[Issue 10971] assigning derived class to base should not trigger promotion of result

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=10971


Andrej Mitrovic <andrej.mitrovich at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |andrej.mitrovich at gmail.com


--- Comment #5 from Andrej Mitrovic <andrej.mitrovich at gmail.com> 2013-09-05 10:51:22 PDT ---
Counterpoint:

-----
class A
{
    A next(A newA) { return new A; }  // does not return B!
}
class B : A
{}

void main()
{
    B first = new B;
    B last = first;
    last = (last.next = new B);
}
-----

If someone changes a field into a property, your code would break.

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