Function is_boolean

3rd/nlohmann_json/single_include/nlohmann/json.hpp:20074–20077

! @brief return whether value is a boolean This function returns true if and only if the JSON value is a boolean. @return `true` if type is boolean, `false` otherwise. @complexity Constant. @exceptionsafety No-throw guarantee: this member function never throws exceptions. @liveexample{The following code exemplifies `is_boolean()` for all JSON types.,is_boolean}

    @since version 1.0.0
    */
    constexpr bool is_boolean() const noexcept
    {
        return m_type == value_t::boolean;
    }

    /*!
    @brief return whether value is a number