template<
    class Rule1,
    class Rule2>
constexpr
enable_if<!std::is_integral<Rule2>::value, range_rule_t<Rule1, Rule2>>::type
range_rule(
    const Rule1& first,
    const Rule2& next,
    size_t N = 0,
    size_t M = std::size_t(-1)) noexcept;