Looking for details of how interface method tables are implemented in D

Sat Jun 17 17:09:36 UTC 2023

On Saturday, 17 June 2023 at 12:34:41 UTC, Dibyendu Majumdar 
wrote:
> Hi
>
> I am looking for details of how interface method dispatch works 
> in D.
> I would be grateful for any documentation of code references I 
> can lookup.
>
> In particular, I wanted to understand how similar / different 
> the implementation is compared to Java.
>
> Regards
> Dibyendu

That is specified 
[here](https://dlang.org/spec/abi.html#interfaces). So you have 
additional dereference to access the vtbl of an interface (vs 
class vtbl). Then an address is read in this table, cast to a 
function type, then called like a standard virtual call.