difference_type.pass.cpp revision 83e2c4d877fe2d7793868b1c6a5d9525a7c4d431 
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// template <RandomAccessIterator Iterator>
15//   reverse_iterator<Iter>
16//   operator+(Iter::difference_type n, const reverse_iterator<Iter>& x);
17
18#include <iterator>
19#include <cassert>
20
21#include "test_iterators.h"
22
23template <class It>
24void
25test(It i, typename std::iterator_traits<It>::difference_type n, It x)
26{
27    const std::reverse_iterator<It> r(i);
28    std::reverse_iterator<It> rr = n + r;
29    assert(rr.base() == x);
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