1/* stack.h - structed access to object stacks
2   Copyright (C) 1988 Free Software Foundation, Inc.
3   Contributed by Michael Tiemann (tiemann@cygnus.com).
4
5This program is free software; you can redistribute it and/or modify it
6under the terms of the GNU General Public License as published by the
7Free Software Foundation; either version 2, or (at your option) any
8later version.
9
10This program is distributed in the hope that it will be useful,
11but WITHOUT ANY WARRANTY; without even the implied warranty of
12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13GNU General Public License for more details.
14
15You should have received a copy of the GNU General Public License
16along with this program; if not, write to the Free Software
17Foundation, 59 Temple Place - Suite 330,
18Boston, MA 02111-1307, USA.  */
19
20/* Summary: this file contains additional structures that layer
21   on top of obstacks for GNU C++.  */
22
23/* Stack of data placed on obstacks.  */
24
25struct stack_level
26{
27  /* Pointer back to previous such level.  */
28  struct stack_level *prev;
29
30  /* Point to obstack we should return to.  */
31  struct obstack *obstack;
32
33  /* First place we start putting data.  */
34  tree *first;
35
36  /* Number of entries we can have from `first'.
37     Right now we are dumb: if we overflow, abort.  */
38  int limit;
39};
40
41struct stack_level *push_stack_level PROTO((struct obstack *, char *, int));
42struct stack_level *pop_stack_level PROTO((struct stack_level *));
43