35 lines
996 B
C
35 lines
996 B
C
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/*
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* Copyright 2018-present Facebook, Inc.
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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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* http://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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#pragma once
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namespace folly {
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namespace detail {
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struct DefaultTag {};
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template <typename T>
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struct DefaultMake {
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// Required form until C++17, which permits returning objects of types which
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// are neither copy-constructible nor move-constructible.
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T* operator()(unsigned char (&buf)[sizeof(T)]) const {
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return new (buf) T();
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}
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};
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} // namespace detail
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} // namespace folly
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