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Request
the io_context
to invoke the given function object.
template<
typename Function,
typename OtherAllocator>
void defer(
Function && f,
const OtherAllocator & a) const;
This function is used to ask the io_context
to execute the given function object. The function object will never be
executed inside defer(). Instead, it will be scheduled to
run on the io_context.
If the current thread belongs to the io_context,
defer() will delay scheduling the function object until the
current thread returns control to the pool.
The function object to be called. The executor will make a copy of the handler object as required. The function signature of the function object must be:
void function();
An allocator that may be used by the executor to allocate the internal storage needed for function invocation.