Safe Haskell | None |
---|---|

Language | Haskell2010 |

A carrier for the `State`

effect. It evaluates its inner state strictly, which is the correct choice for the majority of use cases.

Note that the parameter order in `runState`

, `evalState`

, and `execState`

is reversed compared the equivalent functions provided by `transformers`

. This is an intentional decision made to enable the composition of effect handlers with `.`

without invoking `flip`

.

*Since: 1.0.0.0*

# Strict state carrier

*Since: 1.0.0.0*

StateC (s -> m (s, a)) |

#### Instances

MonadTrans (StateC s) Source # | |

Defined in Control.Carrier.State.Strict | |

Monad m => Monad (StateC s m) Source # | |

Functor m => Functor (StateC s m) Source # | |

MonadFix m => MonadFix (StateC s m) Source # | |

Defined in Control.Carrier.State.Strict | |

MonadFail m => MonadFail (StateC s m) Source # | |

Defined in Control.Carrier.State.Strict | |

Monad m => Applicative (StateC s m) Source # | |

Defined in Control.Carrier.State.Strict | |

MonadIO m => MonadIO (StateC s m) Source # | |

Defined in Control.Carrier.State.Strict | |

(Alternative m, Monad m) => Alternative (StateC s m) Source # | |

(Alternative m, Monad m) => MonadPlus (StateC s m) Source # | |

Algebra sig m => Algebra (State s :+: sig) (StateC s m) Source # | |

# State effect

module Control.Effect.State