Creature class with attack interface

gistfile1.txt

creature:=class<abstract>:
    Stats:stats
    Attack:attack

stats:=class:
    Health:float
    Shield:float

attack:=interface():
    Attack():void

attack_melee:=class(attack):
    Attack<override>():void=
        Print("Melee Attack")

attack_ranged:=class(attack):
    Attack<override>():void=
        Print("Ranged Attack")

zergling:=class(creature):
    Attack<override>:attack_melee

hydralisk:=class(creature):
    Attack<override>:attack_ranged