Classes on stack

[Guillaume Piolat]

On Thursday, 1 September 2022 at 12:08:05 UTC, Redwan wrote:
>
> I need inheritance and other OOP concepts and template 
> features. does D's struct support them? as I found, No.

There are ways to put classes on the stack (std.typecons.scoped, 
emplace()...), but not completely polymorphic classes.

In C++, polymorphic dynamic-dispatch objects are not value types 
either, you need the concrete type to put them on stack or risk 
slicing. They would typically be on the heap with `new` / 
`unique_ptr`.

So it's really the same constraints, if you have a capped maximum 
of what the child class will be, you can also emplace in a byte 
array on the stack any instance of the hiearachy.