Method empty

include/boost/stacktrace/detail/frame_decl.hpp:140–140

@brief Checks that frame references NULL address. @returns `true` if `this->address() == 0` @b Complexity: O(1) @b Async-Handler-Safety: Safe.

    ///
    /// @b Async-Handler-Safety: Safe.
    constexpr bool empty() const noexcept { return !address(); }
};