Now that the dmd backend is in D...?

[Petar]

On Thursday, 1 August 2019 at 08:59:28 UTC, Walter Bright wrote:
> On 7/31/2019 8:03 PM, Jonathan Marler wrote:
>> Now that the dmd backend is in D, are there plans to remove 
>> the old C++ organization?
>
> No. It's still used to compile the DMC++ compiler. Trying to 
> reshuffle all that around will cause me major problems.

Obviously we need a way to ensure that all changes to the backend 
don't cause any problems for DMC++.

Would you be interested in the community setting up a repo with 
both dmd and dmc, so each change to the backend (whether it is a 
bug fix, enhancement or refactoring) is tested against both dmd 
and dmc - they both need to compile and have their respective 
test suites pass.

If you're interested, we can brainstorm different possibilities:

* Move dmc repo to dmd/src/dmc, move dmc's tests to dmd/tests/dmc
* Include dmd as a git submodule in the dmc repo - a PR that 
affects the backend will need to be first merged in dmc and then 
dmd
* etc...