1//===----------------------------------------------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is dual licensed under the MIT and the University of Illinois Open 6// Source Licenses. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10// <iterator> 11 12// reverse_iterator 13 14// requires RandomAccessIterator<Iter> 15// reverse_iterator& operator+=(difference_type n); 16 17#include <iterator> 18#include <cassert> 19 20#include "test_iterators.h" 21 22template <class It> 23void 24test(It i, typename std::iterator_traits<It>::difference_type n, It x) 25{ 26 std::reverse_iterator<It> r(i); 27 std::reverse_iterator<It>& rr = r += n; 28 assert(r.base() == x); 29 assert(&rr == &r); 30} 31 32int main() 33{ 34 const char* s = "1234567890"; 35 test(random_access_iterator<const char*>(s+5), 5, random_access_iterator<const char*>(s)); 36 test(s+5, 5, s); 37} 38