/* Parse tree node interface */ #ifndef Py_NODE_H#define Py_NODE_H#ifdef __cplusplusextern "C" {#endif typedef struct _node {    short		n_type;    char		*n_str;    int			n_lineno;    int			n_col_offset;    int			n_nchildren;    struct _node	*n_child;} node; PyAPI_FUNC(node *) PyNode_New(int type);PyAPI_FUNC(int) PyNode_AddChild(node *n, int type,                                      char *str, int lineno, int col_offset);PyAPI_FUNC(void) PyNode_Free(node *n); /* Node access functions */#define NCH(n)		((n)->n_nchildren)	#define CHILD(n, i)	(&(n)->n_child[i])#define RCHILD(n, i)	(CHILD(n, NCH(n) + i))#define TYPE(n)		((n)->n_type)#define STR(n)		((n)->n_str) /* Assert that the type of a node is what we expect */#define REQ(n, type) assert(TYPE(n) == (type)) PyAPI_FUNC(void) PyNode_ListTree(node *); #ifdef __cplusplus}#endif#endif /* !Py_NODE_H */