lib/less/js/lib/less/tree/dimension.js in less-2.0.8 vs lib/less/js/lib/less/tree/dimension.js in less-2.0.9

@@ -26,9 +26,24 @@
     // `101cm`.
     operate: function (op, other) {
         return new(tree.Dimension)
                   (tree.operate(op, this.value, other.value),
                   this.unit || other.unit);
+    },
+
+    // TODO: Perform unit conversion before comparing
+    compare: function (other) {
+        if (other instanceof tree.Dimension) {
+            if (other.value > this.value) {
+                return -1;
+            } else if (other.value < this.value) {
+                return 1;
+            } else {
+                return 0;
+            }
+        } else {
+            return -1;
+        }
     }
 };
 
 })(require('../tree'));