#1123: forall not hoisted properly
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Reporter: Ashley Yakeley <[EMAIL PROTECTED]> | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 6.6
Severity: normal | Resolution:
Keywords: | Difficulty: Unknown
Testcase: | Architecture: Unknown
Os: Unknown |
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Comment (by simonpj):
Good program. I believe this is another place where the quest for
impredicativity has led me to make GHC's behaviour worse for ordinary
predicative programs. This particular program is, I believe, rejected by
the rules of our paper "Boxy types: inference for ...".
It's very helpful having examples like these to guide thinking. I wonder
if anyone actually uses impredicativity. It carries heavier costs than
I'd anticipated.
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1123>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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