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I saw this post on Stack Overflow asking the same question but the response simply was "Don’t use feedkeys, here is a different solution." Well I have a use case where I think I do need feedkeys. Here is my function:

function! OpenCompletion()
    if !pumvisible()
        if (v:char == '/' || v:char == '$' || v:char == '~' || v:char == '.')
            call feedkeys("\<c-x>\<c-f>")
        elseif ((v:char >= 'a' && v:char <= 'z') || (v:char >= 'A' && v:char <= 'Z') || (v:char >= '0' || v:char == '0'))
            call feedkeys("\<plug>vim_completes_me_forward")
        endif
    endif
endfunction

autocmd insertcharpre * call OpenCompletion()

I want it to run the commands silently so that it doesn't show any messages at the bottom. Also, apparently this is impossible with feedkeys(). So I am trying to do it with getcompletion().

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    please explain, what you mean with silently. What exactly do you want to hide? Commented Aug 12, 2022 at 6:21
  • I want to hide the messages that appear on the bottom of the window.
    – Amarakon
    Commented Aug 12, 2022 at 17:18
  • You can't really do that; feedkeys() is as-if you typed the keys yourself, in your case <C-x><C-f>. You can use something like getcompletion('<cword>', 'file'), maybe in combination with complete(), but it's not entirely clear what you want to do. But basically: if you don't want things to behave exactly like it would like you're using it from insert mode, then feedkeys() is the wrong choice. Commented Aug 12, 2022 at 17:49
  • I understand. How can I create a menu of the results getcompletion()? For example: echo getcompletion('call ', 'cmdline') will print to the screen but I want it in a popup menu instead. It is not clear from the documentation how to do this.
    – Amarakon
    Commented Aug 12, 2022 at 20:23
  • Something like complete(col('.'), getcompletion('<cword>', 'file')) I think, but I never used these functions before either so not 100% sure 😅 It would probably be best if you would edit your answer to better describe what behaviour/goal you're looking for, because now that's a bit unclear to me, so hard to tell what the best option is. Also, you seem to be using VimCompletesMe, and maybe that already has a feature for this. Commented Aug 12, 2022 at 21:35

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