clangd not hiding suggestions after comma or space

[McArdellje]

Checkhealth

Put result of :checkhealth compe.

## compe:snippet
  - OK: snippet engine detected.

## compe:mapping
  - INFO: `compe#complete` is not mapped
  - OK: `compe#confirm` is mapped: (`i  <CR>          vsnip#available(1)  ? '<Plug>(vsnip-expand-or-jump)' : compe#confirm("<CR>")`)
  - INFO: `compe#close` is not mapped
  - INFO: `compe#scroll` is not mapped

Describe the bug

while using the clangd server from lspconfig comma and space don't hide the autocomplete suggestions, they only filter it to only show functionf

To Reproduce

Steps to reproduce the behavior with the minimal config:
add Plug 'neovim/nvim-lspconfig' to the plug section of the minimal.vim
add this to the end of the minimal.vim

lua<<EOF
require'lspconfig'.clangd.setup {}
vim.o.completeopt = "menuone,noselect"
require'compe'.setup {
    enabled = true;
    autocomplete = true;
    debug = false;
    min_length = 1;
    preselect = 'enable';
    throttle_time = 80;
    source_timeout = 200;
    incomplete_delay = 400;
    max_abbr_width = 100;
    max_kind_width = 100;
    max_menu_width = 100;
    documentation = true;

    source = {
        path        = false;
        buffer      = false;
        calc        = true;
        nvim_lsp    = true;
        nvim_lua    = true;
        vsnip       = true;
        ultisnips   = false;
    };
}
EOF

Actual behavior

typing a comma or space during autocomplete filters suggestions to only show functions

Expected behavior

typing a comma or space stops autocomplete

Screenshots (optional)

clangd_autocomplete_issue.mp4

Additional context (optional)

cland version 12.0.1

[LimbicSys]

I have the same problem with clangd.

function!  CloseComplete() abort
  if mode()[0] ==# 'i' && pumvisible()
    return ",\<C-r>=luaeval('require\"compe\"._close()')\<CR>"
  endif
  return ","
endfunction

imap <silent> <expr> , CloseComplete()

I use this script in ftplugin/cpp.vim as a tempoary solution. This function is inspired by compe#close.

[LimbicSys]

It seems that clangd still offers suggestions when (, , (or other characters) are typed. But other language server dose not (test on lua and python). Other completion plugs like coc and vscode's completion work with clangd well. Maybe there are addtional checks for these characters.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.