Re: portability of sed's \{0,1\}?

[Paul Eggert]

   From: Jim Meyering <[EMAIL PROTECTED]>
   Date: 11 Aug 2000 20:11:25 +0200

   I saw the earlier thread (on the autoconf list) on this topic where
   someone found that `?' and \| were not portable.  Has anyone found a
   system on which \{m,n\} is not portable?

Most likely, seds that don't support ? and \| also don't support
\{m,n\}, as I recall that those features were introduced to USG Unix
at about the same time.  Unix Version 7 didn't have them.