text: #ifndef Py_PARSER_H
  #define Py_PARSER_H
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /***********************************************************
  Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
  The Netherlands.
  
                          All Rights Reserved
  
  Permission to use, copy, modify, and distribute this software and its
  documentation for any purpose and without fee is hereby granted,
  provided that the above copyright notice appear in all copies and that
  both that copyright notice and this permission notice appear in
  supporting documentation, and that the names of Stichting Mathematisch
  Centrum or CWI or Corporation for National Research Initiatives or
  CNRI not be used in advertising or publicity pertaining to
  distribution of the software without specific, written prior
  permission.
  
  While CWI is the initial source for this software, a modified version
  is made available by the Corporation for National Research Initiatives
  (CNRI) at the Internet address ftp://ftp.python.org.
  
  STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
  REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
  MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
  CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
  DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
  PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  PERFORMANCE OF THIS SOFTWARE.
  
  ******************************************************************/
  
  /* Parser interface */
  
  #define MAXSTACK 500
  
  typedef struct {
  	int		 s_state;	/* State in current DFA */
  	dfa		*s_dfa;		/* Current DFA */
  	struct _node	*s_parent;	/* Where to add next node */
  } stackentry;
  
  typedef struct {
  	stackentry	*s_top;		/* Top entry */
  	stackentry	 s_base[MAXSTACK];/* Array of stack entries */
  					/* NB The stack grows down */
  } stack;
  
  typedef struct {
  	stack	 	p_stack;	/* Stack of parser states */
  	grammar		*p_grammar;	/* Grammar to use */
  	node		*p_tree;	/* Top of parse tree */
  } parser_state;
  
  parser_state *PyParser_New Py_PROTO((grammar *g, int start));
  void PyParser_Delete Py_PROTO((parser_state *ps));
  int PyParser_AddToken
  	Py_PROTO((parser_state *ps, int type, char *str, int lineno));
  void PyGrammar_AddAccelerators Py_PROTO((grammar *g));
  
  #ifdef __cplusplus
  }
  #endif
  #endif /* !Py_PARSER_H */
  