Add Applicative and Monoid instances for STM
instance Applicative STM where { pure = return; (<*>) = ap }
instance Monoid (STM a) where { mempty = retry; mappend = orElse }I don't know where these instances would go. Nor whether this is a libraries or GHC proposal.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 6.8.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | libraries/base |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | conal@conal.net |
| Operating system | Unknown |
| Architecture | Unknown |