member_swap.pass.cpp revision b64f8b07c104c6cc986570ac8ee0ed16a9f23976 
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// void swap(basic_filebuf& rhs);
16
17#include <fstream>
18#include <cassert>
19
20int main()
21{
22    {
23        std::filebuf f;
24        assert(f.open("test.dat", std::ios_base::out | std::ios_base::in
25                                                     | std::ios_base::trunc) != 0);
26        assert(f.is_open());
27        assert(f.sputn("123", 3) == 3);
28        f.pubseekoff(1, std::ios_base::beg);
29        assert(f.sgetc() == '2');
30        std::filebuf f2;
31        f2.swap(f);
32        assert(!f.is_open());
33        assert(f2.is_open());
34        assert(f2.sgetc() == '2');
35    }
36    remove("test.dat");
37    {
38        std::wfilebuf f;
39        assert(f.open("test.dat", std::ios_base::out | std::ios_base::in
40                                                     | std::ios_base::trunc) != 0);
41        assert(f.is_open());
42        assert(f.sputn(L"123", 3) == 3);
43        f.pubseekoff(1, std::ios_base::beg);
44        assert(f.sgetc() == L'2');
45        std::wfilebuf f2;
46        f2.swap(f);
47        assert(!f.is_open());
48        assert(f2.is_open());
49        assert(f2.sgetc() == L'2');
50    }
51    remove("test.dat");
52}
53