llvm-project/clang/lib/ASTMatchers/ASTMatchersInternal.cpp

//===- ASTMatchersInternal.cpp - Structural query framework ---------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//  Implements the base layer of the matcher framework.
//
//===----------------------------------------------------------------------===//

#include "clang/ASTMatchers/ASTMatchersInternal.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/ASTTypeTraits.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/PrettyPrinter.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/Basic/LLVM.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "llvm/ADT/None.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cassert>
#include <cstddef>
#include <string>
#include <utility>
#include <vector>

namespace clang {
namespace ast_matchers {

AST_MATCHER_P(ObjCMessageExpr, hasAnySelectorMatcher, std::vector<std::string>,
              Matches) {
  std::string SelString = Node.getSelector().getAsString();
  for (const std::string &S : Matches)
    if (S == SelString)
      return true;
  return false;
}

namespace internal {

bool NotUnaryOperator(const ast_type_traits::DynTypedNode &DynNode,
                      ASTMatchFinder *Finder, BoundNodesTreeBuilder *Builder,
                      ArrayRef<DynTypedMatcher> InnerMatchers);

bool AllOfVariadicOperator(const ast_type_traits::DynTypedNode &DynNode,
                           ASTMatchFinder *Finder,
                           BoundNodesTreeBuilder *Builder,
                           ArrayRef<DynTypedMatcher> InnerMatchers);

bool EachOfVariadicOperator(const ast_type_traits::DynTypedNode &DynNode,
                            ASTMatchFinder *Finder,
                            BoundNodesTreeBuilder *Builder,
                            ArrayRef<DynTypedMatcher> InnerMatchers);

bool AnyOfVariadicOperator(const ast_type_traits::DynTypedNode &DynNode,
                           ASTMatchFinder *Finder,
                           BoundNodesTreeBuilder *Builder,
                           ArrayRef<DynTypedMatcher> InnerMatchers);

void BoundNodesTreeBuilder::visitMatches(Visitor *ResultVisitor) {
  if (Bindings.empty())
    Bindings.push_back(BoundNodesMap());
  for (BoundNodesMap &Binding : Bindings) {
    ResultVisitor->visitMatch(BoundNodes(Binding));
  }
}

namespace {

using VariadicOperatorFunction = bool (*)(
    const ast_type_traits::DynTypedNode &DynNode, ASTMatchFinder *Finder,
    BoundNodesTreeBuilder *Builder, ArrayRef<DynTypedMatcher> InnerMatchers);

template <VariadicOperatorFunction Func>
class VariadicMatcher : public DynMatcherInterface {
public:
  VariadicMatcher(std::vector<DynTypedMatcher> InnerMatchers)
      : InnerMatchers(std::move(InnerMatchers)) {}

  bool dynMatches(const ast_type_traits::DynTypedNode &DynNode,
                  ASTMatchFinder *Finder,
                  BoundNodesTreeBuilder *Builder) const override {
    return Func(DynNode, Finder, Builder, InnerMatchers);
  }

private:
  std::vector<DynTypedMatcher> InnerMatchers;
};

class IdDynMatcher : public DynMatcherInterface {
public:
  IdDynMatcher(StringRef ID,
               IntrusiveRefCntPtr<DynMatcherInterface> InnerMatcher)
      : ID(ID), InnerMatcher(std::move(InnerMatcher)) {}

  bool dynMatches(const ast_type_traits::DynTypedNode &DynNode,
                  ASTMatchFinder *Finder,
                  BoundNodesTreeBuilder *Builder) const override {
    bool Result = InnerMatcher->dynMatches(DynNode, Finder, Builder);
    if (Result) Builder->setBinding(ID, DynNode);
    return Result;
  }

private:
  const std::string ID;
  const IntrusiveRefCntPtr<DynMatcherInterface> InnerMatcher;
};

/// A matcher that always returns true.
///
/// We only ever need one instance of this matcher, so we create a global one
/// and reuse it to reduce the overhead of the matcher and increase the chance
/// of cache hits.
class TrueMatcherImpl : public DynMatcherInterface {
public:
  TrueMatcherImpl() {
    Retain(); // Reference count will never become zero.
  }

  bool dynMatches(const ast_type_traits::DynTypedNode &, ASTMatchFinder *,
                  BoundNodesTreeBuilder *) const override {
    return true;
  }
};

} // namespace

static llvm::ManagedStatic<TrueMatcherImpl> TrueMatcherInstance;

DynTypedMatcher DynTypedMatcher::constructVariadic(
    DynTypedMatcher::VariadicOperator Op,
    ast_type_traits::ASTNodeKind SupportedKind,
    std::vector<DynTypedMatcher> InnerMatchers) {
  assert(!InnerMatchers.empty() && "Array must not be empty.");
  assert(llvm::all_of(InnerMatchers,
                      [SupportedKind](const DynTypedMatcher &M) {
                        return M.canConvertTo(SupportedKind);
                      }) &&
         "InnerMatchers must be convertible to SupportedKind!");

  // We must relax the restrict kind here.
  // The different operators might deal differently with a mismatch.
  // Make it the same as SupportedKind, since that is the broadest type we are
  // allowed to accept.
  auto RestrictKind = SupportedKind;

  switch (Op) {
  case VO_AllOf:
    // In the case of allOf() we must pass all the checks, so making
    // RestrictKind the most restrictive can save us time. This way we reject
    // invalid types earlier and we can elide the kind checks inside the
    // matcher.
    for (auto &IM : InnerMatchers) {
      RestrictKind = ast_type_traits::ASTNodeKind::getMostDerivedType(
          RestrictKind, IM.RestrictKind);
    }
    return DynTypedMatcher(
        SupportedKind, RestrictKind,
        new VariadicMatcher<AllOfVariadicOperator>(std::move(InnerMatchers)));

  case VO_AnyOf:
    return DynTypedMatcher(
        SupportedKind, RestrictKind,
        new VariadicMatcher<AnyOfVariadicOperator>(std::move(InnerMatchers)));

  case VO_EachOf:
    return DynTypedMatcher(
        SupportedKind, RestrictKind,
        new VariadicMatcher<EachOfVariadicOperator>(std::move(InnerMatchers)));

  case VO_UnaryNot:
    // FIXME: Implement the Not operator to take a single matcher instead of a
    // vector.
    return DynTypedMatcher(
        SupportedKind, RestrictKind,
        new VariadicMatcher<NotUnaryOperator>(std::move(InnerMatchers)));
  }
  llvm_unreachable("Invalid Op value.");
}

DynTypedMatcher DynTypedMatcher::trueMatcher(
    ast_type_traits::ASTNodeKind NodeKind) {
  return DynTypedMatcher(NodeKind, NodeKind, &*TrueMatcherInstance);
}

bool DynTypedMatcher::canMatchNodesOfKind(
    ast_type_traits::ASTNodeKind Kind) const {
  return RestrictKind.isBaseOf(Kind);
}

DynTypedMatcher DynTypedMatcher::dynCastTo(
    const ast_type_traits::ASTNodeKind Kind) const {
  auto Copy = *this;
  Copy.SupportedKind = Kind;
  Copy.RestrictKind =
      ast_type_traits::ASTNodeKind::getMostDerivedType(Kind, RestrictKind);
  return Copy;
}

bool DynTypedMatcher::matches(const ast_type_traits::DynTypedNode &DynNode,
                              ASTMatchFinder *Finder,
                              BoundNodesTreeBuilder *Builder) const {
  if (RestrictKind.isBaseOf(DynNode.getNodeKind()) &&
      Implementation->dynMatches(DynNode, Finder, Builder)) {
    return true;
  }
  // Delete all bindings when a matcher does not match.
  // This prevents unexpected exposure of bound nodes in unmatches
  // branches of the match tree.
  Builder->removeBindings([](const BoundNodesMap &) { return true; });
  return false;
}

bool DynTypedMatcher::matchesNoKindCheck(
    const ast_type_traits::DynTypedNode &DynNode, ASTMatchFinder *Finder,
    BoundNodesTreeBuilder *Builder) const {
  assert(RestrictKind.isBaseOf(DynNode.getNodeKind()));
  if (Implementation->dynMatches(DynNode, Finder, Builder)) {
    return true;
  }
  // Delete all bindings when a matcher does not match.
  // This prevents unexpected exposure of bound nodes in unmatches
  // branches of the match tree.
  Builder->removeBindings([](const BoundNodesMap &) { return true; });
  return false;
}

llvm::Optional<DynTypedMatcher> DynTypedMatcher::tryBind(StringRef ID) const {
  if (!AllowBind) return llvm::None;
  auto Result = *this;
  Result.Implementation =
      new IdDynMatcher(ID, std::move(Result.Implementation));
  return std::move(Result);
}

bool DynTypedMatcher::canConvertTo(ast_type_traits::ASTNodeKind To) const {
  const auto From = getSupportedKind();
  auto QualKind = ast_type_traits::ASTNodeKind::getFromNodeKind<QualType>();
  auto TypeKind = ast_type_traits::ASTNodeKind::getFromNodeKind<Type>();
  /// Mimic the implicit conversions of Matcher<>.
  /// - From Matcher<Type> to Matcher<QualType>
  if (From.isSame(TypeKind) && To.isSame(QualKind)) return true;
  /// - From Matcher<Base> to Matcher<Derived>
  return From.isBaseOf(To);
}

void BoundNodesTreeBuilder::addMatch(const BoundNodesTreeBuilder &Other) {
  Bindings.append(Other.Bindings.begin(), Other.Bindings.end());
}

bool NotUnaryOperator(const ast_type_traits::DynTypedNode &DynNode,
                      ASTMatchFinder *Finder, BoundNodesTreeBuilder *Builder,
                      ArrayRef<DynTypedMatcher> InnerMatchers) {
  if (InnerMatchers.size() != 1)
    return false;

  // The 'unless' matcher will always discard the result:
  // If the inner matcher doesn't match, unless returns true,
  // but the inner matcher cannot have bound anything.
  // If the inner matcher matches, the result is false, and
  // any possible binding will be discarded.
  // We still need to hand in all the bound nodes up to this
  // point so the inner matcher can depend on bound nodes,
  // and we need to actively discard the bound nodes, otherwise
  // the inner matcher will reset the bound nodes if it doesn't
  // match, but this would be inversed by 'unless'.
  BoundNodesTreeBuilder Discard(*Builder);
  return !InnerMatchers[0].matches(DynNode, Finder, &Discard);
}

bool AllOfVariadicOperator(const ast_type_traits::DynTypedNode &DynNode,
                           ASTMatchFinder *Finder,
                           BoundNodesTreeBuilder *Builder,
                           ArrayRef<DynTypedMatcher> InnerMatchers) {
  // allOf leads to one matcher for each alternative in the first
  // matcher combined with each alternative in the second matcher.
  // Thus, we can reuse the same Builder.
  for (const DynTypedMatcher &InnerMatcher : InnerMatchers) {
    if (!InnerMatcher.matchesNoKindCheck(DynNode, Finder, Builder))
      return false;
  }
  return true;
}

bool EachOfVariadicOperator(const ast_type_traits::DynTypedNode &DynNode,
                            ASTMatchFinder *Finder,
                            BoundNodesTreeBuilder *Builder,
                            ArrayRef<DynTypedMatcher> InnerMatchers) {
  BoundNodesTreeBuilder Result;
  bool Matched = false;
  for (const DynTypedMatcher &InnerMatcher : InnerMatchers) {
    BoundNodesTreeBuilder BuilderInner(*Builder);
    if (InnerMatcher.matches(DynNode, Finder, &BuilderInner)) {
      Matched = true;
      Result.addMatch(BuilderInner);
    }
  }
  *Builder = std::move(Result);
  return Matched;
}

bool AnyOfVariadicOperator(const ast_type_traits::DynTypedNode &DynNode,
                           ASTMatchFinder *Finder,
                           BoundNodesTreeBuilder *Builder,
                           ArrayRef<DynTypedMatcher> InnerMatchers) {
  for (const DynTypedMatcher &InnerMatcher : InnerMatchers) {
    BoundNodesTreeBuilder Result = *Builder;
    if (InnerMatcher.matches(DynNode, Finder, &Result)) {
      *Builder = std::move(Result);
      return true;
    }
  }
  return false;
}

inline static
std::vector<std::string> vectorFromRefs(ArrayRef<const StringRef *> NameRefs) {
  std::vector<std::string> Names;
  for (auto *Name : NameRefs)
    Names.emplace_back(*Name);
  return Names;
}

Matcher<NamedDecl> hasAnyNameFunc(ArrayRef<const StringRef *> NameRefs) {
  std::vector<std::string> Names = vectorFromRefs(NameRefs);
  return internal::Matcher<NamedDecl>(new internal::HasNameMatcher(Names));
}

Matcher<ObjCMessageExpr> hasAnySelectorFunc(
    ArrayRef<const StringRef *> NameRefs) {
  return hasAnySelectorMatcher(vectorFromRefs(NameRefs));
}

HasNameMatcher::HasNameMatcher(std::vector<std::string> N)
    : UseUnqualifiedMatch(std::all_of(
          N.begin(), N.end(),
          [](StringRef Name) { return Name.find("::") == Name.npos; })),
      Names(std::move(N)) {
#ifndef NDEBUG
  for (StringRef Name : Names)
    assert(!Name.empty());
#endif
}

static bool consumeNameSuffix(StringRef &FullName, StringRef Suffix) {
  StringRef Name = FullName;
  if (!Name.endswith(Suffix))
    return false;
  Name = Name.drop_back(Suffix.size());
  if (!Name.empty()) {
    if (!Name.endswith("::"))
      return false;
    Name = Name.drop_back(2);
  }
  FullName = Name;
  return true;
}

static StringRef getNodeName(const NamedDecl &Node,
                             llvm::SmallString<128> &Scratch) {
  // Simple name.
  if (Node.getIdentifier())
    return Node.getName();

  if (Node.getDeclName()) {
    // Name needs to be constructed.
    Scratch.clear();
    llvm::raw_svector_ostream OS(Scratch);
    Node.printName(OS);
    return OS.str();
  }

  return "(anonymous)";
}

static StringRef getNodeName(const RecordDecl &Node,
                             llvm::SmallString<128> &Scratch) {
  if (Node.getIdentifier()) {
    return Node.getName();
  }
  Scratch.clear();
  return ("(anonymous " + Node.getKindName() + ")").toStringRef(Scratch);
}

static StringRef getNodeName(const NamespaceDecl &Node,
                             llvm::SmallString<128> &Scratch) {
  return Node.isAnonymousNamespace() ? "(anonymous namespace)" : Node.getName();
}

namespace {

class PatternSet {
public:
  PatternSet(ArrayRef<std::string> Names) {
    for (StringRef Name : Names)
      Patterns.push_back({Name, Name.startswith("::")});
  }

  /// Consumes the name suffix from each pattern in the set and removes the ones
  /// that didn't match.
  /// Return true if there are still any patterns left.
  bool consumeNameSuffix(StringRef NodeName, bool CanSkip) {
    for (size_t I = 0; I < Patterns.size();) {
      if (::clang::ast_matchers::internal::consumeNameSuffix(Patterns[I].P,
                                                             NodeName) ||
          CanSkip) {
        ++I;
      } else {
        Patterns.erase(Patterns.begin() + I);
      }
    }
    return !Patterns.empty();
  }

  /// Check if any of the patterns are a match.
  /// A match will be a pattern that was fully consumed, that also matches the
  /// 'fully qualified' requirement.
  bool foundMatch(bool AllowFullyQualified) const {
    for (auto& P: Patterns)
      if (P.P.empty() && (AllowFullyQualified || !P.IsFullyQualified))
        return true;
    return false;
  }

private:
  struct Pattern {
    StringRef P;
    bool IsFullyQualified;
  };

  llvm::SmallVector<Pattern, 8> Patterns;
};

} // namespace

bool HasNameMatcher::matchesNodeUnqualified(const NamedDecl &Node) const {
  assert(UseUnqualifiedMatch);
  llvm::SmallString<128> Scratch;
  StringRef NodeName = getNodeName(Node, Scratch);
  return llvm::any_of(Names, [&](StringRef Name) {
    return consumeNameSuffix(Name, NodeName) && Name.empty();
  });
}

bool HasNameMatcher::matchesNodeFullFast(const NamedDecl &Node) const {
  PatternSet Patterns(Names);
  llvm::SmallString<128> Scratch;

  // This function is copied and adapted from NamedDecl::printQualifiedName()
  // By matching each part individually we optimize in a couple of ways:
  //  - We can exit early on the first failure.
  //  - We can skip inline/anonymous namespaces without another pass.
  //  - We print one name at a time, reducing the chance of overflowing the
  //    inlined space of the SmallString.

  // First, match the name.
  if (!Patterns.consumeNameSuffix(getNodeName(Node, Scratch),
                                  /*CanSkip=*/false))
    return false;

  // Try to match each declaration context.
  // We are allowed to skip anonymous and inline namespaces if they don't match.
  const DeclContext *Ctx = Node.getDeclContext();

  if (Ctx->isFunctionOrMethod())
    return Patterns.foundMatch(/*AllowFullyQualified=*/false);

  for (; Ctx && isa<NamedDecl>(Ctx); Ctx = Ctx->getParent()) {
    if (Patterns.foundMatch(/*AllowFullyQualified=*/false))
      return true;

    if (const auto *ND = dyn_cast<NamespaceDecl>(Ctx)) {
      // If it matches (or we can skip it), continue.
      if (Patterns.consumeNameSuffix(getNodeName(*ND, Scratch),
                                     /*CanSkip=*/ND->isAnonymousNamespace() ||
                                         ND->isInline()))
        continue;
      return false;
    }
    if (const auto *RD = dyn_cast<RecordDecl>(Ctx)) {
      if (!isa<ClassTemplateSpecializationDecl>(Ctx)) {
        if (Patterns.consumeNameSuffix(getNodeName(*RD, Scratch),
                                       /*CanSkip=*/false))
          continue;

        return false;
      }
    }

    // We don't know how to deal with this DeclContext.
    // Fallback to the slow version of the code.
    return matchesNodeFullSlow(Node);
  }

  return Patterns.foundMatch(/*AllowFullyQualified=*/true);
}

bool HasNameMatcher::matchesNodeFullSlow(const NamedDecl &Node) const {
  const bool SkipUnwrittenCases[] = {false, true};
  for (bool SkipUnwritten : SkipUnwrittenCases) {
    llvm::SmallString<128> NodeName = StringRef("::");
    llvm::raw_svector_ostream OS(NodeName);

    if (SkipUnwritten) {
      PrintingPolicy Policy = Node.getASTContext().getPrintingPolicy();
      Policy.SuppressUnwrittenScope = true;
      Node.printQualifiedName(OS, Policy);
    } else {
      Node.printQualifiedName(OS);
    }

    const StringRef FullName = OS.str();

    for (const StringRef Pattern : Names) {
      if (Pattern.startswith("::")) {
        if (FullName == Pattern)
          return true;
      } else if (FullName.endswith(Pattern) &&
                 FullName.drop_back(Pattern.size()).endswith("::")) {
        return true;
      }
    }
  }

  return false;
}

bool HasNameMatcher::matchesNode(const NamedDecl &Node) const {
  assert(matchesNodeFullFast(Node) == matchesNodeFullSlow(Node));
  if (UseUnqualifiedMatch) {
    assert(matchesNodeUnqualified(Node) == matchesNodeFullFast(Node));
    return matchesNodeUnqualified(Node);
  }
  return matchesNodeFullFast(Node);
}

} // end namespace internal

const internal::VariadicDynCastAllOfMatcher<Stmt, ObjCAutoreleasePoolStmt>
    autoreleasePoolStmt;
const internal::VariadicDynCastAllOfMatcher<Decl, TranslationUnitDecl>
    translationUnitDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, TypedefDecl> typedefDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, TypedefNameDecl>
    typedefNameDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, TypeAliasDecl> typeAliasDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, TypeAliasTemplateDecl>
    typeAliasTemplateDecl;
const internal::VariadicAllOfMatcher<Decl> decl;
const internal::VariadicDynCastAllOfMatcher<Decl, LinkageSpecDecl>
    linkageSpecDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, NamedDecl> namedDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, LabelDecl> labelDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, NamespaceDecl> namespaceDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, NamespaceAliasDecl>
    namespaceAliasDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, RecordDecl> recordDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, CXXRecordDecl> cxxRecordDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, ClassTemplateDecl>
    classTemplateDecl;
const internal::VariadicDynCastAllOfMatcher<Decl,
                                            ClassTemplateSpecializationDecl>
    classTemplateSpecializationDecl;
const internal::VariadicDynCastAllOfMatcher<
    Decl, ClassTemplatePartialSpecializationDecl>
    classTemplatePartialSpecializationDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, DeclaratorDecl>
    declaratorDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, ParmVarDecl> parmVarDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, AccessSpecDecl>
    accessSpecDecl;
const internal::VariadicAllOfMatcher<CXXCtorInitializer> cxxCtorInitializer;
const internal::VariadicAllOfMatcher<TemplateArgument> templateArgument;
const internal::VariadicAllOfMatcher<TemplateName> templateName;
const internal::VariadicDynCastAllOfMatcher<Decl, NonTypeTemplateParmDecl>
    nonTypeTemplateParmDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, TemplateTypeParmDecl>
    templateTypeParmDecl;
const internal::VariadicAllOfMatcher<QualType> qualType;
const internal::VariadicAllOfMatcher<Type> type;
const internal::VariadicAllOfMatcher<TypeLoc> typeLoc;
const internal::VariadicDynCastAllOfMatcher<Stmt, UnaryExprOrTypeTraitExpr>
    unaryExprOrTypeTraitExpr;
const internal::VariadicDynCastAllOfMatcher<Decl, ValueDecl> valueDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, CXXConstructorDecl>
    cxxConstructorDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, CXXDestructorDecl>
    cxxDestructorDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, EnumDecl> enumDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, EnumConstantDecl>
    enumConstantDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, CXXMethodDecl> cxxMethodDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, CXXConversionDecl>
    cxxConversionDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, VarDecl> varDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, FieldDecl> fieldDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, FunctionDecl> functionDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, FunctionTemplateDecl>
    functionTemplateDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, FriendDecl> friendDecl;
const internal::VariadicAllOfMatcher<Stmt> stmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, DeclStmt> declStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, MemberExpr> memberExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, UnresolvedMemberExpr>
    unresolvedMemberExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXDependentScopeMemberExpr>
    cxxDependentScopeMemberExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CallExpr> callExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, LambdaExpr> lambdaExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXMemberCallExpr>
    cxxMemberCallExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, ObjCMessageExpr>
    objcMessageExpr;
const internal::VariadicDynCastAllOfMatcher<Decl, ObjCInterfaceDecl>
    objcInterfaceDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, ObjCImplementationDecl>
    objcImplementationDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, ObjCProtocolDecl>
    objcProtocolDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, ObjCCategoryDecl>
    objcCategoryDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, ObjCCategoryImplDecl>
    objcCategoryImplDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, ObjCMethodDecl>
    objcMethodDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, BlockDecl>
    blockDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, ObjCIvarDecl> objcIvarDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, ObjCPropertyDecl>
    objcPropertyDecl;
const internal::VariadicDynCastAllOfMatcher<Stmt, ObjCAtThrowStmt>
    objcThrowStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, ObjCAtTryStmt> objcTryStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, ObjCAtCatchStmt>
    objcCatchStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, ObjCAtFinallyStmt>
    objcFinallyStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, ExprWithCleanups>
    exprWithCleanups;
const internal::VariadicDynCastAllOfMatcher<Stmt, InitListExpr> initListExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXStdInitializerListExpr>
    cxxStdInitializerListExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, ImplicitValueInitExpr>
    implicitValueInitExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, ParenListExpr> parenListExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, SubstNonTypeTemplateParmExpr>
    substNonTypeTemplateParmExpr;
const internal::VariadicDynCastAllOfMatcher<Decl, UsingDecl> usingDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, UsingDirectiveDecl>
    usingDirectiveDecl;
const internal::VariadicDynCastAllOfMatcher<Stmt, UnresolvedLookupExpr>
    unresolvedLookupExpr;
const internal::VariadicDynCastAllOfMatcher<Decl, UnresolvedUsingValueDecl>
    unresolvedUsingValueDecl;
const internal::VariadicDynCastAllOfMatcher<Decl, UnresolvedUsingTypenameDecl>
    unresolvedUsingTypenameDecl;
const internal::VariadicDynCastAllOfMatcher<Stmt, ConstantExpr> constantExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, ParenExpr> parenExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXConstructExpr>
    cxxConstructExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXUnresolvedConstructExpr>
    cxxUnresolvedConstructExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXThisExpr> cxxThisExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXBindTemporaryExpr>
    cxxBindTemporaryExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, MaterializeTemporaryExpr>
    materializeTemporaryExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXNewExpr> cxxNewExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXDeleteExpr> cxxDeleteExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, ArraySubscriptExpr>
    arraySubscriptExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXDefaultArgExpr>
    cxxDefaultArgExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXOperatorCallExpr>
    cxxOperatorCallExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, Expr> expr;
const internal::VariadicDynCastAllOfMatcher<Stmt, DeclRefExpr> declRefExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, ObjCIvarRefExpr> objcIvarRefExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, IfStmt> ifStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, ForStmt> forStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXForRangeStmt>
    cxxForRangeStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, WhileStmt> whileStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, DoStmt> doStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, BreakStmt> breakStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, ContinueStmt> continueStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, ReturnStmt> returnStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, GotoStmt> gotoStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, LabelStmt> labelStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, AddrLabelExpr> addrLabelExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, SwitchStmt> switchStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, SwitchCase> switchCase;
const internal::VariadicDynCastAllOfMatcher<Stmt, CaseStmt> caseStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, DefaultStmt> defaultStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, CompoundStmt> compoundStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXCatchStmt> cxxCatchStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXTryStmt> cxxTryStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXThrowExpr> cxxThrowExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, NullStmt> nullStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, AsmStmt> asmStmt;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXBoolLiteralExpr>
    cxxBoolLiteral;
const internal::VariadicDynCastAllOfMatcher<Stmt, StringLiteral> stringLiteral;
const internal::VariadicDynCastAllOfMatcher<Stmt, CharacterLiteral>
    characterLiteral;
const internal::VariadicDynCastAllOfMatcher<Stmt, IntegerLiteral>
    integerLiteral;
const internal::VariadicDynCastAllOfMatcher<Stmt, FloatingLiteral> floatLiteral;
const internal::VariadicDynCastAllOfMatcher<Stmt, ImaginaryLiteral> imaginaryLiteral;
const internal::VariadicDynCastAllOfMatcher<Stmt, UserDefinedLiteral>
    userDefinedLiteral;
const internal::VariadicDynCastAllOfMatcher<Stmt, CompoundLiteralExpr>
    compoundLiteralExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXNullPtrLiteralExpr>
    cxxNullPtrLiteralExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, GNUNullExpr> gnuNullExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, AtomicExpr> atomicExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, StmtExpr> stmtExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, BinaryOperator>
    binaryOperator;
const internal::VariadicDynCastAllOfMatcher<Stmt, UnaryOperator> unaryOperator;
const internal::VariadicDynCastAllOfMatcher<Stmt, ConditionalOperator>
    conditionalOperator;
const internal::VariadicDynCastAllOfMatcher<Stmt, BinaryConditionalOperator>
    binaryConditionalOperator;
const internal::VariadicDynCastAllOfMatcher<Stmt, OpaqueValueExpr>
    opaqueValueExpr;
const internal::VariadicDynCastAllOfMatcher<Decl, StaticAssertDecl>
    staticAssertDecl;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXReinterpretCastExpr>
    cxxReinterpretCastExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXStaticCastExpr>
    cxxStaticCastExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXDynamicCastExpr>
    cxxDynamicCastExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXConstCastExpr>
    cxxConstCastExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CStyleCastExpr>
    cStyleCastExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, ExplicitCastExpr>
    explicitCastExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, ImplicitCastExpr>
    implicitCastExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CastExpr> castExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXFunctionalCastExpr>
    cxxFunctionalCastExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, CXXTemporaryObjectExpr>
    cxxTemporaryObjectExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, PredefinedExpr>
    predefinedExpr;
const internal::VariadicDynCastAllOfMatcher<Stmt, DesignatedInitExpr>
    designatedInitExpr;
const internal::VariadicOperatorMatcherFunc<
    2, std::numeric_limits<unsigned>::max()>
    eachOf = {internal::DynTypedMatcher::VO_EachOf};
const internal::VariadicOperatorMatcherFunc<
    2, std::numeric_limits<unsigned>::max()>
    anyOf = {internal::DynTypedMatcher::VO_AnyOf};
const internal::VariadicOperatorMatcherFunc<
    2, std::numeric_limits<unsigned>::max()>
    allOf = {internal::DynTypedMatcher::VO_AllOf};
const internal::VariadicFunction<internal::Matcher<NamedDecl>, StringRef,
                                 internal::hasAnyNameFunc>
    hasAnyName = {};
const internal::VariadicFunction<internal::Matcher<ObjCMessageExpr>, StringRef,
                                 internal::hasAnySelectorFunc>
    hasAnySelector = {};
const internal::ArgumentAdaptingMatcherFunc<internal::HasMatcher> has = {};
const internal::ArgumentAdaptingMatcherFunc<internal::HasDescendantMatcher>
    hasDescendant = {};
const internal::ArgumentAdaptingMatcherFunc<internal::ForEachMatcher> forEach =
    {};
const internal::ArgumentAdaptingMatcherFunc<internal::ForEachDescendantMatcher>
    forEachDescendant = {};
const internal::ArgumentAdaptingMatcherFunc<
    internal::HasParentMatcher,
    internal::TypeList<Decl, NestedNameSpecifierLoc, Stmt, TypeLoc>,
    internal::TypeList<Decl, NestedNameSpecifierLoc, Stmt, TypeLoc>>
    hasParent = {};
const internal::ArgumentAdaptingMatcherFunc<
    internal::HasAncestorMatcher,
    internal::TypeList<Decl, NestedNameSpecifierLoc, Stmt, TypeLoc>,
    internal::TypeList<Decl, NestedNameSpecifierLoc, Stmt, TypeLoc>>
    hasAncestor = {};
const internal::VariadicOperatorMatcherFunc<1, 1> unless = {
    internal::DynTypedMatcher::VO_UnaryNot};
const internal::VariadicAllOfMatcher<NestedNameSpecifier> nestedNameSpecifier;
const internal::VariadicAllOfMatcher<NestedNameSpecifierLoc>
    nestedNameSpecifierLoc;
const internal::VariadicDynCastAllOfMatcher<Stmt, CUDAKernelCallExpr>
    cudaKernelCallExpr;
const AstTypeMatcher<BuiltinType> builtinType;
const AstTypeMatcher<ArrayType> arrayType;
const AstTypeMatcher<ComplexType> complexType;
const AstTypeMatcher<ConstantArrayType> constantArrayType;
const AstTypeMatcher<DependentSizedArrayType> dependentSizedArrayType;
const AstTypeMatcher<IncompleteArrayType> incompleteArrayType;
const AstTypeMatcher<VariableArrayType> variableArrayType;
const AstTypeMatcher<AtomicType> atomicType;
const AstTypeMatcher<AutoType> autoType;
const AstTypeMatcher<DecltypeType> decltypeType;
const AstTypeMatcher<FunctionType> functionType;
const AstTypeMatcher<FunctionProtoType> functionProtoType;
const AstTypeMatcher<ParenType> parenType;
const AstTypeMatcher<BlockPointerType> blockPointerType;
const AstTypeMatcher<MemberPointerType> memberPointerType;
const AstTypeMatcher<PointerType> pointerType;
const AstTypeMatcher<ObjCObjectPointerType> objcObjectPointerType;
const AstTypeMatcher<ReferenceType> referenceType;
const AstTypeMatcher<LValueReferenceType> lValueReferenceType;
const AstTypeMatcher<RValueReferenceType> rValueReferenceType;
const AstTypeMatcher<TypedefType> typedefType;
const AstTypeMatcher<EnumType> enumType;
const AstTypeMatcher<TemplateSpecializationType> templateSpecializationType;
const AstTypeMatcher<UnaryTransformType> unaryTransformType;
const AstTypeMatcher<RecordType> recordType;
const AstTypeMatcher<TagType> tagType;
const AstTypeMatcher<ElaboratedType> elaboratedType;
const AstTypeMatcher<SubstTemplateTypeParmType> substTemplateTypeParmType;
const AstTypeMatcher<TemplateTypeParmType> templateTypeParmType;
const AstTypeMatcher<InjectedClassNameType> injectedClassNameType;
const AstTypeMatcher<DecayedType> decayedType;
AST_TYPELOC_TRAVERSE_MATCHER_DEF(hasElementType,
                                 AST_POLYMORPHIC_SUPPORTED_TYPES(ArrayType,
                                                                 ComplexType));
AST_TYPELOC_TRAVERSE_MATCHER_DEF(hasValueType,
                                 AST_POLYMORPHIC_SUPPORTED_TYPES(AtomicType));
AST_TYPELOC_TRAVERSE_MATCHER_DEF(
    pointee,
    AST_POLYMORPHIC_SUPPORTED_TYPES(BlockPointerType, MemberPointerType,
                                    PointerType, ReferenceType));

} // end namespace ast_matchers
} // end namespace clang