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Re: Problematic change in alias behavior in pre3
- X-seq: zsh-workers 1733
- From: "Bart Schaefer" <schaefer@xxxxxxxxxxxxxxxxxxxxxxx>
- To: zsh-workers@xxxxxxxxxxxxxxx
- Subject: Re: Problematic change in alias behavior in pre3
- Date: Sun, 21 Jul 1996 11:51:35 -0700
- In-reply-to: "Bart Schaefer" <schaefer@xxxxxxxxxxxxxxxxxxxxxxx> "Problematic change in alias behavior in pre3" (Jul 21, 10:41am)
- References: <960721104147.ZM18816@xxxxxxxxxxxxxxxxxxxxxxx>
- Reply-to: schaefer@xxxxxxx
On Jul 21, 10:41am, Bart Schaefer wrote:
} Subject: Problematic change in alias behavior in pre3
}
} zsh% alias show="noglob show"
} zsh% show=()
} zsh: parse error near `)'
}
} Why does the existence of the alias mess up the variable assignment?
I don't know how/why this worked in pre2, but in pre3 gettokstr() returns
"show=stuff" for ENVSTRING, but only "show" for ENVARRAY. Thus the token
"show" is incmdpos when when exalias(), and thus is subject to expansion.
It's not sufficient to assign incmdpos=0 when ENVARRAY, because then this
kind of thing fails:
zsh% alias foo='echo help'
zsh% show=(stuff) foo bar
zsh: command not found: foo
So here's what I came up with; I return tokstr "show=" from the lexer for
ENVARRAY, and then strip off the '=' when parsing, as is done for ENVSTRING.
It's impossible to create an alias name containing an '=' (maybe that's a
bug, too?) so exalias() can't possibly succeed on "show=".
*** Src/lex.c.0 Thu Jul 18 19:15:13 1996
--- Src/lex.c Sun Jul 21 11:26:22 1996
***************
*** 853,858 ****
--- 853,859 ----
incmdpos && !bct && !brct) {
e = hgetc();
if (e == '(' && incmdpos) {
+ add('=');
*bptr = '\0';
return ENVARRAY;
}
*** Src/parse.c.0 Fri Jul 19 11:17:12 1996
--- Src/parse.c Sun Jul 21 11:29:49 1996
***************
*** 916,922 ****
v->type = PM_ARRAY;
incmdpos = 0;
! v->name = tokstr;
cmdpush(CS_ARRAY);
yylex();
v->arr = par_nl_wordlist();
--- 916,922 ----
v->type = PM_ARRAY;
incmdpos = 0;
! equalsplit(v->name = tokstr, &v->str);
cmdpush(CS_ARRAY);
yylex();
v->arr = par_nl_wordlist();
--
Bart Schaefer Brass Lantern Enterprises
http://www.well.com/user/barts http://www.nbn.com/people/lantern
New male in /home/schaefer:
>N 2 Justin William Schaefer Sat May 11 03:43 53/4040 "Happy Birthday"
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