std::rotate_copy is an STL algorithm to rotate-copy a container to another container.


#include <algorithm>

#include <cassert>

#include <vector>



int main()

{

  std::vector<int> v;

  v.push_back(0);

  v.push_back(1);

  v.push_back(2);

  std::vector<int> w;

  //Rotate-copy and let v[1] be the new w[0]

  //(and v[2] be w[1])

  //(and v[0] be w[2])

  std::rotate_copy(v.begin(),v.begin()+1,v.end(),std::back_inserter(w));

  assert(w[0]==1);

  assert(w[1]==2);

  assert(w[2]==0);

}

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(C++) std::rotate_copy