[raxxorrax]

I would agree with the suggestion then. It can happen that you just write it out like that and the compiler should maybe inform me. But why limit it to 2^ and 10^ and not say literal^literal should always produce a warning? Any common or valid usages that I am missing here?

[rocqua]

Certainly, I'd say if either side is a hex or octal literal, it might be someone intentionally bit-twideling.

As for limiting the base, that is a more fluid matter. I guess you want to avoid warnings for very large numbers. Because those are more likely legitimate.

[NotPaidToPost]

> But why limit it to 2^ and 10^ and not say literal^literal should always produce a warning?

You're suggesting that using the C language as specified and intended should produce a warning... That makes no sense.