Capabilities: Separate and contain effects of IO monad.
The capabilities library is an effort to make effects in Haskell more explicit by breaking the monolithic IO monad into smaller composable parts called capabilities: a use case might be an action that needs logging with current time but which should not be allowed any other IO. This exists as a pleasant middle ground between pure functions, the ST monad and the kitchen-sink IO providing a more fine-grained approach to effectful computations. Another benefit to this approach is security where a computation should only have access to resources requires to complete its job (principle of least privilege).
The implementation of the idea is based on Wouter Swierstra's
Functional Pearl Data types a la carte (Journal of Functional
Programming, 18(4):423-436, 2008,
http://dx.doi.org/10.1017/S0956796808006758) and uses the
compdata package for compositional data types.
|Dependencies||base (==4.5.*), compdata (==0.6.*), directory (==1.1.*), free (==3.4.*), unix (==2.5.*) [details]|
|Author||Baldur Blöndal, Daniel Schoepe|
|Source repo||head: git clone git://github.com/IcelandJack/Capabilties.git|
|Uploaded||by BaldurBlondal at Thu Aug 8 09:31:24 UTC 2013|
|Downloads||658 total (4 in the last 30 days)|
|Rating||(no votes yet) [estimated by rule of succession]|
|Status||Docs not available [build log]
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