Re: RFC 263 (v1) Add null() keyword and fundamental data type

[Tom Christiansen]

>Currently, Perl has the concept of C<undef>, which means that a value is
>not defined. One thing it lacks, however, is the concept of C<null>,
>which means that a value is known to be unknown or not applicable. These
>are two separate concepts.

No, they aren't.

--tom