Re: [boost] [future] Early draft of wait for multiple futuresinterface

From: Peter Dimov (pdimov_at_[hidden])
Date: 2008-05-30 10:56:30

Anthony Williams:
> "Peter Dimov" <pdimov_at_[hidden]> writes:
>
>> (Ignoring the problem in which f1 completes with an exception and f2 is
>> still active.)
>
> I think that's a non-problem. If f1 completes with an exception, f1 is
> ready, so (f1 || f2) is ready and should propagate the exception,
> regardless of the state of f2.

The "problem" (bad choice of a word on my part) is with choosing between the 
behavior you outlined and the alternative, in which f1 || f2 only propagates 
an exception when both f1 and f2 end with an exception. Both approaches make 
sense (at least at first sight). I've chosen to implement the first in the 
pseudocode because it's easier, but the implementability of the second 
should probably be a concern as well.