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-rw-r--r--js/src/builtin/Reflect.js112
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diff --git a/js/src/builtin/Reflect.js b/js/src/builtin/Reflect.js
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+/* 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 a785b0832b071f505a694e1946182adeab84c972
+// 7.3.17 CreateListFromArrayLike (obj [ , elementTypes ] )
+function CreateListFromArrayLikeForArgs(obj) {
+ // Step 1 (not applicable).
+
+ // Step 2.
+ assert(IsObject(obj), "object must be passed to CreateListFromArrayLikeForArgs");
+
+ // Step 3.
+ var len = ToLength(obj.length);
+
+ // This version of CreateListFromArrayLike is only used for argument lists.
+ if (len > MAX_ARGS_LENGTH)
+ ThrowRangeError(JSMSG_TOO_MANY_ARGUMENTS);
+
+ // Steps 4-6.
+ var list = std_Array(len);
+ for (var i = 0; i < len; i++)
+ _DefineDataProperty(list, i, obj[i]);
+
+ // Step 7.
+ return list;
+}
+
+// ES2017 draft rev a785b0832b071f505a694e1946182adeab84c972
+// 26.1.1 Reflect.apply ( target, thisArgument, argumentsList )
+function Reflect_apply(target, thisArgument, argumentsList) {
+ // Step 1.
+ if (!IsCallable(target))
+ ThrowTypeError(JSMSG_NOT_FUNCTION, DecompileArg(0, target));
+
+ // Step 2.
+ if (!IsObject(argumentsList))
+ ThrowTypeError(JSMSG_NOT_NONNULL_OBJECT, DecompileArg(2, argumentsList));
+
+ // Steps 2-4.
+ return callFunction(std_Function_apply, target, thisArgument, argumentsList);
+}
+
+// ES2017 draft rev a785b0832b071f505a694e1946182adeab84c972
+// 26.1.2 Reflect.construct ( target, argumentsList [ , newTarget ] )
+function Reflect_construct(target, argumentsList/*, newTarget*/) {
+ // Step 1.
+ if (!IsConstructor(target))
+ ThrowTypeError(JSMSG_NOT_CONSTRUCTOR, DecompileArg(0, target));
+
+ // Steps 2-3.
+ var newTarget;
+ if (arguments.length > 2) {
+ newTarget = arguments[2];
+ if (!IsConstructor(newTarget))
+ ThrowTypeError(JSMSG_NOT_CONSTRUCTOR, DecompileArg(2, newTarget));
+ } else {
+ newTarget = target;
+ }
+
+ // Step 4.
+ if (!IsObject(argumentsList))
+ ThrowTypeError(JSMSG_NOT_NONNULL_OBJECT, DecompileArg(1, argumentsList));
+
+ // Fast path when we can avoid calling CreateListFromArrayLikeForArgs().
+ var args = (IsPackedArray(argumentsList) && argumentsList.length <= MAX_ARGS_LENGTH)
+ ? argumentsList
+ : CreateListFromArrayLikeForArgs(argumentsList);
+
+ // Step 5.
+ switch (args.length) {
+ case 0:
+ return constructContentFunction(target, newTarget);
+ case 1:
+ return constructContentFunction(target, newTarget, SPREAD(args, 1));
+ case 2:
+ return constructContentFunction(target, newTarget, SPREAD(args, 2));
+ case 3:
+ return constructContentFunction(target, newTarget, SPREAD(args, 3));
+ case 4:
+ return constructContentFunction(target, newTarget, SPREAD(args, 4));
+ case 5:
+ return constructContentFunction(target, newTarget, SPREAD(args, 5));
+ case 6:
+ return constructContentFunction(target, newTarget, SPREAD(args, 6));
+ case 7:
+ return constructContentFunction(target, newTarget, SPREAD(args, 7));
+ case 8:
+ return constructContentFunction(target, newTarget, SPREAD(args, 8));
+ case 9:
+ return constructContentFunction(target, newTarget, SPREAD(args, 9));
+ case 10:
+ return constructContentFunction(target, newTarget, SPREAD(args, 10));
+ case 11:
+ return constructContentFunction(target, newTarget, SPREAD(args, 11));
+ case 12:
+ return constructContentFunction(target, newTarget, SPREAD(args, 12));
+ default:
+ return _ConstructFunction(target, newTarget, args);
+ }
+}
+
+// ES2017 draft rev a785b0832b071f505a694e1946182adeab84c972
+// 26.1.8 Reflect.has ( target, propertyKey )
+function Reflect_has(target, propertyKey) {
+ // Step 1.
+ if (!IsObject(target))
+ ThrowTypeError(JSMSG_NOT_NONNULL_OBJECT, DecompileArg(0, target));
+
+ // Steps 2-3 are identical to the runtime semantics of the "in" operator.
+ return propertyKey in target;
+}