Method get_number_float

native/thirdpart/json/json.hpp:8464–8467

return floating-point value

    /// return floating-point value
    constexpr number_float_t get_number_float() const noexcept
    {
        return value_float;
    }

    /// return current string value (implicitly resets the token; useful only once)
    string_t& get_string()