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_stringstream
13 
14 // void swap(basic_stringstream& rhs);
15 
16 #include <sstream>
17 #include <cassert>
18 
19 int main(int, char**)
20 {
21     {
22         std::stringstream ss0(" 123 456 ");
23         std::stringstream ss;
24         ss.swap(ss0);
25         assert(ss.rdbuf() != 0);
26         assert(ss.good());
27         assert(ss.str() == " 123 456 ");
28         int i = 0;
29         ss >> i;
30         assert(i == 123);
31         ss >> i;
32         assert(i == 456);
33         ss << i << ' ' << 123;
34         assert(ss.str() == "456 1236 ");
35         ss0 << i << ' ' << 123;
36         assert(ss0.str() == "456 123");
37     }
38     {
39         std::wstringstream ss0(L" 123 456 ");
40         std::wstringstream ss;
41         ss.swap(ss0);
42         assert(ss.rdbuf() != 0);
43         assert(ss.good());
44         assert(ss.str() == L" 123 456 ");
45         int i = 0;
46         ss >> i;
47         assert(i == 123);
48         ss >> i;
49         assert(i == 456);
50         ss << i << ' ' << 123;
51         assert(ss.str() == L"456 1236 ");
52         ss0 << i << ' ' << 123;
53         assert(ss0.str() == L"456 123");
54     }
55 
56   return 0;
57 }
58