How to jump to location of completion from another file?

Question

In Vim, oftens I happen to be using some completion that vim provides for me in the Ctrl n/Ctrl p menu. If the completion happens to be from some other file, I know that Vim knows where it comes from as well, since it's able to display the file name that contains the completion for me.

Sometimes, after making use of the completion, I'd like to jump directly to the said file to inspect further. Is this possible?

Answer 1

Vim has no way to know which buffer contains the definition of the term or its utilization.

It looks to me that what you ask is to find where the term has been used in the opened buffers.

You can achieve that with the following custom command

function! Vimgrepall(pattern)
  call setqflist([])
  exe 'bufdo vimgrepadd ' . a:pattern . ' %'
  cnext
endfunction
command! -nargs=1 FindOccurences call Vimgrepall(<f-args>)

From the VimWiki: Search on all opened buffers

If you want to exclude the current buffer from the search you could do:

function! Vimgrepall(pattern)
  let current_buffer = bufnr('%')
  call setqflist([])
  let buffers = filter(range(1, bufnr('$')), 'bufexists(v:val)')
  for buffer in buffers
    if buffer == current_buffer ||bufname(buffer) == '' || !buflisted(buffer)
      continue
    endif
    
    silent! exe 'vimgrepadd ' . a:pattern . ' ' . escape(bufname(buffer), ' ')
  endfor

  cnext
endfunction

command! -nargs=1 FindOccurences call Vimgrepall(<f-args>)