Re: [GHC] #10874: Implement `:type-at`, `:all-types`, `:loc-at` in GHCi

#10874: Implement `:type-at`, `:all-types`, `:loc-at` in GHCi -------------------------------------+------------------------------------- Reporter: hvr | Owner: Type: feature request | Status: patch Priority: normal | Milestone: 8.0.1 Component: GHCi | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D1240 -------------------------------------+------------------------------------- Comment (by Herbert Valerio Riedel ): In [changeset:"fd3b845c01aa26b6e5cd12c00af59e5468e21b1b/ghc" fd3b845c/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="fd3b845c01aa26b6e5cd12c00af59e5468e21b1b" Make HasDynFlags more transformers friendly Ideally, we'd have the more general instance (MonadTrans t, Monad m, HasDynFlags m) => HasDynFlags (t m) where getDynFlags = lift getDynFlags definition. However, that one would overlap with the `HasDynFlags (GhcT m)` instance. Instead we define instances for a couple of common Monad transformers explicitly in order to avoid nasty overlapping instances. This is a preparatory refactoring for #10874 Reviewed By: austin Differential Revision: https://phabricator.haskell.org/D1581 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10874#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler