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  • #8165

Closed
Open
Opened Aug 23, 2013 by MikeIzbicki@trac-MikeIzbicki

Use GeneralizedNewtypeDeriving to automatically create associated type families

Here's a simple example:

class C a where
    type T a

instance C Int where
    type T Int = Bool

newtype NT = NT Int
    deriving C
Trac metadata
Trac field Value
Version 7.6.3
Type FeatureRequest
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture
Assignee
Assign to
8.2.1
Milestone
8.2.1 (Past due)
Assign milestone
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None
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None
Reference: ghc/ghc#8165