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📄 APValue.h(20.92 KB)
📄 AST.h(907 B)
📄 ASTConcept.h(7.02 KB)
📄 ASTConsumer.h(5.99 KB)
📄 ASTContext.h(122.68 KB)
📄 ASTContextAllocate.h(1.33 KB)
📄 ASTDiagnostic.h(1.34 KB)
📄 ASTDumper.h(1.59 KB)
📄 ASTDumperUtils.h(3.49 KB)
📄 ASTFwd.h(1.01 KB)
📄 ASTImporter.h(22.86 KB)
📄 ASTImporterLookupTable.h(2.7 KB)
📄 ASTImporterSharedState.h(2.51 KB)
📄 ASTLambda.h(3.04 KB)
📄 ASTMutationListener.h(5.84 KB)
📄 ASTNodeTraverser.h(21.38 KB)
📄 ASTStructuralEquivalence.h(5.08 KB)
📄 ASTTypeTraits.h(19.65 KB)
📄 ASTUnresolvedSet.h(3.37 KB)
📄 ASTVector.h(11.75 KB)
📄 AbstractBasicReader.h(8.82 KB)
📄 AbstractBasicWriter.h(7.97 KB)
📄 AbstractTypeReader.h(922 B)
📄 AbstractTypeWriter.h(944 B)
📄 Attr.h(11.87 KB)
📄 AttrIterator.h(4.14 KB)
📄 AttrVisitor.h(2.56 KB)
📄 Availability.h(1.97 KB)
📄 BaseSubobject.h(2.74 KB)
📄 BuiltinTypes.def(9.91 KB)
📄 CXXInheritance.h(14.87 KB)
📄 CXXRecordDeclDefinitionBits.def(9.23 KB)
📄 CanonicalType.h(24.86 KB)
📄 CharUnits.h(8.02 KB)
📄 Comment.h(31.03 KB)
📄 CommentBriefParser.h(1.39 KB)
📄 CommentCommandTraits.h(5.86 KB)
📄 CommentCommands.td(9.27 KB)
📄 CommentDiagnostic.h(509 B)
📄 CommentHTMLNamedCharacterReferences.td(4.98 KB)
📄 CommentHTMLTags.td(2.17 KB)
📄 CommentLexer.h(9.96 KB)
📄 CommentParser.h(3.24 KB)
📄 CommentSema.h(9.87 KB)
📄 CommentVisitor.h(2.38 KB)
📄 ComparisonCategories.h(7.41 KB)
📄 ComputeDependence.h(7.41 KB)
📄 CurrentSourceLocExprScope.h(2.43 KB)
📄 DataCollection.h(2.45 KB)
📄 Decl.h(168.07 KB)
📄 DeclAccessPair.h(1.77 KB)
📄 DeclBase.h(93.13 KB)
📄 DeclCXX.h(151.69 KB)
📄 DeclContextInternals.h(8.22 KB)
📄 DeclFriend.h(8.06 KB)
📄 DeclGroup.h(4.11 KB)
📄 DeclLookups.h(3.64 KB)
📄 DeclObjC.h(101.2 KB)
📄 DeclObjCCommon.h(1.72 KB)
📄 DeclOpenMP.h(19.33 KB)
📄 DeclTemplate.h(122.19 KB)
📄 DeclVisitor.h(2.51 KB)
📄 DeclarationName.h(33.77 KB)
📄 DependenceFlags.h(10.99 KB)
📄 DependentDiagnostic.h(5.4 KB)
📄 EvaluatedExprVisitor.h(4.45 KB)
📄 Expr.h(234.85 KB)
📄 ExprCXX.h(169.78 KB)
📄 ExprConcepts.h(19.62 KB)
📄 ExprObjC.h(58.96 KB)
📄 ExprOpenMP.h(15.48 KB)
📄 ExternalASTMerger.h(8.11 KB)
📄 ExternalASTSource.h(20.55 KB)
📄 FormatString.h(22.81 KB)
📄 GlobalDecl.h(7.16 KB)
📄 JSONNodeDumper.h(17.53 KB)
📄 LambdaCapture.h(4.71 KB)
📄 LexicallyOrderedRecursiveASTVisitor.h(5.92 KB)
📄 LocInfoType.h(1.84 KB)
📄 Mangle.h(10.65 KB)
📄 MangleNumberingContext.h(2 KB)
📄 NSAPI.h(9.23 KB)
📄 NestedNameSpecifier.h(18.53 KB)
📄 NonTrivialTypeVisitor.h(4 KB)
📄 ODRHash.h(3.42 KB)
📄 OSLog.h(5.08 KB)
📄 OpenMPClause.h(276.08 KB)
📄 OperationKinds.def(14.91 KB)
📄 OperationKinds.h(1.5 KB)
📄 OptionalDiagnostic.h(2.39 KB)
📄 ParentMap.h(1.89 KB)
📄 ParentMapContext.h(4.74 KB)
📄 PrettyDeclStackTrace.h(1.39 KB)
📄 PrettyPrinter.h(8.47 KB)
📄 PropertiesBase.td(17.03 KB)
📄 QualTypeNames.h(3.15 KB)
📄 RawCommentList.h(6.6 KB)
📄 RecordLayout.h(11.49 KB)
📄 RecursiveASTVisitor.h(124.41 KB)
📄 Redeclarable.h(14.34 KB)
📄 SelectorLocationsKind.h(3.28 KB)
📄 Stmt.h(113 KB)
📄 StmtCXX.h(17.59 KB)
📄 StmtDataCollectors.td(5.64 KB)
📄 StmtGraphTraits.h(2.18 KB)
📄 StmtIterator.h(4.2 KB)
📄 StmtObjC.h(12.86 KB)
📄 StmtOpenMP.h(189.5 KB)
📄 StmtVisitor.h(8.74 KB)
📄 TemplateArgumentVisitor.h(3.38 KB)
📄 TemplateBase.h(22.86 KB)
📄 TemplateName.h(19.34 KB)
📄 TextNodeDumper.h(15.7 KB)
📄 Type.h(248.38 KB)
📄 TypeLoc.h(73.03 KB)
📄 TypeLocNodes.def(1.45 KB)
📄 TypeLocVisitor.h(1.76 KB)
📄 TypeOrdering.h(2.38 KB)
📄 TypeProperties.td(25.87 KB)
📄 TypeVisitor.h(3.32 KB)
📄 UnresolvedSet.h(5.25 KB)
📄 VTTBuilder.h(5.19 KB)
📄 VTableBuilder.h(20.31 KB)

Editing: TemplateBase.h

//===- TemplateBase.h - Core classes for C++ templates ----------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
//  This file provides definitions which are common for all kinds of
//  template representation.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_AST_TEMPLATEBASE_H
#define LLVM_CLANG_AST_TEMPLATEBASE_H

#include "clang/AST/DependenceFlags.h"
#include "clang/AST/NestedNameSpecifier.h"
#include "clang/AST/TemplateName.h"
#include "clang/AST/Type.h"
#include "clang/Basic/LLVM.h"
#include "clang/Basic/SourceLocation.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/APSInt.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/None.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/TrailingObjects.h"
#include <cassert>
#include <cstddef>
#include <cstdint>

namespace llvm {

class FoldingSetNodeID;

} // namespace llvm

namespace clang {

class ASTContext;
class DiagnosticBuilder;
class Expr;
struct PrintingPolicy;
class TypeSourceInfo;
class ValueDecl;

/// Represents a template argument.
class TemplateArgument {
public:
  /// The kind of template argument we're storing.
  enum ArgKind {
    /// Represents an empty template argument, e.g., one that has not
    /// been deduced.
    Null = 0,

/// The template argument is a type.
    Type,

/// The template argument is a declaration that was provided for a pointer,
    /// reference, or pointer to member non-type template parameter.
    Declaration,

/// The template argument is a null pointer or null pointer to member that
    /// was provided for a non-type template parameter.
    NullPtr,

/// The template argument is an integral value stored in an llvm::APSInt
    /// that was provided for an integral non-type template parameter.
    Integral,

/// The template argument is a template name that was provided for a
    /// template template parameter.
    Template,

/// The template argument is a pack expansion of a template name that was
    /// provided for a template template parameter.
    TemplateExpansion,

/// The template argument is an expression, and we've not resolved it to one
    /// of the other forms yet, either because it's dependent or because we're
    /// representing a non-canonical template argument (for instance, in a
    /// TemplateSpecializationType).
    Expression,

/// The template argument is actually a parameter pack. Arguments are stored
    /// in the Args struct.
    Pack
  };

private:
  /// The kind of template argument we're storing.

struct DA {
    unsigned Kind;
    void *QT;
    ValueDecl *D;
  };
  struct I {
    unsigned Kind;
    // We store a decomposed APSInt with the data allocated by ASTContext if
    // BitWidth > 64. The memory may be shared between multiple
    // TemplateArgument instances.
    unsigned BitWidth : 31;
    unsigned IsUnsigned : 1;
    union {
      /// Used to store the <= 64 bits integer value.
      uint64_t VAL;

/// Used to store the >64 bits integer value.
      const uint64_t *pVal;
    };
    void *Type;
  };
  struct A {
    unsigned Kind;
    unsigned NumArgs;
    const TemplateArgument *Args;
  };
  struct TA {
    unsigned Kind;
    unsigned NumExpansions;
    void *Name;
  };
  struct TV {
    unsigned Kind;
    uintptr_t V;
  };
  union {
    struct DA DeclArg;
    struct I Integer;
    struct A Args;
    struct TA TemplateArg;
    struct TV TypeOrValue;
  };

public:
  /// Construct an empty, invalid template argument.
  constexpr TemplateArgument() : TypeOrValue({Null, 0}) {}

/// Construct a template type argument.
  TemplateArgument(QualType T, bool isNullPtr = false) {
    TypeOrValue.Kind = isNullPtr ? NullPtr : Type;
    TypeOrValue.V = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr());
  }

/// Construct a template argument that refers to a
  /// declaration, which is either an external declaration or a
  /// template declaration.
  TemplateArgument(ValueDecl *D, QualType QT) {
    assert(D && "Expected decl");
    DeclArg.Kind = Declaration;
    DeclArg.QT = QT.getAsOpaquePtr();
    DeclArg.D = D;
  }

/// Construct an integral constant template argument. The memory to
  /// store the value is allocated with Ctx.
  TemplateArgument(ASTContext &Ctx, const llvm::APSInt &Value, QualType Type);

/// Construct an integral constant template argument with the same
  /// value as Other but a different type.
  TemplateArgument(const TemplateArgument &Other, QualType Type) {
    Integer = Other.Integer;
    Integer.Type = Type.getAsOpaquePtr();
  }

/// Construct a template argument that is a template.
  ///
  /// This form of template argument is generally used for template template
  /// parameters. However, the template name could be a dependent template
  /// name that ends up being instantiated to a function template whose address
  /// is taken.
  ///
  /// \param Name The template name.
  TemplateArgument(TemplateName Name) {
    TemplateArg.Kind = Template;
    TemplateArg.Name = Name.getAsVoidPointer();
    TemplateArg.NumExpansions = 0;
  }

/// Construct a template argument that is a template pack expansion.
  ///
  /// This form of template argument is generally used for template template
  /// parameters. However, the template name could be a dependent template
  /// name that ends up being instantiated to a function template whose address
  /// is taken.
  ///
  /// \param Name The template name.
  ///
  /// \param NumExpansions The number of expansions that will be generated by
  /// instantiating
  TemplateArgument(TemplateName Name, Optional<unsigned> NumExpansions) {
    TemplateArg.Kind = TemplateExpansion;
    TemplateArg.Name = Name.getAsVoidPointer();
    if (NumExpansions)
      TemplateArg.NumExpansions = *NumExpansions + 1;
    else
      TemplateArg.NumExpansions = 0;
  }

/// Construct a template argument that is an expression.
  ///
  /// This form of template argument only occurs in template argument
  /// lists used for dependent types and for expression; it will not
  /// occur in a non-dependent, canonical template argument list.
  TemplateArgument(Expr *E) {
    TypeOrValue.Kind = Expression;
    TypeOrValue.V = reinterpret_cast<uintptr_t>(E);
  }

/// Construct a template argument that is a template argument pack.
  ///
  /// We assume that storage for the template arguments provided
  /// outlives the TemplateArgument itself.
  explicit TemplateArgument(ArrayRef<TemplateArgument> Args) {
    this->Args.Kind = Pack;
    this->Args.Args = Args.data();
    this->Args.NumArgs = Args.size();
  }

TemplateArgument(TemplateName, bool) = delete;

static TemplateArgument getEmptyPack() { return TemplateArgument(None); }

/// Create a new template argument pack by copying the given set of
  /// template arguments.
  static TemplateArgument CreatePackCopy(ASTContext &Context,
                                         ArrayRef<TemplateArgument> Args);

/// Return the kind of stored template argument.
  ArgKind getKind() const { return (ArgKind)TypeOrValue.Kind; }

/// Determine whether this template argument has no value.
  bool isNull() const { return getKind() == Null; }

TemplateArgumentDependence getDependence() const;

/// Whether this template argument is dependent on a template
  /// parameter such that its result can change from one instantiation to
  /// another.
  bool isDependent() const;

/// Whether this template argument is dependent on a template
  /// parameter.
  bool isInstantiationDependent() const;

/// Whether this template argument contains an unexpanded
  /// parameter pack.
  bool containsUnexpandedParameterPack() const;

/// Determine whether this template argument is a pack expansion.
  bool isPackExpansion() const;

/// Retrieve the type for a type template argument.
  QualType getAsType() const {
    assert(getKind() == Type && "Unexpected kind");
    return QualType::getFromOpaquePtr(reinterpret_cast<void*>(TypeOrValue.V));
  }

/// Retrieve the declaration for a declaration non-type
  /// template argument.
  ValueDecl *getAsDecl() const {
    assert(getKind() == Declaration && "Unexpected kind");
    return DeclArg.D;
  }

QualType getParamTypeForDecl() const {
    assert(getKind() == Declaration && "Unexpected kind");
    return QualType::getFromOpaquePtr(DeclArg.QT);
  }

/// Retrieve the type for null non-type template argument.
  QualType getNullPtrType() const {
    assert(getKind() == NullPtr && "Unexpected kind");
    return QualType::getFromOpaquePtr(reinterpret_cast<void*>(TypeOrValue.V));
  }

/// Retrieve the template name for a template name argument.
  TemplateName getAsTemplate() const {
    assert(getKind() == Template && "Unexpected kind");
    return TemplateName::getFromVoidPointer(TemplateArg.Name);
  }

/// Retrieve the template argument as a template name; if the argument
  /// is a pack expansion, return the pattern as a template name.
  TemplateName getAsTemplateOrTemplatePattern() const {
    assert((getKind() == Template || getKind() == TemplateExpansion) &&
           "Unexpected kind");

return TemplateName::getFromVoidPointer(TemplateArg.Name);
  }

/// Retrieve the number of expansions that a template template argument
  /// expansion will produce, if known.
  Optional<unsigned> getNumTemplateExpansions() const;

/// Retrieve the template argument as an integral value.
  // FIXME: Provide a way to read the integral data without copying the value.
  llvm::APSInt getAsIntegral() const {
    assert(getKind() == Integral && "Unexpected kind");

using namespace llvm;

if (Integer.BitWidth <= 64)
      return APSInt(APInt(Integer.BitWidth, Integer.VAL), Integer.IsUnsigned);

unsigned NumWords = APInt::getNumWords(Integer.BitWidth);
    return APSInt(APInt(Integer.BitWidth, makeArrayRef(Integer.pVal, NumWords)),
                  Integer.IsUnsigned);
  }

/// Retrieve the type of the integral value.
  QualType getIntegralType() const {
    assert(getKind() == Integral && "Unexpected kind");
    return QualType::getFromOpaquePtr(Integer.Type);
  }

void setIntegralType(QualType T) {
    assert(getKind() == Integral && "Unexpected kind");
    Integer.Type = T.getAsOpaquePtr();
  }

/// If this is a non-type template argument, get its type. Otherwise,
  /// returns a null QualType.
  QualType getNonTypeTemplateArgumentType() const;

/// Retrieve the template argument as an expression.
  Expr *getAsExpr() const {
    assert(getKind() == Expression && "Unexpected kind");
    return reinterpret_cast<Expr *>(TypeOrValue.V);
  }

/// Iterator that traverses the elements of a template argument pack.
  using pack_iterator = const TemplateArgument *;

/// Iterator referencing the first argument of a template argument
  /// pack.
  pack_iterator pack_begin() const {
    assert(getKind() == Pack);
    return Args.Args;
  }

/// Iterator referencing one past the last argument of a template
  /// argument pack.
  pack_iterator pack_end() const {
    assert(getKind() == Pack);
    return Args.Args + Args.NumArgs;
  }

/// Iterator range referencing all of the elements of a template
  /// argument pack.
  ArrayRef<TemplateArgument> pack_elements() const {
    return llvm::makeArrayRef(pack_begin(), pack_end());
  }

/// The number of template arguments in the given template argument
  /// pack.
  unsigned pack_size() const {
    assert(getKind() == Pack);
    return Args.NumArgs;
  }

/// Return the array of arguments in this template argument pack.
  ArrayRef<TemplateArgument> getPackAsArray() const {
    assert(getKind() == Pack);
    return llvm::makeArrayRef(Args.Args, Args.NumArgs);
  }

/// Determines whether two template arguments are superficially the
  /// same.
  bool structurallyEquals(const TemplateArgument &Other) const;

/// When the template argument is a pack expansion, returns
  /// the pattern of the pack expansion.
  TemplateArgument getPackExpansionPattern() const;

/// Print this template argument to the given output stream.
  void print(const PrintingPolicy &Policy, raw_ostream &Out) const;

/// Debugging aid that dumps the template argument.
  void dump(raw_ostream &Out) const;

/// Debugging aid that dumps the template argument to standard error.
  void dump() const;

/// Used to insert TemplateArguments into FoldingSets.
  void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) const;
};

/// Location information for a TemplateArgument.
struct TemplateArgumentLocInfo {
private:
  struct T {
    // FIXME: We'd like to just use the qualifier in the TemplateName,
    // but template arguments get canonicalized too quickly.
    NestedNameSpecifier *Qualifier;
    void *QualifierLocData;
    unsigned TemplateNameLoc;
    unsigned EllipsisLoc;
  };

union {
    struct T Template;
    Expr *Expression;
    TypeSourceInfo *Declarator;
  };

public:
  constexpr TemplateArgumentLocInfo() : Template({nullptr, nullptr, 0, 0}) {}

TemplateArgumentLocInfo(TypeSourceInfo *TInfo) : Declarator(TInfo) {}

TemplateArgumentLocInfo(Expr *E) : Expression(E) {}

TemplateArgumentLocInfo(NestedNameSpecifierLoc QualifierLoc,
                          SourceLocation TemplateNameLoc,
                          SourceLocation EllipsisLoc) {
    Template.Qualifier = QualifierLoc.getNestedNameSpecifier();
    Template.QualifierLocData = QualifierLoc.getOpaqueData();
    Template.TemplateNameLoc = TemplateNameLoc.getRawEncoding();
    Template.EllipsisLoc = EllipsisLoc.getRawEncoding();
  }

TypeSourceInfo *getAsTypeSourceInfo() const {
    return Declarator;
  }

Expr *getAsExpr() const {
    return Expression;
  }

NestedNameSpecifierLoc getTemplateQualifierLoc() const {
    return NestedNameSpecifierLoc(Template.Qualifier,
                                  Template.QualifierLocData);
  }

SourceLocation getTemplateNameLoc() const {
    return SourceLocation::getFromRawEncoding(Template.TemplateNameLoc);
  }

SourceLocation getTemplateEllipsisLoc() const {
    return SourceLocation::getFromRawEncoding(Template.EllipsisLoc);
  }
};

/// Location wrapper for a TemplateArgument.  TemplateArgument is to
/// TemplateArgumentLoc as Type is to TypeLoc.
class TemplateArgumentLoc {
  TemplateArgument Argument;
  TemplateArgumentLocInfo LocInfo;

public:
  constexpr TemplateArgumentLoc() {}

TemplateArgumentLoc(const TemplateArgument &Argument,
                      TemplateArgumentLocInfo Opaque)
      : Argument(Argument), LocInfo(Opaque) {}

TemplateArgumentLoc(const TemplateArgument &Argument, TypeSourceInfo *TInfo)
      : Argument(Argument), LocInfo(TInfo) {
    assert(Argument.getKind() == TemplateArgument::Type);
  }

TemplateArgumentLoc(const TemplateArgument &Argument, Expr *E)
      : Argument(Argument), LocInfo(E) {

// Permit any kind of template argument that can be represented with an
    // expression.
    assert(Argument.getKind() == TemplateArgument::NullPtr ||
           Argument.getKind() == TemplateArgument::Integral ||
           Argument.getKind() == TemplateArgument::Declaration ||
           Argument.getKind() == TemplateArgument::Expression);
  }

TemplateArgumentLoc(const TemplateArgument &Argument,
                      NestedNameSpecifierLoc QualifierLoc,
                      SourceLocation TemplateNameLoc,
                      SourceLocation EllipsisLoc = SourceLocation())
      : Argument(Argument),
        LocInfo(QualifierLoc, TemplateNameLoc, EllipsisLoc) {
    assert(Argument.getKind() == TemplateArgument::Template ||
           Argument.getKind() == TemplateArgument::TemplateExpansion);
  }

/// - Fetches the primary location of the argument.
  SourceLocation getLocation() const {
    if (Argument.getKind() == TemplateArgument::Template ||
        Argument.getKind() == TemplateArgument::TemplateExpansion)
      return getTemplateNameLoc();

return getSourceRange().getBegin();
  }

/// - Fetches the full source range of the argument.
  SourceRange getSourceRange() const LLVM_READONLY;

const TemplateArgument &getArgument() const {
    return Argument;
  }

TemplateArgumentLocInfo getLocInfo() const {
    return LocInfo;
  }

TypeSourceInfo *getTypeSourceInfo() const {
    assert(Argument.getKind() == TemplateArgument::Type);
    return LocInfo.getAsTypeSourceInfo();
  }

Expr *getSourceExpression() const {
    assert(Argument.getKind() == TemplateArgument::Expression);
    return LocInfo.getAsExpr();
  }

Expr *getSourceDeclExpression() const {
    assert(Argument.getKind() == TemplateArgument::Declaration);
    return LocInfo.getAsExpr();
  }

Expr *getSourceNullPtrExpression() const {
    assert(Argument.getKind() == TemplateArgument::NullPtr);
    return LocInfo.getAsExpr();
  }

Expr *getSourceIntegralExpression() const {
    assert(Argument.getKind() == TemplateArgument::Integral);
    return LocInfo.getAsExpr();
  }

NestedNameSpecifierLoc getTemplateQualifierLoc() const {
    if (Argument.getKind() != TemplateArgument::Template &&
        Argument.getKind() != TemplateArgument::TemplateExpansion)
      return NestedNameSpecifierLoc();
    return LocInfo.getTemplateQualifierLoc();
  }

SourceLocation getTemplateNameLoc() const {
    if (Argument.getKind() != TemplateArgument::Template &&
        Argument.getKind() != TemplateArgument::TemplateExpansion)
      return SourceLocation();
    return LocInfo.getTemplateNameLoc();
  }

SourceLocation getTemplateEllipsisLoc() const {
    if (Argument.getKind() != TemplateArgument::TemplateExpansion)
      return SourceLocation();
    return LocInfo.getTemplateEllipsisLoc();
  }
};

/// A convenient class for passing around template argument
/// information.  Designed to be passed by reference.
class TemplateArgumentListInfo {
  SmallVector<TemplateArgumentLoc, 8> Arguments;
  SourceLocation LAngleLoc;
  SourceLocation RAngleLoc;

public:
  TemplateArgumentListInfo() = default;

TemplateArgumentListInfo(SourceLocation LAngleLoc,
                           SourceLocation RAngleLoc)
      : LAngleLoc(LAngleLoc), RAngleLoc(RAngleLoc) {}

// This can leak if used in an AST node, use ASTTemplateArgumentListInfo
  // instead.
  void *operator new(size_t bytes, ASTContext &C) = delete;

SourceLocation getLAngleLoc() const { return LAngleLoc; }
  SourceLocation getRAngleLoc() const { return RAngleLoc; }

void setLAngleLoc(SourceLocation Loc) { LAngleLoc = Loc; }
  void setRAngleLoc(SourceLocation Loc) { RAngleLoc = Loc; }

unsigned size() const { return Arguments.size(); }

const TemplateArgumentLoc *getArgumentArray() const {
    return Arguments.data();
  }

llvm::ArrayRef<TemplateArgumentLoc> arguments() const {
    return Arguments;
  }

const TemplateArgumentLoc &operator[](unsigned I) const {
    return Arguments[I];
  }

TemplateArgumentLoc &operator[](unsigned I) {
    return Arguments[I];
  }

void addArgument(const TemplateArgumentLoc &Loc) {
    Arguments.push_back(Loc);
  }
};

/// Represents an explicit template argument list in C++, e.g.,
/// the "<int>" in "sort<int>".
/// This is safe to be used inside an AST node, in contrast with
/// TemplateArgumentListInfo.
struct ASTTemplateArgumentListInfo final
    : private llvm::TrailingObjects<ASTTemplateArgumentListInfo,
                                    TemplateArgumentLoc> {
private:
  friend class ASTNodeImporter;
  friend TrailingObjects;

ASTTemplateArgumentListInfo(const TemplateArgumentListInfo &List);

public:
  /// The source location of the left angle bracket ('<').
  SourceLocation LAngleLoc;

/// The source location of the right angle bracket ('>').
  SourceLocation RAngleLoc;

/// The number of template arguments in TemplateArgs.
  unsigned NumTemplateArgs;

SourceLocation getLAngleLoc() const { return LAngleLoc; }
  SourceLocation getRAngleLoc() const { return RAngleLoc; }

/// Retrieve the template arguments
  const TemplateArgumentLoc *getTemplateArgs() const {
    return getTrailingObjects<TemplateArgumentLoc>();
  }
  unsigned getNumTemplateArgs() const { return NumTemplateArgs; }

llvm::ArrayRef<TemplateArgumentLoc> arguments() const {
    return llvm::makeArrayRef(getTemplateArgs(), getNumTemplateArgs());
  }

const TemplateArgumentLoc &operator[](unsigned I) const {
    return getTemplateArgs()[I];
  }

static const ASTTemplateArgumentListInfo *
  Create(const ASTContext &C, const TemplateArgumentListInfo &List);
};

/// Represents an explicit template argument list in C++, e.g.,
/// the "<int>" in "sort<int>".
///
/// It is intended to be used as a trailing object on AST nodes, and
/// as such, doesn't contain the array of TemplateArgumentLoc itself,
/// but expects the containing object to also provide storage for
/// that.
struct alignas(void *) ASTTemplateKWAndArgsInfo {
  /// The source location of the left angle bracket ('<').
  SourceLocation LAngleLoc;

/// The source location of the right angle bracket ('>').
  SourceLocation RAngleLoc;

/// The source location of the template keyword; this is used
  /// as part of the representation of qualified identifiers, such as
  /// S<T>::template apply<T>.  Will be empty if this expression does
  /// not have a template keyword.
  SourceLocation TemplateKWLoc;

/// The number of template arguments in TemplateArgs.
  unsigned NumTemplateArgs;

void initializeFrom(SourceLocation TemplateKWLoc,
                      const TemplateArgumentListInfo &List,
                      TemplateArgumentLoc *OutArgArray);
  // FIXME: The parameter Deps is the result populated by this method, the
  // caller doesn't need it since it is populated by computeDependence. remove
  // it.
  void initializeFrom(SourceLocation TemplateKWLoc,
                      const TemplateArgumentListInfo &List,
                      TemplateArgumentLoc *OutArgArray,
                      TemplateArgumentDependence &Deps);
  void initializeFrom(SourceLocation TemplateKWLoc);

void copyInto(const TemplateArgumentLoc *ArgArray,
                TemplateArgumentListInfo &List) const;
};

const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB,
                                    const TemplateArgument &Arg);

inline TemplateSpecializationType::iterator
    TemplateSpecializationType::end() const {
  return getArgs() + getNumArgs();
}

inline DependentTemplateSpecializationType::iterator
    DependentTemplateSpecializationType::end() const {
  return getArgs() + getNumArgs();
}

inline const TemplateArgument &
    TemplateSpecializationType::getArg(unsigned Idx) const {
  assert(Idx < getNumArgs() && "Template argument out of range");
  return getArgs()[Idx];
}

inline const TemplateArgument &
    DependentTemplateSpecializationType::getArg(unsigned Idx) const {
  assert(Idx < getNumArgs() && "Template argument out of range");
  return getArgs()[Idx];
}

inline const TemplateArgument &AutoType::getArg(unsigned Idx) const {
  assert(Idx < getNumArgs() && "Template argument out of range");
  return getArgs()[Idx];
}

} // namespace clang

#endif // LLVM_CLANG_AST_TEMPLATEBASE_H

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