#ifndef Py_PARSER_H#define Py_PARSER_H#ifdef __cplusplusextern "C" {#endif  /* 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 */#ifdef PY_PARSER_REQUIRES_FUTURE_KEYWORD	unsigned long	p_flags;	/* see co_flags in Include/code.h */#endif} parser_state; parser_state *PyParser_New(grammar *g, int start);void PyParser_Delete(parser_state *ps);int PyParser_AddToken(parser_state *ps, int type, char *str, int lineno, int col_offset,                      int *expected_ret);void PyGrammar_AddAccelerators(grammar *g); #ifdef __cplusplus}#endif#endif /* !Py_PARSER_H */