On 06/03/2017 03:38 PM, Mark wrote:
> Ok. So by using '==' it should compare the addresses of the objects?
That's the default behavior. You can change it with opEquals:
http://ddili.org/ders/d.en/object.html#ix_object.opEquals
I think you want to use the 'is' operator:
http://ddili.org/ders/d.en/class.html#ix_class.is,%20operator
It's better because 'is' can be used with null variables.
> about 45 lines, that might be a lot of code
> for a post.
Yeah. Minimal is good. :)
> how Can I obtain the actual memory address of a class?
You mean the memory address of a class object. ;) It's achieved with the
special semantics of casting the class variable to void*:
class C {
int i;
}
void info(C o) {
import std.stdio;
writefln(" Object at %s,\n" ~
"i member at %s\n", cast(void*)o, &o.i);
}
void main() {
auto a = new C();
auto b = new C();
a.info();
b.info();
}
Sample output on my system:
Object at 7F810AA53060,
i member at 7F810AA53070
Object at 7F810AA53080,
i member at 7F810AA53090
The difference of 16 bytes are from vtbl pointer and the monitor. (I
think the latter is a kind of a lizard, which nobody actually uses. :p)
Ali
