mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-14 10:39:05 +00:00
36 lines
1 KiB
C++
36 lines
1 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2014 Bolero MURAKAMI
|
|
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_PRE_DEC_HPP
|
|
#define SPROUT_FUNCTIONAL_PRE_DEC_HPP
|
|
|
|
#include <utility>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/utility/forward.hpp>
|
|
|
|
namespace sprout {
|
|
//
|
|
// pre_dec
|
|
//
|
|
template<typename T = void>
|
|
struct pre_dec;
|
|
template<>
|
|
struct pre_dec<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_PRE_DEC_HPP
|