yup, you're right, you got to use functors or go home. Yeup, some folks did show the functors + modules \equiv type classes in some sense, for system F or a va

yup, you're right, you got to use functors or go home. Yeup, some folks did show the functors + modules \equiv type classes in some sense, for system F or a variant thereof. Theres also an oleg approach too I think.