| /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * |
| * 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 a list of expressions. |
| * |
| * The interpretation of a list of expressions stores the |
| * results of the expressions in an array that can be used |
| * as parameter list for function calls. |
| */ |
| class Texplist implements AST { |
| Texplist explist; // next list element (optional null) |
| Texp exp; // expression of this list node |
| |
| public Texplist(Texplist p, Texp e) { |
| explist=p; |
| exp=e; |
| } |
| |
| public Texplist(Texp e) { |
| explist=null; |
| exp=e; |
| } |
| |
| public String toString() { |
| if (explist!=null) |
| return explist+","+exp; |
| else |
| return exp.toString(); |
| } |
| |
| public void checkcontext(SymTab st) { |
| if (explist!=null) |
| explist.checkcontext(st); |
| exp.checkcontext(st); // CoCo (DefFun,DefVar,Arity) |
| } // in expression |
| |
| public int length() { |
| if (explist!=null) |
| return 1+explist.length(); |
| else |
| return 1; |
| } |
| |
| public void prepInterp(SymTab st) { // set pointers and indices |
| exp.prepInterp(st); |
| if (explist!=null) explist.prepInterp(st); |
| } |
| |
| public void interpret(int[] in, int[] par, int[] res, int index) { |
| res[index] = exp.interpret(in,par); |
| if (explist!=null) explist.interpret(in,par,res,index+1); |
| } |
| } |
| |