There's also linear types, where you only give things capable of closing a resource a type that consumes a linear type. There's also monadic resources, which y

There's also linear types, where you only give things capable of closing a resource a type that consumes a linear type. There's also monadic resources, which you can view as a combination of RAII and what the author calls higher order functions. Finally there's also monadic regions (as distinct from resources), which take advantage of higher rank types.