In the following AUTOLOAD subroutine contained in an OO module: 
sub AUTOLOAD {
    my ($self) = @_;
    $AUTOLOAD =~ /.*::get(_\w+)/
        or croak "No such method: $AUTOLOAD";
    $self->_accessible($1)
        or croak "No such attribute: $1";
    $self->{_read_count}++;
    return $self->{$1}
}

[download]
...I'm wondering why the "_accessible" subroutine needs to be called with $self-> in front of it. In other words, why does plain old
_accessible($1) or croak...
yield an "unitialized value" warning and then croak the program even with a valid public method? Here's the block containing the "_accessible" subroutine: 
{
    my %_attrs =
          (  _name    => undef,
             _artist  => undef,
      );
    sub _accessible { exists $_attrs{$_[1]}}
}

[download]
Doesn't the %attrs hash stay alive after leaving the scope because it is referenced in the _accessible subroutine? And what exactly does putting the $self-> in front of the subroutine do differently to prevent the error? Thanks.

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In reply to Need help understanding variable scope in modules by nysus

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