Module Let_syntax.Let_syntax

val return : 'a -> ('a, 'i, 'i) X.t
val bind : ('a, 'i, 'j) X.t -> f:('a -> ('b, 'j, 'k) X.t) -> ('b, 'i, 'k) X.t
val map : ('a, 'i, 'j) X.t -> f:('a -> 'b) -> ('b, 'i, 'j) X.t
val both : ('a, 'i, 'j) X.t -> ('b, 'j, 'k) X.t -> ('a * 'b, 'i, 'k) X.t
module Open_on_rhs : sig ... end