[#B90DF7D6FC12879DE2E1FF5CDCD7C63D46A5E04D]

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        <h2>Function variant_rule</h2>
        
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        <h3>Synopsis</h3>
        <div>
            <code>
                            </code>
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        <pre class="source-code cpp">
            template<
    class R0_,
    class... Rn_>
constexpr
variant_rule_t<R0_, Rn_...>
variant_rule(
    R0_ const& r0,
    Rn_ const&... rn) noexcept;
        </pre>
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