ALife.Creatur.Counter

A simple counter which persists between runs.

Documentation

class Counter c where

Minimal complete definition

current, increment

Methods

current :: StateT c IO Int

increment :: StateT c IO ()

Instances

Counter PersistentCounter

Methods

current :: StateT PersistentCounter IO Int

increment :: StateT PersistentCounter IO ()

type PersistentCounter = Persistent Int

mkPersistentCounter :: FilePath -> PersistentCounter

Creates a counter that will store its value in the specified file.

Orphan instances

Clock PersistentCounter

Methods

currentTime :: StateT PersistentCounter IO Time

incTime :: StateT PersistentCounter IO ()