scoped_set_env.h - mozsearch

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//

// Copyright 2019 The Abseil Authors.

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//      https://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

//

#ifndef ABSL_BASE_INTERNAL_SCOPED_SET_ENV_H_

#define ABSL_BASE_INTERNAL_SCOPED_SET_ENV_H_

#include <string>

#include "absl/base/config.h"

namespace absl {

ABSL_NAMESPACE_BEGIN

namespace base_internal {

class ScopedSetEnv {

 public:

  ScopedSetEnv(const char* var_name, const char* new_value);

  ~ScopedSetEnv();

 private:

  std::string var_name_;

  std::string old_value_;

  // True if the environment variable was initially not set.

  bool was_unset_;

};

}  // namespace base_internal

ABSL_NAMESPACE_END

}  // namespace absl

#endif  // ABSL_BASE_INTERNAL_SCOPED_SET_ENV_H_