Should we avoid assignment of derived types in robust programs?

[aradi]

@aradi

But, probably this is a valid optimization choice (using a kind of move_alloc instead of create, copy, destroy). So probably, the advice for robust containers can be slightly weakened:

I was too enthusiastic, the different behavior is not a valid optimization strategy, but apparently a fundamentally different interpretation of the standard by the various compilers, see Intrinsic assigment of derived types containing components with user defined assignment. So, at the end, even if the wrapping strategy may in theory solve many problems, it can not be relied on currently due to implementation differences in various compilers.