package monadlib

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Signature

package monadlib

monadlib
- Library monadlib
  - Applicative
    
    Base
    
    BasePlus
    
    BaseLazyPlus
    
    Applicative
    
    Make
    
    Transform
  - LazyList
  - Monad
    
    Monoid
    
    BasePlus
    
    BaseLazyPlus
    
    Writer
    
    BaseCollectionM
    
    Monad
    
    MonadPlus
    
    LazyPlus
    
    Stream
    
    StreamC
    
    Make
    
    MakePlus
    
    MakeLazyPlus
    
    LazyM
    
    Lazyt
    
    List
    
    LazyListM
    
    Option
    
    State
    
    MakeWriter
    
    Listt
    
    Optiont
    
    Statet
    
    Writert
    
    MakeStream
    
    MakeStreamC
    
    CollectionOpt
    
    CollectionWriter
    
    CollectionState
  - TagTree
    
    Tree
    
    Make

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Module `Monad.MakeWriter`

A writer which combines the output values using some plus operation.

Parameters

module M : Monoid

Signature

include Writer with type t = M.t

type t = M.t

include BatInterfaces.Monad

type 'a m

val bind : 'a m -> ('a -> 'b m) -> 'b m

val return : 'a -> 'a m

val listen : 'a m -> (t * 'a) m

Listen to the written value.

val run : 'a m -> t * 'a

Run the writer, extracting both outputs.

val write : t -> unit m

Write a value.