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