#14340: Rename AND typecheck types before values -------------------------------------+------------------------------------- Reporter: ezyang | Owner: (none) Type: task | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 (Type checker) | Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- In a few cases, we get in trouble during renaming of values because we don't have access to information that would be computed during typechecking. Two examples of this: * https://ghc.haskell.org/trac/ghc/ticket/13905 - Here, we need to determine if a Name is a newtype constructor or data type constructor during renaming (desugaring of applicative do), which is not known until after typechecking * https://ghc.haskell.org/trac/ghc/ticket/12088 - Perhaps? We want to rename and typecheck instance declarations at the same time, since they can occur between the type declarations. One nit: you can't compute SCCs until you rename. But if you just rename ALL of the types at once, then SCC them, that should be fine. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14340 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler