[GHC] #15675: Type operators in existential context cannot be parsed
#15675: Type operators in existential context cannot be parsed -------------------------------------+------------------------------------- Reporter: int-index | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.8.1 Component: Compiler | Version: 8.4.3 (Parser) | Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: GHC rejects Unknown/Multiple | valid program Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- {{{#!haskell {-# LANGUAGE TypeOperators, MultiParamTypeClasses, ExistentialQuantification #-} class a + b data D1 = forall a b. (a + b) => D1 a b data D2 = forall a b. a + b => D2 a b }}} The declaration `D1` is accepted, while `D2` is rejected. There is no reason to reject `D2` except for shortcomings of the current grammar. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15675 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#15675: Type operators in existential context cannot be parsed -------------------------------------+------------------------------------- Reporter: int-index | Owner: int-index Type: bug | Status: new Priority: normal | Milestone: 8.8.1 Component: Compiler | Version: 8.4.3 (Parser) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D5180 Wiki Page: | -------------------------------------+------------------------------------- Changes (by int-index): * owner: (none) => int-index * differential: => Phab:D5180 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15675#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#15675: Type operators in existential context cannot be parsed
-------------------------------------+-------------------------------------
Reporter: int-index | Owner: int-index
Type: bug | Status: new
Priority: normal | Milestone: 8.8.1
Component: Compiler | Version: 8.4.3
(Parser) |
Resolution: | Keywords:
Operating System: Unknown/Multiple | Architecture:
Type of failure: GHC rejects | Unknown/Multiple
valid program | Test Case:
Blocked By: | Blocking:
Related Tickets: | Differential Rev(s): Phab:D5180
Wiki Page: |
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Comment (by Ryan Scott
#15675: Type operators in existential context cannot be parsed -------------------------------------+------------------------------------- Reporter: int-index | Owner: int-index Type: bug | Status: closed Priority: normal | Milestone: 8.8.1 Component: Compiler | Version: 8.4.3 (Parser) | Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: GHC rejects | Test Case: valid program | parser/should_compile/T15675 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D5180 Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * status: new => closed * testcase: => parser/should_compile/T15675 * resolution: => fixed -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15675#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#15675: Type operators in existential context cannot be parsed -------------------------------------+------------------------------------- Reporter: int-index | Owner: int-index Type: bug | Status: closed Priority: normal | Milestone: 8.8.1 Component: Compiler | Version: 8.4.3 (Parser) | Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: GHC rejects | Test Case: valid program | parser/should_compile/T15675 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D5180 Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): Thanks for doing this Vladislav. I think you plan to nail #1087 in the same way, which would be even better. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15675#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
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