cats
https://github.com/typelevel/cats
Scala
Lightweight, modular, and extensible library for functional programming.
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- Issues
- Move Binary Incompatible instances and syntax into main traits for 2.0
- Consider using a composition based encoding for some type classes to avoid implicit collisions
- ApplicativeError's `orElse` should accept widening?
- Instances for Future
- No scaladoc for `TupleNSemigroupalOps` classes (e.g. `mapN` method)?
- Missing instances for Cofree
- Infix operators for flatMap, coflatMap and cokleisli composition
- Given MonadError[F, Z], EitherT[F, E, ?] should provide a MonadError[..., Either[Z, E]]
- Add error-handling methods to `EitherT`
- Add a type class for principled error handling
- Docs
- Scala not yet supported