unique_ptr Ownership Consume

#include <iostream>
#include <cstdint>
#include <memory>
using namespace std;

// The signature now explicitly demands ownership of the unique_ptr
void consumeBuffer(unique_ptr<uint8_t[]> buffer, size_t N) {
    for (int i = 0; i < N; i++) {
        // Cast to int so it prints the number, not an ASCII character
        cout << (int)buffer[i]; 
        if (i != N-1) cout << " ";
    }
    cout << endl;
    
    // As soon as this function finishes, the buffer is automatically destroyed.
}

int main() {
    int N;
    cin >> N;

    unique_ptr<uint8_t[]> buffer = make_unique<uint8_t[]>(N);

    for (int i = 0; i < N; i++) {
        int temp;
        cin >> temp;
        buffer[i] = (uint8_t)temp;
    }

    // Transfer ownership to the function using std::move
    consumeBuffer(std::move(buffer), N);

    // Because we moved it, buffer is now guaranteed to be empty
    if (buffer == nullptr)
        cout << "No data" << endl; // This will now print!
    else
        cout << "Has data" << endl;

    return 0;
}