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 // <sstream>
11 
12 // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
13 // class basic_istringstream
14 
15 // void swap(basic_istringstream& rhs);
16 
17 #include <sstream>
18 #include <cassert>
19 
main()20 int main()
21 {
22     {
23         std::istringstream ss0(" 123 456");
24         std::istringstream ss(" 789 321");
25         ss.swap(ss0);
26         assert(ss.rdbuf() != 0);
27         assert(ss.good());
28         assert(ss.str() == " 123 456");
29         int i = 0;
30         ss >> i;
31         assert(i == 123);
32         ss >> i;
33         assert(i == 456);
34         ss0 >> i;
35         assert(i == 789);
36         ss0 >> i;
37         assert(i == 321);
38     }
39     {
40         std::wistringstream ss0(L" 123 456");
41         std::wistringstream ss(L" 789 321");
42         ss.swap(ss0);
43         assert(ss.rdbuf() != 0);
44         assert(ss.good());
45         assert(ss.str() == L" 123 456");
46         int i = 0;
47         ss >> i;
48         assert(i == 123);
49         ss >> i;
50         assert(i == 456);
51         ss0 >> i;
52         assert(i == 789);
53         ss0 >> i;
54         assert(i == 321);
55     }
56 }
57