Function insert

src/fl/stl/vector.h:294–311

    }

    bool insert(iterator pos, const T &value) FL_NOEXCEPT {
        if (current_size >= N) {
            return false;
        }

        // Construct a new element at end() position using placement new
        new (end()) T();
        ++current_size;

        // Shift elements from [pos, end-1) to the right by one position
        for (iterator p = end() - 1; p > pos; --p) {
            *p = fl::move(*(p - 1));
        }

        // Assign the new value to the insertion position
        *pos = value;
        return true;
    }

    // Move version of insert
    bool insert(iterator pos, T &&value) FL_NOEXCEPT {