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Diffstat (limited to 'src/utils/make_unique.hpp')
-rw-r--r-- | src/utils/make_unique.hpp | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/src/utils/make_unique.hpp b/src/utils/make_unique.hpp new file mode 100644 index 0000000..67964c8 --- /dev/null +++ b/src/utils/make_unique.hpp @@ -0,0 +1,78 @@ +/* + * Copyright (c) 2012 Nathan L. Binkert <nate@binkert.org> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#ifndef __MAKE_UNIQUE_HH__ +#define __MAKE_UNIQUE_HH__ + +#include <memory> + +namespace std { +namespace detail { + +// helper to construct a non-array unique_ptr +template <typename T> +struct make_unique_helper { + typedef std::unique_ptr<T> unique_ptr; + + template <typename... Args> + static inline unique_ptr make(Args&&... args) { + return unique_ptr(new T(std::forward<Args>(args)...)); + } +}; + +// helper to construct an array unique_ptr +template<typename T> +struct make_unique_helper<T[]> { + typedef std::unique_ptr<T[]> unique_ptr; + + template <typename... Args> + static inline unique_ptr make(Args&&... args) { + return unique_ptr(new T[sizeof...(Args)]{std::forward<Args>(args)...}); +} +}; + +// helper to construct an array unique_ptr with specified extent +template<typename T, std::size_t N> +struct make_unique_helper<T[N]> { + typedef std::unique_ptr<T[]> unique_ptr; + + template <typename... Args> + static inline unique_ptr make(Args&&... args) { + static_assert(N >= sizeof...(Args), + "For make_unique<T[N]> N must be as largs as the number of arguments"); + return unique_ptr(new T[N]{std::forward<Args>(args)...}); + } + +#if __GNUC__ == 4 && __GNUC_MINOR__ <= 6 + // G++ 4.6 has an ICE when you have no arguments + static inline unique_ptr make() { + return unique_ptr(new T[N]); + } +#endif +}; + + +} // namespace detail + +template <typename T, typename... Args> +inline typename detail::make_unique_helper<T>::unique_ptr +make_unique(Args&&... args) { + return detail::make_unique_helper<T>::make(std::forward<Args>(args)...); +} + +} // namespace std + +#endif // __MAKE_UNIQUE_HH__ |