[WIP] Add error messages for unsupported macro features on compilation

[cojmeister]

This PR is in response to issue #3945

Returning an error message when calling an unsupported macro feature in compilation.

Currently only doing so for weakref.

[codspeed-hq]

CodSpeed Performance Report

Merging #3993 will not alter performance

_{Comparing cojmeister:add-error-messages-for-unsupported-macro-features-on-compilation (5bb7425) with main (7d319a9)}

Summary

✅ 64 untouched benchmarks

[davidhewitt]

Thanks, looking like the right direction for sure. You should also have a look at tests/test_compile_error.rs and in particular tests/ui/abi3_nativetype_inheritance.rs as an example of how we check error messages for the abi3 feature.

[davidhewitt]

Suggested change

	if is_abi3() && python_version >= PY_3_9 {
	set_option!(weakref);
	} else {
	return Err(syn::Error::new((weakref.span()), "`weakref` not supported until python 3.9 or graeter",));
	}
	if python_version >= PY_3_9 || !is_abi3() {
	set_option!(weakref);
	} else {
	return Err(syn::Error::new((weakref.span()), "`weakref` not supported with `abi3` until python 3.9 or graeter",));
	}

[davidhewitt]

Continued in #4194. Thanks for the contribution!