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/* 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; 
    int                 n_end_lineno;
    int                 n_end_col_offset;
} node; 
 
PyAPI_FUNC(node *) PyNode_New(int type); 
PyAPI_FUNC(int) PyNode_AddChild(node *n, int type, 
                                char *str, int lineno, int col_offset,
                                int end_lineno, int end_col_offset);
PyAPI_FUNC(void) PyNode_Free(node *n); 
#ifndef Py_LIMITED_API 
PyAPI_FUNC(Py_ssize_t) _PyNode_SizeOf(node *n); 
#endif 
 
/* Node access functions */ 
#define NCH(n)          ((n)->n_nchildren) 
 
#define CHILD(n, i)     (&(n)->n_child[i]) 
#define TYPE(n)         ((n)->n_type) 
#define STR(n)          ((n)->n_str) 
#define LINENO(n)       ((n)->n_lineno) 
 
/* 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 *); 
void _PyNode_FinalizeEndPos(node *n);  // helper also used in parsetok.c
 
#ifdef __cplusplus 
} 
#endif 
#endif /* !Py_NODE_H */