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diff --git a/include/clang/Tooling/JSONCompilationDatabase.h b/include/clang/Tooling/JSONCompilationDatabase.h
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--- a/include/clang/Tooling/JSONCompilationDatabase.h
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-//===--- JSONCompilationDatabase.h - ----------------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-//  The JSONCompilationDatabase finds compilation databases supplied as a file
-//  'compile_commands.json'.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_CLANG_TOOLING_JSONCOMPILATIONDATABASE_H
-#define LLVM_CLANG_TOOLING_JSONCOMPILATIONDATABASE_H
-
-#include "clang/Basic/LLVM.h"
-#include "clang/Tooling/CompilationDatabase.h"
-#include "clang/Tooling/FileMatchTrie.h"
-#include "llvm/ADT/StringMap.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/SourceMgr.h"
-#include "llvm/Support/YAMLParser.h"
-#include <memory>
-#include <string>
-#include <vector>
-
-namespace clang {
-namespace tooling {
-
-/// \brief A JSON based compilation database.
-///
-/// JSON compilation database files must contain a list of JSON objects which
-/// provide the command lines in the attributes 'directory', 'command',
-/// 'arguments' and 'file':
-/// [
-///   { "directory": "<working directory of the compile>",
-///     "command": "<compile command line>",
-///     "file": "<path to source file>"
-///   },
-///   { "directory": "<working directory of the compile>",
-///     "arguments": ["<raw>", "<command>" "<line>" "<parameters>"],
-///     "file": "<path to source file>"
-///   },
-///   ...
-/// ]
-/// Each object entry defines one compile action. The specified file is
-/// considered to be the main source file for the translation unit.
-///
-/// 'command' is a full command line that will be unescaped.
-///
-/// 'arguments' is a list of command line arguments that will not be unescaped.
-///
-/// JSON compilation databases can for example be generated in CMake projects
-/// by setting the flag -DCMAKE_EXPORT_COMPILE_COMMANDS.
-class JSONCompilationDatabase : public CompilationDatabase {
-public:
-  /// \brief Loads a JSON compilation database from the specified file.
-  ///
-  /// Returns NULL and sets ErrorMessage if the database could not be
-  /// loaded from the given file.
-  static std::unique_ptr<JSONCompilationDatabase>
-  loadFromFile(StringRef FilePath, std::string &ErrorMessage);
-
-  /// \brief Loads a JSON compilation database from a data buffer.
-  ///
-  /// Returns NULL and sets ErrorMessage if the database could not be loaded.
-  static std::unique_ptr<JSONCompilationDatabase>
-  loadFromBuffer(StringRef DatabaseString, std::string &ErrorMessage);
-
-  /// \brief Returns all compile comamnds in which the specified file was
-  /// compiled.
-  ///
-  /// FIXME: Currently FilePath must be an absolute path inside the
-  /// source directory which does not have symlinks resolved.
-  std::vector<CompileCommand>
-  getCompileCommands(StringRef FilePath) const override;
-
-  /// \brief Returns the list of all files available in the compilation database.
-  ///
-  /// These are the 'file' entries of the JSON objects.
-  std::vector<std::string> getAllFiles() const override;
-
-  /// \brief Returns all compile commands for all the files in the compilation
-  /// database.
-  std::vector<CompileCommand> getAllCompileCommands() const override;
-
-private:
-  /// \brief Constructs a JSON compilation database on a memory buffer.
-  JSONCompilationDatabase(std::unique_ptr<llvm::MemoryBuffer> Database)
-      : Database(std::move(Database)),
-        YAMLStream(this->Database->getBuffer(), SM) {}
-
-  /// \brief Parses the database file and creates the index.
-  ///
-  /// Returns whether parsing succeeded. Sets ErrorMessage if parsing
-  /// failed.
-  bool parse(std::string &ErrorMessage);
-
-  // Tuple (directory, filename, commandline) where 'commandline' points to the
-  // corresponding scalar nodes in the YAML stream.
-  // If the command line contains a single argument, it is a shell-escaped
-  // command line.
-  // Otherwise, each entry in the command line vector is a literal
-  // argument to the compiler.
-  typedef std::tuple<llvm::yaml::ScalarNode *,
-                     llvm::yaml::ScalarNode *,
-                    std::vector<llvm::yaml::ScalarNode *>> CompileCommandRef;
-
-  /// \brief Converts the given array of CompileCommandRefs to CompileCommands.
-  void getCommands(ArrayRef<CompileCommandRef> CommandsRef,
-                   std::vector<CompileCommand> &Commands) const;
-
-  // Maps file paths to the compile command lines for that file.
-  llvm::StringMap<std::vector<CompileCommandRef>> IndexByFile;
-
-  /// All the compile commands in the order that they were provided in the
-  /// JSON stream.
-  std::vector<CompileCommandRef> AllCommands;
-
-  FileMatchTrie MatchTrie;
-
-  std::unique_ptr<llvm::MemoryBuffer> Database;
-  llvm::SourceMgr SM;
-  llvm::yaml::Stream YAMLStream;
-};
-
-} // end namespace tooling
-} // end namespace clang
-
-#endif