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Re: param expansion with single-character special vars in the environmen

From: Chet Ramey
Subject: Re: param expansion with single-character special vars in the environment
Date: Wed, 4 May 2016 11:51:58 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:45.0) Gecko/20100101 Thunderbird/45.0

On 5/2/16 2:59 PM, Grisha Levit wrote:
> On Mon, May 2, 2016 at 2:48 PM, Chet Ramey <address@hidden
> <mailto:address@hidden>> wrote:
>     and this one throws away the nameref attribute:
>     typeset -n foo ; typeset -i foo ; foo=7*6 ; typeset -p foo
> I think it's important to note that the nameref attribute is thrown away at
> the `typeset -i foo' step, which makes some sense since `typeset -n -i'
> does not seem to be valid in ksh.

The issue I'm thinking about currently is whether or not to allow nameref
variables to have numeric (integer) values.  bash-4.3 didn't allow those
values to be expanded, but allowed them to be assigned.  It doesn't seem
harmful to change the error to assignment time.


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

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