preface.make
Via_bimap.Req
preface
preface.core
preface.specs
preface.stdlib
type ('a, 'b) t
The type held by the Bifunctor
Bifunctor
val bimap : ('a -> 'b) -> ('c -> 'd) -> ('a, 'c) t -> ('b, 'd) t
Mapping over both arguments at the same time.