Kind of like this?
> ruby -e "not 'a'"
-e:1: warning: string literal in condition

"Rando Christensen" <eyez / illuzionz.org> wrote in message
news:20040519102333.6105c047 / jenova.lol...
> On Thu, 20 May 2004 00:59:22 +0900
> Ben Giddings <bg-rubytalk / infofiend.com> wrote:
>
> > One of the few things that Perl still has that Ruby doesn't is this:
> >
> > use strict;
> >
> > $num = 3;
> > $num += 2;
> > if ($numb != 5) {
> >      print "Foo!!\n";
> > }
> > % perl perl.pl
> > Global symbol "$num" requires explicit package name at perl.pl line 3.
> > Global symbol "$num" requires explicit package name at perl.pl line 4.
> > Global symbol "$numb" requires explicit package name at perl.pl line
> > 5. Execution of perl.pl aborted due to compilation errors.
>
> A better example is that perl does exactly what you were asking for
> otherwise (behavior when -c and -v are both supplied to the ruby
> interpreter):
>
> jenova ~ % cat -n what.pl
>      1  $num = 3;
>      2  $num += 2;
>      3  if ($numb != 5) {
>      4       print "Foo!!\n";
>      5  }
> jenova ~ % perl -cw what.pl
> Name "main::numb" used only once: possible typo at what.pl line 3.
> what.pl syntax OK
> jenova ~ %
>
> -c catches compile issues, and -w adds in warning text.
>
>