1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // <sstream>
10 
11 // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
12 // class basic_stringbuf
13 
14 // void swap(basic_stringbuf& rhs);
15 
16 #include <sstream>
17 #include <cassert>
18 
19 int main(int, char**)
20 {
21     {
22         std::stringbuf buf1("testing");
23         std::stringbuf buf;
24         buf.swap(buf1);
25         assert(buf.str() == "testing");
26         assert(buf1.str() == "");
27     }
28     {
29         std::stringbuf buf1("testing", std::ios_base::in);
30         std::stringbuf buf;
31         buf.swap(buf1);
32         assert(buf.str() == "testing");
33         assert(buf1.str() == "");
34     }
35     {
36         std::stringbuf buf1("testing", std::ios_base::out);
37         std::stringbuf buf;
38         buf.swap(buf1);
39         assert(buf.str() == "testing");
40         assert(buf1.str() == "");
41     }
42     {
43         std::wstringbuf buf1(L"testing");
44         std::wstringbuf buf;
45         buf.swap(buf1);
46         assert(buf.str() == L"testing");
47         assert(buf1.str() == L"");
48     }
49     {
50         std::wstringbuf buf1(L"testing", std::ios_base::in);
51         std::wstringbuf buf;
52         buf.swap(buf1);
53         assert(buf.str() == L"testing");
54         assert(buf1.str() == L"");
55     }
56     {
57         std::wstringbuf buf1(L"testing", std::ios_base::out);
58         std::wstringbuf buf;
59         buf.swap(buf1);
60         assert(buf.str() == L"testing");
61         assert(buf1.str() == L"");
62     }
63 
64   return 0;
65 }
66