[Haskell] type inference & instance extensions
ganesh.sittampalam at credit-suisse.com
Mon Jan 19 10:34:19 EST 2009
Lennart Augustsson wrote:
>> I had hoped that the code below (GHC 6.10+) would work, but it just
>> sends GHC into a loop when you actually try to typecheck (1,1). I
>> don't know if that's a bug in GHC or a misunderstanding on my part of
>> how the typechecking should work.
> A loop without turning on a flag to allow it must be a bug.
Sorry, I didn't mean to say "typecheck (1,1)". I meant to say
"evaluate (1,1)*(1,1)" - I had a suspicion that some kind of
infinite polymorphic recursion through the Num instance is
happening and accidentally turned that thought into a
completely different statement.
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