Via_kleisli_composition.Req
include Preface_specs.Indexed_monad.WITH_RETURN_AND_KLEISLI_COMPOSITION
with type ('a, 'index) t := 'a t
include Preface_specs.Indexed_monad.WITH_RETURN
with type ('a, 'index) t := 'a t
val return : 'a -> 'a t
Lift a value into a t
.