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
|
<html><head><title>XLISP self</title>
<link rel="stylesheet" type="text/css" href="reference.css">
</head>
<body>
<a href="../start.htm">Nyquist / XLISP 2.0</a> -
<a href="../manual/contents.htm">Contents</a> |
<a href="../tutorials/tutorials.htm">Tutorials</a> |
<a href="../examples/examples.htm">Examples</a> |
<a href="reference-index.htm">Reference</a>
<hr>
<h1>self</h1>
<hr>
<p><table cellpadding="0" cellspacing="0" style="margin-left:10px"><tbody>
<tr valign="top">
<td><nobr>Type:</nobr></td>
<td><nobr> - </nobr></td>
<td width="100%"><nobr>symbol</nobr></td>
</tr>
<tr valign="top">
<td><nobr>Source:</nobr></td>
<td><nobr> - </nobr></td>
<td width="100%"><nobr>xlobj.c</nobr></td>
</tr>
</tbody></table></p>
<h2>Syntax</h2>
<dl>
<dt> self</dt>
</dl>
<h2>Description</h2>
<p>The 'self' symbol evaluates to the current object when used within a
message context.</p>
<h2>Examples</h2>
<pre class="example">
(setq my-class (send class :new '(state))) <font color="#008844">; create MY-CLASS with STATE</font>
(send my-class :answer :isnew '() <font color="#008844">; set up initialization</font>
'((setq state nil) SELF)) <font color="#008844">; returning SELF</font>
(send my-class :answer :set-it '(value) <font color="#008844">; create :SET-IT message</font>
'((setq state value)))
(setq my-obj (send my-class :new)) <font color="#008844">; create MY-OBJ of MY-CLASS</font>
(send my-obj :set-it 5) <font color="#008844">; STATE is set to 5</font>
</pre>
<p><b>Context:</b> 'self' does not exist except within the context of a
method and it's execution.</p>
<p><b>Note:</b> In the previous example, there is a 'self' in the line that
creates the ':set-it' message. What this does is to return the object as the
last operation when you do an <a href="keyword-isnew.htm">:isnew</a>.</p>
<p>See the
<a href="../manual/xlisp-man-010.htm#10-3">self</a>
symbol in the <nobr>XLISP 2.0</nobr> manual.</p>
<p><nobr> <a href="#top">Back to Top</nobr></a></p>
<hr>
<a href="../start.htm">Nyquist / XLISP 2.0</a> -
<a href="../manual/contents.htm">Contents</a> |
<a href="../tutorials/tutorials.htm">Tutorials</a> |
<a href="../examples/examples.htm">Examples</a> |
<a href="reference-index.htm">Reference</a>
</body></html>
|
