redo LABEL

     redo    The redo command restarts  the  loop  block  without
             evaluating  the  conditional  again.   The  continue
             block, if any, is not executed.   If  the  LABEL  is
             omitted, the command refers to the innermost enclos-
             ing loop.  This command is normally used by programs
             that  want  to lie to themselves about what was just
             input:

                  # a simpleminded Pascal comment stripper
                  # (warning: assumes no { or } in strings)
                  line: while (<STDIN>) {
                       while (s|({.*}.*){.*}|$1 |) {}
                       s|{.*}| |;
                       if (s|{.*| |) {
                            $front = $_;
                            while (<STDIN>) {
                                 if (/}/) {     # end of comment?
                                      s|^|$front{|;
                                      redo line;
                                 }
                            }
                       }
                       print;
                  }