#11343: Unable to infer type when using DuplicateRecordFields -------------------------------------+------------------------------------- Reporter: mpickering | Owner: adamgundry Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 7.11 checker) | Resolution: | Keywords: ORF 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 adamgundry): At the moment we permit `(aThing :: A) { a = 5 }` because there is a special rule that looks for a type signature on the record expression. We could have a similar rule that looks for a variable of known type, which would permit `aThing { a = 5 }`. We'd yet need another rule for `(A 10) { a = 5 }`; that one looks less useful to me. None of this is doing true inference, though. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11343#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler