/* * 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__