A customisation point that notifies an operation state object to start its associated operation.
constexpr unspecified start = unspecified;
The name execution::start
denotes a customisation point object.
The expression execution::start(R)
for some subexpression R
is expression-equivalent to:
R.start()
,
if that expression is valid.
start(R)
,
if that expression is valid, with overload resolution performed in a
context that includes the declaration void
start();
and that does not include a declaration of execution::start
.
execution::start(R)
is ill-formed.
Header: asio/execution/start.hpp
Convenience header: asio/execution.hpp