Frits van Bommel пишет:
Weed wrote:
In C++, we had the problem - "slicing" objects.
In D this problem is solved inability to inherit from structs.
Without inheritance of structs many things are not possible, compared
with C++.
Why, instead of the complete inability to inherit, just do not make
impossible to up casting struct type by value.
like this:
struct s1 {}
struct s2 : s1 {}
s1 base;
s2 derr;
s1* base_ptr = &derr; // ok
s1 val = derr; // error
This is why:
s1 val2 = *base_ptr; // error
Yes, right.
I do not understand that it is wrong?
>
> (And disallowing '*ptr' on struct pointers is not likely to find much
> support)
I am not saying do not let '* ptr'. Besides, now you can not do this
just because there is no inheritance at all.
