std::forward_list pop_front() method

od C++11

// Non const version only
constexpr void pop_back();

Removes the first element of the container.

Undefined Behavior

Calling pop_front() on an empty container results in undefined behavior

.

Invalidation

Iterators and references to the last element, are invalidated.

Parameters

(none)

Return value

(none)

Complexity

Constant - O(1).

Exceptions

(none)

Example

Main.cpp

#include <forward_list>
#include <iostream>

int main()
{
    std::forward_list<char> chars{'A', 'B', 'C', 'D'};

    for (; !chars.empty(); chars.pop_front())
    {
        std::cout << "chars.front(): '" << chars.front() << "'\n";
    }
}

Output

chars.front(): 'A'
chars.front(): 'B'
chars.front(): 'C'
chars.front(): 'D'