Flag to warn when deriving strategy is not explicitly specified
In my code, I aim to always specify deriving strategies. I would like to add a flag -fwarn-unspecified-deriving that would cause a warning to be emitted when someone wrote this:
newtype Foo = Foo Int
deriving (Show)The user would be required to instead write:
newtype Foo = Foo Int
deriving newtype (Show)Or they could use stock if that was the behavior they wanted. This flag would be off by default.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.6.1 |
| Type | FeatureRequest |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |