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A customisation point that delivers an error notification to a receiver.
constexpr unspecified set_error = unspecified;
The name execution::set_error denotes a customisation point
object. The expression execution::set_error(R,
E)
for some subexpressions R
and E are expression-equivalent
to:
R.set_error(E),
if that expression is valid. If the function selected does not send the
error E to the receiver
R's error channel, the
program is ill-formed with no diagnostic required.
set_error(R, E), if that expression is valid, with overload
resolution performed in a context that includes the declaration void set_error(); and that does not include a declaration
of execution::set_error. If the function selected
by overload resolution does not send the error E
to the receiver R's error
channel, the program is ill-formed with no diagnostic required.
execution::set_error(R, E) is ill-formed.
Header: asio/execution/set_error.hpp
Convenience header: asio/execution.hpp