[cfe-dev] ClangD

[Manuel Klimek via cfe-dev]

On Wed, Jan 25, 2017 at 3:08 PM Alex L <arphaman at gmail.com> wrote:

> Thanks Manuel, I'm quite excited to hear that about ClangD!
>
> I have a couple of questions:
> Do you think ClangD would be able to replace libclang in the future? Would
> it be possible to deprecate libclang for IDE use after ClangD catches up to
> it, or should we keep libclang as it is even after that point?
>

In the foreseeable future, I don't see libclang going away. Not everybody
is able to switch to a new development workflow easily, and there is a lot
of investment in the current libclang based workflows.


> On 25 January 2017 at 13:11, Manuel Klimek via cfe-dev <
> cfe-dev at lists.llvm.org> wrote:
>
> Hi fellow clang devs,
>
> we wanted to let you know that we're (finally) starting up work on ClangD,
> which you might know from email threads such as [1] (June 2012!).
>
> In the meantime, YCM had done a good enough job at packaging up a libclang
> interface to our favorite editors, and other priorities (like modules) have
> eaten up a lot of folks priority lunches.
>
> What has changed?
> 1. YCM is starting to develop more and more into a language multiplexer,
> with other languages (Go, Typescript, etc) providing their own servers to
> talk to
> 2. MS has created a language server protocol [2], which already has both a
> bunch of client and server implementations
> 3. Debugging through python into libclang crashers is a pain and eating
> our support resources
> 4. While libclang is a good abstraction if you want to have something run
> in your process with close coupling, a standard protocol like the language
> server protocol seems like a better way to allow fast iterations on the
> server implementation without the need to keep backward-compatibility hacks
> through a restrictive C API.
>
> One of the cool things about the MS language server protocol is that it
> seems to not actually do any networking, which means that we do not need to
> introduce any new dependencies into clang-tools-extra, which is where we
> want to start developing this.
>
> If you have any thoughts / concerns let me know; otherwise look forward to
> code reviews on initial ClangD dropping by :D
>
> Cheers,
> /Manuel
>
> [1] http://lists.llvm.org/pipermail/cfe-dev/2012-June/022028.html
> [2] https://github.com/Microsoft/language-server-protocol
>
>
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