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  • Glasgow Haskell Compiler
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  • #10150

Closed
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Opened Mar 09, 2015 by Edward Z. Yang@ezyangDeveloper

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 #-}

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Version 7.11
Type FeatureRequest
TypeOfFailure OtherFailure
Priority low
Resolution Unresolved
Component Compiler (Type checker)
Test case
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Reference: ghc/ghc#10150