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Java > Open Source Codes > Tparlist


1 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
2  * Copyright (C) 2001 Gerwin Klein <lsf@jflex.de> *
3  * Copyright (C) 2001 Bernhard Rumpe <rumpe@in.tum.de> *
4  * All rights reserved. *
5  * *
6  * This program is free software; you can redistribute it and/or modify *
7  * it under the terms of the GNU General Public License. See the file *
8  * COPYRIGHT for more information. *
9  * *
10  * This program is distributed in the hope that it will be useful, *
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13  * GNU General Public License for more details. *
14  * *
15  * You should have received a copy of the GNU General Public License along *
16  * with this program; if not, write to the Free Software Foundation, Inc., *
17  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
18  * *
19  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
20
21
22 /**
23  * AST node for a parameter list.
24  */
25 class Tparlist implements AST {
26   Tparlist parlist; // rest of the liste (optional null)
27 Tident ident; // identifier
28
29   public Tparlist(Tparlist p, Tident i) {
30     parlist=p;
31     ident=i;
32   }
33
34   public Tparlist(Tident i) {
35     parlist=null;
36     ident=i;
37   }
38
39   public String JavaDoc toString() {
40     if (parlist!=null)
41       return parlist+","+ident;
42     else
43       return ident.toString();
44   }
45
46   public void setSymtab(SymTab st, boolean isInput, int index) {
47     boolean isNew = st.enter(ident.toString(),
48                              new STEvar(ident.toString(), isInput, index));
49     
50     if (!isNew) Main.error("Variable "+ident+" defined twice!");
51     if (parlist!=null) parlist.setSymtab(st, isInput, index+1);
52   }
53 }
54
55
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