Members

template<
    class R0_,
    class... Rn_>
constexpr
variant_rule_t<R0_, Rn_...>
variant_rule(
    const R0_& r0,
    const Rn_&... rn) noexcept;
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template<
    class R0,
    class... Rn>
constexpr
variant_rule_t<R0, Rn...>
variant_rule(
    const R0& r0,
    const Rn&... rn) noexcept;
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