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:  *  File Name:          function-001.js
michael@0:  *  Description:
michael@0:  *
michael@0:  * http://scopus.mcom.com/bugsplat/show_bug.cgi?id=324455
michael@0:  *
michael@0:  *  Earlier versions of JavaScript supported access to the arguments property
michael@0:  *  of the function object. This property held the arguments to the function.
michael@0:  *  function f() {
michael@0:  *      return f.arguments[0];    // deprecated
michael@0:  *  }
michael@0:  *  var x = f(3);    // x will be 3
michael@0:  *
michael@0:  * This feature is not a part of the final ECMA standard. Instead, scripts
michael@0:  * should simply use just "arguments":
michael@0:  *
michael@0:  * function f() {
michael@0:  *    return arguments[0];    // okay
michael@0:  * }
michael@0:  *
michael@0:  * var x = f(3);    // x will be 3
michael@0:  *
michael@0:  * Again, this feature was motivated by performance concerns. Access to the
michael@0:  * arguments property is not threadsafe, which is of particular concern in
michael@0:  * server environments. Also, the compiler can generate better code for
michael@0:  * functions because it can tell when the arguments are being accessed only by
michael@0:  * name and avoid setting up the arguments object.
michael@0:  *
michael@0:  *  Author:             christine@netscape.com
michael@0:  *  Date:               11 August 1998
michael@0:  */
michael@0: var SECTION = "function-001.js";
michael@0: var VERSION = "JS1_4";
michael@0: var TITLE   = "Accessing the arguments property of a function object";
michael@0: var BUGNUMBER="324455";
michael@0: startTest();
michael@0: writeHeaderToLog( SECTION + " "+ TITLE);
michael@0: 
michael@0: new TestCase(
michael@0:   SECTION,
michael@0:   "return function.arguments",
michael@0:   "P",
michael@0:   TestFunction_2("P", "A","S","S")[0] +"");
michael@0: 
michael@0: 
michael@0: new TestCase(
michael@0:   SECTION,
michael@0:   "return arguments",
michael@0:   "P",
michael@0:   TestFunction_1( "P", "A", "S", "S" )[0] +"");
michael@0: 
michael@0: new TestCase(
michael@0:   SECTION,
michael@0:   "return arguments when function contains an arguments property",
michael@0:   "PASS",
michael@0:   TestFunction_3( "P", "A", "S", "S" ) +"");
michael@0: 
michael@0: new TestCase(
michael@0:   SECTION,
michael@0:   "return function.arguments when function contains an arguments property",
michael@0:   "[object Arguments]",
michael@0:   TestFunction_4( "F", "A", "I", "L" ) +"");
michael@0: 
michael@0: test();
michael@0: 
michael@0: function TestFunction_1( a, b, c, d, e ) {
michael@0:   return arguments;
michael@0: }
michael@0: 
michael@0: function TestFunction_2( a, b, c, d, e ) {
michael@0:   return TestFunction_2.arguments;
michael@0: }
michael@0: 
michael@0: function TestFunction_3( a, b, c, d, e ) {
michael@0:   var arguments = "PASS";
michael@0:   return arguments;
michael@0: }
michael@0: 
michael@0: function TestFunction_4( a, b, c, d, e ) {
michael@0:   var arguments = "FAIL";
michael@0:   return TestFunction_4.arguments;
michael@0: }
michael@0: