Re: [vile] testing for defined/set user variables

[Thomas Dickey]

On Mon, 8 Aug 2011, address@hidden wrote:

> Is there a function to test if a temporary variable is defined or
> contains a value?
>
> Ex:  ~if &defined mytmpvar
>
> If not how can it be simulated?

I'd make an expression with it, using the &error function.  For example
        ~if &not &error %mytmpvar
has the same sense as your example.

--
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net