Function pointers (interfaces)

library Test { //a function type with a single unit argument type unitFunc extends function(unit); //a function type with two integer arguments that returns boolean type evFunction extends function(integer,integer) -> boolean; function TortureUnit(unit u) { BJDebugMsg(GetUnitName(u)+" is being tortured!"); KillUnit(u); } function HealUnit(unit u) { SetWidgetLife(u, 1000); } /* This function calls F(u) if the unit is an ally or G(u) if the unit is an enemy the example sucks as it is much slower than an if-else but should be good to explain it... */ function AllyEnemyFunctionPicker(player p, unit u, unitFunc F, unitFunc G) { if (IsUnitAlly(u, p) ) { F.evaluate(u); } else { G.evaluate(u); } } function test(unit u) { // We are using the functions as arguments here... AllyEnemyFunctionPicker( Player(0), u, TortureUnit, HealUnit ); // will torture the unit if it is an ally, or heal it otherwise. } }