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