#2213: -Wall incorrectly warns "Defined but not used" for functions exported via
RULES
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Reporter: dons | Owner: dons
Type: bug | Status: assigned
Priority: normal | Milestone: 6.10 branch
Component: Compiler | Version: 6.8.2
Severity: normal | Resolution:
Keywords: | Difficulty: Unknown
Testcase: | Architecture: Unknown
Os: Unknown |
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Changes (by igloo):
* difficulty: => Unknown
* milestone: => 6.10 branch
Comment:
This is currently rather odd. You need one of `ScopedTypeVariables`,
`PolymorphicComponents`, `ExistentialQuantification`, `Rank2Types` and
`RankNTypes` enabled, as these all turn on lexing of `forall`. Really,
there ought to be a flag for rewrite rules instead (which also turns on
lexing of `forall`).
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2213#comment:2>
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