/* Parse tree node interface */

#ifndef Py_NODE_H

#define Py_NODE_H

#ifdef __cplusplus

extern "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 */