Abseil Common Libraries (C++) (grcp 依赖)
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45 lines
1.2 KiB
45 lines
1.2 KiB
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// Copyright 2019 The Abseil Authors. |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// https://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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// |
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#ifndef ABSL_BASE_INTERNAL_SCOPED_SET_ENV_H_ |
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#define ABSL_BASE_INTERNAL_SCOPED_SET_ENV_H_ |
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#include <string> |
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#include "absl/base/config.h" |
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namespace absl { |
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ABSL_NAMESPACE_BEGIN |
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namespace base_internal { |
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class ScopedSetEnv { |
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public: |
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ScopedSetEnv(const char* var_name, const char* new_value); |
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~ScopedSetEnv(); |
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private: |
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std::string var_name_; |
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std::string old_value_; |
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// True if the environment variable was initially not set. |
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bool was_unset_; |
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}; |
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} // namespace base_internal |
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ABSL_NAMESPACE_END |
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} // namespace absl |
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#endif // ABSL_BASE_INTERNAL_SCOPED_SET_ENV_H_
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