On 10/31/11 12:39 PM, Steve Teale wrote:
On Mon, 31 Oct 2011 07:58:11 -0500, Andrei Alexandrescu wrote:
On 10/31/11 4:43 AM, Steve Teale wrote:
Is there a way to do this. For example if I have
struct A { int a, b, c; }
struct B
{
int p, q, r, s;
this(A a) { p = a.a; q = a.b; r = a.c; }
}
A a;
B b;
b = a;
Use opAssign?
Joseph (aka Andrei),
But if B is not mine to mess with?
In Soviet Russia everything belongs to the people so you can mess with
anything.
The two structs have a common type prefix. and D guarantees that there
are predictable values for the remainder of the larger one, so the
compiler could presumably figure it out. (Easy for me to say)
Well yes, so you could use memcpy, but then that will become a soft
error when you change the structs involved. You could take .tupleof for
a B object and access its first there members. Generally we could
automate a structural cast any way we want but probably we should limit
such to only when the names of the members are also identical.
Andrei
