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