Re: memory management of all_visible_functions return

[Chet Ramey]

On 4/20/22 3:52 PM, Robert E. Griffith wrote:
> > > `Invisible' variables are variables that have been assigned attributes but
> > > not values, so they are technically unset.
>
> So what is the practical consequence of them not being visible?

The variable shows as unset when referenced.

Local variables have their own scoping issues that complicate things on
occasion, but it's easy to see with something like this:

myvar="hello"
foo()
{
   local myvar
   local b=isset

   echo "${myvar-unset}"
   echo "${b-unset}"
}
foo

You'll get

unset
isset

as output because `myvar' is unset.


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