managed

A monad for managed values

Version on this page:	1.0.9@rev:2
LTS Haskell 20.9:	1.0.9@rev:3
Stackage Nightly 2023-01-30:	1.0.9@rev:3
Latest on Hackage:	1.0.9@rev:3

See all snapshots managed appears in

BSD-3-Clause licensed by Gabriella Gonzalez

Maintained by GenuineGabriella@gmail.com

This version can be pinned in stack with:managed-1.0.9@sha256:47c8687e22c54787b35903adedbcd3b1fa1b7de23d393ac585cb005d9a88d0c2,1748

Module documentation for 1.0.9

Control
- Control.Monad
  - Control.Monad.Managed
    - Control.Monad.Managed.Safe

Depends on 2 packages(full list with versions):

base, transformers

Used by 1 package in nightly-2022-10-29(full list with versions):

turtle

In Haskell you very often acquire values using the with... idiom using functions of type (a -> IO r) -> IO r. This idiom forms a Monad, which is a special case of the ContT monad (from transformers) or the Codensity monad (from kan-extensions). The main purpose behind this package is to provide a restricted form of these monads specialized to this unusually common case.

The reason this package defines a specialized version of these types is to:

be more beginner-friendly,
simplify inferred types and error messages, and:
provide some additional type class instances that would otherwise be orphan instances