add effectful version of atomicModifyMutVar#
something like
atomicEffectfulModifyMutVar# :: MutVar# s a -> ((# a, State# s #) -> (# State# s , a , b#)) -> State# s -> (#State# s, b #)
this isn't quite safely expressible currently without some unsafeCoercion highjinks that I'm not sure are robust
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.0.1 |
| Type | FeatureRequest |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |