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Date: Fri, 8 Mar 2024 13:23:07 +0000
From: Stephane Chazelas <stephane@chazelas.org>
To: Zsh hackers list <zsh-workers@zsh.org>
Subject: namerefs to var[idx]
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$ f() { typeset -nu v=$1; echo ${v[1]}; }
$ a=abcd
$ f 'a[2,3]'
b

OK but:

$ f() { typeset -nu v=$1; echo $v[1]; }
$ f 'a[2,3]'
f: no matches found: bc[1]

It's amazing that these actually work:

$ f() { typeset -nu v=$1; v[1]=foo; }
$ f a
$ echo $a
foo2345
$ f 'a[6]'
$ echo $a
foo23foo5

This one not really:

$ a=12345
$ f 'a[2,3]'
$ echo $a
1foo45

In that one could expect the first character of the "23"
substring to be changed to "foo", but I can see that's asking
quite a lot.

-- 
Stephane