Re: [GHC] #11098: PartialTypeSignatures mishandles type variables that begin with an underscore

#11098: PartialTypeSignatures mishandles type variables that begin with an underscore -------------------------------------+------------------------------------- Reporter: goldfire | Owner: msosn Type: bug | Status: closed Priority: normal | Milestone: 8.0.1 Component: Template Haskell | Version: 7.10.2 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: T11098, | NamedWildcardsAsTyVars, | NamedWildcardExplicitForall Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D1576 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Simon Peyton Jones ): In [changeset:"575a98e4d245c1e60526ed6d6711d96cea08e9d2/ghc" 575a98e4/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="575a98e4d245c1e60526ed6d6711d96cea08e9d2" Refactor named wildcards (again) Michal's work on #10982, #11098, refactored the handling of named wildcards by making them more like ordinary type variables. This patch takes the same idea to its logical conclusion, resulting in a much tidier, tighter implementation. Read Note [The wildcard story for types] in HsTypes. Changes: * Named wildcards are ordinary type variables, throughout * HsType no longer has a data constructor for named wildcards (was NamedWildCard in HsWildCardInfo). Named wildcards are simply HsTyVars * Similarly named wildcards disappear from Template Haskell * I refactored RnTypes to avoid polluting LocalRdrEnv with something as narrow as named wildcards. Instead the named wildcard set is carried in RnTyKiEnv. There is a submodule update for Haddock. }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11098#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler