#ifndef _DRAGONSTD_CALLBACK_H_ // include guard
#define _DRAGONSTD_CALLBACK_H_
+typedef void (*SingleCallback)(void *dat);
+typedef void (*Callback)(void *dat, void *arg);
typedef void *(*Transformer)(void *dat);
-typedef void (*Callback)(void *dat);
-typedef void (*Iterator)(void *dat, void *arg);
typedef int (*Comparator)(const void *dat, const void *key);
#endif // _DRAGONSTD_CALLBACK_H_