stateref: Abstraction for things that work like IORef.

A collection of type-classes generalizing the read/write/modify operations for stateful variables provided by things like IORef, TVar, &c. Note that The interface has changed a bit from the 0.2.* version. "*Ref" functions are now called "*Reference" and new "*Ref" function exist with simpler signatures. The new Ref existential type provides a convenient monad-indexed reference type, and the HasRef class indicates monads for which there is a default reference type for every referent.

Modules

[Index]

Flags

Automatic Flags

Name	Description	Default
usestm	Include instances for STM types	Enabled
usetmvar	Include instances for TMVar (TMVar is not available in hugs' STM implementation). I have been unable to make this flag's value depend on whether or not you're running hugs, so if you are, you'll just have to change it manually. It'd sure be nice if there were either an explicit backtrack command in cabal or if 'buildable:false' would trigger a backtrack. Or if I could say "default: not(impl(hugs))" for this flag. Note that this is irrelevant at the moment because I broke Hugs+STM support by adding MonadIO m => ... instances. If anyone really wants me to fix it, speak up - but those instances are pretty darn convenient.	Enabled

Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info

Downloads

• stateref-0.3.tar.gz [browse] (Cabal source package)
• Package description (as included in the package)

Maintainer's Corner

Package maintainers

• JamesCook

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