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Subject: Re: [boost] [afio][v1.30 "C++ Now edition" released]
From: Mathias Gaunard (mathias.gaunard_at_[hidden])
Date: 2015-03-19 16:26:15

On 19/03/2015 20:37, Niall Douglas wrote:

> So basically AFIO currently looks the way it does mostly due to
> legacy baggage and problems with C++ 11 back in 2013. Each release I
> refactor some of the baggage out. v1.3 was the first to drop < VS2013
> support for example, it was a ton of work purging the VS2010 custom
> code paths. v1.4 will purge async_io_op + when_any/all and replace
> those with a proper C++ 17 compliant custom continuable future type
> which understands resumable functions. A big part of why that didn't
> enter v1.3 is because VS2015 and its resumable functions support I
> can test against isn't released yet, plus I was waiting for the
> Concurrency TS to firm up, it's only really stabilised these past six
> months.

Thanks for the clarification.

So v1.4 will be the interface that will be submitted for inclusion into

> AFIO uses ASIO's event loop. It doesn't use the async_result idiom of
> ASIO because for file i/o you want strong graph ordering, and that's
> a pain to do with async_result. A more functional idiom, for which I
> chose future-promise, makes strong ordering much easier to program.
> Once I get Fibers/resumable function support in there next release,
> writing strongly graph ordered filing system algorithms ought to
> become optimally easy, and then I can get down to writing race free
> tree visitors etc which right now are very messy to write and debug.

I think it would be useful to be able to make use of the future-promise
idiom for other ASIO code as well.
Is it possible to use your futures for any ASIO async_result?

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