Show, Read, Eq, Ord instances for Control.Applicative.Const
As mentioned in https://www.haskell.org/pipermail/libraries/2013-October/021531.html, the following instances can be derived clearly:
Show a => Show (Const a b)Read a => Read (Const a b)Eq a => Eq (Const a b)Ord a => Ord (Const a b)
The absence of these instances makes debugging harder.
I suggest handcrafted Show/Read instances for neat representation.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.8.4 |
| Type | FeatureRequest |
| TypeOfFailure | OtherFailure |
| Priority | low |
| Resolution | Unresolved |
| Component | libraries/base |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | ekmett, hvr |
| Operating system | |
| Architecture |