Function is_xdigit

example/cacheHierarchy/fkYAML/node.hpp:6043–6045

@brief Check if the given character is a hex-digit. @note This function is needed to avoid assertion failures in `std::isxdigit()` especially when compiled with MSVC. @param c A character to be checked. @return true if the given character is a hex-digit, false otherwise.

    /// @param c A character to be checked.
    /// @return true if the given character is a hex-digit, false otherwise.
    static bool is_xdigit(char c) {
        return (('0' <= c && c <= '9') || ('A' <= c && c <= 'F') || ('a' <= c && c <= 'f'));
    }
};

FK_YAML_DETAIL_NAMESPACE_END