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Modules/zaubertrank/old/Primitive.java

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+/*   
+Primitive.java
+ *    
+ *    Copyright (c) 2000, Ted Nelson and Tuomas Lukka
+ *    Copyright (c) 2000-2001, Benjamin Fallenstein
+ *
+ *    You may use and distribute under the terms of either the GNU Lesser
+ *    General Public License, either version 2 of the license or,
+ *    at your choice, any later version. Alternatively, you may use and
+ *    distribute under the terms of the XPL.
+ *
+ *    See the LICENSE.lgpl and LICENSE.xpl files for the specific terms of 
+ *    the licenses.
+ *
+ *    This software is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the README
+ *    file for more details.
+ *
+ */
+/*
+ * Written by Benjamin Fallenstein
+ */
+package org.zaubertrank;
+import org.gzigzag.*;
+
+/** A primitive for use in the zaubertrank.
+ */
+
+public abstract class Primitive {
+String rcsid = "$Id: Primitive.java,v 1.1 2001/04/02 20:29:05 bfallenstein Exp $";
+
+    // In subclasses, override one of the following two:
+    protected Object eval(Data params) { return null; }
+    public Object eval(Data params, ZZSpace space) {
+	return eval(params);
+    }
+
+    public abstract int args();
+
+}
+
+