Function surrogate

include/boost/parser/detail/text/transcode_iterator.hpp:141–144

Returns true iff `c` is a Unicode surrogate. */

    /** Returns true iff `c` is a Unicode surrogate. */
    inline constexpr bool surrogate(char32_t c)
    {
        return high_surrogate_min <= c && c <= low_surrogate_max;
    }

    /** Returns true iff `c` is a Unicode high surrogate. */
    inline constexpr bool high_surrogate(char32_t c)