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 // template <class charT, class traits, class Allocator>
15 //   void
16 //   swap(basic_stringstream<charT, traits, Allocator>& x,
17 //        basic_stringstream<charT, traits, Allocator>& y);
18 
19 #include <sstream>
20 #include <cassert>
21 
22 #include "test_macros.h"
23 
24 int main(int, char**)
25 {
26     {
27         std::stringstream ss0(" 123 456 ");
28         std::stringstream ss;
29         swap(ss, ss0);
30         assert(ss.rdbuf() != 0);
31         assert(ss.good());
32         assert(ss.str() == " 123 456 ");
33         int i = 0;
34         ss >> i;
35         assert(i == 123);
36         ss >> i;
37         assert(i == 456);
38         ss << i << ' ' << 123;
39         assert(ss.str() == "456 1236 ");
40         ss0 << i << ' ' << 123;
41         assert(ss0.str() == "456 123");
42     }
43     {
44         std::wstringstream ss0(L" 123 456 ");
45         std::wstringstream ss;
46         swap(ss, ss0);
47         assert(ss.rdbuf() != 0);
48         assert(ss.good());
49         assert(ss.str() == L" 123 456 ");
50         int i = 0;
51         ss >> i;
52         assert(i == 123);
53         ss >> i;
54         assert(i == 456);
55         ss << i << ' ' << 123;
56         assert(ss.str() == L"456 1236 ");
57         ss0 << i << ' ' << 123;
58         assert(ss0.str() == L"456 123");
59     }
60 
61   return 0;
62 }
63