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_filebuf
14
15 // template <class charT, class traits>
16 // void
17 // swap(basic_filebuf<charT, traits>& x, basic_filebuf<charT, traits>& y);
18
19 #include <fstream>
20 #include <cassert>
21 #include "platform_support.h"
22
main()23 int main()
24 {
25 std::string temp = get_temp_file_name();
26 {
27 std::filebuf f;
28 assert(f.open(temp.c_str(), std::ios_base::out | std::ios_base::in
29 | std::ios_base::trunc) != 0);
30 assert(f.is_open());
31 assert(f.sputn("123", 3) == 3);
32 f.pubseekoff(1, std::ios_base::beg);
33 assert(f.sgetc() == '2');
34 std::filebuf f2;
35 swap(f2, f);
36 assert(!f.is_open());
37 assert(f2.is_open());
38 assert(f2.sgetc() == '2');
39 }
40 std::remove(temp.c_str());
41 {
42 std::wfilebuf f;
43 assert(f.open(temp.c_str(), std::ios_base::out | std::ios_base::in
44 | std::ios_base::trunc) != 0);
45 assert(f.is_open());
46 assert(f.sputn(L"123", 3) == 3);
47 f.pubseekoff(1, std::ios_base::beg);
48 assert(f.sgetc() == L'2');
49 std::wfilebuf f2;
50 swap(f2, f);
51 assert(!f.is_open());
52 assert(f2.is_open());
53 assert(f2.sgetc() == L'2');
54 }
55 std::remove(temp.c_str());
56 }
57