2019-05-28 13:03:08 +00:00
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/*
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2020-05-08 16:37:49 +00:00
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* Copyright (c) Facebook, Inc. and its affiliates.
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2019-05-28 13:03:08 +00:00
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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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2020-05-08 16:37:49 +00:00
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* http://www.apache.org/licenses/LICENSE-2.0
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2019-05-28 13:03:08 +00:00
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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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2020-05-08 16:37:49 +00:00
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#pragma once
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2019-05-28 13:03:08 +00:00
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2020-05-08 16:37:49 +00:00
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namespace folly {
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2019-05-28 13:03:08 +00:00
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2020-05-08 16:37:49 +00:00
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// StaticConst
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//
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// A template for defining ODR-usable constexpr instances. Safe from ODR
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// violations and initialization-order problems.
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2019-05-28 13:03:08 +00:00
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2020-05-08 16:37:49 +00:00
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template <typename T>
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struct StaticConst {
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static constexpr T value{};
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};
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2019-05-28 13:03:08 +00:00
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2020-05-08 16:37:49 +00:00
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template <typename T>
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constexpr T StaticConst<T>::value;
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} // namespace folly
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