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68 lines
1.3 KiB
68 lines
1.3 KiB
// -*-c++-*-
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// vim: set ft=cpp:
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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#ifndef cm_memory
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#define cm_memory
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#include <memory> // IWYU pragma: export
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#if !defined(CMake_HAVE_CXX_MAKE_UNIQUE)
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# include <cstddef>
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# include <type_traits>
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# include <utility>
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#endif
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namespace cm {
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#if defined(CMake_HAVE_CXX_MAKE_UNIQUE)
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using std::make_unique;
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#else
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namespace internals {
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template <typename T>
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struct make_unique_if
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{
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using single = std::unique_ptr<T>;
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};
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template <typename T>
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struct make_unique_if<T[]>
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{
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using unbound_array = std::unique_ptr<T[]>;
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};
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template <typename T, std::size_t N>
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struct make_unique_if<T[N]>
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{
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using bound_array = void;
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};
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}
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template <typename T, typename... Args>
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typename internals::make_unique_if<T>::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 <typename T>
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typename internals::make_unique_if<T>::unbound_array make_unique(std::size_t n)
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{
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using E = typename std::remove_extent<T>::type;
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return std::unique_ptr<T>(new E[n]());
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}
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template <typename T, typename... Args>
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typename internals::make_unique_if<T>::bound_array make_unique(Args&&...) =
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delete;
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#endif
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} // namespace cm
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#endif
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