| /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * |
| * 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 function declarations. |
| * |
| * Also contains a reference to the symbol table of |
| * the paramaters and their arity. |
| */ |
| class Tdekl implements AST { |
| Tident ident; // identifier |
| Tparlist parlist; // liste of parameter |
| Texp exp; // function body |
| |
| public Tdekl(Tident i, Tparlist p, Texp e) { |
| parlist=p; |
| ident=i; |
| exp=e; |
| } |
| |
| public String toString() { |
| return(ident+"("+parlist+") = \n "+exp); |
| } |
| |
| SymTab params; // symbol table of the parameters |
| int arity; |
| |
| public void setSymtab(SymTab st) { |
| params = new SymTab(st); |
| parlist.setSymtab(params,false,0); |
| arity = params.size(); |
| |
| boolean isNew = st.enter(ident.toString(), |
| new STEfun(ident.toString(),this,arity)); |
| // CoCo (Fun) |
| if(!isNew) Main.error("funktion "+ident+" defined twice!"); |
| } |
| |
| public void printSymtabs() { |
| System.out.print("funktion "+ident.toString()+"\n"+params); |
| } |
| |
| public void checkcontext() { |
| exp.checkcontext(params); // CoCo (DefFun,DefVar,Arity) |
| } |
| |
| public void prepInterp(SymTab st) { // set pointers and indices |
| exp.prepInterp(params); |
| } |
| |
| public int interpret(int[] in, int[] par) { |
| return(exp.interpret(in,par)); |
| } |
| |
| public int arity() { return(arity); } |
| } |
| |