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[Bug libstdc++/39168] Incorrect interpretation of CHAR_MAX inside grouping string in monetary and numeric facets.
- From: "tsyvarev at ispras dot ru" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 13 Feb 2009 15:04:42 -0000
- Subject: [Bug libstdc++/39168] Incorrect interpretation of CHAR_MAX inside grouping string in monetary and numeric facets.
- References: <bug-39168-16694@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #12 from tsyvarev at ispras dot ru 2009-02-13 15:04 -------
Let's consider the following situation (seems lifelike to me). Suppose one
needs a representation of numbers in which only the last 3 digits are separated
from all other digits (grouped), like "1234,567" or "1234567,890". Other
separators shouldn't appear.
Grouping string "\003" doesn't fit for this purpose as it separates all
3-digits groups: "1,234,567".
Before this PR, I thought that "\003\177" is sufficient for this purpose. But,
as I understand now, the representations like "12,34,567" are acceptable in
this case, which is not what I would like to have.
Could you suggest which grouping string should be used to do such number
representation? Or is this unachievable?
I investigated locale support in POSIX, such number representation is achieved
there with "\003\177". It seems strange for me that similar mechanism is not
work with C++ locales.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39168