| /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * |
| * 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 an identifier |
| */ |
| class Tident extends Texp implements AST { |
| String name; |
| |
| public Tident(String s) { |
| name = s; |
| } |
| |
| public String toString() { |
| return name; |
| } |
| |
| public void checkcontext(SymTab st) { // CoCo (DefVar) |
| SymtabEntry ste = st.lookup(name); |
| |
| if (ste==null) |
| Main.error("variable not defined: "+name); |
| else if (ste.kind() != SymtabEntry.VAR) |
| Main.error("function used as variable: "+name); |
| } |
| |
| int index; // number of ident in environment |
| boolean is_input; // is it an input variable? |
| |
| public void prepInterp(SymTab st) { // set index for environment |
| STEvar ste = (STEvar)st.lookup(name); |
| index = ste.getIndex(); |
| is_input = ste.isInput(); |
| } |
| |
| public int interpret(int[] in, int[] par) { |
| if (is_input) |
| return(in[index]); |
| else |
| return(par[index]); |
| } |
| } |
| |
| |