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 // class istream_iterator
13 
14 // istream_iterator& operator++();
15 
16 #include <iterator>
17 #include <sstream>
18 #include <cassert>
19 
main()20 int main()
21 {
22     std::istringstream inf(" 1 23");
23     std::istream_iterator<int> i(inf);
24     std::istream_iterator<int>& iref = ++i;
25     assert(&iref == &i);
26     int j = 0;
27     j = *i;
28     assert(j == 23);
29 }
30