[GHC] #11466: Constraint synonym with Implicit Parameter
#11466: Constraint synonym with Implicit Parameter -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.1 (Type checker) | 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: -------------------------------------+------------------------------------- This: {{{ {-# LANGUAGE ConstraintKinds, ImplicitParams #-} module Foo where type Foo = ?foo::() }}} gives {{{ Foo.hs:3:1: error: • Illegal implicit parameter ‘?foo::()’ • In the type synonym declaration for ‘Foo’ }}} in GHC HEAD. It used to work in GHC-7.10. Did not check GHC-8.0. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11466 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#11466: Constraint synonym with Implicit Parameter -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.1 checker) | 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 gridaphobe): * cc: gridaphobe (added) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11466#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#11466: Constraint synonym with Implicit Parameter
-------------------------------------+-------------------------------------
Reporter: nomeata | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler (Type | Version: 8.1
checker) |
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 Simon Peyton Jones
#11466: Constraint synonym with Implicit Parameter -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: merge Priority: normal | Milestone: Component: Compiler (Type | Version: 8.1 checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: | polykinds/T11466 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by simonpj): * testcase: => polykinds/T11466 * status: new => merge -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11466#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#11466: Constraint synonym with Implicit Parameter -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler (Type | Version: 8.1 checker) | Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: | polykinds/T11466 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * status: merge => closed * resolution: => fixed Comment: Merged to `ghc-8.0` in 3b6b1700ac589155cdc9bc393c1ef27eecf8eaed. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11466#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#11466: Constraint synonym with Implicit Parameter -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: closed Priority: normal | Milestone: 8.0.1 Component: Compiler (Type | Version: 8.1 checker) | Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: | polykinds/T11466 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * milestone: => 8.0.1 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11466#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#11466: Constraint synonym with Implicit Parameter -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: closed Priority: normal | Milestone: 8.0.1 Component: Compiler (Type | Version: 8.1 checker) | Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: | polykinds/T11466 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by nomeata): This is missing the stderr file, I see this on travis: {{{ Actual stderr output differs from expected: --- /dev/null 2015-01-28 16:31:58.000000000 +0000 +++ ./polykinds/T11466.comp.stderr.normalised 2016-01-21 22:52:43.864816991 +0000 @@ -0,0 +1,6 @@ + +T11466.hs:15:10: + Illegal implicit parameter ‘?x::Int’ + In the context: Bla + While checking an instance declaration + In the instance declaration for ‘Eq T’ \ No newline at end of file *** unexpected failure for T11466(normal) }}} https://s3.amazonaws.com/archive.travis-ci.org/jobs/103959091/log.txt -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11466#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#11466: Constraint synonym with Implicit Parameter -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: closed Priority: normal | Milestone: 8.0.1 Component: Compiler (Type | Version: 8.1 checker) | Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: | polykinds/T11466 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): Correct: can someone just add the .stderr file. Sorry about that. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11466#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#11466: Constraint synonym with Implicit Parameter
-------------------------------------+-------------------------------------
Reporter: nomeata | Owner:
Type: bug | Status: closed
Priority: normal | Milestone: 8.0.1
Component: Compiler (Type | Version: 8.1
checker) |
Resolution: fixed | Keywords:
Operating System: Unknown/Multiple | Architecture:
| Unknown/Multiple
Type of failure: None/Unknown | Test Case:
| polykinds/T11466
Blocked By: | Blocking:
Related Tickets: | Differential Rev(s):
Wiki Page: |
-------------------------------------+-------------------------------------
Comment (by Joachim Breitner
#11466: Constraint synonym with Implicit Parameter -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: closed Priority: normal | Milestone: 8.0.1 Component: Compiler (Type | Version: 8.1 checker) | Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: | polykinds/T11466 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by nomeata):
Correct: can someone just add the .stderr file. Sorry about that.
✓ -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11466#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#11466: Constraint synonym with Implicit Parameter -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: closed Priority: normal | Milestone: 8.0.1 Component: Compiler (Type | Version: 8.1 checker) | Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: | polykinds/T11466 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Iceland_jack): It says this should be rejected {{{#!hs -- But this should be rejected instance Bla => Eq T }}} but should this be allowed? {{{#!hs instance ?x::Int => Eq T }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11466#comment:10 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#11466: Constraint synonym with Implicit Parameter -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: closed Priority: normal | Milestone: 8.0.1 Component: Compiler (Type | Version: 8.1 checker) | Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: | polykinds/T11466 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): {{{ instance ?x::Int => Eq T }}} No it should not be allowed! Instances are resolved in unpredicatable places, which is incompatible with knowing exactly which `?x` is used. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11466#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
participants (1)
-
GHC