Re: Just curious: who is using Pike for what?

On Wed, Dec 14, 2016 at 11:45 PM, Peter Bortas @ Pike  importmöte för
mailinglistan <[email protected]> wrote:
> With my compatibility maintainer hat on that is a major
> change. Potential compatibility problems:
>
> * strings start changing lenght.
>
> * lower_case() and upper_case() as used for normalization before
>   string comparisons change. Granted, the change will sometimes be for
>   the better, but still a change.

If you're doing it for case insensitive comparisons, the true solution
is to add case_fold. The Unicode standard has strong promises of
backward compatibility regarding case folding, plus it's guaranteed to
be idempotent (unlike messing with upper- and lower-casing, which can
take several iterations to stabilize).

That would be a change in user-level code, though, so it'd be a new
feature rather than any sort of backward compatibility break. If
you've been using lower_case (or upper_case) on user input and then
storing the result, your code is *already wrong*, and an update to a
new version of UnicodeData.txt could break your code already.

ChrisA