atl-15322.1: Arrow Transformer Library

Control.Arrow.Writer

Documentation

newtype WriterT w r a b Source

Constructors

WriterT 

Fields

runWriterT :: r a (b, w)
 

Instances

(Monoid w, Arrow r) => ArrowWriter w (WriterT w r) 
Monoid w => ArrowTransformer (WriterT w) 
(Monoid w, Arrow r) => Arrow (WriterT w r) 
(Monoid w, ArrowApply r) => ArrowApply (WriterT w r) 
(Monoid w, Arrow r) => Category (WriterT w r)