Dynamic alter-ego of D.

[Robert Jacques]

On Tue, 25 Oct 2011 09:23:10 -0400, Gor Gyolchanyan <gor.f.gyolchanyan at gmail.com> wrote:
> I need an extremely fast and small typeless container for a single
> object, which i can use to implement a fast and efficient dynamic
> callback mechanism, where the exact number and types of parameters are
> only known to the callback and to the source of the parameter values
> and all intermediate manager classes, who hold and return the callback
> do not know it.
>
> On Tue, Oct 25, 2011 at 5:20 PM, Gor Gyolchanyan
> <gor.f.gyolchanyan at gmail.com> wrote:
>> Variant is heavy. It contains and does lots of things, that are not
>> always required.
>> a tiny type-less variable is versatile and can be used for any
>> purposes. It's even type-safe in debug mode.
>> Also, Variant needs explicit construction, whereas the tiny typeless
>> variable automatically accepts any value.
>> Also, Variant does not grant access to underlying raw data, but tiny
>> typeless value can be taken address of (void*).

Just because something is feature-full, doesn't make it heavy weight. But I guess over a raw tagged-union with a limited interface, it would be considered heavy. But, I don't understand you concept of a type-less variable. Truly type-less variables don't exist in any language; you always have a pluripotent dynamic type like variant under the hood.