Re: [boost] Official warnings policy?

Subject: Re: [boost] Official warnings policy?
From: Stewart, Robert (Robert.Stewart_at_[hidden])
Date: 2009-11-12 18:46:04

Patrick Horgan wrote:
> Stewart, Robert wrote:
>
> > Shouldn't the test confirm that an int can be assigned to a
> > short in a variant and that the resulting short has the same
> > value as when the same int is assigned to a short not in a
> > variant?  That test need not produce a warning because
> > comparing the results from the two assignments proves or
> > disproves the behavior of variant.
> >
> The point of the warning is that it is not guaranteed that
> the resulting
> short will have the same value.  On my machine the maximum value of a
> short is 65535, and of an int is 18446744073709551615.  That leaves
> 18446744073709486080 values for which the resulting short
> will truncate
> the int value and only 65536 which wouldn't.  If you wanted
> to be able
> to use int like this with variant, you'd have to change the design of
> variant.  If it's a requirement that this work, then you'd file a bug.

I understand all of that quite well.  The test being discussed assigns 58.

_____
Rob Stewart                           robert.stewart_at_[hidden]
Software Engineer, Core Software      using std::disclaimer;
Susquehanna International Group, LLP  http://www.sig.com

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