std::forward_list<T,Allocator>::end, std::forward_list<T,Allocator>::cend
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std::forward_list
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iterator end() noexcept;
(1)
(since C++11) (constexpr since C++26)
const_iterator end() const noexcept;
(2)
(since C++11) (constexpr since C++26)
const_iterator cend() const noexcept;
(3)
(since C++11) (constexpr since C++26)
Returns an iterator past the last element of *this.
This returned iterator only acts as a sentinel. It is not guaranteed to be dereferenceable.
Contents
[edit] Return value
Iterator past the last element.
[edit] Complexity
Constant.
[edit] Example
Run this code
#include <algorithm> #include <iostream> #include <numeric> #include <string> #include <forward_list> int main() { std::forward_list <int> nums{1, 2, 4, 8, 16}; std::forward_list <std::string > fruits{"orange", "apple", "raspberry"}; std::forward_list <char> empty; // Print forward_list. std::for_each (nums.begin(), nums.end(), [](const int n) { std::cout << n << ' '; }); std::cout << '\n'; // Sums all integers in the forward_list nums (if any), printing only the result. std::cout << "Sum of nums: " << std::accumulate (nums.begin(), nums.end(), 0) << '\n'; // Prints the first fruit in the forward_list fruits, checking if there is any. if (!fruits.empty()) std::cout << "First fruit: " << *fruits.begin() << '\n'; if (empty.begin() == empty.end()) std::cout << "forward_list 'empty' is indeed empty.\n"; }
Output:
1 2 4 8 16 Sum of nums: 31 First fruit: orange forward_list 'empty' is indeed empty.