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 // <fstream>
11 
12 // template <class charT, class traits = char_traits<charT> >
13 // class basic_ofstream
14 
15 // void swap(basic_ofstream& rhs);
16 
17 #include <fstream>
18 #include <cassert>
19 #include "platform_support.h"
20 
main()21 int main()
22 {
23     std::string temp1 = get_temp_file_name();
24     std::string temp2 = get_temp_file_name();
25     {
26         std::ofstream fs1(temp1.c_str());
27         std::ofstream fs2(temp2.c_str());
28         fs1 << 3.25;
29         fs2 << 4.5;
30         fs1.swap(fs2);
31         fs1 << ' ' << 3.25;
32         fs2 << ' ' << 4.5;
33     }
34     {
35         std::ifstream fs(temp1.c_str());
36         double x = 0;
37         fs >> x;
38         assert(x == 3.25);
39         fs >> x;
40         assert(x == 4.5);
41     }
42     std::remove(temp1.c_str());
43     {
44         std::ifstream fs(temp2.c_str());
45         double x = 0;
46         fs >> x;
47         assert(x == 4.5);
48         fs >> x;
49         assert(x == 3.25);
50     }
51     std::remove(temp2.c_str());
52     {
53         std::wofstream fs1(temp1.c_str());
54         std::wofstream fs2(temp2.c_str());
55         fs1 << 3.25;
56         fs2 << 4.5;
57         fs1.swap(fs2);
58         fs1 << ' ' << 3.25;
59         fs2 << ' ' << 4.5;
60     }
61     {
62         std::wifstream fs(temp1.c_str());
63         double x = 0;
64         fs >> x;
65         assert(x == 3.25);
66         fs >> x;
67         assert(x == 4.5);
68     }
69     std::remove(temp1.c_str());
70     {
71         std::wifstream fs(temp2.c_str());
72         double x = 0;
73         fs >> x;
74         assert(x == 4.5);
75         fs >> x;
76         assert(x == 3.25);
77     }
78     std::remove(temp2.c_str());
79 }
80