Function size

include/boost/stacktrace/stacktrace.hpp:247–249

@returns Number of function names stored inside the class. @b Complexity: O(1) @b Async-Handler-Safety: \asyncsafe.

    ///
    /// @b Async-Handler-Safety: \asyncsafe.
    size_type size() const noexcept {
        return impl_.size();
    }

    /// @param frame_no Zero based index of frame to return. 0
    /// is the function index where stacktrace was constructed and