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+//===--- Template.h - Template Parsing Data Types -------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides data structures that store the parsed representation of
+// templates.
+//
+//===----------------------------------------------------------------------===//
+#ifndef LLVM_CLANG_PARSE_TEMPLATE_H
+#define LLVM_CLANG_PARSE_TEMPLATE_H
+
+#include "clang/Parse/DeclSpec.h"
+#include "clang/Parse/Ownership.h"
+#include <cassert>
+
+namespace clang {
+ /// \brief Represents the parsed form of a C++ template argument.
+ class ParsedTemplateArgument {
+ public:
+ /// \brief Describes the kind of template argument that was parsed.
+ enum KindType {
+ /// \brief A template type parameter, stored as a type.
+ Type,
+ /// \brief A non-type template parameter, stored as an expression.
+ NonType,
+ /// \brief A template template argument, stored as a template name.
+ Template
+ };
+
+ /// \brief Build an empty template argument. This template argument
+ ParsedTemplateArgument() : Kind(Type), Arg(0) { }
+
+ /// \brief Create a template type argument or non-type template argument.
+ ///
+ /// \param Arg the template type argument or non-type template argument.
+ /// \param Loc the location of the type.
+ ParsedTemplateArgument(KindType Kind, void *Arg, SourceLocation Loc)
+ : Kind(Kind), Arg(Arg), Loc(Loc) { }
+
+ /// \brief Create a template template argument.
+ ///
+ /// \param SS the C++ scope specifier that precedes the template name, if
+ /// any.
+ ///
+ /// \param Template the template to which this template template
+ /// argument refers.
+ ///
+ /// \param TemplateLoc the location of the template name.
+ ParsedTemplateArgument(const CXXScopeSpec &SS,
+ ActionBase::TemplateTy Template,
+ SourceLocation TemplateLoc)
+ : Kind(ParsedTemplateArgument::Template), Arg(Template.get()),
+ Loc(TemplateLoc), SS(SS) { }
+
+ /// \brief Determine whether the given template argument is invalid.
+ bool isInvalid() { return Arg == 0; }
+
+ /// \brief Determine what kind of template argument we have.
+ KindType getKind() const { return Kind; }
+
+ /// \brief Retrieve the template type argument's type.
+ ActionBase::TypeTy *getAsType() const {
+ assert(Kind == Type && "Not a template type argument");
+ return Arg;
+ }
+
+ /// \brief Retrieve the non-type template argument's expression.
+ ActionBase::ExprTy *getAsExpr() const {
+ assert(Kind == NonType && "Not a non-type template argument");
+ return Arg;
+ }
+
+ /// \brief Retrieve the template template argument's template name.
+ ActionBase::TemplateTy getAsTemplate() const {
+ assert(Kind == Template && "Not a template template argument");
+ return ActionBase::TemplateTy::make(Arg);
+ }
+
+ /// \brief Retrieve the location of the template argument.
+ SourceLocation getLocation() const { return Loc; }
+
+ /// \brief Retrieve the nested-name-specifier that precedes the template
+ /// name in a template template argument.
+ const CXXScopeSpec &getScopeSpec() const {
+ assert(Kind == Template &&
+ "Only template template arguments can have a scope specifier");
+ return SS;
+ }
+
+ private:
+ KindType Kind;
+
+ /// \brief The actual template argument representation, which may be
+ /// an \c ActionBase::TypeTy* (for a type), an ActionBase::ExprTy* (for an
+ /// expression), or an ActionBase::TemplateTy (for a template).
+ void *Arg;
+
+ /// \brief the location of the template argument.
+ SourceLocation Loc;
+
+ /// \brief The nested-name-specifier that can accompany a template template
+ /// argument.
+ CXXScopeSpec SS;
+ };
+
+ /// \brief Information about a template-id annotation
+ /// token.
+ ///
+ /// A template-id annotation token contains the template declaration,
+ /// template arguments, whether those template arguments were types,
+ /// expressions, or template names, and the source locations for important
+ /// tokens. All of the information about template arguments is allocated
+ /// directly after this structure.
+ struct TemplateIdAnnotation {
+ /// TemplateNameLoc - The location of the template name within the
+ /// source.
+ SourceLocation TemplateNameLoc;
+
+ /// FIXME: Temporarily stores the name of a specialization
+ IdentifierInfo *Name;
+
+ /// FIXME: Temporarily stores the overloaded operator kind.
+ OverloadedOperatorKind Operator;
+
+ /// The declaration of the template corresponding to the
+ /// template-name. This is an Action::TemplateTy.
+ void *Template;
+
+ /// The kind of template that Template refers to.
+ TemplateNameKind Kind;
+
+ /// The location of the '<' before the template argument
+ /// list.
+ SourceLocation LAngleLoc;
+
+ /// The location of the '>' after the template argument
+ /// list.
+ SourceLocation RAngleLoc;
+
+ /// NumArgs - The number of template arguments.
+ unsigned NumArgs;
+
+ /// \brief Retrieves a pointer to the template arguments
+ ParsedTemplateArgument *getTemplateArgs() {
+ return reinterpret_cast<ParsedTemplateArgument *>(this + 1);
+ }
+
+ static TemplateIdAnnotation* Allocate(unsigned NumArgs) {
+ TemplateIdAnnotation *TemplateId
+ = (TemplateIdAnnotation *)std::malloc(sizeof(TemplateIdAnnotation) +
+ sizeof(ParsedTemplateArgument) * NumArgs);
+ TemplateId->NumArgs = NumArgs;
+ return TemplateId;
+ }
+
+ void Destroy() { free(this); }
+ };
+
+#if !defined(DISABLE_SMART_POINTERS)
+ inline void ASTTemplateArgsPtr::destroy() {
+ if (!Count)
+ return;
+
+ for (unsigned I = 0; I != Count; ++I)
+ if (Args[I].getKind() == ParsedTemplateArgument::NonType)
+ Actions.DeleteExpr(Args[I].getAsExpr());
+
+ Count = 0;
+ }
+#endif
+
+ inline const ParsedTemplateArgument &
+ ASTTemplateArgsPtr::operator[](unsigned Arg) const {
+ return Args[Arg];
+ }
+}
+
+#endif
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