A type trait that determines whether a prefer
expression is well-formed.
template< typename T, typename... Properties> struct can_prefer
Class template can_prefer
is a trait that is derived from true_type
if the expression asio::prefer(std::declval<T>(),
std::declval<Properties>()...)
is well formed; otherwise false_type
.
Header: asio/prefer.hpp
Convenience header: asio.hpp