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

[Grisha Levit]

On Thu, Apr 28, 2016 at 3:14 PM, Piotr Grzybowski <narsil.pl@gmail.com> wrote:

 b. we can forbid
   # declare -n T
   when T is a readonly variable

This is the one that makes the most sense to me.  It shouldn't however be forbidden to do `declare -nr RO=foo' if RO is not already a readonly variable.

This feels similar to the restriction that forbids removing the readonly attribute from a readonly variable.