forked from dolphin-emu/dolphin
81d4d7368a
Some compilers we care about (mostly g++) do not support std::make_unique yet, but we still want to use it in our codebase to make unique_ptr code more readable. This commit introduces an implementation derivated from the libc++ code in the Dolphin codebase so we can use it right now everywhere. Adapted from delroth's pull request.
83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
// Copyright 2013 Dolphin Emulator Project
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// Licensed under GPLv2
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// Refer to the license.txt file included.
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#pragma once
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// VS 2013 defines __cplusplus as 199711L but has std::make_unique.
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#if __cplusplus > 201103L || _MSC_VER >= 1800
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#include <memory>
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#else
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// Implementation of C++14 std::make_unique, which is not supported by all the
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// compilers we care about yet.
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//
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// NOTE: This code is based on the libc++ implementation of std::make_unique.
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//
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// Copyright (c) 2009-2014 by the libc++ contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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#include <cstddef>
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#include <memory>
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#include <type_traits>
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namespace std
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{
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struct unspecified {};
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template<class T>
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struct unique_if
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{
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typedef std::unique_ptr<T> unique_single;
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};
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template<class T>
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struct unique_if<T[]>
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{
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typedef std::unique_ptr<T[]> unique_array_unknown_bound;
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};
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template<class T, size_t N>
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struct unique_if<T[N]>
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{
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typedef void unique_array_known_bound;
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};
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template<class T, class... Args>
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inline typename unique_if<T>::unique_single make_unique(Args&&... args)
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{
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return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
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}
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template<class T>
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inline typename unique_if<T>::unique_array_unknown_bound make_unique(size_t n)
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{
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typedef typename std::remove_extent<T>::type U;
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return std::unique_ptr<T>(new U[n]());
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}
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template<class T, class... Args>
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typename unique_if<T>::unique_array_known_bound make_unique(Args&&...) = delete;
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} // namespace std
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#endif // __cplusplus
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