llvm/clang/include/clang/AST/NestedNameSpecifier.h

//===- NestedNameSpecifier.h - C++ nested name specifiers -------*- 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 defines the NestedNameSpecifier class, which represents
//  a C++ nested-name-specifier.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_AST_NESTEDNAMESPECIFIER_H
#define LLVM_CLANG_AST_NESTEDNAMESPECIFIER_H

#include "clang/AST/DependenceFlags.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/SourceLocation.h"
#include "llvm/ADT/DenseMapInfo.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/PointerIntPair.h"
#include "llvm/Support/Compiler.h"
#include <cstdint>
#include <cstdlib>
#include <utility>

namespace clang {

class ASTContext;
class CXXRecordDecl;
class IdentifierInfo;
class LangOptions;
class NamespaceAliasDecl;
class NamespaceDecl;
struct PrintingPolicy;
class Type;
class TypeLoc;

/// Represents a C++ nested name specifier, such as
/// "\::std::vector<int>::".
///
/// C++ nested name specifiers are the prefixes to qualified
/// names. For example, "foo::" in "foo::x" is a nested name
/// specifier. Nested name specifiers are made up of a sequence of
/// specifiers, each of which can be a namespace, type, identifier
/// (for dependent names), decltype specifier, or the global specifier ('::').
/// The last two specifiers can only appear at the start of a
/// nested-namespace-specifier.
class NestedNameSpecifier : public llvm::FoldingSetNode { … };

/// A C++ nested-name-specifier augmented with source location
/// information.
class NestedNameSpecifierLoc { … };

/// Class that aids in the construction of nested-name-specifiers along
/// with source-location information for all of the components of the
/// nested-name-specifier.
class NestedNameSpecifierLocBuilder { … };

/// Insertion operator for diagnostics.  This allows sending
/// NestedNameSpecifiers into a diagnostic with <<.
inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &DB,
                                             NestedNameSpecifier *NNS) { … }

} // namespace clang

namespace llvm {

template <> struct DenseMapInfo<clang::NestedNameSpecifierLoc> { … };
} // namespace llvm

#endif // LLVM_CLANG_AST_NESTEDNAMESPECIFIER_H