complete redesign: use nodejs on server instead of php - documentation to be updated

nodejs/node_modules/stylus/lib/functions/operate.js

@@ -0,0 +1,18 @@
+var utils = require('../utils');
+
+/**
+ * Perform `op` on the `left` and `right` operands.
+ *
+ * @param {String} op
+ * @param {Node} left
+ * @param {Node} right
+ * @return {Node}
+ * @api public
+ */
+
+module.exports = function operate(op, left, right){
+  utils.assertType(op, 'string', 'op');
+  utils.assertPresent(left, 'left');
+  utils.assertPresent(right, 'right');
+  return left.operate(op.val, right);
+};