}
+// ES5 section 15.2.3.2.
+function ObjectGetPrototypeOf(obj) {
+ if (!IS_OBJECT(obj) && !IS_FUNCTION(obj)) {
+ throw MakeTypeError("object_get_prototype_non_object", [obj]);
+ }
+ return obj.__proto__;
+}
+
+
// ES5 section 15.2.3.5.
function ObjectCreate(proto, properties) {
if (!IS_OBJECT(proto) && !IS_NULL(proto)) {
));
InstallFunctions($Object, DONT_ENUM, $Array(
"keys", ObjectKeys,
- "create", ObjectCreate
+ "create", ObjectCreate,
+ "getPrototypeOf", ObjectGetPrototypeOf
));
}
--- /dev/null
+// Copyright 2010 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following
+// disclaimer in the documentation and/or other materials provided
+// with the distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+function TryGetPrototypeOfNonObject(x) {
+ var caught = 0;
+ try {
+ Object.getPrototypeOf(x);
+ } catch (e) {
+ caught = e;
+ }
+
+ assertTrue(caught instanceof TypeError);
+};
+
+function GetPrototypeOfObject(x) {
+ assertDoesNotThrow(Object.getPrototypeOf(x));
+ assertNotNull(Object.getPrototypeOf(x));
+ assertEquals(Object.getPrototypeOf(x), x.__proto__);
+}
+
+function F(){};
+
+// Non object
+var x = 10;
+
+// Object
+var y = new F();
+
+// Make sure that TypeError exceptions are thrown when non-objects are passed
+// as argument
+TryGetPrototypeOfNonObject(0);
+TryGetPrototypeOfNonObject(null);
+TryGetPrototypeOfNonObject('Testing');
+TryGetPrototypeOfNonObject(x);
+
+// Make sure the real objects have this method and that it returns the
+// actual prototype object. Also test for Functions and RegExp.
+GetPrototypeOfObject(this);
+GetPrototypeOfObject(y);
+GetPrototypeOfObject({x:5});
+GetPrototypeOfObject(F);
+GetPrototypeOfObject(RegExp);
+