OCaml functors are not the same thing as Haskell functors — in OCaml they refer to mappings from modules to modules.<p><a href="https:&#x2F;&#x2F;realworldocaml.org&#x2F;v1&#x2F;en&#x2F;html&#x2F;functors.html" rel="nofollow">https:&#x2F;&#x2F;realworldocaml.org&#x2F;v1&#x2F;en&#x2F;html&#x2F;functors.html</a>