extensible-effects-5.0.0.1: An Alternative to Monad Transformers

Safe Haskell	Safe
Language	Haskell2010

Control.Eff.Operational.Example

Description

Example usage of Control.Eff.Operational.

Synopsis

data Jail a where
- Print :: String -> Jail ()
- Scan :: Jail String
prog :: Member (Program Jail) r => Eff r ()
adventIO :: Lifted IO r => Jail a -> Eff r a
adventPure :: [Writer String, State [String]] <:: r => Jail a -> Eff r a

Documentation

data Jail a where Source #

Define data using GADTs.

Constructors

Print :: String -> Jail ()
Scan :: Jail String

prog :: Member (Program Jail) r => Eff r () Source #

adventIO :: Lifted IO r => Jail a -> Eff r a Source #

Then, implements interpreters from the data to effects.

adventPure :: [Writer String, State [String]] <:: r => Jail a -> Eff r a Source #