further support deriving instances Typeable1, Typeable2, etc
ghc-7.8.20140130 complains with
Not in scope: type constructor or class ‛Typeable2’
Perhaps you meant ‛Typeable’ (imported from Data.Typeable)changing Typeable2 to Typeable fixes it but is incompatible with ghc-7.6:
Expecting two more arguments to `Gr'
In the stand-alone deriving instance for `Typeable Gr'Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.8.1-rc1 |
| Type | Task |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | simonpj |
| Operating system | |
| Architecture |