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Re: bash 5.0 nested array subscript arithmetic expansion error

From: Chet Ramey
Subject: Re: bash 5.0 nested array subscript arithmetic expansion error
Date: Wed, 17 Oct 2018 10:05:41 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:52.0) Gecko/20100101 Thunderbird/52.9.1

On 10/16/18 10:10 AM, Dan Douglas wrote:
> On Mon, Aug 27, 2018 at 8:12 PM Chet Ramey <address@hidden> wrote:
>> On 8/27/18 12:25 PM, Grisha Levit wrote:
>>> This used to work:
>>> bash-4.4$ a=0
>>> bash-4.4$ echo $(( a[a[0]] ))
>>> 0
>>> bash-4.4$ echo ${a[a[a[0]]]}
>>> 0
> Just curious, did you decide what to do with this?

Arithmetic subscript expansion (indexed arrays) will work the same as it
did in bash-4.4.

> If it were a temporary bodge I'd say add a shopt option to disable
> recursive subscript processing in the event someone depends upon weird
> strings in associative arrays. It often isn't a requirement. Too bad
> adding this would probably mean supporting it forever.

You know this has already been done, right?

``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    address@hidden    http://tiswww.cwru.edu/~chet/

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