finished the bulk of game

src/potion.h

@@ -2,10 +2,12 @@
 #define __POTION_H__
 
 #include <vector>
-#include "constants.h"
 #include "fraction.h"
 #include "display.h"
 
+enum potion_type : int;
+enum race : int;
+
 // IMPORTANT: pop all potions of duration == 0, and when entering a
 //  new level, pop all potions of duration == -1
 
@@ -32,10 +34,13 @@ public:
         int get_duration() const;
         position get_pos() const;
         void set_pos(const position &npos);
+        virtual const char *get_name() const = 0;
 
         virtual void print(display *out);
 };
 
 typedef std::vector<potion *> potion_list;
 
+potion *get_potion_at(const position &pos, potion_list &plist);
+
 #endif