[GHC] #13650: Implement KPush in types
#13650: Implement KPush in types -------------------------------------+------------------------------------- Reporter: goldfire | Owner: (none) Type: task | Status: new Priority: high | Milestone: 8.4.1 Component: Compiler | Version: 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: -------------------------------------+------------------------------------- A recent commit contributed a [https://phabricator.haskell.org/diffusion/GHC/browse/master/compiler/types/T... Note] that explains why we need the dreaded KPush rule to be implemented in `splitTyConApp`. Without KPush there, it's possible that we can have two types t1 and t2 such that {{{t1 `eqType` t2}}} and yet they respond differently to `splitTyConApp`: t1 = `(T |> co1) (a |> co2)` and t2 = `T a`. Both t1 and t2 are well-kinded and can have the same kind. But one is a `TyConApp` and one is an `AppTy`. (Actually, looking at this, perhaps the magic will be in `mkAppTy`, not `splitTyConApp`.) But I have to look closer. This ticket serves as a reminder to do so. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13650 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#13650: Implement KPush in types -------------------------------------+------------------------------------- Reporter: goldfire | Owner: goldfire Type: task | Status: new Priority: high | Milestone: 8.4.1 Component: Compiler | Version: Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by goldfire): * owner: (none) => goldfire -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13650#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#13650: Implement KPush in types -------------------------------------+------------------------------------- Reporter: goldfire | Owner: goldfire Type: task | Status: new Priority: high | Milestone: 8.4.1 Component: Compiler | Version: Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by goldfire): One wrinkle (at least until #11715 is fixed): which `eqType` do we wish to respect here? `eqType` or `tcEqType`? I think it might be best to wait until after #11715. Or it's possible that it doesn't matter which `eqType` we're thinking of. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13650#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#13650: Implement KPush in types -------------------------------------+------------------------------------- Reporter: goldfire | Owner: goldfire Type: task | Status: new Priority: high | Milestone: 8.6.1 Component: Compiler | Version: Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * milestone: 8.4.1 => 8.6.1 Comment: This won't happen for 8.4. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13650#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#13650: Implement KPush in types -------------------------------------+------------------------------------- Reporter: goldfire | Owner: goldfire Type: task | Status: new Priority: high | Milestone: Component: Compiler | Version: Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * milestone: 8.6.1 => Comment: Removing milestone as there is no one actively working on this. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13650#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#13650: Implement KPush in types -------------------------------------+------------------------------------- Reporter: goldfire | Owner: goldfire Type: task | Status: new Priority: high | Milestone: Component: Compiler | Version: Resolution: | Keywords: TypeInType Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by simonpj): * keywords: => TypeInType -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13650#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
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