Re: More POSIX developments

[Peter Stephenson <pws@xxxxxxx>]

Bart Schaefer wrote:
> Finally got a chance to look at this.
> 
> On Mon, 27 Sep 2004, Peter Stephenson wrote:
> 
> > The following patch, which I won't commit until we've decided which way
> > to go, tries to cover the bases by making test work (more) like POSIX
> > while leaving [[ ... ]] the way it is.  The errors now return status 2
> > from evalcond, but for backward compatibility [[ ... ]] turns them into
> > shell errors.
> 
> I think this would be OK.

Yes, the more I think about it the less likely it is that someone using
"test" or "[" syntax wants anything other than standard-compliant
behaviour.

> > In other words, could I remove zwarnnamopt and make zwarnnam behave like 
> > that?
> 
> I think that'd be safe, but I wouldn't object to a second opinion.

I made the change and none of the tests failed.  I think it's neater to
do it like this and see if any problems turn up.

Before I commit the patch, here's some proposed documentation.

Index: Doc/Zsh/builtins.yo
===================================================================
RCS file: /cvsroot/zsh/zsh/Doc/Zsh/builtins.yo,v
retrieving revision 1.70
diff -u -r1.70 builtins.yo
--- Doc/Zsh/builtins.yo	30 Jun 2004 11:10:45 -0000	1.70
+++ Doc/Zsh/builtins.yo	4 Oct 2004 10:21:15 -0000
@@ -1124,6 +1124,11 @@
 item(tt([) [ var(arg) ... ] tt(]))(
 Like the system version of tt(test).  Added for compatibility;
 use conditional expressions instead (see noderef(Conditional Expressions)).
+The main differences are:  this command is not handled syntactically, so for
+example an empty variable expansion may cause an argument to be omitted;
+syntax errors cause status 2 to be returned instead of a shell error; and
+arithmetic operators expect integer arguments rather than arithemetic
+expressions.
 )
 findex(times)
 cindex(shell, timing)

-- 
Peter Stephenson <pws@xxxxxxx>                  Software Engineer
CSR Ltd., Science Park, Milton Road,
Cambridge, CB4 0WH, UK                          Tel: +44 (0)1223 692070


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