1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
/* -*- 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: 10.1.6
ECMA Section: Activation Object
Description:
If the function object being invoked has an arguments property, let x be
the value of that property; the activation object is also given an internal
property [[OldArguments]] whose initial value is x; otherwise, an arguments
property is created for the function object but the activation object is
not given an [[OldArguments]] property. Next, arguments object described
below (the same one stored in the arguments property of the activation
object) is used as the new value of the arguments property of the function
object. This new value is installed even if the arguments property already
exists and has the ReadOnly attribute (as it will for native Function
objects). (These actions are taken to provide compatibility with a form of
program syntax that is now discouraged: to access the arguments object for
function f within the body of f by using the expression f.arguments.
The recommended way to access the arguments object for function f within
the body of f is simply to refer to the variable arguments.)
Author: christine@netscape.com
Date: 12 november 1997
*/
var SECTION = "10.1.6";
var VERSION = "ECMA_1";
startTest();
var TITLE = "Activation Object";
writeHeaderToLog( SECTION + " "+ TITLE);
var arguments = "FAILED!";
var ARG_STRING = "value of the argument property";
new TestCase( SECTION,
"(new TestObject(0,1,2,3,4,5)).length",
6,
(new TestObject(0,1,2,3,4,5)).length );
for ( i = 0; i < 6; i++ ) {
new TestCase( SECTION,
"(new TestObject(0,1,2,3,4,5))["+i+"]",
i,
(new TestObject(0,1,2,3,4,5))[i]);
}
// The current object already has an arguments property.
new TestCase( SECTION,
"(new AnotherTestObject(1,2,3)).arguments",
ARG_STRING,
(new AnotherTestObject(1,2,3)).arguments );
// The function invoked with [[Call]]
new TestCase( SECTION,
"TestFunction(1,2,3)",
ARG_STRING,
TestFunction() + '' );
test();
function Prototype() {
this.arguments = ARG_STRING;
}
function TestObject() {
this.__proto__ = new Prototype();
return arguments;
}
function AnotherTestObject() {
this.__proto__ = new Prototype();
return this;
}
function TestFunction() {
arguments = ARG_STRING;
return arguments;
}
function AnotherTestFunction() {
this.__proto__ = new Prototype();
return this;
}
|
