DIP: add Bit Fields

[Daniel N]

On Saturday, 9 March 2024 at 10:56:33 UTC, Dennis wrote:
> On Saturday, 9 March 2024 at 10:46:10 UTC, Daniel N wrote:
>> Not on dub, but my closed source makes use of it. Vendor 
>> supplied register definitions uses bitfields with C semantics. 
>> Also IPC where client/server is written in different languages.
>
> That would be great material for the DIP. Can you give a link 
> to such a register definition, and show what your current 
> approach is to create C compatible bit fields for it in D?

The sdk license doesn't allow me to share the files.

But you can find similar code here...
https://www.renesas.com/us/en/document/apn/sh7450-groupsh7451-group-register-definition-header-file

Typically an union with a word sized member is combined with the 
bitfields to provide either atomic access or convenient access to 
the fields.

Without native D support, I just use C for the lowest layer 
instead.