| /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * |
| * 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 if-then-else expressions |
| */ |
| class Tifthenelse extends Texp implements AST { |
| Tboolexp boolexp; // condition |
| Texp exp1, exp2; // then and else branch |
| |
| public Tifthenelse(Tboolexp b, Texp e1, Texp e2) { |
| boolexp=b; |
| exp1=e1; |
| exp2=e2; |
| } |
| |
| public String toString() { |
| return "if "+boolexp+" then "+exp1+" else "+exp2+" fi"; |
| } |
| |
| public void checkcontext(SymTab st) { |
| boolexp.checkcontext(st); |
| exp1.checkcontext(st); |
| exp2.checkcontext(st); |
| } |
| |
| public void prepInterp(SymTab st) { |
| boolexp.prepInterp(st); |
| exp1.prepInterp(st); |
| exp2.prepInterp(st); |
| } |
| |
| public int interpret(int[] in, int[] par) { |
| boolean b = boolexp.interpret(in,par); |
| if (b) |
| return exp1.interpret(in,par); |
| else |
| return exp2.interpret(in,par); |
| } |
| } |
| |