analyze/invalid-cpp-conversion

This happens when there’s an unsupported implicit conversion needed between two types. This can happen between two native types, such as when you try to use a native value for an if condition and it can’t implicitly convert to bool.

This can also happen for unsupported trait conversions. In that case, a jank object is expected and a native value is provided, but there is no conversion trait which allows jank to get from the native value to the jank object.

Mitigations

If you’re implicitly casting between two native types, you’ll need to sort out how that can be done more explicitly.

If you’re converting a native value into a jank object, you have a few options.

1. You can wrap the native value in an opaque box, if its lifetime allows that.
2. You can define a conversion trait for your native type.
3. You can also build a jank object from the native value’s members.

For more information on all of this see here.