Sprout/sprout/functional/polymorphic/less_equal.hpp
2012-06-21 13:34:26 +09:00

28 lines
792 B
C++

#ifndef SPROUT_FUNCTIONAL_POLYMORPHIC_LESS_EQUAL_HPP
#define SPROUT_FUNCTIONAL_POLYMORPHIC_LESS_EQUAL_HPP
#include <utility>
#include <sprout/config.hpp>
#include <sprout/utility/forward.hpp>
namespace sprout {
//
// less_equal_t
// less_equal_
//
struct less_equal_t {
public:
template<typename T, typename U>
SPROUT_CONSTEXPR decltype(std::declval<T>() <= std::declval<U>())
operator()(T&& x, U&& y)
const SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(std::declval<T>() <= std::declval<U>()))
{
return sprout::forward<T>(x) <= sprout::forward<U>(y);
}
};
namespace {
SPROUT_STATIC_CONSTEXPR sprout::less_equal_t less_equal_{};
} // anonymous-namespace
} // namespace sprout
#endif // #ifndef SPROUT_FUNCTIONAL_POLYMORPHIC_LESS_EQUAL_HPP