llvm/clang/include/clang/AST/ASTImporter.h

//===- ASTImporter.h - Importing ASTs from other Contexts -------*- 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 ASTImporter class which imports AST nodes from one
//  context into another context.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_AST_ASTIMPORTER_H
#define LLVM_CLANG_AST_ASTIMPORTER_H

#include "clang/AST/ASTImportError.h"
#include "clang/AST/DeclBase.h"
#include "clang/AST/DeclarationName.h"
#include "clang/AST/ExprCXX.h"
#include "clang/AST/NestedNameSpecifier.h"
#include "clang/AST/TemplateName.h"
#include "clang/AST/Type.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/IdentifierTable.h"
#include "clang/Basic/LLVM.h"
#include "clang/Basic/SourceLocation.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/SmallVector.h"
#include <optional>
#include <utility>

namespace clang {

class ASTContext;
class ASTImporterSharedState;
class Attr;
class CXXBaseSpecifier;
class CXXCtorInitializer;
class Decl;
class DeclContext;
class Expr;
class FileManager;
class NamedDecl;
class Stmt;
class TagDecl;
class TranslationUnitDecl;
class TypeSourceInfo;

  // \brief Returns with a list of declarations started from the canonical decl
  // then followed by subsequent decls in the translation unit.
  // This gives a canonical list for each entry in the redecl chain.
  // `Decl::redecls()` gives a list of decls which always start from the
  // previous decl and the next item is actually the previous item in the order
  // of source locations.  Thus, `Decl::redecls()` gives different lists for
  // the different entries in a given redecl chain.
  llvm::SmallVector<Decl*, 2> getCanonicalForwardRedeclChain(Decl* D);

  /// Imports selected nodes from one AST context into another context,
  /// merging AST nodes where appropriate.
  class ASTImporter { … };

} // namespace clang

#endif // LLVM_CLANG_AST_ASTIMPORTER_H