| /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * |
| * Copyright (C) 2001 Gerwin Klein <lsf@jflex.de> * |
| * Copyright (C) 2001 Bernhard Rumpe <rumpe@in.tum.de> * |
| * All rights reserved. * |
| * * |
| * This program is free software; you can redistribute it and/or modify * |
| * it under the terms of the GNU General Public License. See the file * |
| * COPYRIGHT for more information. * |
| * * |
| * This program 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 * |
| * GNU General Public License for more details. * |
| * * |
| * You should have received a copy of the GNU General Public License along * |
| * with this program; if not, write to the Free Software Foundation, Inc., * |
| * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * |
| * * |
| * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ |
| |
| |
| /** |
| * AST node for unary minus expressions. |
| */ |
| class Tuminus extends Texp implements AST { |
| |
| Texp exp; // the negated expression |
| |
| public Tuminus(Texp e) { |
| exp=e; |
| } |
| |
| public String toString() { |
| return "-"+exp; |
| } |
| |
| public void checkcontext(SymTab st) { |
| exp.checkcontext(st); |
| } |
| |
| public void prepInterp(SymTab st) { |
| exp.prepInterp(st); |
| } |
| |
| public int interpret(int[] in, int[] par) { |
| return -(exp.interpret(in,par)); |
| } |
| } |
| |