gistfile1.txt

class C { has $.value; method succ { !!! } };

my C $x .= new(value => 2);
my C $y .= new(value => 4);
my C $z .= new(value => 3);

multi sub infix:<cmp> (C:D $a, C:D $b) { 'debug'.say; $a.value cmp $b.value }

say ?( $x cmp $y );
say ?( $z ~~ $x .. $y );