Vimscript: auto-highlight matching words

Here’s a small script I cobbled together for my ~/.vimrc. I use it every single day. Press <c-h> to toggle auto-highlighting of matching words in normal mode.

function! ToggleAutoHighlightMatchingWord()
  if !exists('#ToggleAutoHighlightMatchingWordGroup#CursorMoved')
    exe printf('match IncSearch /\V\<%s\>/',
      \ escape(expand('<cword>'), '/\'))
    augroup ToggleAutoHighlightMatchingWordGroup
      autocmd!
      autocmd CursorMoved * exe printf('match IncSearch /\V\<%s\>/',
            \ escape(expand('<cword>'), '/\'))
    augroup END
  else
    let currentTab = tabpagenr()
    let currentWindow = tabpagewinnr(currentTab)
    exe 'tabdo windo match IncSeach //'
    exe currentTab 'tabn'
    exe currentWindow . 'wincmd w'
    augroup ToggleAutoHighlightMatchingWordGroup
      autocmd!
    augroup END
  endif
endfunction
noremap <c-h> :call ToggleAutoHighlightMatchingWord()<CR>