[#215697D2124C7693864ACB1087916405062A5077]

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        <h2>Function <a href="#">digit_chars_t</a>::
operator()</h2>
        
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        <h3>Synopsis</h3>
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            <code>
                            </code>
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        <pre class="source-code cpp">
            constexpr
bool
operator()(char c) const noexcept;
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