• Jack (10/10) Feb 05 2021 in C/C++ you have void* and C#'s object, to create a variable to
• Paul Backus (7/17) Feb 05 2021 If it's just for classes, you can use `Object` [1], which is the
• H. S. Teoh (9/23) Feb 05 2021 D has void*.
• Jack (1/1) Feb 07 2021 Thanks for your answers guys!

Jack <jckj33 gmail.com> writes:

class A {
   object foo;
}

and

var a = new A();
a.foo = any class...;

does D have something like this or template parameters are used 
instead of?

Paul Backus <snarwin gmail.com> writes:

On Saturday, 6 February 2021 at 02:01:28 UTC, Jack wrote:



 class A {
   object foo;
 }

 and

 var a = new A();
 a.foo = any class...;

 does D have something like this or template parameters are used 
 instead of?

If it's just for classes, you can use `Object` [1], which is the 
universal base class.

For absolutely any type at all, you can try using `Variant` [2], 
though it has a few limitations.

[1] http://druntime.dpldocs.info/object.Object.html
[2] http://phobos.dpldocs.info/std.variant.Variant.html

"H. S. Teoh" <hsteoh quickfur.ath.cx> writes:

On Sat, Feb 06, 2021 at 02:01:28AM +0000, Jack via Digitalmars-d-learn wrote:


 
 class A {
   object foo;
 }
 
 and
 
 var a = new A();
 a.foo = any class...;
 
 does D have something like this or template parameters are used
 instead of?

D has void*.

But if you have a class, it's probably better to use the universal base
class Object, which is more type-safe.

Alternatively, check out std.variant, which provides true dynamic
typing as a tagged union.


T

-- 
"You know, maybe we don't *need* enemies." "Yeah, best friends are about all I
can take." -- Calvin & Hobbes

Jack <jckj33 gmail.com> writes:

Thanks for your answers guys!