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  • Glasgow Haskell Compiler
  • GHCGHC
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  • #10963

Closed
Open
Opened Oct 13, 2015 by kanetw@trac-kanetw

Beginner-targeted language extension

FMP significantly complicated type signatures such as length :: Foldable t => t a -> Int, which makes teaching Haskell more difficult.

I propose a language extension -XBeginner which instructs GHC(i) to specialize Foldable and Traversable to [] when possible and in case of an ambiguous instance, default those to [].

Trac metadata
Trac field Value
Version 7.10.2
Type FeatureRequest
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture
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Assign to
8.2.1
Milestone
8.2.1 (Past due)
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None
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Reference: ghc/ghc#10963