michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*
michael@0:  *
michael@0:  * Date:    13 Oct 2003
michael@0:  * SUMMARY: Make our f.caller property match IE's wrt f.apply and f.call
michael@0:  * See http://bugzilla.mozilla.org/show_bug.cgi?id=222029
michael@0:  *
michael@0:  * Below, when gg calls f via |f.call|, we have this call chain:
michael@0:  *
michael@0:  *          calls                                  calls
michael@0:  *   gg() --------->  Function.prototype.call()  --------->  f()
michael@0:  *
michael@0:  *
michael@0:  * The question this bug addresses is, "What should we say |f.caller| is?"
michael@0:  *
michael@0:  * Before this fix, SpiderMonkey said it was |Function.prototype.call|.
michael@0:  * After this fix, SpiderMonkey emulates IE and says |gg| instead.
michael@0:  *
michael@0:  */
michael@0: //-----------------------------------------------------------------------------
michael@0: var UBound = 0;
michael@0: var BUGNUMBER = 222029;
michael@0: var summary = "Make our f.caller property match IE's wrt f.apply and f.call";
michael@0: var status = '';
michael@0: var statusitems = [];
michael@0: var actual = '';
michael@0: var actualvalues = [];
michael@0: var expect= '';
michael@0: var expectedvalues = [];
michael@0: 
michael@0: 
michael@0: function f()
michael@0: {
michael@0:   return f.caller.p ;
michael@0: }
michael@0: 
michael@0: 
michael@0: /*
michael@0:  * Call |f| directly
michael@0:  */
michael@0: function g()
michael@0: {
michael@0:   return f();
michael@0: }
michael@0: g.p = "hello";
michael@0: 
michael@0: 
michael@0: /*
michael@0:  * Call |f| via |f.call|
michael@0:  */
michael@0: function gg()
michael@0: {
michael@0:   return f.call(this);
michael@0: }
michael@0: gg.p = "hello";
michael@0: 
michael@0: 
michael@0: /*
michael@0:  * Call |f| via |f.apply|
michael@0:  */
michael@0: function ggg()
michael@0: {
michael@0:   return f.apply(this);
michael@0: }
michael@0: ggg.p = "hello";
michael@0: 
michael@0: 
michael@0: /*
michael@0:  * Shadow |p| on |Function.prototype.call|, |Function.prototype.apply|.
michael@0:  * In Sections 2 and 3 below, we no longer expect to recover this value -
michael@0:  */
michael@0: Function.prototype.call.p = "goodbye";
michael@0: Function.prototype.apply.p = "goodbye";
michael@0: 
michael@0: 
michael@0: 
michael@0: status = inSection(1);
michael@0: actual = g();
michael@0: expect = "hello";
michael@0: addThis();
michael@0: 
michael@0: status = inSection(2);
michael@0: actual = gg();
michael@0: expect = "hello";
michael@0: addThis();
michael@0: 
michael@0: status = inSection(3);
michael@0: actual = ggg();
michael@0: expect = "hello";
michael@0: addThis();
michael@0: 
michael@0: 
michael@0: 
michael@0: 
michael@0: //-----------------------------------------------------------------------------
michael@0: test();
michael@0: //-----------------------------------------------------------------------------
michael@0: 
michael@0: 
michael@0: 
michael@0: function addThis()
michael@0: {
michael@0:   statusitems[UBound] = status;
michael@0:   actualvalues[UBound] = actual;
michael@0:   expectedvalues[UBound] = expect;
michael@0:   UBound++;
michael@0: }
michael@0: 
michael@0: 
michael@0: function test()
michael@0: {
michael@0:   enterFunc('test');
michael@0:   printBugNumber(BUGNUMBER);
michael@0:   printStatus(summary);
michael@0: 
michael@0:   for (var i=0; i<UBound; i++)
michael@0:   {
michael@0:     reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
michael@0:   }
michael@0: 
michael@0:   exitFunc ('test');
michael@0: }