#2748: Fundep-laden code compiled and ran fine in 6.8, fails in 6.10
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Reporter: sedillard | Owner:
Type: bug | Status: closed
Priority: normal | Milestone:
Component: Compiler | Version: 6.10.1
Severity: normal | Resolution: invalid
Keywords: | Difficulty: Unknown
Testcase: | Os: Unknown/Multiple
Architecture: Unknown/Multiple |
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Comment (by sedillard):
Since you were so kind as to track down my type error, I've indulged your
curiosity (and my own) and rewritten it using type functions. I can't say
that it's any more readable, except for the use of type equality
constraints (~) which is exactly the thing I was wishing for. I didn't
know about them until I started reading up on type families, but they're
also really useful for fundep code. Maybe they should have their own
LANGUAGE pragma and -X option?
Anyway, thanks again.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2748#comment:5>
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