[GHC] #9178: improve orphan instance warning
GHC
ghc-devs at haskell.org
Fri Jun 6 17:18:50 UTC 2014
#9178: improve orphan instance warning
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Reporter: fphh | Owner:
Type: task | Status: patch
Priority: normal | Milestone:
Component: Compiler | Version: 7.8.2
Resolution: | Keywords:
Operating System: Unknown/Multiple | Architecture: Unknown/Multiple
Type of failure: None/Unknown | Difficulty: Unknown
Test Case: | Blocked By:
Blocking: | Related Tickets:
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Comment (by fphh):
This is how it looks like. What do you think?
{{{
T9178.hs:8:10: Warning:
Orphan instance: instance Show T9178_Type
To avoid this
move the instance declaration to the module of the class or of the
type, or
wrap the type with a newtype and declare the instance on the new
type.
}}}
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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9178#comment:2>
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