Thank you Steven for your explanations, I have done similar things in C and D, but I didn't understand what you meant.
>A is always put first, that way, a pointer to a B can always be used as a >pointer to an A.< Are you sure C specs say doing this leads to defined behaviour? (Recently from a discussion with Walter I have learnt that D follows exactly C specs regarding such defined/undefined things.) > What I would like is a common-sense approach to inheritance for structs > that just does not allow virtual methods or interfaces, and which does not > cast implicitly to the base (explicit cast is OK). I think some designs > would benefit greatly from this simple feature. I think it's more tricky > than I've described, but I think with some diligence it can be done. I have desired some form of inheritance in D structs (before the creation of alias this, that so far I have not used much). I think Walter will not love this idea, but you can think more about its details, and then you can post it in the main D newsgroup. Bye, bearophile
