support SpreadElement in destructuring - fixes #128

2014-11-07 20:46:02 +11:00
parent b3206d94a6
commit f8e8cd3979
3 changed files with 25 additions and 1 deletions
--- a/lib/6to5/transformers/destructuring.js
+++ b/lib/6to5/transformers/destructuring.js
@@ -40,7 +40,15 @@ var pushArrayPattern = function (kind, nodes, pattern, parentId) {
  _.each(pattern.elements, function (elem, i) {
    if (!elem) return;

-    var newPatternId = t.memberExpression(parentId, t.literal(i), true);
+    var newPatternId;
+
+    if (t.isSpreadElement(elem)) {
+      newPatternId = t.callExpression(t.memberExpression(parentId, t.identifier("slice")), [t.literal(i)]);
+      elem = elem.argument;
+    } else {
+      newPatternId = t.memberExpression(parentId, t.literal(i), true);
+    }
+
    push(kind, nodes, elem, newPatternId);
  });
 };