std::list::pop_back(3)

🌸 NAME 🌸

okay bestie, this is the page for std::list::pop_back(3) from the C++ Standard Libary manual — yes, “Libary,” that’s the manual’s spelling, not mine 💅. The whole NAME line is literally std::list::pop_back — std::list::pop_back, iconic redundancy, we move.

✨ Synopsis ✨

void pop_back();

She removes the last element of the container. That’s the whole job, and she does it.

Calling pop_back on an empty container results in undefined behavior. No cap, do not do this. That’s the danger zone 💀.

References and iterators to the erased element are invalidated. The ones pointing at the erased element, periodt.

🧚 Parameters 🧚

(none) — not a single parameter, bestie.

🎀 Return value 🎀

(none) — she returns nothing, she’s too busy serving.

🌈 Complexity 🌈

Constant. Chill.

💜 Exceptions 💜

Throws nothing. Zero drama, zero throwing.

🦋 Example 🦋

The original says // Run this code, so here’s the code:

// Run this code

#include <list>
#include <iostream>

template<typename T>
void print(T const& xs)
{
    std::cout << "[ ";
    for (auto const& x : xs)
        std::cout << x << ' ';
    std::cout << "]\n";
}

int main()
{
    std::list<int> numbers;

    print(numbers);

    numbers.push_back(5);
    numbers.push_back(3);
    numbers.push_back(4);

    print(numbers);

    numbers.pop_back();

    print(numbers);
}

📤 Output 📤

[ ]
[ 5 3 4 ]
[ 5 3 ]

👑 See also 👑

• pop_front removes the first element (public member function)
• push_back adds an element to the end (public member function)

mwah 💋 this one came from source http://cppreference.com, version/date 2024.06.10, and the footer tag std::list::pop_back(3) — that’s the whole footer folded into a cute lil sign-off 🫶✨