|  | 
        A type trait that determines whether a prefer
        expression will not throw.
      
template< typename T, typename... Properties> struct is_nothrow_prefer : public integral_constant< bool, automatically_determined >
        Class template is_nothrow_prefer
        is a trait that is derived from true_type
        if the expression asio::prefer(std::declval<T>(),
        std::declval<Properties>()...)
        is noexcept; otherwise false_type.
      
        Header: asio/prefer.hpp
      
        Convenience header: asio.hpp