DMD compiler - warning of unused variables

[user1234]

On Monday, 16 August 2021 at 14:14:27 UTC, DLearner wrote:
>
> Is there a compiler option that would warn that variable 'j' is 
> defined but not used?
>
> Best regards

No in DMD but you can use 
[D-Scanner](https://code.dlang.org/packages/dscanner) for that. 
The check works reasonably as long as the variables are not 
introduced by `mixin()` or metaprog.