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a564590 Jan 2, 2013
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/*
* 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__
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