#15351: QuantifiedConstraints ignore FunctionalDependencies -------------------------------------+------------------------------------- Reporter: aaronvargo | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.5 checker) | Keywords: Resolution: | QuantifiedConstraints Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj):
How difficult would it be?
The logic for top-level instances is in `TcInteract.doTopReactDict`: see `try_fundep_improvement`. You want to do something similar for the local quantified constraints. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15351#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler