Optionally have trait methods use `track_caller` to push panic information to the caller

[zesterer]

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Hopefully the issue title is fairly self-explanatory. Is this a desirable feature? This could take the form of an optional track_caller feature.

[JelteF]

For which derives are you interested in this specifically?

[zesterer]

Specifically, the operator traits (add, mul, etc.). I've got a client type that often experiences overflows in those operators, and no ability to unwind the stack on my target platform, so I end up with panic messages that point to the middle of the derive code rather than the use location.

[JelteF]

Ah, okay yeah that does seem annoying. I think for operators it indeed makes sense to add track_caller. Could you send a PR for that?

[JelteF]

To clarify I don't think this needs to be an optional feature, but can simply be done always for add and mul derives.

[zesterer]

I'm not too familiar with the codebase, is there some specific location that's best to start implementing this?

[zesterer]

Thanks so much for implementing this! This will make debugging fixed-point ops on embedded platforms without stack traces infinitely easier!