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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_nchildren;
struct _node *n_child;
} node;
extern DL_IMPORT(node *) PyNode_New(int type);
extern DL_IMPORT(int) PyNode_AddChild(node *n, int type,
char *str, int lineno);
extern DL_IMPORT(void) PyNode_Free(node *n);
/* 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)
/* Assert that the type of a node is what we expect */
#ifndef Py_DEBUG
#define REQ(n, type) { /*pass*/ ; }
#else
#define REQ(n, type) \
{ if (TYPE(n) != (type)) { \
fprintf(stderr, "FATAL: node type %d, required %d\n", \
TYPE(n), type); \
abort(); \
} }
#endif
extern DL_IMPORT(void) PyNode_ListTree(node *);
#ifdef __cplusplus
}
#endif
#endif /* !Py_NODE_H */
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