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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_stringstream
14 
15 // template <class charT, class traits, class Allocator>
16 //   void
17 //   swap(basic_stringstream<charT, traits, Allocator>& x,
18 //        basic_stringstream<charT, traits, Allocator>& y);
19 
20 #include <sstream>
21 #include <cassert>
22 
main()23 int main()
24 {
25     {
26         std::stringstream ss0(" 123 456 ");
27         std::stringstream ss;
28         swap(ss, ss0);
29         assert(ss.rdbuf() != 0);
30         assert(ss.good());
31         assert(ss.str() == " 123 456 ");
32         int i = 0;
33         ss >> i;
34         assert(i == 123);
35         ss >> i;
36         assert(i == 456);
37         ss << i << ' ' << 123;
38         assert(ss.str() == "456 1236 ");
39         ss0 << i << ' ' << 123;
40         assert(ss0.str() == "456 123");
41     }
42     {
43         std::wstringstream ss0(L" 123 456 ");
44         std::wstringstream ss;
45         swap(ss, ss0);
46         assert(ss.rdbuf() != 0);
47         assert(ss.good());
48         assert(ss.str() == L" 123 456 ");
49         int i = 0;
50         ss >> i;
51         assert(i == 123);
52         ss >> i;
53         assert(i == 456);
54         ss << i << ' ' << 123;
55         assert(ss.str() == L"456 1236 ");
56         ss0 << i << ' ' << 123;
57         assert(ss0.str() == L"456 123");
58     }
59 }
60