def t_B_SEQUENCE_COMPACT_START(self, t):
        r"""
          \-\ + (?=  -\   )
          #          ^ ^ sequence indicator
        | \-\ + (?=  [\{\[]\   |  [^:\n]*:\s   )
          #            ^ ^          ^^^ map indicator
          #            ^ ^ flow indicator
        """

        indent_status, curr_depth, next_depth = self.get_indent_status(t)

        if indent_status == 'INDENT':
            self.indent_stack.append(next_depth)
            return t

        msg = dedent("""
            expected 'INDENT', got  {indent_status!r}
            current_depth:          {curr_depth}
            next_depth:             {next_depth}
            token:                  {t}
        """).format(**vars())

        raise YAMLUnknownSyntaxError(msg)
r"""
          \-\ + (?=  -\   )
          #          ^ ^ sequence indicator
        | \-\ + (?=  [\{\[]\   |  [^:\n]*:\s   )
          #            ^ ^          ^^^ map indicator
          #            ^ ^ flow indicator