Add a minmaxheap-cmp infix subroutine

Author: titsuki

lib/Algorithm/MinMaxHeap/CmpOperator.pm6

@@ -0,0 +1,14 @@
+use v6;
+
+unit module Algorithm::MinMaxHeap::CmpOperator;
+
+use Algorithm::MinMaxHeap::Comparable;
+
+multi sub infix:<minmaxheap-cmp>(Cool $lhs, Cool $rhs) is export {
+    return $lhs cmp $rhs;
+}
+
+multi sub infix:<minmaxheap-cmp>(Algorithm::MinMaxHeap::Comparable $lhs, Algorithm::MinMaxHeap::Comparable $rhs) returns Order:D is export {
+    return $lhs.compare-to($rhs);
+}
+