Is there any documentation on how to use emacs with D? The github page of emacs d-mode [1] does not really explain a lot, nor does the wiki-page [2].

At the moment, I use the following packages: d-mode, flycheck-d-unittest and company-dcd. I really like the way unittests are underlined when failing by flycheck, giving an almost REPL-like programming experience.

Autocompletion with company-dcd and syntax check with flycheck mostly work fine, but they are not able to find my packages installed with DUB. Also, company-dcd-goto-definition only works for the standard-library, it is not able to find the definition of my own functions nor packages I installed with DUB.

Is there a dfmt-package for emacs? I still use clang-format, which kind of works for D-code except when the syntax does not exist in C++ (for example "=>" ).

[1] https://github.com/Emacs-D-Mode-Maintainers/Emacs-D-Mode
[2] https://wiki.dlang.org/Editors

On Monday, 8 February 2021 at 09:10:26 UTC, glis-glis wrote:
> Is there any documentation on how to use emacs with D? The github page of emacs d-mode [1] does not really explain a lot, nor does the wiki-page [2].
>
> [...]

Given the absence on replies, I see two possibilities:
(1) I'm the only emacs-user
or
(2) All emacs-users encounter the same problems I do

On Thursday, 18 February 2021 at 15:29:51 UTC, glis-glis wrote:
> On Monday, 8 February 2021 at 09:10:26 UTC, glis-glis wrote:
>> Is there any documentation on how to use emacs with D? The github page of emacs d-mode [1] does not really explain a lot, nor does the wiki-page [2].
>>
>> [...]
>
> Given the absence on replies, I see two possibilities:
> (1) I'm the only emacs-user
> or
> (2) All emacs-users encounter the same problems I do

I also use Emacs with D but I just use syntax highlighting at the moment. You might want to try a language server protocol server for D like https://github.com/pure-d/serve-d. I have not used it myself, but I have used something similar with TypeScript in the past successfully in Emacs.

On Monday, 8 February 2021 at 09:10:26 UTC, glis-glis wrote:
> Autocompletion with company-dcd and syntax check with flycheck mostly work fine, but they
> are not able to find my packages installed with DUB. Also, company-dcd-goto-definition
> only works for the standard-library, it is not able to find the definition of my own
> functions nor packages I installed with DUB.

Unfortunately, I can't help here as I only use d-mode for syntax highlighting.

> Is there a dfmt-package for emacs? I still use clang-format, which kind of works for D-code except when the syntax does not exist in C++ (for example "=>" ).

I haven't used clang-format nor do I know if there is a dfmt package, but you could define a function that runs "dfmt" on the current file.  I can share a basic implementation if you need.

You could also take a look at [uncrustify] which has support for D, though I haven't used it.  There even seem to be some (old, but hopefully working,) modes for it:

- https://github.com/glima/Emacs-uncrustify
- https://github.com/koko1000ban/emacs-uncrustify-mode

[uncrustify]: http://uncrustify.sourceforge.net/

On Monday, 8 February 2021 at 09:10:26 UTC, glis-glis wrote:
> Is there any documentation on how to use emacs with D?

Well, that depends entirely on how you use D, and how you use Emacs. :)

> Autocompletion with company-dcd and syntax check with flycheck mostly work fine, but they are not able to find my packages installed with DUB.

For this, you probably want the flycheck-dmd-dub package:

https://github.com/atilaneves/flycheck-dmd-dub

> Also, company-dcd-goto-definition only works for the standard-library, it is not able to find the definition of my own functions nor packages I installed with DUB.

company-dcd actually uses flycheck-dmd-dub to query Dub import paths and pass them on to DCD, so it should work (though perhaps something needs to be turned on or otherwise configured first).

> Is there a dfmt-package for emacs? I still use clang-format, which kind of works for D-code except when the syntax does not exist in C++ (for example "=>" ).

For indentation, you can use cc-mode's facilities, which are supported in d-mode via indent-region.

For full-on formatting, Per Nordlöw wrote a dfmt package (wrapping the titular tool). A copy can be found here: https://github.com/qsimpleq/elisp-dfmt