How to work with clangd?

[CherryPetale]

I would like to use clangd to get intellisense of C, but I am not sure how to implement it, so I would like to ask a few questions.

• console error
  I got somewhat close to completion, but when I finally called the following languageProvider.format();, an error occurred. This may not be all that clear, but do you have any idea what it is?
  

  ace-linters/packages/demo/websockets-lsp/client.ts

  Lines 33 to 41 in 953b3ff

  	let menuKb = new HashHandler([
  	{
  	bindKey: "Ctrl-Shift-B",
  	name: "format",
  	exec: function () {
  	languageProvider.format();
  	}
  	}
  	]);

  Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'reverse')
      at ace-language-client.js:20924:36
      at MessageController.callbackFunction (ace-language-client.js:19422:17)
      at MessageController.emit (ace-language-client.js:2504:5)
      at MockWorker.<anonymous> (ace-language-client.js:19434:18)
      at MockWorker.emit (ace-language-client.js:2504:5)
      at MockWorker.postMessage (ace-language-client.js:20975:27)
      at MockWorker.<anonymous> (ace-language-client.js:10019:17)
      at MockWorker.emit (ace-language-client.js:2504:5)
      at MockWorker.postMessage (ace-language-client.js:20975:27)
      at MessageController.postMessage (ace-language-client.js:19426:22)
  

• support for stdio

  I don't think ace-linters currently support stdio, so I had to convert the clangd input/output to web socket.
  I searched and found a similar question on stackoverflow and followed the answers on this site to set up a server using jsonrpc-ws-proxy.
  The connection seems to be working, but I am not sure if this approach is really correct.
  Do you plan to support stdio?

• official support for clangd
  I would like to see official support for the clangd. Is there a possibility?

PS: These texts are translated. Please note that this is poor English.

[mkslanc]

Hi, @CherryPetale !

• console error
  It seems worked for me though using my websockets bridge. I added example for clang there.
• Yes, currently it is not supported, but we have in plans to add stdio support
• When stdio/ipc would be added there shouldn't be any problems with clangd, except (maybe) some server configuration issues

[CherryPetale]

@mkslanc Thanks for the reply.

I decided to verify it once with monaco editor to identify the problem since you say it works fine. Then it worked fine in monaco editor.
Therefore, I found that the problem was on the ace editor side, so I investigated and found that the modes was incorrectly specified.
The ace editor also initiated communication with the server, but error failed to parse URI at (root).textDocument.uri was displayed.
So I referred to the sample code again and found that there is a process to convert uri.
https://github.com/mkslanc/websockets-ls/blob/c63e29f566004830288538ecd7b8c3f7bb1f8114/server.js#L113-L118

This was not necessary in monaco editor, but is this process required?

[mkslanc]

I would say, it depends of the use case, right now I assume that it's server's (or bridge's) responsibility to resolve uri's correctly, cause in browser env we don't have normal access to file system

[CherryPetale]

I see. thank you for your reply.