[GHC] #9634: "data X = 1": "Illegal literal in type (use DataKinds to enable): 1"
#9634: "data X = 1": "Illegal literal in type (use DataKinds to enable): 1" -------------------------------------+------------------------------------- Reporter: rwbarton | Owner: Type: bug | Status: new Priority: low | Milestone: Component: Compiler (Type | Version: 7.9 checker) | Operating System: Keywords: | Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: Difficulty: Unknown | None/Unknown Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- This error message is not good. "1" is not in a type position, and DataKinds will not help anything. Well, except the error message, which with DataKinds enabled is instead {{{ parse error in constructor in data/newtype declaration: 1 }}} If it's not hard, we should give that error message also when DataKinds is disabled. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9634 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#9634: "data X = 1": "Illegal literal in type (use DataKinds to enable): 1"
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Reporter: rwbarton | Owner:
Type: bug | Status: new
Priority: low | Milestone:
Component: Compiler | Version: 7.9
(Type checker) | Keywords:
Resolution: | Architecture: Unknown/Multiple
Operating System: | Difficulty: Unknown
Unknown/Multiple | Blocked By:
Type of failure: | Related Tickets:
None/Unknown |
Test Case: |
Blocking: |
Differential Revisions: |
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Comment (by Simon Peyton Jones
#9634: "data X = 1": "Illegal literal in type (use DataKinds to enable): 1" -------------------------------------+------------------------------------- Reporter: rwbarton | Owner: Type: bug | Status: closed Priority: low | Milestone: Component: Compiler | Version: 7.9 (Type checker) | Keywords: Resolution: fixed | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: | Related Tickets: None/Unknown | Test Case: | typecheck/should_fail/T9634 | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by simonpj): * status: new => closed * testcase: => typecheck/should_fail/T9634 * resolution: => fixed Comment: Good point, thank you. We now get {{{ T9634.hs:3:10: Cannot parse data constructor in a data/newtype declaration: 1 }}} whether or not `DataKinds` is on Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9634#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
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