On Wed, 9 Apr 1997, Philip Guenther wrote:
BTW: if you find a program that uses locales for [a-z], then it's
broken. Locales should only be used for the [:foo:], [.ch.] and [=n=]
blobs.
POSIX allows this if supported. If you use the C library functions to
determine your character classes, capitalization issues, which bytes are
letters or digits, etc., then locale is used.
If your program does not use the C library to make these determinations,
then to some minds your program is broken too.
I must admit though, perl is the probably the only program that supports
this.
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