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Re: RC_EXPAND_PARAM final patch
- X-seq: zsh-workers 3421
- From: <hzoli@xxxxxxxxxxxx> (Zoltan T. Hidvegi)
- To: schaefer@xxxxxxxxxxxxxxxx (Bart Schaefer)
- Subject: Re: RC_EXPAND_PARAM final patch
- Date: Mon, 4 Aug 1997 14:51:09 -0400 (EDT)
- Cc: zsh-workers@xxxxxxxxxxxxxxx (Zsh workers list)
- In-reply-to: <970804113944.ZM21422@xxxxxxxxxxxxxxxxxxxxxxx> from Bart Schaefer at "Aug 4, 97 11:39:43 am"
Bart Schaefer wrote:
> On Aug 4, 1:21pm, (Zoltan T. Hidvegi) wrote:
> } Subject: Re: RC_EXPAND_PARAM final patch
> }
> } belgium ~ % echo {$x,z}a
> } {x y,z}a
> }
> } It is probably not what you would expect, although ksh behaves this way.
>
> Actually, this is exactly what I'd expect. The $x is inside the { },
> so the entire value of $x should be treated as part of the brace
> expansion.
I do not understand you. Yes, I agree, that the entire value of $x should
be treated as part of the brace expansion, but this is not what happens
right now, as the result is two words, `{x' and `y,z}a', with braces
appearing in the result and not used for brace expansion. I thought that
this is not what you expect. What I would expect is 3 word result,
x ya za
> What, then, is the result of `echo {w,$x,z}a' ? I can't imagine that
> anyone would expect that to be the same as `{w,x} {y,z}a'. Who told
> zsh to put the extra } { in there?
Noone. The result will be 4 words,
wa x ya za
This is different from the result of {w,x} {y,z}a which is w x ya za. Or
do you have some more reasonable alternative?
> } But this would mean an other change: ${x}{a,b} will expand to 4 words,
> }
> } x ya x yb
>
> This is fine, assuming that {p,q}${x}{a,b} expands to 8 words
>
> px ya qx ya px yb qx yb
Almost, but the order is different:
px ya px yb qx ya qx yb
Zoltan
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