Sprout/sprout/functional/polymorphic/multiplies.hpp
2012-12-17 23:10:23 +09:00

28 lines
792 B
C++

#ifndef SPROUT_FUNCTIONAL_POLYMORPHIC_MULTIPLIES_HPP
#define SPROUT_FUNCTIONAL_POLYMORPHIC_MULTIPLIES_HPP
#include <utility>
#include <sprout/config.hpp>
#include <sprout/utility/forward.hpp>
namespace sprout {
//
// multiplies_t
// multiplies_
//
struct multiplies_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::multiplies_t multiplies_ = {};
} // anonymous-namespace
} // namespace sprout
#endif // #ifndef SPROUT_FUNCTIONAL_POLYMORPHIC_MULTIPLIES_HPP