flag_saver.h

// Copyright 2022 Google LLC. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
 
#ifndef PACKAGER_FLAG_SAVER_H_
#define PACKAGER_FLAG_SAVER_H_
 
#include <absl/flags/flag.h>
 
namespace shaka {
 
template <typename T>
class FlagSaver {
 public:
  FlagSaver(absl::Flag<T>* flag)
      : flag_(flag), original_value_(absl::GetFlag(*flag)) {}
 
  ~FlagSaver() { absl::SetFlag(flag_, original_value_); }
 
 private:
  absl::Flag<T>* flag_;  // unowned
  T original_value_;
};
 
}  // namespace shaka
 
#endif  // PACKAGER_FLAG_SAVER_H_