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 | |
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