#6018: Injective type families
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Reporter: lunaris | Owner:
Type: feature request | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 7.4.1
Keywords: TypeFamilies, Injective | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: None/Unknown
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Changes (by simonpj):
* difficulty: => Unknown
Comment:
Some functions might be injective in one argument but not another. For
example:
{{{
F a b ~ F c d ===> a ~ c
but not b ~ d
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6018#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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