On Wed, Sep 20, 2000 at 07:45:16PM -0000, Perl6 RFC Librarian wrote:
> "VARIABLE used only once: possible typo" should be replaced with
> warnings on uses of uninitialized variables (including lexicals).
> $x = 3
I don't understand, who's to say you didn't misspell $x? If you're only
using it once wouldn't that be likely? Who writes a program consisting of
only assignments to variables that are never used, and expects not to see
the "VARIABLE used only once: possible typo" warning?
> complains, but
>
> $x = 3; $x = 3
As it shouldn't; you've mentioned $x twice, which means you probably didn't
misspell it. That your mentioning twice in this manner is silly is beyond
perl's grasp.
> does not, nor does
>
> my $x = 3
I would say that this should complain just as $x = 3 would.
> Note that if you currently depend on lexical variables having
> undefined values, you would need to change C<my $x> to
> C<my $x = undef>. This is a good thing.
Whoa, are you saying that saying 'my $x' no longer means $x has the value
undef? What value does it have? How can this be a good thing?
Michael
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