co_spawn (2 of 2 overloads)

Spawn a new thread of execution.

template<
    typename ExecutionContext,
    typename F,
    typename CompletionToken>
DEDUCED co_spawn(
    ExecutionContext & ctx,
    F && f,
    CompletionToken && token,
    typename enable_if< is_convertible< ExecutionContext &, execution_context & >::value >::type *  = 0);

The entry point function object f must have the signature:

awaitable<void, E> f();

where E is convertible from ExecutionContext::executor_type.