1 <html> 2 <head> 3 <title>CL Unification: Class VECTOR-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 VECTOR-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>VECTOR-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 VECTOR-TEMPLATE, SEQUENCE-TEMPLATE, ARRAY-TEMPLATE, TYPE-TEMPLATE, TEMPLATE, STANDARD-OBJECT, T. 47 </p> 48 49 <h2>Known Subclasses:</h2> 50 51 <p> 52 STRING-TEMPLATE. 53 </p> 54 55 56 <h2>Slots:</h2> 57 58 <p>None.</p> 59 60 61 <h2>Description:</h2> 62 63 <p>The VECTOR-TEMPLATE class denotes those object that are used 64 to unify against a VECTOR.</p> 65 66 <h3>Template Syntax:</h3> 67 68 <p> 69 <pre> 70 #T(<b>vector</b> . <i><destructuring template lambda list></i>) 71 </pre> 72 </p> 73 74 <p> 75 <pre> 76 #T(<i><<strong>CL</strong> vector type specifier></i> . <i><destructuring template lambda list></i>) 77 </pre> 78 </p> 79 80 81 <p>The VECTOR-TEMPLATE syntax denotes a VECTOR object. A 82 VECTOR-TEMPLATE must be unified against an VECTOR object. The elements 83 of the array must be unified against the 84 <i><destructuring template lambda list></i> 85 86 87 <h2>Examples:</h2> 88 89 <p> 90 <pre> 91 cl-prompt> (setf e (unify #(0 1 42 3 4 5) #T(<b>vector</b> 0 1 ?x 3 4 5))) 92 #<ENVIRONMENT xxx> 93 94 cl-prompt> (find-variable-value '?x e) 95 42 96 97 cl-prompt> (setq e (unify #(0 1 42 3 4 5) #T(<b>vector</b> 0 1 "FOO" 3 4 5))) 98 --> Error: UNIFICATION-FAILURE 99 100 cl-prompt> (setq e (unify #("foo" "bar" 42)) #T(<b>vector</b> _ _ ?x)) 101 #<ENVIRONMENT xxx> 102 103 cl-prompt> (find-variable-value '?x e) 104 42 105 106 cl-prompt> (setq e (unify #("foo" "bar" 42) #T(<b>vector</b> _ &rest ?x))) 107 #<ENVIRONMENT xxx> 108 109 cl-prompt> (find-variable-value '?x e) 110 #("bar" 42) 111 112 cl-prompt> (setq e (unify #("foo" "bar" 42) #T((<b>vector</b> fixnum) _ &rest ?x))) 113 --> Error: UNIFICATION-FAILURE 114 </pre> 115 </p> 116 117 118 <h2>Affected By:</h2> 119 120 <p>None.</p> 121 122 123 <h2>Exceptional Situations:</h2> 124 125 <p>Unifying an VECTOR-TEMPLATE against a non-VECTOR object results in 126 an UNIFICATION-FAILURE error being signaled.</p> 127 128 129 <h2>See Also:</h2> 130 131 <p>UNIFY</p> 132 133 134 <h2>Notes:</h2> 135 136 <h3>ARRAY Structural Properties</h3> 137 138 <p>There is no way to "unify" against structural properties of 139 vectors like fill pointers and displacements.</p> 140 141 <h3>Current Implementation Note</h3> 142 143 <p>Type checking for templates like 144 <code>#T((<b>vector</b> fixnum) 1 2 3)</code> 145 is not yet implemented.</p> 146 147 </td> 148 149 <!-- <td height="100%"> </td> --> 150 </tr> 151 152 <tr height="100%"> 153 <td height="100%"> </td> 154 <td valign="top" width="80%" height="100%"> 155 156 <div class="content"> 157 <div class="text" style="padding-top: 10px;"> 158 159 <h1>News</h1> 160 161 <p>News in chronological order, most recent on top. 162 </p> 163 164 <ul> 165 <li><strong>2004-10-30</strong><br> 166 Completed description. 167 </li> 168 169 </ul> 170 171 </div> 172 </div> 173 174 </td> 175 176 <td height="100%"> </td> 177 </tr> 178 179 180 181 182 <tr> 183 <td colspan="3" valign="bottom" align="right"> 184 <div class="copyright"> 185 © 2003-2004, Marco Antoniotti, all rights reserved. 186 </div> 187 </td> 188 </tr> 189 190 </table> 191 </body> 192 </html> 193 194 <!-- end of file -- expression-template-class.html -->