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// template <InputIterator Iter>
13//   void advance(Iter& i, Iter::difference_type n);
14//
15// template <BidirectionalIterator Iter>
16//   void advance(Iter& i, Iter::difference_type n);
17//
18// template <RandomAccessIterator Iter>
19//   void advance(Iter& i, Iter::difference_type n);
20
21#include <iterator>
22#include <cassert>
23
24#include "test_iterators.h"
25
26template <class It>
27void
28test(It i, typename std::iterator_traits<It>::difference_type n, It x)
29{
30    std::advance(i, n);
31    assert(i == x);
32}
33
34int main()
35{
36    const char* s = "1234567890";
37    test(input_iterator<const char*>(s), 10, input_iterator<const char*>(s+10));
38    test(forward_iterator<const char*>(s), 10, forward_iterator<const char*>(s+10));
39    test(bidirectional_iterator<const char*>(s+5), 5, bidirectional_iterator<const char*>(s+10));
40    test(bidirectional_iterator<const char*>(s+5), -5, bidirectional_iterator<const char*>(s));
41    test(random_access_iterator<const char*>(s+5), 5, random_access_iterator<const char*>(s+10));
42    test(random_access_iterator<const char*>(s+5), -5, random_access_iterator<const char*>(s));
43    test(s+5, 5, s+10);
44    test(s+5, -5, s);
45}
46