Re: RFC 218 (v1) C<my Dog $spot> is just an assertion

On Thu, Sep 14, 2000 at 02:19:38PM +0100, Piers Cawley wrote:
> Michael G Schwern <[email protected]> writes:
> >     package Dog;
> >     use fields qw(this night up);
> > 
> >     my Dog $ph = [];
> >     $ph->{this} = "that";
> 
> That works? I thought you had to do:
> 
>       my Dog $self = fields::new('Dog');

Nope.  fields::new() basically just does C<bless
[\%{"$class\::FIELDS"}], $class>, but the current pseudohash
implementation doesn't care if something is an object or not.  It just
cares about either A) its type or B) what's in $ph->[0].  I don't know
if this is a good thing or a bad thing, but there's nothing on the
table to change it (yet).

    my Dog $ph = [];
    $ph->{this} = "that";

deparses at compile-time to:

    my Dog $ph = [];
    $ph->[$Dog::FIELDS{this}] = "that";  # actually the %FIELDS lookup is also
                                         # done at compile time, but I left
                                         # it in for illustration.

-- 

Michael G Schwern      http://www.pobox.com/~schwern/      [email protected]
Just Another Stupid Consultant                      Perl6 Kwalitee Ashuranse
Sometimes these hairstyles are exaggerated beyond the laws of physics
          - Unknown narrator speaking about Anime