On Wed, 27 Feb 2008 09:35:40 -0500
Clint Adams <[EMAIL PROTECTED]> wrote:
> On Wed, Feb 20, 2008 at 07:09:05AM +0000, Frederik Eaton wrote:
> > Hello, one of my scripts has broken because of the following change:
> >
> > $ zsh --version
> > zsh 4.3.2 (i686-pc-linux-gnu)
> > $ x=(); echo ${+x[(r)blah]}
> > 0
> >
> > $ zsh --version
> > zsh 4.3.5 (i686-pc-linux-gnu)
> > $ x=(); echo ${+x[(r)blah]}
> > 1
> >
> > Is the behaviour of zsh's parameter expansion supposed to be stable?
>
> I think this is related to 23273*
No, this is unexpected fallout from the changes to make zero subscripts
behave in a more rational fashion, 23562. I hadn't even remembered this
form worked with subscripts, but the the manual certainly suggests it
should (and it's definitely useful). I've added a test that should keep it
working.
Index: Src/subst.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/subst.c,v
retrieving revision 1.82
diff -u -r1.82 subst.c
--- Src/subst.c 16 Dec 2007 14:05:16 -0000 1.82
+++ Src/subst.c 27 Feb 2008 15:28:41 -0000
@@ -1915,7 +1915,8 @@
hkeys|hvals|
(arrasg ? SCANPM_ASSIGNING : 0)|
(qt ? SCANPM_DQUOTED : 0))) ||
- (v->pm && (v->pm->node.flags & PM_UNSET)))
+ (v->pm && (v->pm->node.flags & PM_UNSET)) ||
+ (v->flags & VALFLAG_EMPTY))
vunset = 1;
if (wantt) {
Index: Test/D04parameter.ztst
===================================================================
RCS file: /cvsroot/zsh/zsh/Test/D04parameter.ztst,v
retrieving revision 1.29
diff -u -r1.29 D04parameter.ztst
--- Test/D04parameter.ztst 30 Oct 2007 14:01:35 -0000 1.29
+++ Test/D04parameter.ztst 27 Feb 2008 15:28:41 -0000
@@ -52,6 +52,14 @@
0:$+...
>1 1 0 0
+ x=()
+ print ${+x} ${+x[1]} ${+x[(r)foo]} ${+x[(r)bar]}
+ x=(foo)
+ print ${+x} ${+x[1]} ${+x[(r)foo]} ${+x[(r)bar]}
+0:$+... with arrays
+>1 0 0 0
+>1 1 1 0
+
set1=set1v
null1=
print ${set1:-set1d} ${set1-set2d} ${null1:-null1d} ${null1-null2d} x
--
Peter Stephenson <[EMAIL PROTECTED]> Software Engineer
CSR PLC, Churchill House, Cambridge Business Park, Cowley Road
Cambridge, CB4 0WZ, UK Tel: +44 (0)1223 692070
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