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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: Mon, 2 May 2016 11:55:03 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:45.0) Gecko/20100101 Thunderbird/45.0

On 4/27/16 8:41 AM, Grisha Levit wrote:
> On Wed, Apr 27, 2016 at 7:37 AM, Piotr Grzybowski <address@hidden
> <mailto:address@hidden>> 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    address@hidden    http://cnswww.cns.cwru.edu/~chet/



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