Copyright | Copyright (c) 2009-2017 David Sorokin <david.sorokin@gmail.com> |
---|---|

License | BSD3 |

Maintainer | David Sorokin <david.sorokin@gmail.com> |

Stability | experimental |

Safe Haskell | None |

Language | Haskell2010 |

Tested with: GHC 8.0.1

This module defines a plain and more fast version of an updatable and lazy reference that depends on the event queue but that doesn't supply with the signal notification.

# Documentation

class Monad m => MonadRef m where Source #

A monad within which we can create mutable references.

newRef :: a -> Simulation m (Ref m a) Source #

Create a new reference.

readRef :: Ref m a -> Event m a Source #

Read the value of a reference.

writeRef :: Ref m a -> a -> Event m () Source #

Write a new value into the reference.

modifyRef :: Ref m a -> (a -> a) -> Event m () Source #

Mutate the contents of the reference.

equalRef :: Ref m a -> Ref m a -> Bool Source #

Compare two references for equality.