Add m-esr52 at 52.6.0

1 files changed, 288 insertions, 0 deletions

diff --git a/js/src/builtin/Reflect.cpp b/js/src/builtin/Reflect.cpp
new file mode 100644
index 0000000000..2f509a2268
--- /dev/null
+++ b/js/src/builtin/Reflect.cpp
@@ -0,0 +1,288 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * 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/. */
+
+#include "builtin/Reflect.h"
+
+#include "jsarray.h"
+#include "jscntxt.h"
+
+#include "vm/ArgumentsObject.h"
+#include "vm/Stack.h"
+
+#include "vm/Interpreter-inl.h"
+
+using namespace js;
+
+
+/*** Reflect methods *****************************************************************************/
+
+/* ES6 26.1.3 Reflect.defineProperty(target, propertyKey, attributes) */
+static bool
+Reflect_defineProperty(JSContext* cx, unsigned argc, Value* vp)
+{
+    CallArgs args = CallArgsFromVp(argc, vp);
+
+    // Step 1.
+    RootedObject obj(cx, NonNullObject(cx, args.get(0)));
+    if (!obj)
+        return false;
+
+    // Steps 2-3.
+    RootedValue propertyKey(cx, args.get(1));
+    RootedId key(cx);
+    if (!ToPropertyKey(cx, propertyKey, &key))
+        return false;
+
+    // Steps 4-5.
+    Rooted<PropertyDescriptor> desc(cx);
+    if (!ToPropertyDescriptor(cx, args.get(2), true, &desc))
+        return false;
+
+    // Step 6.
+    ObjectOpResult result;
+    if (!DefineProperty(cx, obj, key, desc, result))
+        return false;
+    args.rval().setBoolean(bool(result));
+    return true;
+}
+
+/* ES6 26.1.4 Reflect.deleteProperty (target, propertyKey) */
+static bool
+Reflect_deleteProperty(JSContext* cx, unsigned argc, Value* vp)
+{
+    CallArgs args = CallArgsFromVp(argc, vp);
+
+    // Step 1.
+    RootedObject target(cx, NonNullObject(cx, args.get(0)));
+    if (!target)
+        return false;
+
+    // Steps 2-3.
+    RootedValue propertyKey(cx, args.get(1));
+    RootedId key(cx);
+    if (!ToPropertyKey(cx, propertyKey, &key))
+        return false;
+
+    // Step 4.
+    ObjectOpResult result;
+    if (!DeleteProperty(cx, target, key, result))
+        return false;
+    args.rval().setBoolean(bool(result));
+    return true;
+}
+
+/* ES6 26.1.6 Reflect.get(target, propertyKey [, receiver]) */
+static bool
+Reflect_get(JSContext* cx, unsigned argc, Value* vp)
+{
+    CallArgs args = CallArgsFromVp(argc, vp);
+
+    // Step 1.
+    RootedObject obj(cx, NonNullObject(cx, args.get(0)));
+    if (!obj)
+        return false;
+
+    // Steps 2-3.
+    RootedValue propertyKey(cx, args.get(1));
+    RootedId key(cx);
+    if (!ToPropertyKey(cx, propertyKey, &key))
+        return false;
+
+    // Step 4.
+    RootedValue receiver(cx, args.length() > 2 ? args[2] : args.get(0));
+
+    // Step 5.
+    return GetProperty(cx, obj, receiver, key, args.rval());
+}
+
+/* ES6 26.1.7 Reflect.getOwnPropertyDescriptor(target, propertyKey) */
+static bool
+Reflect_getOwnPropertyDescriptor(JSContext* cx, unsigned argc, Value* vp)
+{
+    // Step 1.
+    CallArgs args = CallArgsFromVp(argc, vp);
+    if (!NonNullObject(cx, args.get(0)))
+        return false;
+
+    // The other steps are identical to ES6 draft rev 32 (2015 Feb 2) 19.1.2.6
+    // Object.getOwnPropertyDescriptor.
+    return js::obj_getOwnPropertyDescriptor(cx, argc, vp);
+}
+
+/* ES6 26.1.8 Reflect.getPrototypeOf(target) */
+bool
+js::Reflect_getPrototypeOf(JSContext* cx, unsigned argc, Value* vp)
+{
+    CallArgs args = CallArgsFromVp(argc, vp);
+
+    // Step 1.
+    RootedObject target(cx, NonNullObject(cx, args.get(0)));
+    if (!target)
+        return false;
+
+    // Step 2.
+    RootedObject proto(cx);
+    if (!GetPrototype(cx, target, &proto))
+        return false;
+    args.rval().setObjectOrNull(proto);
+    return true;
+}
+
+/* ES6 draft 26.1.10 Reflect.isExtensible(target) */
+bool
+js::Reflect_isExtensible(JSContext* cx, unsigned argc, Value* vp)
+{
+    CallArgs args = CallArgsFromVp(argc, vp);
+
+    // Step 1.
+    RootedObject target(cx, NonNullObject(cx, args.get(0)));
+    if (!target)
+        return false;
+
+    // Step 2.
+    bool extensible;
+    if (!IsExtensible(cx, target, &extensible))
+        return false;
+    args.rval().setBoolean(extensible);
+    return true;
+}
+
+/* ES6 26.1.11 Reflect.ownKeys(target) */
+static bool
+Reflect_ownKeys(JSContext* cx, unsigned argc, Value* vp)
+{
+    CallArgs args = CallArgsFromVp(argc, vp);
+
+    // Step 1.
+    if (!NonNullObject(cx, args.get(0)))
+        return false;
+
+    // Steps 2-4.
+    return GetOwnPropertyKeys(cx, args, JSITER_OWNONLY | JSITER_HIDDEN | JSITER_SYMBOLS);
+}
+
+/* ES6 26.1.12 Reflect.preventExtensions(target) */
+static bool
+Reflect_preventExtensions(JSContext* cx, unsigned argc, Value* vp)
+{
+    CallArgs args = CallArgsFromVp(argc, vp);
+
+    // Step 1.
+    RootedObject target(cx, NonNullObject(cx, args.get(0)));
+    if (!target)
+        return false;
+
+    // Step 2.
+    ObjectOpResult result;
+    if (!PreventExtensions(cx, target, result))
+        return false;
+    args.rval().setBoolean(bool(result));
+    return true;
+}
+
+/* ES6 26.1.13 Reflect.set(target, propertyKey, V [, receiver]) */
+static bool
+Reflect_set(JSContext* cx, unsigned argc, Value* vp)
+{
+    CallArgs args = CallArgsFromVp(argc, vp);
+
+    // Step 1.
+    RootedObject target(cx, NonNullObject(cx, args.get(0)));
+    if (!target)
+        return false;
+
+    // Steps 2-3.
+    RootedValue propertyKey(cx, args.get(1));
+    RootedId key(cx);
+    if (!ToPropertyKey(cx, propertyKey, &key))
+        return false;
+
+    // Step 4.
+    RootedValue receiver(cx, args.length() > 3 ? args[3] : args.get(0));
+
+    // Step 5.
+    ObjectOpResult result;
+    RootedValue value(cx, args.get(2));
+    if (!SetProperty(cx, target, key, value, receiver, result))
+        return false;
+    args.rval().setBoolean(bool(result));
+    return true;
+}
+
+/*
+ * ES6 26.1.3 Reflect.setPrototypeOf(target, proto)
+ *
+ * The specification is not quite similar enough to Object.setPrototypeOf to
+ * share code.
+ */
+static bool
+Reflect_setPrototypeOf(JSContext* cx, unsigned argc, Value* vp)
+{
+    CallArgs args = CallArgsFromVp(argc, vp);
+
+    // Step 1.
+    RootedObject obj(cx, NonNullObject(cx, args.get(0)));
+    if (!obj)
+        return false;
+
+    // Step 2.
+    if (!args.get(1).isObjectOrNull()) {
+        JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_NOT_EXPECTED_TYPE,
+                                  "Reflect.setPrototypeOf", "an object or null",
+                                  InformalValueTypeName(args.get(1)));
+        return false;
+    }
+    RootedObject proto(cx, args.get(1).toObjectOrNull());
+
+    // Step 4.
+    ObjectOpResult result;
+    if (!SetPrototype(cx, obj, proto, result))
+        return false;
+    args.rval().setBoolean(bool(result));
+    return true;
+}
+
+static const JSFunctionSpec methods[] = {
+    JS_SELF_HOSTED_FN("apply", "Reflect_apply", 3, 0),
+    JS_SELF_HOSTED_FN("construct", "Reflect_construct", 2, 0),
+    JS_FN("defineProperty", Reflect_defineProperty, 3, 0),
+    JS_FN("deleteProperty", Reflect_deleteProperty, 2, 0),
+    JS_FN("get", Reflect_get, 2, 0),
+    JS_FN("getOwnPropertyDescriptor", Reflect_getOwnPropertyDescriptor, 2, 0),
+    JS_FN("getPrototypeOf", Reflect_getPrototypeOf, 1, 0),
+    JS_SELF_HOSTED_FN("has", "Reflect_has", 2, 0),
+    JS_FN("isExtensible", Reflect_isExtensible, 1, 0),
+    JS_FN("ownKeys", Reflect_ownKeys, 1, 0),
+    JS_FN("preventExtensions", Reflect_preventExtensions, 1, 0),
+    JS_FN("set", Reflect_set, 3, 0),
+    JS_FN("setPrototypeOf", Reflect_setPrototypeOf, 2, 0),
+    JS_FS_END
+};
+
+
+/*** Setup **************************************************************************************/
+
+JSObject*
+js::InitReflect(JSContext* cx, HandleObject obj)
+{
+    RootedObject proto(cx, obj->as<GlobalObject>().getOrCreateObjectPrototype(cx));
+    if (!proto)
+        return nullptr;
+
+    RootedObject reflect(cx, NewObjectWithGivenProto<PlainObject>(cx, proto, SingletonObject));
+    if (!reflect)
+        return nullptr;
+    if (!JS_DefineFunctions(cx, reflect, methods))
+        return nullptr;
+
+    RootedValue value(cx, ObjectValue(*reflect));
+    if (!DefineProperty(cx, obj, cx->names().Reflect, value, nullptr, nullptr, JSPROP_RESOLVING))
+        return nullptr;
+
+    obj->as<GlobalObject>().setConstructor(JSProto_Reflect, value);
+
+    return reflect;
+}