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# Simple classes for testing.
use strict; use warnings;
sub Foo::new {
bless { foo => $_[1] }, $_[0];
}
sub Foo::xyz {
1;
}
sub Bar::new {
bless { bar => $_[1] }, $_[0];
}
sub Bar::xyz {
1;
}
{
package Bar;
use Scalar::Util qw(refaddr);
use overload '""' => \&str, eq => \&eq, ne => \≠
sub str { refaddr $_[0] }
sub eq {
my $d0 = defined $_[0]->{bar};
my $d1 = defined $_[1]->{bar};
$d0 && $d1 ? $_[0]->{bar} eq $_[1]->{bar} :
$d0 || $d0 ? 0 : 1;
}
sub ne {
my $d0 = defined $_[0]->{bar};
my $d1 = defined $_[1]->{bar};
$d0 && $d1 ? $_[0]->{bar} ne $_[1]->{bar} :
$d0 || $d0 ? 1 : 0;
}
}
1;
|
