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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright (C) 2001 Gerwin Klein <lsf@jflex.de> *
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* Copyright (C) 2001 Bernhard Rumpe <rumpe@in.tum.de> *
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* All rights reserved. *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License. See the file *
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* COPYRIGHT for more information. *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* You should have received a copy of the GNU General Public License along *
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* with this program; if not, write to the Free Software Foundation, Inc., *
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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* AST node for if-then-else expressions
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class Tifthenelse extends Texp implements AST {
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Tboolexp boolexp; // condition
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Texp exp1, exp2; // then and else branch
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public Tifthenelse(Tboolexp b, Texp e1, Texp e2) {
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public String toString() {
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return "if "+boolexp+" then "+exp1+" else "+exp2+" fi";
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public void checkcontext(SymTab st) {
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boolexp.checkcontext(st);
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exp1.checkcontext(st);
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exp2.checkcontext(st);
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public void prepInterp(SymTab st) {
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boolexp.prepInterp(st);
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public int interpret(int[] in, int[] par) {
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boolean b = boolexp.interpret(in,par);
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return exp1.interpret(in,par);
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return exp2.interpret(in,par);
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examples/interpreter/Tifthenelse.java
