* PATCH: 3.1.5-pws-N: unset fix
@ 1999-05-07 13:40 Peter Stephenson
1999-05-31 1:28 ` Bart Schaefer
0 siblings, 1 reply; 2+ messages in thread
From: Peter Stephenson @ 1999-05-07 13:40 UTC (permalink / raw)
To: Zsh hackers list
This fixes the parameter bugs I reported yesterday: first, typeset -m
restored unset parameters; second, global parameters didn't get removed
from the parameter table by an unset inside a function (without a typeset,
they will be restored as globals anyway, so this was definitely a bug).
The first hunk of this is relevant to 3.0.6, although the if (pm->flags &
PM_UNSET) test needs adding by hand. The second bug does not exist as such
in 3.0.6 --- though I noticed that if a parameter that was local in one
function is unset in a function called from that, it will be restored next
time in global scope, in other words this:
% fn2() { unset foo; }
% fn1() { typeset foo=bar; fn2; foo=notbar; }
% fn1
% print $foo
notbar
which may not be intended, and does not happen in 3.1.5++ (foo is restored
at the level of fn1). It compares with
% fn1() { typeset foo=bar; unset foo; foo=notbar; }
% fn1
% print ${+foo}
0
so it may be a bug. Should I send a patch for both for 3.0.6?
--- Src/builtin.c.unset Mon May 3 13:13:57 1999
+++ Src/builtin.c Fri May 7 15:16:54 1999
@@ -1768,7 +1768,8 @@
for (i = 0; i < paramtab->hsize; i++) {
for (pm = (Param) paramtab->nodes[i]; pm;
pm = (Param) pm->next) {
- if ((pm->flags & PM_RESTRICTED) && isset(RESTRICTED))
+ if (((pm->flags & PM_RESTRICTED) && isset(RESTRICTED)) ||
+ (pm->flags & PM_UNSET))
continue;
if (domatch(pm->nam, com, 0))
addlinknode(pmlist, pm);
--- Src/params.c.unset Wed May 5 09:34:37 1999
+++ Src/params.c Fri May 7 15:20:08 1999
@@ -1755,7 +1755,7 @@
* Some specials, such as those used in zle, still need removing
* from the parameter table; they have the PM_REMOVABLE flag.
*/
- if ((locallevel && locallevel >= pm->level) ||
+ if ((pm->level && locallevel >= pm->level) ||
(pm->flags & (PM_SPECIAL|PM_REMOVABLE)) == PM_SPECIAL)
return;
--
Peter Stephenson <pws@ibmth.df.unipi.it> Tel: +39 050 844536
WWW: http://www.ifh.de/~pws/
Dipartimento di Fisica, Via Buonarroti 2, 56127 Pisa, Italy
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: PATCH: 3.1.5-pws-N: unset fix
1999-05-07 13:40 PATCH: 3.1.5-pws-N: unset fix Peter Stephenson
@ 1999-05-31 1:28 ` Bart Schaefer
0 siblings, 0 replies; 2+ messages in thread
From: Bart Schaefer @ 1999-05-31 1:28 UTC (permalink / raw)
To: Peter Stephenson, Zsh hackers list
On May 7, 3:40pm, Peter Stephenson wrote:
} Subject: PATCH: 3.1.5-pws-N: unset fix
}
} The first hunk of this is relevant to 3.0.6, although the if (pm->flags &
} PM_UNSET) test needs adding by hand.
Are you sure this is relevant to 3.0.6? As far as I know, prior to the
associative array changes in 3.1.5+ parameters with PM_UNSET were never
permitted to appear in the paramtab. (So the 3.1.5+ bug is probably my
fault for missing a spot where PM_UNSET needed to be tested.)
} [...] in 3.0.6 [...] I noticed that if a parameter that was local in one
} function is unset in a function called from that, it will be restored next
} time in global scope [...] which may not be intended [...]
} so it may be a bug. Should I send a patch for both for 3.0.6?
You should either send a patch or make mention of the difference in the
FAQ somewhere, or perhaps both.
--
Bart Schaefer Brass Lantern Enterprises
http://www.well.com/user/barts http://www.brasslantern.com
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