Re: [Boost-users] [Boost.Asio] defer, dispatch and post differences?

I have a feeling that a better reference might be the latest TS document ( http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/n4711.pdf) since that's more likely to be rigorously scrutinised and maintained. defer and dispatch have this to say: " 1 [ Note: The function defer satisfies the requirements for an asynchronous operation (13.2.7), except for the requirement that the operation uses post if it completes immediately. — end note ]" which seems to suggest that defer and dispatch are allowed to invoke the completion handler immediately while post is not. Perhaps defer does a post unless the handler is a continuation? I think that would make sense. R On 5 January 2018 at 16:36, Vinnie Falco via Boost-users < boost-users@lists.boost.org> wrote:

On Fri, Jan 5, 2018 at 7:21 AM, Richard Hodges via Boost-users wrote:

...

When I had a query regarding the newer standalone boost, I emailed Chris directly. He very helpfully replied promptly and fully.

I emailed him too, several months ago, and this is what I got back:

post() -> handler_is_continuation() == false defer() -> handler_is_continuation() == true

...

Every piece of information you need is there, exactly once, with not even one character more than is necessary to aid understanding.

Yeah I know what you mean. It is quintessentially D.R.Y..

I'll note that Asio does not use defer() anywhere in its implementation. I have not found any code which demonstrates its use.

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