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Sprout/sprout/weed/detail/is_both_unused.hpp
2011-11-13 17:54:38 +09:00

30 lines
775 B
C++

#ifndef SPROUT_WEED_DETAIL_IS_BOTH_UNUSED_HPP
#define SPROUT_WEED_DETAIL_IS_BOTH_UNUSED_HPP
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/weed/traits/type/is_unused.hpp>
namespace sprout {
namespace weed {
namespace detail {
template<typename T, typename U, typename = void>
struct is_both_unused
: public std::false_type
{};
template<typename T, typename U>
struct is_both_unused<
T,
U,
typename std::enable_if<
sprout::weed::traits::is_unused<T>::value
&& sprout::weed::traits::is_unused<U>::value
>::type
>
: public std::true_type
{};
} // namespace detail
} // namespace weed
} // namespace sprout
#endif // #ifndef SPROUT_WEED_DETAIL_IS_BOTH_UNUSED_HPP