DONT_ENUM, Representation::Tagged());
map->AppendDescriptor(&d);
}
+ // @@iterator method is added later.
map->set_function_with_prototype(true);
map->set_pre_allocated_property_fields(2);
CallbacksDescriptor d(factory->caller_string(), caller, attributes);
map->AppendDescriptor(&d);
}
+ // @@iterator method is added later.
map->set_function_with_prototype(true);
map->set_prototype(native_context()->object_function()->prototype());
INSTALL_NATIVE(Symbol, "symbolIterator", iterator_symbol);
INSTALL_NATIVE(Symbol, "symbolUnscopables", unscopables_symbol);
+ INSTALL_NATIVE(JSFunction, "ArrayValues", array_values_iterator);
INSTALL_NATIVE_MATH(abs)
INSTALL_NATIVE_MATH(acos)
native_context()->set_regexp_result_map(*initial_map);
}
+ // Add @@iterator method to the arguments object maps.
+ {
+ PropertyAttributes attribs = DONT_ENUM;
+ Handle<AccessorInfo> arguments_iterator =
+ Accessors::ArgumentsIteratorInfo(isolate(), attribs);
+ {
+ CallbacksDescriptor d(Handle<Name>(native_context()->iterator_symbol()),
+ arguments_iterator, attribs);
+ Handle<Map> map(native_context()->sloppy_arguments_map());
+ Map::EnsureDescriptorSlack(map, 1);
+ map->AppendDescriptor(&d);
+ }
+ {
+ CallbacksDescriptor d(Handle<Name>(native_context()->iterator_symbol()),
+ arguments_iterator, attribs);
+ Handle<Map> map(native_context()->aliased_arguments_map());
+ Map::EnsureDescriptorSlack(map, 1);
+ map->AppendDescriptor(&d);
+ }
+ {
+ CallbacksDescriptor d(Handle<Name>(native_context()->iterator_symbol()),
+ arguments_iterator, attribs);
+ Handle<Map> map(native_context()->strict_arguments_map());
+ Map::EnsureDescriptorSlack(map, 1);
+ map->AppendDescriptor(&d);
+ }
+ }
+
#ifdef VERIFY_HEAP
builtins->ObjectVerify();
#endif
--- /dev/null
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax
+
+
+// Note in general that "arguments.foo" and "var o = arguments; o.foo"
+// are treated differently by full-codegen, and so both cases need to be
+// tested.
+
+function TestDirectArgumentsIteratorProperty() {
+ assertTrue(arguments.hasOwnProperty(Symbol.iterator));
+ assertFalse(arguments.propertyIsEnumerable(Symbol.iterator));
+ var descriptor = Object.getOwnPropertyDescriptor(arguments, Symbol.iterator);
+ assertTrue(descriptor.writable);
+ assertFalse(descriptor.enumerable);
+ assertTrue(descriptor.configurable);
+ assertEquals(descriptor.value, [].values);
+ assertEquals(arguments[Symbol.iterator], [].values);
+}
+TestDirectArgumentsIteratorProperty();
+
+
+function TestIndirectArgumentsIteratorProperty() {
+ var o = arguments;
+ assertTrue(o.hasOwnProperty(Symbol.iterator));
+ assertFalse(o.propertyIsEnumerable(Symbol.iterator));
+ assertEquals(o[Symbol.iterator], [].values);
+}
+TestIndirectArgumentsIteratorProperty();
+
+
+function assertIteratorResult(value, done, result) {
+ assertEquals({value: value, done: done}, result);
+}
+
+
+function TestDirectValues1(a, b, c) {
+ var iterator = arguments[Symbol.iterator]();
+ assertIteratorResult(a, false, iterator.next());
+ assertIteratorResult(b, false, iterator.next());
+ assertIteratorResult(c, false, iterator.next());
+ assertIteratorResult(undefined, true, iterator.next());
+}
+TestDirectValues1(1, 2, 3);
+
+
+function TestIndirectValues1(a, b, c) {
+ var args = arguments;
+ var iterator = args[Symbol.iterator]();
+ assertIteratorResult(a, false, iterator.next());
+ assertIteratorResult(b, false, iterator.next());
+ assertIteratorResult(c, false, iterator.next());
+ assertIteratorResult(undefined, true, iterator.next());
+}
+TestIndirectValues1(1, 2, 3);
+
+
+function TestDirectValues2(a, b, c) {
+ var iterator = arguments[Symbol.iterator]();
+ assertIteratorResult(a, false, iterator.next());
+ assertIteratorResult(b, false, iterator.next());
+ assertIteratorResult(c, false, iterator.next());
+ assertIteratorResult(undefined, true, iterator.next());
+
+ arguments[3] = 4;
+ arguments.length = 4;
+ assertIteratorResult(undefined, true, iterator.next());
+}
+TestDirectValues2(1, 2, 3);
+
+
+function TestIndirectValues2(a, b, c) {
+ var args = arguments;
+ var iterator = args[Symbol.iterator]();
+ assertIteratorResult(a, false, iterator.next());
+ assertIteratorResult(b, false, iterator.next());
+ assertIteratorResult(c, false, iterator.next());
+ assertIteratorResult(undefined, true, iterator.next());
+
+ arguments[3] = 4;
+ arguments.length = 4;
+ assertIteratorResult(undefined, true, iterator.next());
+}
+TestIndirectValues2(1, 2, 3);
+
+
+function TestDirectValues3(a, b, c) {
+ var iterator = arguments[Symbol.iterator]();
+ assertIteratorResult(a, false, iterator.next());
+ assertIteratorResult(b, false, iterator.next());
+
+ arguments.length = 2;
+ assertIteratorResult(undefined, true, iterator.next());
+}
+TestDirectValues3(1, 2, 3);
+
+
+function TestIndirectValues3(a, b, c) {
+ var args = arguments;
+ var iterator = args[Symbol.iterator]();
+ assertIteratorResult(a, false, iterator.next());
+ assertIteratorResult(b, false, iterator.next());
+
+ arguments.length = 2;
+ assertIteratorResult(undefined, true, iterator.next());
+}
+TestIndirectValues3(1, 2, 3);
+
+
+function TestDirectValues4(a, b, c) {
+ var iterator = arguments[Symbol.iterator]();
+ assertIteratorResult(a, false, iterator.next());
+ assertIteratorResult(b, false, iterator.next());
+ assertIteratorResult(c, false, iterator.next());
+
+ arguments.length = 4;
+ assertIteratorResult(undefined, false, iterator.next());
+ assertIteratorResult(undefined, true, iterator.next());
+}
+TestDirectValues4(1, 2, 3);
+
+
+function TestIndirectValues4(a, b, c) {
+ var args = arguments;
+ var iterator = args[Symbol.iterator]();
+ assertIteratorResult(a, false, iterator.next());
+ assertIteratorResult(b, false, iterator.next());
+ assertIteratorResult(c, false, iterator.next());
+
+ arguments.length = 4;
+ assertIteratorResult(undefined, false, iterator.next());
+ assertIteratorResult(undefined, true, iterator.next());
+}
+TestIndirectValues4(1, 2, 3);
+
+
+function TestForOf() {
+ var i = 0;
+ for (var value of arguments) {
+ assertEquals(arguments[i++], value);
+ }
+
+ assertEquals(arguments.length, i);
+}
+TestForOf(1, 2, 3, 4, 5);
+
+
+function TestAssignmentToIterator() {
+ var i = 0;
+ arguments[Symbol.iterator] = [].entries;
+ for (var entry of arguments) {
+ assertEquals([i, arguments[i]], entry);
+ i++;
+ }
+
+ assertEquals(arguments.length, i);
+}
+TestAssignmentToIterator(1, 2, 3, 4, 5);
+
+
+function TestArgumentsMutation() {
+ var i = 0;
+ for (var x of arguments) {
+ assertEquals(arguments[i], x);
+ arguments[i+1] *= 2;
+ i++;
+ }
+
+ assertEquals(arguments.length, i);
+}
+TestArgumentsMutation(1, 2, 3, 4, 5);
+
+
+function TestSloppyArgumentsAliasing(a0, a1, a2, a3, a4) {
+ var i = 0;
+ for (var x of arguments) {
+ assertEquals(arguments[i], x);
+ a0 = a1; a1 = a2; a3 = a4;
+ i++;
+ }
+
+ assertEquals(arguments.length, i);
+}
+TestSloppyArgumentsAliasing(1, 2, 3, 4, 5);
+
+
+function TestStrictArgumentsAliasing(a0, a1, a2, a3, a4) {
+ "use strict";
+ var i = 0;
+ for (var x of arguments) {
+ a0 = a1; a1 = a2; a3 = a4;
+ assertEquals(arguments[i], x);
+ i++;
+ }
+
+ assertEquals(arguments.length, i);
+}
+TestStrictArgumentsAliasing(1, 2, 3, 4, 5);
+
+
+function TestArgumentsAsProto() {
+ "use strict";
+
+ var o = {__proto__:arguments};
+ assertSame([].values, o[Symbol.iterator]);
+ // Make o dict-mode.
+ %OptimizeObjectForAddingMultipleProperties(o, 0);
+ assertFalse(o.hasOwnProperty(Symbol.iterator));
+ assertSame([].values, o[Symbol.iterator]);
+ o[Symbol.iterator] = 10;
+ assertTrue(o.hasOwnProperty(Symbol.iterator));
+ assertEquals(10, o[Symbol.iterator]);
+ assertSame([].values, arguments[Symbol.iterator]);
+
+ // Frozen o.
+ o = Object.freeze({__proto__:arguments});
+ assertSame([].values, o[Symbol.iterator]);
+ assertFalse(o.hasOwnProperty(Symbol.iterator));
+ assertSame([].values, o[Symbol.iterator]);
+ // This should throw, but currently it doesn't, because
+ // ExecutableAccessorInfo callbacks don't see the current strict mode.
+ // See note in accessors.cc:SetPropertyOnInstanceIfInherited.
+ o[Symbol.iterator] = 10;
+ assertFalse(o.hasOwnProperty(Symbol.iterator));
+ assertEquals([].values, o[Symbol.iterator]);
+ assertSame([].values, arguments[Symbol.iterator]);
+}
+TestArgumentsAsProto();
projects / platform / upstream / v8.git / commitdiff