Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/js/src/builtin/WeakSet.js b/js/src/builtin/WeakSet.js
new file mode 100644
index 0000000000..13f6abd8f0
--- /dev/null
+++ b/js/src/builtin/WeakSet.js
@@ -0,0 +1,20 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// ES2017 draft rev 0e10c9f29fca1385980c08a7d5e7bb3eb775e2e4
+// 23.4.1.1 WeakSet, steps 6-8
+function WeakSetConstructorInit(iterable) {
+    var set = this;
+
+    // Step 6.a.
+    var adder = set.add;
+
+    // Step 6.b.
+    if (!IsCallable(adder))
+        ThrowTypeError(JSMSG_NOT_FUNCTION, typeof adder);
+
+    // Steps 6.c-8.
+    for (var nextValue of allowContentIter(iterable))
+        callContentFunction(adder, set, nextValue);
+}