Re: RFC 165 (v1) Allow Varibles in tr///

>For the record, the UTF8 version of tr/// does not use a plain 256K
>table.  It uses a data strcuture called a 'swash'; this is also the
>data structure that is used by the UTF8 versions of 'uc' etc., the
>\p{...} regex escapes, and the others.  The swash is based on a hash,
>and the code is in utf8.c.

And is connected to a "swatch":

/usr/local/src/perl/utf8.c:/* a "swash" is a swatch hash */

--tom