llvm/clang/include/clang/Lex/HeaderMap.h

//===--- HeaderMap.h - A file that acts like dir of symlinks ----*- 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 HeaderMap interface.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_LEX_HEADERMAP_H
#define LLVM_CLANG_LEX_HEADERMAP_H

#include "clang/Basic/FileManager.h"
#include "clang/Basic/LLVM.h"
#include "clang/Lex/HeaderMapTypes.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/MemoryBuffer.h"
#include <memory>
#include <optional>

namespace clang {

struct HMapBucket;
struct HMapHeader;

/// Implementation for \a HeaderMap that doesn't depend on \a FileManager.
class HeaderMapImpl { … };

/// This class represents an Apple concept known as a 'header map'.  To the
/// \#include file resolution process, it basically acts like a directory of
/// symlinks to files.  Its advantages are that it is dense and more efficient
/// to create and process than a directory of symlinks.
class HeaderMap : private HeaderMapImpl { … };

} // end namespace clang.

#endif