mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
#ifndef SPROUT_FUNCTIONAL_POLYMORPHIC_BIND2ND_HPP
|
|
#define SPROUT_FUNCTIONAL_POLYMORPHIC_BIND2ND_HPP
|
|
|
|
#include <utility>
|
|
#include <type_traits>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/utility/forward.hpp>
|
|
|
|
namespace sprout {
|
|
//
|
|
// binder2nd_
|
|
// bind2nd_
|
|
//
|
|
template<typename Fn, typename T>
|
|
class binder2nd_ {
|
|
protected:
|
|
Fn op;
|
|
T value;
|
|
public:
|
|
SPROUT_CONSTEXPR binder2nd_(Fn&& x, T&& y)
|
|
: op(sprout::forward<Fn>(x)), value(sprout::forward<T>(y))
|
|
{}
|
|
template<typename Arg>
|
|
SPROUT_CONSTEXPR decltype(op(std::declval<Arg>(), value))
|
|
operator()(Arg&& x)
|
|
const SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(op(std::declval<Arg>(), value)))
|
|
{
|
|
return op(sprout::forward<Arg>(x), value);
|
|
}
|
|
};
|
|
template<typename Fn, typename T>
|
|
inline SPROUT_CONSTEXPR sprout::binder2nd_<typename std::decay<Fn>::type, typename std::decay<T>::type>
|
|
bind2nd_(Fn&& fn, T&& x) {
|
|
typedef sprout::binder2nd_<typename std::decay<Fn>::type, typename std::decay<T>::type> type;
|
|
return type(sprout::forward<Fn>(fn), sprout::forward<T>(x));
|
|
}
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_FUNCTIONAL_POLYMORPHIC_BIND2ND_HPP
|