Re: 8-bit parameter names?

[Peter Stephenson <pws@csr.com>]

Bart Schaefer wrote:
> Is it intentional that 8-bit characters can be used in parameter name
> identifiers, or is it a bug?

There's a weird assumption that 8-bit characters from 160 can be treated
as alphanumeric.   This doesn't really work for any character set I'm
aware of.

    for (t0 = 0240; t0 != 0400; t0++)
	typtab[t0] = IALPHA | IALNUM | IIDENT | IUSER | IWORD;

Arguably we could just delete that.  The internal tests ialpha and
ialnum are used very infrequently in cases where use of an 8-bit
character isn't likely---they are not used to replace isalpha() and
isalnum() in pattern matching.  I don't know what characters you can
have in user names, but it's only used to test what follows a ~.  iword
needs redoing completely for Unicode anyway; we need to base it on
WORDCHARS plus isalnum() or iswalnum, a fixed table entry isn't good
enough.  (The [[:WORD:]] test I just added suffers from this too, but it
is at least consistent with zle which is its main purpose.)

-- 
Peter Stephenson <pws@csr.com>                  Software Engineer
CSR PLC, Churchill House, Cambridge Business Park, Cowley Road
Cambridge, CB4 0WZ, UK                          Tel: +44 (0)1223 692070


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