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) const; 16 17 #include <iterator> 18 #include <cassert> 19 20 #include "test_iterators.h" 21 22 template <class It> 23 void test(It i,typename std::iterator_traits<It>::difference_type n,It x)24test(It i, typename std::iterator_traits<It>::difference_type n, It x) 25 { 26 const std::reverse_iterator<It> r(i); 27 std::reverse_iterator<It> rr = r - n; 28 assert(rr.base() == x); 29 } 30 main()31int main() 32 { 33 const char* s = "1234567890"; 34 test(random_access_iterator<const char*>(s+5), 5, random_access_iterator<const char*>(s+10)); 35 test(s+5, 5, s+10); 36 } 37