Hi, nice idea.

Some questions/remarks I had while reading:

1. If I understand correctly, as soon as you add `layout:` in a class definition, you _must_ list all non-static member objects. Correct?

2. I infer that two classes with the same name in the same namespace with the same members but different layouts leads to a compilation error.

Am I correct?

3. In my humble opinion, the alignment should be part of the layout as it is directly related.

4. Could you add examples of ABI maintenance while evolving a class? I can see how but I think it would be useful in the paper.

5. How would that impact classes with virtual function members? Should the implementation of the virtual calls (through v-table usually)_ be ignored and be implementation-defined? Or should it be visible in the layout section?

A. Joël Lamotte