#5927: A type-level "implies" constraint on Constraints ----------------------------------------+----------------------------------- Reporter: illissius | Owner: Type: feature request | Status: new Priority: normal | Milestone: 7.6.2 Component: Compiler (Type checker) | Version: 7.4.1 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: None/Unknown Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ----------------------------------------+----------------------------------- Comment(by goldfire): There's not really built-in compiler support for these ideas, but have you seen the [http://hackage.haskell.org/package/constraints constraints] package? It allows you to manually enter and use implication relationships. This doesn't solve the fundamental problem here, but it may help with a workaround. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/5927#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler