Suppress orphan instance warning per instance
In the same way we have overlapping/incoherent instance pragmas which can be applied on a per instance basis, it would be good to have a -fno-warn-orphan-instance pragma which can be applied on a per-instance basis.
Annoyingly, there is not an obvious syntax to use for this case, since SOP for a module with orphan instances is {-# GHC_OPTIONS -fno-warn-orphans #-}
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.11 |
| Type | FeatureRequest |
| TypeOfFailure | OtherFailure |
| Priority | low |
| Resolution | Unresolved |
| Component | Compiler (Type checker) |
| Test case | |
| Differential revisions | |
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