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
26 template <class It>
27 void
test(It i,typename std::iterator_traits<It>::difference_type n,It x)28 test(It i, typename std::iterator_traits<It>::difference_type n, It x)
29 {
30 std::advance(i, n);
31 assert(i == x);
32 }
33
main()34 int 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