[Python-Dev] Re: Be Honest about LC_NUMERIC [REPOST]

[Tim Peters]

[Tim]
>> if a C implementation does choose to support them, then the
>> spellings for input are standardized, although a locale is allowed
>> to *produce* any spellings whatsoever).

[martin at v.loewis.de]
> Where exactly does it (C99) say that the spellings are
> locale-specific?

I can't find anything in the std supporting the claim.  For that matter, I
can't find anything in the std supporting the notion that a locale is
allowed to insert thousand-separator characters either (can you?).

There's lots of stuff allowing a locale to *accept* locale-specific
spellings (when parsing strings), in addition to the "C" locale spellings;
the other direction (producing strings) appears much less permissive.