repos
/
cl-unification
/ annotate_shade
summary
|
shortlog
|
log
|
tree
|
commit
|
commitdiff
|
headdiff
|
annotate
|
headblob
|
headfilediff
|
filehistory
normal
|
plain
|
shade
|
zebra
Initial revision
Annotate for file /docs/html/nthcdr-template-class.html
2004-11-17 mantoniotti
1
<html>
22:19:54 '
2
<head>
'
3
<title>CL Unification: Class NTHCDR-TEMPLATE</title>
'
4
<link rel="stylesheet" href="main.css">
'
5
</head>
'
6
'
7
<body marginheight="0" marginwidth="0" leftmargin="0" topmargin="0" bgcolor="#ffffff">
'
8
'
9
<table border="0" cellpadding="0" cellspacing="0" width="100%" height="100%" vspace="0" hspace="0">
'
10
<tr>
'
11
<td colspan="3">
'
12
<div class="header"
'
13
style="font-family:=Verdana,Arial,Helvetica; font-size: 18px; color: #41286f;">
'
14
<strong><i>CL Unification: Class NTHCDR-TEMPLATE</title></i></strong>
'
15
<div class="navigation">
'
16
<a href="index.html" class="navigation-link">Home</a>
'
17
| <a href="unification-package.html" class="navigation-link">Previous</a>
'
18
| <a href="index.html" class="navigation-link">Next</a>
'
19
| <a href="downloads.html" class="navigation-link">Downloads</a>
'
20
| <a href="links.html" class="navigation-link">Links</a>
'
21
</div>
'
22
</div>
'
23
<div class="black-line"><img src="images/shim.gif" height="1" width="1"></div>
'
24
<div class="middle-bar"><img src="images/shim.gif" height="5" width="1"></div>
'
25
<div class="black-line"><img src="images/shim.gif" height="1" width="1"></div>
'
26
</td>
'
27
</tr>
'
28
'
29
<tr height="100%">
'
30
<td height="100%"> </td>
'
31
<td valign="top" width="80%" height="100%">
'
32
'
33
<div class="content">
'
34
<div class="text" style="padding-top: 10px;">
'
35
'
36
<h1><i>Class</i> <strong>NTHCDR-TEMPLATE</strong></h1>
'
37
'
38
<h2>Package:</h2>
'
39
'
40
<p><code>COMMON-LISP.EXTENSIONS.DATA-AND-CONTROL-FLOW.UNIFICATION</code></p>
'
41
'
42
'
43
<h2>Class Precedence List:</h2>
'
44
'
45
<p>
'
46
NTHCDR-TEMPLATE, ELEMENT-TEMPLATE, EXPRESSION-TEMPLATE, TEMPLATE, STANDARD-OBJECT, T.
'
47
</p>
'
48
'
49
<h2>Known Subclasses:</h2>
'
50
'
51
<p>
'
52
None.
'
53
</p>
'
54
'
55
'
56
<h2>Slots:</h2>
'
57
'
58
<p>None.</p>
'
59
'
60
'
61
<h2>Description:</h2>
'
62
'
63
<p>The NTHCDR-TEMPLATE class denotes those object that are used
'
64
to unify against a particular CONS of a LIST.</p>
'
65
'
66
<h3>Template Syntax:</h3>
'
67
'
68
<p>
'
69
<pre>
'
70
#T(<b>nthcdr</b> <i>index</i> <i>item</i>)
'
71
</pre>
'
72
</p>
'
73
'
74
<p>The NTHCDR-TEMPLATE syntax denotes the CONS <i>item</i> at <i>index</i>
'
75
a LIST. A NTHCDR-TEMPLATE must
'
76
be unified against a LIST object. <i>item</i> is <em>unified</em>
'
77
against the element extracted from the LIST object at
'
78
<i>index</i> by the standard function NTHCDR.</p>
'
79
'
80
'
81
<h2>Examples:</h2>
'
82
'
83
<p>
'
84
<pre>
'
85
cl-prompt> (setf e (unify '(0 1 42 3 4 5) #T(<b>nthcdr</b> 2 ?x)))
'
86
#<ENVIRONMENT xxx>
'
87
'
88
cl-prompt> (find-variable-value '?x e)
'
89
(42 3 4 5)
'
90
'
91
cl-prompt> (setq e (unify '(0 1 42 3 4 5) #T(<b>nthcdr</b> 42 ?x)))
'
92
--> Error: index 42 out of bounds. <STRONG>FIX THIS</STRONG>
'
93
'
94
'
95
cl-prompt> (setq e (unify #(a s d) #T(<b>nthcdr</b> 1 ?x)))
'
96
--> Error: UNIFICATION-FAILURE
'
97
</pre>
'
98
</p>
'
99
'
100
'
101
<h2>Affected By:</h2>
'
102
'
103
<p>None.</p>
'
104
'
105
'
106
<h2>Exceptional Situations:</h2>
'
107
'
108
<p>Unifying an NTHCDR-TEMPLATE against a non-LIST object results in
'
109
an UNIFICATION-FAILURE error being signaled.</p>
'
110
'
111
'
112
<h2>See Also:</h2>
'
113
'
114
<p>UNIFY</p>
'
115
'
116
<h2>Notes:</h2>
'
117
'
118
<p>None.</p>
'
119
'
120
</td>
'
121
'
122
<!-- <td height="100%"> </td> -->
'
123
</tr>
'
124
'
125
<tr height="100%">
'
126
<td height="100%"> </td>
'
127
<td valign="top" width="80%" height="100%">
'
128
'
129
<div class="content">
'
130
<div class="text" style="padding-top: 10px;">
'
131
'
132
<h1>News</h1>
'
133
'
134
<p>News in chronological order, most recent on top.
'
135
</p>
'
136
'
137
<ul>
'
138
<li><strong>2004-06-11</strong><br>
'
139
Completed description.
'
140
</li>
'
141
'
142
</ul>
'
143
'
144
</div>
'
145
</div>
'
146
'
147
</td>
'
148
'
149
<td height="100%"> </td>
'
150
</tr>
'
151
'
152
'
153
'
154
'
155
<tr>
'
156
<td colspan="3" valign="bottom" align="right">
'
157
<div class="copyright">
'
158
© 2003-2004, Marco Antoniotti, all rights reserved.
'
159
</div>
'
160
</td>
'
161
</tr>
'
162
'
163
</table>
'
164
</body>
'
165
</html>
'
166
'
167
<!-- end of file -- expression-template-class.html -->