How to get Vim to highlight non-ascii characters?

Question

I\'m trying to get Vim to highlight non-ASCII characters. Is there an available setting, regex search pattern, or plugin to do so?

Answer 1

If you are interested also in the non printable characters use this one: /[^\x00-\xff]/

I use it in a function:

 function! NonPrintable()
   setlocal enc=utf8
   if search('[^\x00-\xff]') != 0
     call matchadd('Error', '[^\x00-\xff]')
     echo 'Non printable characters in text'
   else
     setlocal enc=latin1
     echo 'All characters are printable'
   endif
 endfunction