01: /*
02: * Jatha - a Common LISP-compatible LISP library in Java.
03: * Copyright (C) 1997-2005 Micheal Scott Hewett
04: *
05: * This library is free software; you can redistribute it and/or
06: * modify it under the terms of the GNU Lesser General Public
07: * License as published by the Free Software Foundation; either
08: * version 2.1 of the License, or (at your option) any later version.
09: *
10: * This library is distributed in the hope that it will be useful,
11: * but WITHOUT ANY WARRANTY; without even the implied warranty of
12: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13: * Lesser General Public License for more details.
14: *
15: * You should have received a copy of the GNU Lesser General Public
16: * License along with this library; if not, write to the Free Software
17: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18: *
19: *
20: * For further information, please contact Micheal Hewett at
21: * hewett@cs.stanford.edu
22: *
23: */
24:
25: package org.jatha.machine;
26:
27: import org.jatha.Jatha;
28: import org.jatha.dynatype.LispValue;
29:
30: // @date Sun Apr 27 1997
31: /**
32: * opSP_UNBIND unbinds a special variable.
33: * The variable name is the next value on the C register.
34: * @see SECDMachine
35: * @author Micheal S. Hewett hewett@cs.stanford.edu
36: */
37: class opSP_UNBIND extends SECDop {
38: public opSP_UNBIND(Jatha lisp) {
39: super (lisp, "SP_UNBIND");
40: }
41:
42: public void Execute(SECDMachine machine) {
43: machine.C.pop(); // Pop the SP_BIND instruction
44: LispValue sym = machine.C.pop(); // Pop the symbol name
45:
46: machine.special_unbind(sym);
47: }
48:
49: public LispValue grindef(LispValue code, int indentAmount) {
50: indent(indentAmount);
51: System.out.print(functionName);
52: indent(2);
53: code.second().internal_princ(System.out);
54:
55: f_lisp.NEWLINE.internal_princ(System.out);
56:
57: return code.cdr().cdr();
58: }
59: }
|