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27 lines
499 B
27 lines
499 B
#pragma once
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#include "gp/algorithm/move.hpp"
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namespace gp {
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template<typename iterator>
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iterator rotate(iterator first, iterator new_first, iterator last)
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{
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if(first == new_first) return last;
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if(new_first == last) return first;
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iterator in = new_first;
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iterator out = first;
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iterator mv = first;
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while(in != last) {
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if(out == mv) mv = in;
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gp::swap((*out++), (*in++));
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}
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// rotate the remaining sequence into place
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(rotate)(out, mv, last);
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return out;
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}
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}
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