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  • #10963

Closed
Open
Created 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 [].

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Version 7.10.2
Type FeatureRequest
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
Test case
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