package monads

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package monads
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Make2(M) derives Monad.S2 from the Basic implementation

Parameters

module M : Basic2

Signature

val void : ('a, 'e) M.t -> (unit, 'e) M.t

void m computes m and discrards the result.

val sequence : (unit, 'e) M.t list -> (unit, 'e) M.t

sequence xs computes a sequence of computations xs in the left to right order.

val forever : ('a, 'e) M.t -> ('b, 'e) M.t

forever xs creates a computationt that never returns.

module Fn : sig ... end

Various function combinators lifted into the Kleisli category.

module Pair : sig ... end

The pair interface lifted into the monad.

module Triple : sig ... end

The triple interface lifted into a monad.

module Lift : sig ... end

Lifts functions into the monad.

module Exn : sig ... end

Interacting between monads and language exceptions

module Collection : sig ... end

Lifts collection interface into the monad.

module List : Collection.S with type 'a t := 'a list

The Monad.Collection.S2 interface for lists

module Seq : Collection.S with type 'a t := 'a Core_kernel.Sequence.t

The Monad.Collection.S2 interface for sequences

include Syntax.S2 with type ('a, 'e) t := ('a, 'e) M.t
val (>=>) : ('a -> ('b, 'e) M.t) -> ('b -> ('c, 'e) M.t) -> 'a -> ('c, 'e) M.t

f >=> g is fun x -> f x >>= g

val (!!) : 'a -> ('a, 'e) M.t

!!x is return x

val (!$) : ('a -> 'b) -> ('a, 'e) M.t -> ('b, 'e) M.t

!$f is Lift.unary f

val (!$$) : ('a -> 'b -> 'c) -> ('a, 'e) M.t -> ('b, 'e) M.t -> ('c, 'e) M.t

!$$f is Lift.binary f

val (!$$$) : ('a -> 'b -> 'c -> 'd) -> ('a, 'e) M.t -> ('b, 'e) M.t -> ('c, 'e) M.t -> ('d, 'e) M.t

!$$$f is Lift.ternary f

val (!$$$$) : ('a -> 'b -> 'c -> 'd -> 'e) -> ('a, 's) M.t -> ('b, 's) M.t -> ('c, 's) M.t -> ('d, 's) M.t -> ('e, 's) M.t

!$$$$f is Lift.quaternary f

val (!$$$$$) : ('a -> 'b -> 'c -> 'd -> 'e -> 'f) -> ('a, 's) M.t -> ('b, 's) M.t -> ('c, 's) M.t -> ('d, 's) M.t -> ('e, 's) M.t -> ('f, 's) M.t

!$$$$$f is Lift.quinary f

include Syntax.Let.S2 with type ('a, 'e) t := ('a, 'e) M.t
val let* : ('a, 'e) M.t -> ('a -> ('b, 'e) M.t) -> ('b, 'e) M.t

let* r = f x in b is f x >>= fun r -> b

val and* : ('a, 'e) M.t -> ('b, 'e) M.t -> ('a * 'b, 'e) M.t

monoidal product

val let+ : ('a, 'e) M.t -> ('a -> 'b) -> ('b, 'e) M.t

let+ r = f x in b is f x >>| fun r -> b

val and+ : ('a, 'e) M.t -> ('b, 'e) M.t -> ('a * 'b, 'e) M.t

monoidal product

include Core_kernel.Monad.S2 with type ('a, 'e) t := ('a, 'e) M.t
val (>>=) : ('a, 'e) M.t -> ('a -> ('b, 'e) M.t) -> ('b, 'e) M.t
val (>>|) : ('a, 'e) M.t -> ('a -> 'b) -> ('b, 'e) M.t
module Let_syntax : sig ... end
module Monad_infix : sig ... end

Same as Infix, except the monad type has two arguments. The second is always just passed through.

val bind : ('a, 'e) M.t -> f:('a -> ('b, 'e) M.t) -> ('b, 'e) M.t
val return : 'a -> ('a, _) M.t
val map : ('a, 'e) M.t -> f:('a -> 'b) -> ('b, 'e) M.t
val join : (('a, 'e) M.t, 'e) M.t -> ('a, 'e) M.t
val ignore_m : (_, 'e) M.t -> (unit, 'e) M.t
val all : ('a, 'e) M.t list -> ('a list, 'e) M.t
val all_unit : (unit, 'e) M.t list -> (unit, 'e) M.t
module Let : Syntax.Let.S2 with type ('a, 'e) t := ('a, 'e) M.t

Monadic Binding Operators.

module Syntax : Syntax.S2 with type ('a, 'e) t := ('a, 'e) M.t

Monadic operators, see Monad.Syntax.S2 for more.

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