From: Bart Schaefer <schaefer@brasslantern.com>
To: zsh-workers@zsh.org
Subject: Re: Bug in alias expansion
Date: Sun, 15 Nov 2015 13:52:18 -0800 [thread overview]
Message-ID: <151115135218.ZM25449@torch.brasslantern.com> (raw)
In-Reply-To: <20151115200356.0f3a80a2@ntlworld.com>
On Nov 15, 8:03pm, Peter Stephenson wrote:
}
} On Fri, 13 Nov 2015 13:03:52 -0500
} Kynn Jones <kynnjo@gmail.com> wrote:
} > % typeset -A frobozz
} > % alias -g foo='echo xyz'
} > % frobozz[$(foo)]=9
} > zsh: not an identifier: frobozz[$(fooech9
}
} This is somewhere in the vicinity of parse_subscript(). That's called
} both from isident() and getindex(); I got as far as the case called from
} isident(), but it may be the second one gets called, too.
[...]
} I don't know why this works in other contexts.
When called from "typeset frobozz[$(foo)]=9" the ($foo) has been expanded
before parse_subscript() is called the first time [via isident()]:
Breakpoint 1, parse_subscript (s=0xb7d919e8 "xyz]", sub=1, endchar=93)
at ../../zsh-5.0/Src/lex.c:1620
When called as a plain assignment without the "typeset" keyword, $(foo)
has not yet been expanded:
Breakpoint 1, parse_subscript (s=0xb7d917f8 "$(foo)]", sub=1, endchar=93)
at ../../zsh-5.0/Src/lex.c:1620
This call is originating from addvars():
#0 parse_subscript (s=0xb7d91820 "$(foo)]", sub=1, endchar=93)
at ../../zsh-5.0/Src/lex.c:1620
#1 0x080b2334 in isident (s=0xb7d91818 "frobozz[$(foo)]")
at ../../zsh-5.0/Src/params.c:1078
#2 0x080b6660 in assignsparam (s=0xb7d91818 "frobozz[$(foo)]",
val=0x88bbdf0 "9", flags=0) at ../../zsh-5.0/Src/params.c:2741
#3 0x08078342 in addvars (state=0xbfe30f70, pc=0xb7d917a8, addflags=0)
at ../../zsh-5.0/Src/exec.c:2348
#4 0x08074dff in execsimple (state=0xbfe30f70)
at ../../zsh-5.0/Src/exec.c:1118
So the real question may be, how did we get as far as execsimple()
without having expanded all the aliases first?
next prev parent reply other threads:[~2015-11-15 21:52 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-13 18:03 Kynn Jones
2015-11-14 1:03 ` Bart Schaefer
2015-11-14 18:57 ` Kynn Jones
2015-11-14 19:03 ` Bart Schaefer
2015-11-14 19:19 ` Kynn Jones
2015-11-14 21:40 ` Bart Schaefer
2015-11-14 22:20 ` Kynn Jones
2015-11-15 20:03 ` Peter Stephenson
2015-11-15 21:52 ` Bart Schaefer [this message]
2015-11-15 22:26 ` Bart Schaefer
2015-11-15 22:48 ` Bart Schaefer
2015-11-16 0:50 ` Mikael Magnusson
2015-11-16 3:24 ` Bart Schaefer
2015-11-16 5:42 ` Mikael Magnusson
2015-11-18 10:42 ` Peter Stephenson
2015-11-18 14:13 ` Peter Stephenson
2015-11-18 15:52 ` Bart Schaefer
2015-11-18 16:14 ` Peter Stephenson
2015-11-18 18:09 ` Bart Schaefer
2015-11-17 17:29 ` Peter Stephenson
2015-11-18 4:55 ` Bart Schaefer
2015-11-18 10:30 ` Peter Stephenson
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