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diff --git a/clang-r353983/include/clang/Lex/PreprocessorOptions.h b/clang-r353983/include/clang/Lex/PreprocessorOptions.h
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+//===- PreprocessorOptions.h ------------------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_LEX_PREPROCESSOROPTIONS_H_
+#define LLVM_CLANG_LEX_PREPROCESSOROPTIONS_H_
+
+#include "clang/Basic/LLVM.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSet.h"
+#include <memory>
+#include <set>
+#include <string>
+#include <utility>
+#include <vector>
+
+namespace llvm {
+
+class MemoryBuffer;
+
+} // namespace llvm
+
+namespace clang {
+
+/// Enumerate the kinds of standard library that
+enum ObjCXXARCStandardLibraryKind {
+  ARCXX_nolib,
+
+  /// libc++
+  ARCXX_libcxx,
+
+  /// libstdc++
+  ARCXX_libstdcxx
+};
+
+/// PreprocessorOptions - This class is used for passing the various options
+/// used in preprocessor initialization to InitializePreprocessor().
+class PreprocessorOptions {
+public:
+  std::vector<std::pair<std::string, bool/*isUndef*/>> Macros;
+  std::vector<std::string> Includes;
+  std::vector<std::string> MacroIncludes;
+
+  /// Initialize the preprocessor with the compiler and target specific
+  /// predefines.
+  bool UsePredefines = true;
+
+  /// Whether we should maintain a detailed record of all macro
+  /// definitions and expansions.
+  bool DetailedRecord = false;
+
+  /// When true, we are creating or using a PCH where a #pragma hdrstop is
+  /// expected to indicate the beginning or end of the PCH.
+  bool PCHWithHdrStop = false;
+
+  /// When true, we are creating a PCH or creating the PCH object while
+  /// expecting a #pragma hdrstop to separate the two.  Allow for a
+  /// missing #pragma hdrstop, which generates a PCH for the whole file,
+  /// and creates an empty PCH object.
+  bool PCHWithHdrStopCreate = false;
+
+  /// If non-empty, the filename used in an #include directive in the primary
+  /// source file (or command-line preinclude) that is used to implement
+  /// MSVC-style precompiled headers. When creating a PCH, after the #include
+  /// of this header, the PCH generation stops. When using a PCH, tokens are
+  /// skipped until after an #include of this header is seen.
+  std::string PCHThroughHeader;
+
+  /// The implicit PCH included at the start of the translation unit, or empty.
+  std::string ImplicitPCHInclude;
+
+  /// Headers that will be converted to chained PCHs in memory.
+  std::vector<std::string> ChainedIncludes;
+
+  /// When true, disables most of the normal validation performed on
+  /// precompiled headers.
+  bool DisablePCHValidation = false;
+
+  /// When true, a PCH with compiler errors will not be rejected.
+  bool AllowPCHWithCompilerErrors = false;
+
+  /// Dump declarations that are deserialized from PCH, for testing.
+  bool DumpDeserializedPCHDecls = false;
+
+  /// This is a set of names for decls that we do not want to be
+  /// deserialized, and we emit an error if they are; for testing purposes.
+  std::set<std::string> DeserializedPCHDeclsToErrorOn;
+
+  /// If non-zero, the implicit PCH include is actually a precompiled
+  /// preamble that covers this number of bytes in the main source file.
+  ///
+  /// The boolean indicates whether the preamble ends at the start of a new
+  /// line.
+  std::pair<unsigned, bool> PrecompiledPreambleBytes;
+
+  /// True indicates that a preamble is being generated.
+  ///
+  /// When the lexer is done, one of the things that need to be preserved is the
+  /// conditional #if stack, so the ASTWriter/ASTReader can save/restore it when
+  /// processing the rest of the file.
+  bool GeneratePreamble = false;
+
+  /// Whether to write comment locations into the PCH when building it.
+  /// Reading the comments from the PCH can be a performance hit even if the
+  /// clients don't use them.
+  bool WriteCommentListToPCH = true;
+
+  /// When enabled, preprocessor is in a mode for parsing a single file only.
+  ///
+  /// Disables #includes of other files and if there are unresolved identifiers
+  /// in preprocessor directive conditions it causes all blocks to be parsed so
+  /// that the client can get the maximum amount of information from the parser.
+  bool SingleFileParseMode = false;
+
+  /// When enabled, the preprocessor will construct editor placeholder tokens.
+  bool LexEditorPlaceholders = true;
+
+  /// True if the SourceManager should report the original file name for
+  /// contents of files that were remapped to other files. Defaults to true.
+  bool RemappedFilesKeepOriginalName = true;
+
+  /// The set of file remappings, which take existing files on
+  /// the system (the first part of each pair) and gives them the
+  /// contents of other files on the system (the second part of each
+  /// pair).
+  std::vector<std::pair<std::string, std::string>> RemappedFiles;
+
+  /// The set of file-to-buffer remappings, which take existing files
+  /// on the system (the first part of each pair) and gives them the contents
+  /// of the specified memory buffer (the second part of each pair).
+  std::vector<std::pair<std::string, llvm::MemoryBuffer *>> RemappedFileBuffers;
+
+  /// Whether the compiler instance should retain (i.e., not free)
+  /// the buffers associated with remapped files.
+  ///
+  /// This flag defaults to false; it can be set true only through direct
+  /// manipulation of the compiler invocation object, in cases where the
+  /// compiler invocation and its buffers will be reused.
+  bool RetainRemappedFileBuffers = false;
+
+  /// The Objective-C++ ARC standard library that we should support,
+  /// by providing appropriate definitions to retrofit the standard library
+  /// with support for lifetime-qualified pointers.
+  ObjCXXARCStandardLibraryKind ObjCXXARCStandardLibrary = ARCXX_nolib;
+
+  /// Records the set of modules
+  class FailedModulesSet {
+    llvm::StringSet<> Failed;
+
+  public:
+    bool hasAlreadyFailed(StringRef module) {
+      return Failed.count(module) > 0;
+    }
+
+    void addFailed(StringRef module) {
+      Failed.insert(module);
+    }
+  };
+
+  /// The set of modules that failed to build.
+  ///
+  /// This pointer will be shared among all of the compiler instances created
+  /// to (re)build modules, so that once a module fails to build anywhere,
+  /// other instances will see that the module has failed and won't try to
+  /// build it again.
+  std::shared_ptr<FailedModulesSet> FailedModules;
+
+public:
+  PreprocessorOptions() : PrecompiledPreambleBytes(0, false) {}
+
+  void addMacroDef(StringRef Name) { Macros.emplace_back(Name, false); }
+  void addMacroUndef(StringRef Name) { Macros.emplace_back(Name, true); }
+
+  void addRemappedFile(StringRef From, StringRef To) {
+    RemappedFiles.emplace_back(From, To);
+  }
+
+  void addRemappedFile(StringRef From, llvm::MemoryBuffer *To) {
+    RemappedFileBuffers.emplace_back(From, To);
+  }
+
+  void clearRemappedFiles() {
+    RemappedFiles.clear();
+    RemappedFileBuffers.clear();
+  }
+
+  /// Reset any options that are not considered when building a
+  /// module.
+  void resetNonModularOptions() {
+    Includes.clear();
+    MacroIncludes.clear();
+    ChainedIncludes.clear();
+    DumpDeserializedPCHDecls = false;
+    ImplicitPCHInclude.clear();
+    SingleFileParseMode = false;
+    LexEditorPlaceholders = true;
+    RetainRemappedFileBuffers = true;
+    PrecompiledPreambleBytes.first = 0;
+    PrecompiledPreambleBytes.second = false;
+  }
+};
+
+} // namespace clang
+
+#endif // LLVM_CLANG_LEX_PREPROCESSOROPTIONS_H_