llvm/clang-tools-extra/clangd/index/CanonicalIncludes.h

//===-- CanonicalIncludes.h - remap #include header -------------*- 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
//
//===----------------------------------------------------------------------===//
//
// At indexing time, we decide which file to #included for a symbol.
// Usually this is the file with the canonical decl, but there are exceptions:
// - private headers may have pragmas pointing to the matching public header.
//   (These are "IWYU" pragmas, named after the include-what-you-use tool).
// - the standard library is implemented in many files, without any pragmas.
//   We have a lookup table for common standard library implementations.
//   libstdc++ puts char_traits in bits/char_traits.h, but we #include <string>.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_INDEX_CANONICALINCLUDES_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANGD_INDEX_CANONICALINCLUDES_H

#include "clang/Basic/FileEntry.h"
#include "clang/Basic/LangOptions.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"

namespace clang {
namespace clangd {

/// Maps a definition location onto an #include file, based on a set of filename
/// rules.
/// Only const methods (i.e. mapHeader) in this class are thread safe.
class CanonicalIncludes { … };
} // namespace clangd
} // namespace clang

#endif // LLVM_CLANG_TOOLS_EXTRA_CLANGD_INDEX_CANONICALINCLUDES_H