1 <html> 2 <head> 3 <title>CL Unification: Class SUBSEQ-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 SUBSEQ-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>SUBSEQ-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 SUBSEQ-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 SUBSEQ-TEMPLATE class denotes those object that are used 64 to unify against a particular element of an ARRAY.</p> 65 66 <h3>Template Syntax:</h3> 67 68 <p> 69 <pre> 70 #T(<b>subseq</b> <i>start</i> <i>end</i> . <i><destructuring template lambda list></i>) 71 </pre> 72 </p> 73 74 75 <p>The SUBSEQ-TEMPLATE syntax is used to unify the elements of a 76 SEQUENCE starting from <i>start</i> and below <i>end</i>, against 77 the <i><destructuring template lambda list></i>.</p> 78 79 <p><i>start</i> and <i>end</i> must be supplied and must be valid 80 sequence indexes, i.e. most likely, FIXNUMs; however, <i>end</i> can 81 also be NIL, in which case the usual SUBSEQ semantics applies.</p> 82 83 84 85 <h2>Examples:</h2> 86 87 <p> 88 <pre> 89 cl-prompt> (setf e (unify #(0 1 42 3 4 5) #T(<b>subseq</b> 2 4 ?x ?y))) 90 #<ENVIRONMENT xxx> 91 92 cl-prompt> (find-variable-value '?x e) 93 42 94 T 95 96 cl-prompt> (find-variable-value '?y e) 97 3 98 T 99 100 cl-prompt> (setq e (unify #(0 1 42 3 4 5) #T(<b>subseq</b> 0 4 42 ?x))) 101 --> Error: UNIFICATION-FAILURE 102 103 104 cl-prompt> (setq e (unify "This is a string!" #T(<b>subseq</b> 4 nil &rest ?str))) 105 #<ENVIRONMENT xxx> 106 107 cl-prompt> (find-variable-value '?str e) 108 " is a string!" 109 </pre> 110 </p> 111 112 113 <h2>Affected By:</h2> 114 115 <p>None.</p> 116 117 118 <h2>Exceptional Situations:</h2> 119 120 <p>Unifying an SUBSEQ-TEMPLATE against a non-SEQUENCE object results in 121 an UNIFICATION-FAILURE error being signaled.</p> 122 123 124 <h2>See Also:</h2> 125 126 <p>UNIFY</p> 127 128 <h2>Notes:</h2> 129 130 <p>None.</p> 131 132 </td> 133 134 <!-- <td height="100%"> </td> --> 135 </tr> 136 137 <tr height="100%"> 138 <td height="100%"> </td> 139 <td valign="top" width="80%" height="100%"> 140 141 <div class="content"> 142 <div class="text" style="padding-top: 10px;"> 143 144 <h1>News</h1> 145 146 <p>News in chronological order, most recent on top. 147 </p> 148 149 <ul> 150 <li><strong>2004-06-11</strong><br> 151 Completed description. 152 </li> 153 154 </ul> 155 156 </div> 157 </div> 158 159 </td> 160 161 <td height="100%"> </td> 162 </tr> 163 164 165 166 167 <tr> 168 <td colspan="3" valign="bottom" align="right"> 169 <div class="copyright"> 170 © 2003-2004, Marco Antoniotti, all rights reserved. 171 </div> 172 </td> 173 </tr> 174 175 </table> 176 </body> 177 </html> 178 179 <!-- end of file -- expression-template-class.html -->