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Re: Uncacheable facet testcase
Martin Sebor writes:
> Nathan Myers wrote:
> > On Wed, Jun 04, 2003 at 12:28:37AM -0400, Jerry Quinn wrote:
> >
> >>I discovered the following (unfortunate) testcase of a facet that
> >>cannot be cached for later use. The implication is that in general,
> >>the facets canot be cached safely. As best as I can interpret the
> >>spec, this program is valid.
> >>...
> >>bool flip = false;
> >>...
> >> string_type do_truename() const
> >> { if (flip) return "false"; else return "true"; }
> >
> >
> > If this example appears to be allowed, that is a defect. We should
> > not attempt to support any particular semantics for such a facet.
> > It was a specific design goal of the locale architecture that all
> > facet results can be assumed to be stable and cacheable.
>
> You're right, it is (or soon will likely be) a defect. We discussed
> it in some detail last year. The issue that tracks it is 360:
>
> http://anubis.dkuug.dk/jtc1/sc22/wg21/docs/lwg-active.html#360
I'm glad to see that! I thought this test case just about sunk
caching. Consider it withdrawn.
Jerry