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std::forward_list<T,Allocator>:: reverse

From cppreference.net

C++
Containers library
std::forward_list
Member functions
Non-member functions
(until C++20) (until C++20) (until C++20) (until C++20) (until C++20)
Deduction guides (C++17)
void reverse ( ) noexcept ;
(since C++11)
(constexpr since C++26)

Reverses the order of the elements in the container.

No references or iterators become invalidated.

Complexity

Linear in the size of the container.

Example

Run this code 
#include <iostream>
#include <forward_list>
std::ostream& operator<<(std::ostream& ostr, const std::forward_list<int>& list)
{
    for (auto& i : list)
        ostr << ' ' << i;
    return ostr;
}
int main()
{
    std::forward_list<int> list = {8, 7, 5, 9, 0, 1, 3, 2, 6, 4};
    std::cout << "initially: " << list << '\n';
    list.sort();
    std::cout << "ascending: " << list << '\n';
    list.reverse();
    std::cout << "descending:" << list << '\n';
}

Output: 

initially:  8 7 5 9 0 1 3 2 6 4
ascending:  0 1 2 3 4 5 6 7 8 9
descending: 9 8 7 6 5 4 3 2 1 0

See also

sorts the elements
(public member function)