#11051: GHCi with +t option set shows type representations -------------------------------------+------------------------------------- Reporter: bgamari | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.11 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect result | Unknown/Multiple at runtime | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Description changed by bgamari: Old description:
hvr reported this morning that defining a data type in GHCi with the show types (`:set +t`) option set results in additional unexpected output. For instance,
{{{ $ inplace/bin/ghc-stage2 --interactive GHCi, version 7.11.20151101: http://www.haskell.org/ghc/ :? for help Prelude> :set +t Prelude> data Hi $tcHi :: TyCon $trModule :: Module data Hi Prelude> }}}
The `$tcHi` and `$trModule` bindings are details of the Typeable implementation introduced in Phab:D1404 and should likely be hidden from the user.
This would be trivial to fix except for the fact that we currently have no way to identify this sort of `Name`. In fact any knowledge that the name was generated appears to have been thrown away as early as `OccName.mkTyConRepSysOcc`.
New description: hvr reported this morning that defining a data type in GHCi with the show types (`:set +t`) option set results in additional unexpected output. For instance, {{{ $ inplace/bin/ghc-stage2 --interactive GHCi, version 7.11.20151101: http://www.haskell.org/ghc/ :? for help Prelude> :set +t Prelude> data Hi $tcHi :: TyCon $trModule :: Module data Hi Prelude> }}} The `$tcHi` and `$trModule` bindings are details of the Typeable implementation introduced in Phab:D1404 and should likely be hidden from the user. This would be trivial to fix in `InteractiveUI.printTypeOfNames` except for the fact that we currently have no way to identify this sort of `Name`. In fact any knowledge that the name was generated appears to have been thrown away as early as `OccName.mkTyConRepSysOcc`. -- -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11051#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler