#3447: Class restrictions on type instances
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Reporter: LysikovVV | Owner:
Type: feature request | Status: new
Priority: normal | Milestone: 6.14.1
Component: Compiler | Version: 6.10.4
Severity: normal | Resolution:
Keywords: | Difficulty: Unknown
Testcase: | Os: Unknown/Multiple
Architecture: Unknown/Multiple |
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Comment (by LysikovVV):
Replying to [comment:2 simonpj]:
> This is legal with `-XFlexibleContexts`. Perhaps you can see if that
serves your purpose?
{{{
Cycle in class declarations (via superclasses):
Bool.hs:(8,0)-(10,26): class (BoolT (NotT a)) => BoolT a where {
type family NotT a; }
}}}
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3447#comment:3>
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