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_stringbuf
14 
15 // template <class charT, class traits, class Allocator>
16 //   void swap(basic_stringbuf<charT, traits, Allocator>& x,
17 //             basic_stringbuf<charT, traits, Allocator>& y);
18 
19 #include <sstream>
20 #include <cassert>
21 
22 int main()
23 {
24     {
25         std::stringbuf buf1("testing");
26         std::stringbuf buf;
27         swap(buf, buf1);
28         assert(buf.str() == "testing");
29         assert(buf1.str() == "");
30     }
31     {
32         std::stringbuf buf1("testing", std::ios_base::in);
33         std::stringbuf buf;
34         swap(buf, buf1);
35         assert(buf.str() == "testing");
36         assert(buf1.str() == "");
37     }
38     {
39         std::stringbuf buf1("testing", std::ios_base::out);
40         std::stringbuf buf;
41         swap(buf, buf1);
42         assert(buf.str() == "testing");
43         assert(buf1.str() == "");
44     }
45     {
46         std::wstringbuf buf1(L"testing");
47         std::wstringbuf buf;
48         swap(buf, buf1);
49         assert(buf.str() == L"testing");
50         assert(buf1.str() == L"");
51     }
52     {
53         std::wstringbuf buf1(L"testing", std::ios_base::in);
54         std::wstringbuf buf;
55         swap(buf, buf1);
56         assert(buf.str() == L"testing");
57         assert(buf1.str() == L"");
58     }
59     {
60         std::wstringbuf buf1(L"testing", std::ios_base::out);
61         std::wstringbuf buf;
62         swap(buf, buf1);
63         assert(buf.str() == L"testing");
64         assert(buf1.str() == L"");
65     }
66 }
67