[Bug libstdc++/39168] Incorrect interpretation of CHAR_MAX inside grouping string in monetary and numeric facets.

["paolo dot carlini at oracle dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #8 from paolo dot carlini at oracle dot com  2009-02-13 11:31 -------
(In reply to comment #7)
                                  Standard use term "unlimited length", which
> means(as I understand) that all other digits should incorporate in only one
> group - only "123456" is correct.

I don't read that anywhere in the Standard.

> The thing is that, according to the standard, CHAR_MAX should be treats similar
> as -1. But implementation treats string(1, -1) as no grouping at all, and stops
> read, when has encountered symbol ','. So only "123" is accumulated.
> This behaviour seems correct for me (though standard treats only string() as no
> grouping at all, 22.2.2.1.2, p8).
> So with string(1, CHAR_MAX) only "123" should be accumulated, not "123,456".

No, no, it is not correct, it is a bug in the current implementation. See where
bool discard is defined, in Stage 2. (1, -1) (or (1, CHAR_MAX)) are not
special, are normal groupings, that must be enforced.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39168