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Fix, test and comment unsetting and resetting of special tied parameters

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This commit is contained in:
Peter Stephenson 2001-05-19 23:47:58 +00:00
parent fbe51d3ee9
commit 6ea2dab092
3 changed files with 37 additions and 1 deletions
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12
Doc/Zsh/params.yo
View file

@ -632,7 +632,17 @@ The version number of this zsh.
enditem()
texinode(Parameters Used By The Shell)()(Parameters Set By The Shell)(Parameters)
sect(Parameters Used By The Shell)
The following parameters are used by the shell:
The following parameters are used by the shell.
In cases where there are two parameters with an upper- and lowercase
form of the same name, such as tt(path) and tt(PATH), the lowercase form
is an array and the uppercase form is a scalar with the elements of the
array joined together by colons. These are similar to tied parameters
created via `tt(typeset -T)'. The normal use for the colon-separated
form is for exporting to the environment, while the array form is easier
to manipulate within the shell. Note that unsetting either of the pair
will unset the other; they retain their special properties when
recreated, and recreating one of the pair will recreate the other.
startitem()
vindex(ARGV0)

6
Src/params.c
View file

@ -669,6 +669,12 @@ createparam(char *name, int flags)
if (oldpm && (oldpm->level == locallevel || !(flags & PM_LOCAL))) {
if (!(oldpm->flags & PM_UNSET) || (oldpm->flags & PM_SPECIAL)) {
oldpm->flags &= ~PM_UNSET;
if ((oldpm->flags & PM_SPECIAL) && oldpm->ename) {
Param altpm =
(Param) paramtab->getnode(paramtab, oldpm->ename);
if (altpm)
altpm->flags &= ~PM_UNSET;
}
return NULL;
}
if ((oldpm->flags & PM_RESTRICTED) && isset(RESTRICTED)) {

20
Test/D04parameter.ztst
View file

@ -526,3 +526,23 @@
>fixed
>the
>shell
unset SHLVL
(( SHLVL++ ))
print $SHLVL
0:Unsetting and recreation of numerical special parameters
>1
unset manpath
print $+MANPATH
manpath=(/here /there)
print $MANPATH
unset MANPATH
print $+manpath
MANPATH=/elsewhere:/somewhere
print $manpath
0:Unsetting and recreation of tied special parameters
>0
>/here:/there
>0
>/elsewhere /somewhere