1 files changed, 130 insertions, 0 deletions
diff --git a/js/src/builtin/Set.js b/js/src/builtin/Set.js
new file mode 100644
index 000000000..accc70120
--- /dev/null
+++ b/js/src/builtin/Set.js
@@ -0,0 +1,130 @@
+/* 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
+// 23.2.1.1 Set, steps 6-8
+function SetConstructorInit(iterable) {
+    var set = this;
+
+    // Step 6.a.
+    var adder = set.add;
+
+    // Step 6.b.
+    if (!IsCallable(adder))
+        ThrowTypeError(JSMSG_NOT_FUNCTION, typeof adder);
+
+    // Step 6.c.
+    var iterFn = iterable[std_iterator];
+    if (!IsCallable(iterFn))
+        ThrowTypeError(JSMSG_NOT_ITERABLE, DecompileArg(0, iterable));
+
+    var iter = callContentFunction(iterFn, iterable);
+    if (!IsObject(iter))
+        ThrowTypeError(JSMSG_NOT_NONNULL_OBJECT, typeof iter);
+
+    // Step 7 (not applicable).
+
+    // Step 8.
+    while (true) {
+        // Step 8.a.
+        var next = callContentFunction(iter.next, iter);
+        if (!IsObject(next))
+            ThrowTypeError(JSMSG_NOT_NONNULL_OBJECT, typeof next);
+
+        // Step 8.b.
+        if (next.done)
+            return;
+
+        // Step 8.c.
+        var nextValue = next.value;
+
+        // Steps 8.d-e.
+        callContentFunction(adder, set, nextValue);
+    }
+}
+
+/* ES6 20121122 draft 15.16.4.6. */
+function SetForEach(callbackfn, thisArg = undefined) {
+    /* Step 1-2. */
+    var S = this;
+    if (!IsObject(S))
+        ThrowTypeError(JSMSG_INCOMPATIBLE_PROTO, "Set", "forEach", typeof S);
+
+    /* Step 3-4. */
+    try {
+        callFunction(std_Set_has, S);
+    } catch (e) {
+        // has will throw on non-Set objects, throw our own error in that case.
+        ThrowTypeError(JSMSG_INCOMPATIBLE_PROTO, "Set", "forEach", typeof S);
+    }
+
+    /* Step 5-6. */
+    if (!IsCallable(callbackfn))
+        ThrowTypeError(JSMSG_NOT_FUNCTION, DecompileArg(0, callbackfn));
+
+    /* Step 7-8. */
+    var values = callFunction(std_Set_iterator, S);
+    while (true) {
+        var result = callFunction(SetIteratorNext, values);
+        if (result.done)
+            break;
+        var value = result.value;
+        callContentFunction(callbackfn, thisArg, value, value, S);
+    }
+}
+
+// ES6 final draft 23.2.2.2.
+function SetSpecies() {
+    // Step 1.
+    return this;
+}
+_SetCanonicalName(SetSpecies, "get [Symbol.species]");
+
+
+var setIteratorTemp = { setIterationResult : null };
+
+function SetIteratorNext() {
+    // Step 1.
+    var O = this;
+
+    // Steps 2-3.
+    if (!IsObject(O) || !IsSetIterator(O))
+        return callFunction(CallSetIteratorMethodIfWrapped, O, "SetIteratorNext");
+
+    // Steps 4-5 (implemented in _GetNextSetEntryForIterator).
+    // Steps 8-9 (omitted).
+
+    var setIterationResult = setIteratorTemp.setIterationResult;
+    if (!setIterationResult) {
+        setIterationResult = setIteratorTemp.setIterationResult = _CreateSetIterationResult();
+    }
+
+    var retVal = {value: undefined, done: true};
+
+    // Steps 10.a, 11.
+    var done = _GetNextSetEntryForIterator(O, setIterationResult);
+    if (!done) {
+        // Steps 10.b-c (omitted).
+
+        // Step 6.
+        var itemKind = UnsafeGetInt32FromReservedSlot(this, ITERATOR_SLOT_ITEM_KIND);
+
+        var result;
+        if (itemKind === ITEM_KIND_VALUE) {
+            // Step 10.d.i.
+            result = setIterationResult[0];
+        } else {
+            // Step 10.d.ii.
+            assert(itemKind === ITEM_KIND_KEY_AND_VALUE, itemKind);
+            result = [setIterationResult[0], setIterationResult[0]];
+        }
+
+        setIterationResult[0] = null;
+        retVal.value = result;
+        retVal.done = false;
+    }
+
+    // Steps 7, 10.d, 12.
+    return retVal;
+}