member_swap.pass.cpp revision 13aaf422e49fa4b66642966bfc6078b5d9adde12 
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
20int main()
21{
22    char temp1[L_tmpnam], temp2[L_tmpnam];
23    tmpnam(temp1);
24    tmpnam(temp2);
25    {
26        std::ofstream fs1(temp1);
27        std::ofstream fs2(temp2);
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);
36        double x = 0;
37        fs >> x;
38        assert(x == 3.25);
39        fs >> x;
40        assert(x == 4.5);
41    }
42    remove(temp1);
43    {
44        std::ifstream fs(temp2);
45        double x = 0;
46        fs >> x;
47        assert(x == 4.5);
48        fs >> x;
49        assert(x == 3.25);
50    }
51    remove(temp2);
52    {
53        std::wofstream fs1(temp1);
54        std::wofstream fs2(temp2);
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);
63        double x = 0;
64        fs >> x;
65        assert(x == 3.25);
66        fs >> x;
67        assert(x == 4.5);
68    }
69    remove(temp1);
70    {
71        std::wifstream fs(temp2);
72        double x = 0;
73        fs >> x;
74        assert(x == 4.5);
75        fs >> x;
76        assert(x == 3.25);
77    }
78    remove(temp2);
79}
80