For all this fixed dimension geometry stuff I use arrayrefs.
package Location;
use integer;
use constant X=>0;
use constant Y=>1;
sub new{
my($self,$x,$y)=@_;
bless[$x,$y],$self;
}
# this part can be obviously autoloaded
sub get_X{
my $self=shift;
return $self->[X];
}
sub get_Y{
my $self=shift;
return $self->[Y];
}
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