std::forward_list pop_front() method
- since 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'
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