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
25template <class It>
26void
27test(It first, It last, typename std::iterator_traits<It>::difference_type x)
28{
29    assert(std::distance(first, last) == x);
30}
31
32int 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