Method capacity

src/prevector.h:260–266

    const_iterator end() const { return const_iterator(item_ptr(size())); }

    size_t capacity() const {
        if (is_direct()) {
            return N;
        } else {
            return _union.indirect_contents.capacity;
        }
    }

    T& operator[](size_type pos) {
        return *item_ptr(pos);