Bind.Core_over_functor_via_bind
module Functor : Preface_specs.Functor.WITH_MAP
module Req : Preface_specs.Bind.WITH_BIND with type 'a t = 'a Functor.t
type 'a t = 'a Req.t
The type held by the Bind
.
join
remove one level of monadic structure, projecting its bound argument into the outer level.