member_swap.pass.cpp revision 06d8bf6ce2008526732ae40ad46f7ff031c409e7 
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//===----------------------------------------------------------------------===//
25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//
35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//                     The LLVM Compiler Infrastructure
45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//
55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This file is dual licensed under the MIT and the University of Illinois Open
65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Source Licenses. See LICENSE.TXT for details.
75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//
85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//===----------------------------------------------------------------------===//
95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// <fstream>
115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// template <class charT, class traits = char_traits<charT> >
135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// class basic_fstream
145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
15// void swap(basic_fstream& rhs);
16
17#include <fstream>
18#include <cassert>
19#include "platform_support.h"
20
21int main()
22{
23    std::string temp1 = get_temp_file_name();
24    std::string temp2 = get_temp_file_name();
25    {
26        std::fstream fs1(temp1.c_str(), std::ios_base::in | std::ios_base::out
27                                                  | std::ios_base::trunc);
28        std::fstream fs2(temp2.c_str(), std::ios_base::in | std::ios_base::out
29                                                  | std::ios_base::trunc);
30        fs1 << 1 << ' ' << 2;
31        fs2 << 2 << ' ' << 1;
32        fs1.seekg(0);
33        fs1.swap(fs2);
34        fs1.seekg(0);
35        int i;
36        fs1 >> i;
37        assert(i == 2);
38        fs1 >> i;
39        assert(i == 1);
40        i = 0;
41        fs2 >> i;
42        assert(i == 1);
43        fs2 >> i;
44        assert(i == 2);
45    }
46    std::remove(temp1.c_str());
47    std::remove(temp2.c_str());
48    {
49        std::wfstream fs1(temp1.c_str(), std::ios_base::in | std::ios_base::out
50                                                   | std::ios_base::trunc);
51        std::wfstream fs2(temp2.c_str(), std::ios_base::in | std::ios_base::out
52                                                   | std::ios_base::trunc);
53        fs1 << 1 << ' ' << 2;
54        fs2 << 2 << ' ' << 1;
55        fs1.seekg(0);
56        fs1.swap(fs2);
57        fs1.seekg(0);
58        int i;
59        fs1 >> i;
60        assert(i == 2);
61        fs1 >> i;
62        assert(i == 1);
63        i = 0;
64        fs2 >> i;
65        assert(i == 1);
66        fs2 >> i;
67        assert(i == 2);
68    }
69    std::remove(temp1.c_str());
70    std::remove(temp2.c_str());
71}
72