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https://github.com/PaddlePaddle/FastDeploy.git
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59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
/* Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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#pragma once
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#include <memory>
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namespace fastdeploy {
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namespace utils {
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// Trait to select overloads and return types for MakeUnique.
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template <typename T>
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struct MakeUniqueResult {
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using scalar = std::unique_ptr<T>;
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};
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template <typename T>
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struct MakeUniqueResult<T[]> {
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using array = std::unique_ptr<T[]>;
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};
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template <typename T, size_t N>
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struct MakeUniqueResult<T[N]> {
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using invalid = void;
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};
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// MakeUnique<T>(...) is an early implementation of C++14 std::make_unique.
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// It is designed to be 100% compatible with std::make_unique so that the
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// eventual switchover will be a simple renaming operation.
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template <typename T, typename... Args>
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typename MakeUniqueResult<T>::scalar make_unique(Args &&... args) { // NOLINT
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return std::unique_ptr<T>(
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new T(std::forward<Args>(args)...)); // NOLINT(build/c++11)
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}
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// Overload for array of unknown bound.
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// The allocation of arrays needs to use the array form of new,
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// and cannot take element constructor arguments.
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template <typename T>
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typename MakeUniqueResult<T>::array make_unique(size_t n) {
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return std::unique_ptr<T>(new typename std::remove_extent<T>::type[n]());
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}
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// Reject arrays of known bound.
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template <typename T, typename... Args>
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typename MakeUniqueResult<T>::invalid make_unique(Args &&... /* args */) =
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delete; // NOLINT
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} // namespace utils
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} // namespace fastdeploy
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