Changes to header not registering in cpp file about emacs-ccls HOT 3 CLOSED

// a.cc
#include "a.h"
int main() { foo(); }
// a.h
// empty

There is "use of undeclared identifier 'foo'" error message published by textDocument/publishDiagnostics. Then, if you put void foo(); into a.h and make an edit in a.cc, the edit causes the client (lsp-mode) to send a textDocument/didChange notification to the ccls server. ccls will thereby send an empty textDocument/publishDiagnostics to indicate the error has been fixed.

Sometimes there may be lingering diagnostics, but that is probably lsp-ui-flycheck (or flycheck) or flymake's problem.

from emacs-ccls.

Thank you. Now that I know what to look for in the logs, it seems the empty publishDiagnostics message is being sent, so the problem is with lsp-ui.

from emacs-ccls.

If you use lsp-ui-flycheck, see emacs-lsp/lsp-ui#214

from emacs-ccls.