Arguments to a function not shown when point is on it about emacs-ccls HOT 3 CLOSED

Do you mean textDocument/signatureHelp?

Highlighting the current positional argument shall be helpful:
foo(arg_0, <bold>arg_1</bold>, arg_2)

But it also raises the question how to display the information of the identifier itself.. textDocument/hover of arg_1 (used by lsp-ui-doc--eldoc)

from emacs-ccls.

Sorry, my bad. I can get it when I enable lsp-ui-mode. It works in my config but fails in spacemacs because two eldocs are shown simultaneously because of which the function prototype eldoc hides itself under the variable eldoc.

from emacs-ccls.

You may be interested at emacs-lsp/lsp-mode#422

I have also recently revamped textDocument/signatureHelp in ccls.

(defun +my/lsp-ui-doc--eldoc (&rest _)
  (when (and (lsp--capability "documentHighlightProvider")
             lsp-highlight-symbol-at-point)
    (lsp-symbol-highlight))
  (if (evil-insert-state-p)
      (lsp--text-document-signature-help)
      lsp-ui-doc--string-eldoc
      ))

(advice-add #'lsp-ui-doc--eldoc :override #'+my/lsp-ui-doc--eldoc)

from emacs-ccls.