//===--- FileSystem.cpp - Extra helpers for manipulating files --*- C++ -*-===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//

#ifndef SWIFT_BASIC_FILESYSTEM_H
#define SWIFT_BASIC_FILESYSTEM_H

#include "llvm/ADT/Twine.h"
#include <system_error>

namespace swift {
  /// Moves a file from \p source to \p destination, unless there is already
  /// a file at \p destination that contains the same data as \p source.
  ///
  /// In the latter case, the file at \p source is deleted. If an error occurs,
  /// the file at \p source will still be present at \p source.
  std::error_code moveFileIfDifferent(const llvm::Twine &source,
                                      const llvm::Twine &destination);
}

#endif
