cc: don.cragun at sun.com ksh93-integration-discuss at opensolaris.org
pkchris at users.sourceforge.ne
Subject: Re: Re: [shell-discuss] [ksh93-integration-discuss] CR 6791838 Created
P3 shell/korn93 *ksh93* unset of a variablewhich is not set should return 0
--------
> Yes, and we have another syntax which is hard to memorize.
> Why can't we use [[ -v x ]] to test whether x is a variable, [[ -N x
> ]] to test whether x is a nameref and [[ -F x ]] to test whether x is
> a function?
>
> > I could detect that x is followed by a + and just
> > check for not set.
>
> How does this help with functions and name references?
>
> Jenny
> --
> Jennifer Pioch, Uni Frankfurt
>
>
-N is already used.
True if file exists and has been modified since it was last read.
There is no need for -F since you can use
typeset -f x
to test whether x is a function.
I will [[ -v x ]] and [[ -R x ]] to test whether x is a variable
or whether it is a name reference.
David Korn
dgk at research.att.com
