#14832: QuantifiedConstraints: Adding to the context causes failure -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.5 Resolution: | Keywords: | QuantifiedConstraints wipT2893 Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj):
Is there hope for the user to guide this process
You want to write a ''term-level'' function that can be used a theorem in solving ''type-level'' constraints. This also came up, I think, in #14822. Of course, this is much what happens in many proof assistants. Perhaps we can learn from them. Personally, I don't see a direct way to do this; but perhaps others with a broader perspective, and a bit more time, might do so. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14832#comment:12 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler