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

[Chet Ramey]

On 5/2/16 4:01 PM, Dan Douglas wrote:
> On Mon, May 2, 2016 at 1:59 PM, Grisha Levit <grishalevit@gmail.com> wrote:
>>
>> On Mon, May 2, 2016 at 2:48 PM, Chet Ramey <chet.ramey@case.edu> 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.
> 
> ksh93 stores integer variables as actual integers internally so
> there's no opportunity for storing the expression, and the nameref
> attribute just wouldn't make sense.

I know.  I'm surprised there's no warning.

-- 
``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/