[GHC] #8577: Polymorphism and typed TH
#8577: Polymorphism and typed TH ------------------------------------+------------------------------------- Reporter: monoidal | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Template Haskell | Version: 7.6.3 Keywords: | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+------------------------------------- Consider {{{ data A a = A x = [||A||] y = x :: Q (TExp (A Int)) }}} `$$x` is given type `A a`, as expected. However, `$$y` is also given type `A a`. I would expect it to be `A Int`. In other words, given `p :: Q (TExp T1), $$p :: T2` I think GHC should verify the equation `T1 ~ T2`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8577 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#8577: Polymorphism and typed TH
-------------------------------------+------------------------------------
Reporter: monoidal | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Template Haskell | Version: 7.6.3
Resolution: | Keywords:
Operating System: Unknown/Multiple | Architecture: Unknown/Multiple
Type of failure: None/Unknown | Difficulty: Unknown
Test Case: | Blocked By:
Blocking: | Related Tickets:
-------------------------------------+------------------------------------
Comment (by Simon Peyton Jones
#8577: Polymorphism and typed TH
-------------------------------------+------------------------------------
Reporter: monoidal | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Template Haskell | Version: 7.6.3
Resolution: | Keywords:
Operating System: Unknown/Multiple | Architecture: Unknown/Multiple
Type of failure: None/Unknown | Difficulty: Unknown
Test Case: | Blocked By:
Blocking: | Related Tickets:
-------------------------------------+------------------------------------
Comment (by Simon Peyton Jones
#8577: Polymorphism and typed TH -------------------------------------+------------------------------------ Reporter: monoidal | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Template Haskell | Version: 7.6.3 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Changes (by simonpj): * status: new => closed * resolution: => fixed Comment: Good catch! A terrible bug. Thanks. Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8577#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
participants (1)
-
GHC