Compiler switch for integer comparison/promotion to catch a simple error

[matheus]

On Sunday, 29 May 2022 at 01:35:23 UTC, frame wrote:
> Is there a compiler switch to catch this kind of error?
>
> ```d
> ulong v = 1;
> writeln(v > -1);
> ```
>
> IMHO the compiler should bail a warning if it sees a logic 
> comparison between signed and unsigned / different integer 
> sizes. There is 50% chance that a implicit conversion was not 
> intended.

Well I don't know about this, but of course I think (That if not) 
we should have at least a flag like we have with GCC (-Wextra).

Searching about I found in this topic: 
https://forum.dlang.org/post/hhpacodmcibejatqzdfg@forum.dlang.org

"Good luck adding a warning into DMD. After years there still 
isn't a warning for unsigned/signed comparisons."

This is from 2017, so let's wait for experienced weighting in.

Matheus.