patch 8.2.2805: Vim9: cannot use legacy syntax in Vim9 script Commit: https://github.com/vim/vim/commit/96cf4ba8fb96e5778192d2dab7458b9a7da0a49d Author: Bram Moolenaar <Bram@vim.org> Date: Sat Apr 24 14:15:41 2021 +0200 patch 8.2.2805: Vim9: cannot use legacy syntax in Vim9 script Problem: Vim9: cannot use legacy syntax in Vim9 script. Solution: Add the :legacy command.

" Provide 'PrintVer' command to print the interface versions.

func s:print_ver(lang, ...)
  if has(a:lang)
    exec a:lang join(a:000)
  else
    echo 'N/A'
  endif
  echo ''
endfunc

command -nargs=+ PrintVer call <SID>print_ver(<f-args>)