class REXML::Parsers::XPathParser

def RelationalExpr path, parsed
  n = []
  rest = AdditiveExpr( path, n )
  if rest != path
    while rest =~ /^\s*([<>]=?)\s*/
      if $1[0] == ?<
        sym = "lt"
      else
        sym = "gt"
      end
      sym << "eq" if $1[-1] == ?=
      n = [ sym.intern, n, [] ]
      rest = AdditiveExpr( $', n[-1] )
    end
  end
  if parsed.size == 0 and n.size != 0
    parsed.replace(n)
  elsif n.size > 0
    parsed << n
  end
  rest
end