Re: [boost] [WG21 mailing] N4453 Resumable expressions

Subject: Re: [boost] [WG21 mailing] N4453 Resumable expressions
From: Avi Kivity (avi_at_[hidden])
Date: 2015-04-15 15:26:59

On 04/15/2015 04:27 PM, Niall Douglas wrote:
> I'm finding Chris' paper on resumable expressions instead of compiler
> magic created resumable functions awfully compelling:
>
> http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4453.pdf
>
> I essentially proposed the same with my functionally composed
> constexpr basic_future design some months ago.
>

Regarding that, you may be interested in a similar effort, seatar [1], 
with very lightweight thread-unsafe futures and continuations (future<> 
size is 16 bytes) with multi-core utilization provided by explicit 
dispatching.

> Would anyone else like to comment on this library based instead of
> compiler based resumable execution? I'm not against some compiler
> support for resumable execution, but I am finding the await based
> proposal highly problematic, and Chris does an excellent job in
> summarising my own thoughts on what's wrong with it.
>
>

[1] https://github.com/cloudius-systems/seastar, see core/future.hh