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// unspecified operator[](difference_type n) const; 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, 25 typename std::iterator_traits<It>::value_type x) 26{ 27 typedef typename std::iterator_traits<It>::value_type value_type; 28 const std::reverse_iterator<It> r(i); 29 value_type rr = r[n]; 30 assert(rr == x); 31} 32 33int main() 34{ 35 const char* s = "1234567890"; 36 test(random_access_iterator<const char*>(s+5), 4, '1'); 37 test(s+5, 4, '1'); 38} 39