mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-12-25 21:35:41 +00:00
45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2013 Bolero MURAKAMI
|
|
Copyright (C) 2011 RiSK (sscrisk)
|
|
https://github.com/bolero-MURAKAMI/Sprout
|
|
|
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
=============================================================================*/
|
|
#ifndef SPROUT_FUNCTIONAL_NEGATE_HPP
|
|
#define SPROUT_FUNCTIONAL_NEGATE_HPP
|
|
|
|
#include <utility>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/utility/forward.hpp>
|
|
|
|
namespace sprout {
|
|
|
|
// 20.8.4 Arithmetic operations
|
|
template<typename T = void>
|
|
struct negate {
|
|
public:
|
|
typedef T argument_type;
|
|
typedef T result_type;
|
|
public:
|
|
SPROUT_CONSTEXPR T operator()(T const& x) const {
|
|
return -x;
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct negate<void> {
|
|
public:
|
|
typedef void is_transparent;
|
|
public:
|
|
template<typename T>
|
|
SPROUT_CONSTEXPR decltype(-std::declval<T>())
|
|
operator()(T&& x)
|
|
const SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(-std::declval<T>()))
|
|
{
|
|
return -sprout::forward<T>(x);
|
|
}
|
|
};
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_FUNCTIONAL_NEGATE_HPP
|