如何为我的vimgrep结果模式着色

:echo has("syntax")

syntax enable

function! HighlightVimgrepResults()
  let @/ = ''
  if exists('g:vimgrep_highlight_matches')
    call clearmatches()
  endif
  let g:vimgrep_highlight_matches = []
  for item in getqflist()
    if item.valid
      let pattern = '\V' . escape(item.text, '\')
      call add(g:vimgrep_highlight_matches, pattern)
      let @/ = pattern
      break
    endif
  endfor
  if !empty(g:vimgrep_highlight_matches)
    call feedkeys("\<Plug>(incsearch-nohl-n)\<Plug>(incsearch-nohl-n)", 'n')
  endif
endfunction

autocmd QuickFixCmdPost *grep call HighlightVimgrepResults()