| /* -*- tab-width: 2; indent-tabs-mode: nil; js-indent-level: 2 -*- */ |
| /* 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/. */ |
| |
| |
| /** |
| File Name: 10.1.8 |
| ECMA Section: Arguments Object |
| Description: |
| |
| When control enters an execution context for declared function code, |
| anonymous code, or implementation-supplied code, an arguments object is |
| created and initialized as follows: |
| |
| The [[Prototype]] of the arguments object is to the original Object |
| prototype object, the one that is the initial value of Object.prototype |
| (section 15.2.3.1). |
| |
| A property is created with name callee and property attributes {DontEnum}. |
| The initial value of this property is the function object being executed. |
| This allows anonymous functions to be recursive. |
| |
| A property is created with name length and property attributes {DontEnum}. |
| The initial value of this property is the number of actual parameter values |
| supplied by the caller. |
| |
| For each non-negative integer, iarg, less than the value of the length |
| property, a property is created with name ToString(iarg) and property |
| attributes { DontEnum }. The initial value of this property is the value |
| of the corresponding actual parameter supplied by the caller. The first |
| actual parameter value corresponds to iarg = 0, the second to iarg = 1 and |
| so on. In the case when iarg is less than the number of formal parameters |
| for the function object, this property shares its value with the |
| corresponding property of the activation object. This means that changing |
| this property changes the corresponding property of the activation object |
| and vice versa. The value sharing mechanism depends on the implementation. |
| |
| Author: christine@netscape.com |
| Date: 12 november 1997 |
| */ |
| |
| var SECTION = "10.1.8"; |
| var VERSION = "ECMA_1"; |
| startTest(); |
| var TITLE = "Arguments Object"; |
| |
| writeHeaderToLog( SECTION + " "+ TITLE); |
| |
| var ARG_STRING = "value of the argument property"; |
| |
| new TestCase( SECTION, |
| "GetCallee()", |
| GetCallee, |
| GetCallee() ); |
| |
| var LIMIT = 100; |
| |
| for ( var i = 0, args = "" ; i < LIMIT; i++ ) { |
| args += String(i) + ( i+1 < LIMIT ? "," : "" ); |
| |
| } |
| |
| var LENGTH = eval( "GetLength("+ args +")" ); |
| |
| new TestCase( SECTION, |
| "GetLength("+args+")", |
| 100, |
| LENGTH ); |
| |
| var ARGUMENTS = eval( "GetArguments( " +args+")" ); |
| |
| for ( var i = 0; i < 100; i++ ) { |
| new TestCase( SECTION, |
| "GetArguments("+args+")["+i+"]", |
| i, |
| ARGUMENTS[i] ); |
| } |
| |
| test(); |
| |
| function TestFunction() { |
| var arg_proto = arguments.__proto__; |
| } |
| function GetCallee() { |
| var c = arguments.callee; |
| return c; |
| } |
| function GetArguments() { |
| var a = arguments; |
| return a; |
| } |
| function GetLength() { |
| var l = arguments.length; |
| return l; |
| } |
| |
| function AnotherTestFunction() { |
| this.__proto__ = new Prototype(); |
| return this; |
| } |