.get();
 453 }
 454
 455 namespace {
 456
 457 llvm::raw_ostream &operator<<(llvm::raw_ostream &OS,
 458                               const std::set<ASTNodeKind> &KS) {
 459   unsigned Count = 0;
 460   for (std::set<ASTNodeKind>::const_iterator I = KS.begin(), E = KS.end();
 461        I != E; ++I) {
 462     if (I != KS.begin())
 463       OS << "|";
 464     if (Count++ == 3) {
 465       OS << "...";
 466       break;
 467     }
 468     OS << *I;
 469   }
 470   return OS;
 471 }
 472
 473 }  // namespace
 474
 475 std::vector<ArgKind> Registry::getAcceptedCompletionTypes(
 476     ArrayRef<std::pair<MatcherCtor, unsigned>> Context) {
 477   ASTNodeKind InitialTypes[] = {
 478       ASTNodeKind::getFromNodeKind<Decl>(),
 479       ASTNodeKind::getFromNodeKind<QualType>(),
 480       ASTNodeKind::getFromNodeKind<Type>(),
 481       ASTNodeKind::getFromNodeKind<Stmt>(),
 482       ASTNodeKind::getFromNodeKind<NestedNameSpecifier>(),
 483       ASTNodeKind::getFromNodeKind<NestedNameSpecifierLoc>(),
 484       ASTNodeKind::getFromNodeKind<TypeLoc>()};
 485
 486   // Starting with the above seed of acceptable top-level matcher types, compute
 487   // the acceptable type set for the argument indicated by each context element.
 488   std::set<ArgKind> TypeSet(std::begin(InitialTypes), std::end(InitialTypes));
 489   for (const auto &CtxEntry : Context) {
 490     MatcherCtor Ctor = CtxEntry.first;
 491     unsigned ArgNumber = CtxEntry.second;
 492     std::vector<ArgKind> NextTypeSet;
 493     for (const ArgKind &Kind : TypeSet) {
 494       if (Kind.getArgKind() == Kind.AK_Matcher &&
 495           Ctor->isConvertibleTo(Kind.getMatcherKind()) &&
 496           (Ctor->isVariadic() || ArgNumber < Ctor->getNumArgs()))
 497         Ctor->getArgKinds(Kind.getMatcherKind(), ArgNumber, NextTypeSet);
 498     }
 499     TypeSet.clear();
 500     TypeSet.insert(NextTypeSet.begin(), NextTypeSet.end());
 501   }
 502   return std::vector<ArgKind>(TypeSet.begin(), TypeSet.end());
 503 }
 504
 505 std::vector<MatcherCompletion>
 506 Registry::getMatcherCompletions(ArrayRef<ArgKind> AcceptedTypes) {
 507   std::vector<MatcherCompletion> Completions;
 508
 509   // Search the registry for acceptable matchers.
 510   for (const auto &M : RegistryData->constructors()) {
 511     const MatcherDescriptor& Matcher = *M.getValue();
 512     StringRef Name = M.getKey();
 513
 514     std::set<ASTNodeKind> RetKinds;
 515     unsigned NumArgs = Matcher.isVariadic() ? 1 : Matcher.getNumArgs();
 516     bool IsPolymorphic = Matcher.isPolymorphic();
 517     std::vector<std::vector<ArgKind>> ArgsKinds(NumArgs);
 518     unsigned MaxSpecificity = 0;
 519     for (const ArgKind& Kind : AcceptedTypes) {
 520       if (Kind.getArgKind() != Kind.AK_Matcher)
 521         continue;
 522       unsigned Specificity;
 523       ASTNodeKind LeastDerivedKind;
 524       if (Matcher.isConvertibleTo(Kind.getMatcherKind(), &Specificity,
 525                                   &LeastDerivedKind)) {
 526         if (MaxSpecificity < Specificity)
 527           MaxSpecificity = Specificity;
 528         RetKinds.insert(LeastDerivedKind);
 529         for (unsigned Arg = 0; Arg != NumArgs; ++Arg)
 530           Matcher.getArgKinds(Kind.getMatcherKind(), Arg, ArgsKinds[Arg]);
 531         if (IsPolymorphic)
 532           break;
 533       }
 534     }
 535
 536     if (!RetKinds.empty() && MaxSpecificity > 0) {
 537       std::string Decl;
 538       llvm::raw_string_ostream OS(Decl);
 539
 540       if (IsPolymorphic) {
 541         OS << "Matcher<T> " << Name << "(Matcher<T>";
 542       } else {
 543         OS << "Matcher<" << RetKinds << "> " << Name << "(";
 544         for (const std::vector<ArgKind> &Arg : ArgsKinds) {
 545           if (&Arg != &ArgsKinds[0])
 546             OS << ", ";
 547
 548           bool FirstArgKind = true;
 549           std::set<ASTNodeKind> MatcherKinds;
 550           // Two steps. First all non-matchers, then matchers only.
 551           for (const ArgKind &AK : Arg) {
 552             if (AK.getArgKind() == ArgKind::AK_Matcher) {
 553               MatcherKinds.insert(AK.getMatcherKind());
 554             } else {
 555               if (!FirstArgKind) OS << "|";
 556               FirstArgKind = false;
 557               OS << AK.asString();
 558             }
 559           }
 560           if (!MatcherKinds.empty()) {
 561             if (!FirstArgKind) OS << "|";
 562             OS << "Matcher<" << MatcherKinds << ">";
 563           }
 564         }
 565       }
 566       if (Matcher.isVariadic())
 567         OS << "...";
 568       OS << ")";
 569
 570       std::string TypedText = Name;
 571       TypedText += "(";
 572       if (ArgsKinds.empty())
 573         TypedText += ")";
 574       else if (ArgsKinds[0][0].getArgKind() == ArgKind::AK_String)
 575         TypedText += "\"";
 576
 577       Completions.emplace_back(TypedText, OS.str(), MaxSpecificity);
 578     }
 579   }
 580
 581   return Completions;
 582 }
 583
 584 // static
 585 VariantMatcher Registry::constructMatcher(MatcherCtor Ctor,
 586                                           SourceRange NameRange,
 587                                           ArrayRef<ParserValue> Args,
 588                                           Diagnostics *Error) {
 589   return Ctor->create(NameRange, Args, Error);
 590 }
 591
 592 // static
 593 VariantMatcher Registry::constructBoundMatcher(MatcherCtor Ctor,
 594                                                SourceRange NameRange,
 595                                                StringRef BindID,
 596                                                ArrayRef<ParserValue> Args,
 597                                                Diagnostics *Error) {
 598   VariantMatcher Out = constructMatcher(Ctor, NameRange, Args, Error);
 599   if (Out.isNull()) return Out;
 600
 601   llvm::Optional<DynTypedMatcher> Result = Out.getSingleMatcher();
 602   if (Result.hasValue()) {
 603     llvm::Optional<DynTypedMatcher> Bound = Result->tryBind(BindID);
 604     if (Bound.hasValue()) {
 605       return VariantMatcher::SingleMatcher(*Bound);
 606     }
 607   }
 608   Error->addError(NameRange, Error->ET_RegistryNotBindable);
 609   return VariantMatcher();
 610 }
 611
 612 }  // namespace dynamic
 613 }  // namespace ast_matchers
 614 }  // namespace clang