#6074: Instance inference failure with GADTs
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Reporter: goldfire | Owner:
Type: feature request | Status: new
Priority: normal | Milestone: 7.8.1
Component: Compiler (Type checker) | Version: 7.5
Keywords: GADTs | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: None/Unknown
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Comment(by simonpj):
No, types are erased at runtime. You can't match on them. That's what
GADTs are for: value-level things where matching conveys type information!
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6074#comment:7>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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