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

[Chet Ramey]

On 4/27/16 8:41 AM, Grisha Levit wrote:
> On Wed, Apr 27, 2016 at 7:37 AM, Piotr Grzybowski <narsil.pl@gmail.com
> <mailto:narsil.pl@gmail.com>> wrote:
> 
>      It seems to me that creating the reference should be allowed, but the
>     access to the referenced variable should honor its attributes.
> 
> Once you convert the variable to a reference, you can control its value by
> modifying the value of a different variable with the name that corresponds
> to the value of the readonly variable, so “access to the referenced
> variable should honor its attributes” probably won’t do much (If I
> understand your suggestion correctly).

I agree; `declare' should not allow attempts to add the nameref attribute
to an existing readonly variable.  I will make this change before bash-4.4
is released.

Chet

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