Comments (5)
@stew has an example of the tagged type approach here
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There was also discussion of Scalactic's Or And Every (scroll down; no anchor) in gitter.
from cats.
I'm not convinced that type tagging in scala works all that well -- or at least if it does, I'm not sure we've found the right solution yet. See the bugs fixed and new bugs introduced by scalaz 7.1's tagging as compared to 7.0.
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I'm going to throw together a Validation class
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Fixed by #239
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Related Issues (20)
- `Tuple1SemigroupalOps` methods have different names from other `TupleNSemigroupalOps` classes HOT 3
- Instances for Currency HOT 7
- EitherT[Option, ?, ?]] can't be used as a bifunctor HOT 5
- trait EuclidianRing should not be a Ring HOT 4
- OutOfMemoryError when IO.uncancelable is used in recursive function HOT 1
- ambiguous implicit resolution of `Show.ContravariantShow[immutable.SortedMap[K, V]]` HOT 1
- Should Monad extend Defer? HOT 11
- Support Scala Native 0.5 HOT 3
- Adding an alternative version of the method whenA with a different signature
- `Eval` thread safety HOT 4
- Optimize `distinct`/`distinctBy` implementations for non-empty collections
- [PROPOSAL] Aliases for methods `traverse_` and `sequence_` HOT 7
- Any reason `intercalate` isn't exposed directly on the `Semigroup` companion object? HOT 3
- (very breaking) change in Future instances? HOT 5
- Reveal internal but public identifiers and make them `private[cats]`
- Cats Order needs an `orElseBy` combinator HOT 8
- Loss of type safety in scala 3 under certain conditions
- Make Later covariant in its type parameter
- Ease awkward constructions when doing something before raising HOT 1
- A flaky test fired in `CokleisliSuite` on the Native Platform
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