The following code example is taken from the book
C++20 - The Complete Guide
by Nicolai M. Josuttis,
Leanpub, 2021
The code is licensed under a
Creative Commons Attribution 4.0 International License.
// raw code
#include <iostream>
#include <vector>
#include <algorithm>
#include <ranges>
void print (const auto& coll)
{
for (const auto& elem : coll) {
std::cout << elem << ' ';
}
std::cout << '\n';
}
int main()
{
std::vector coll{1, 2, 3, 4, 5, 6, 7, 8};
print(coll);
// shift one element to the front (returns new end):
std::shift_left(coll.begin(), coll.end(), 1);
print(coll);
// shift three elements to the back (returns new begin):
auto newbeg = std::shift_right(coll.begin(), coll.end(), 3);
print(coll);
print(std::ranges::subrange{newbeg, coll.end()});
}