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 // <ostream>
11 
12 // template <class charT, class traits = char_traits<charT> >
13 // class basic_ostream;
14 
15 // void swap(basic_ostream& rhs);
16 
17 #include <ostream>
18 #include <cassert>
19 
20 template <class CharT>
21 struct testbuf
22     : public std::basic_streambuf<CharT>
23 {
testbuftestbuf24     testbuf() {}
25 };
26 
27 template <class CharT>
28 struct test_ostream
29     : public std::basic_ostream<CharT>
30 {
31     typedef std::basic_ostream<CharT> base;
test_ostreamtest_ostream32     test_ostream(testbuf<CharT>* sb) : base(sb) {}
33 
swaptest_ostream34     void swap(test_ostream& s) {base::swap(s);}
35 };
36 
main()37 int main()
38 {
39     {
40         testbuf<char> sb1;
41         testbuf<char> sb2;
42         test_ostream<char> os1(&sb1);
43         test_ostream<char> os2(&sb2);
44         os1.swap(os2);
45         assert(os1.rdbuf() == &sb1);
46         assert(os1.tie() == 0);
47         assert(os1.fill() == ' ');
48         assert(os1.rdstate() == os1.goodbit);
49         assert(os1.exceptions() == os1.goodbit);
50         assert(os1.flags() == (os1.skipws | os1.dec));
51         assert(os1.precision() == 6);
52         assert(os1.getloc().name() == "C");
53         assert(os2.rdbuf() == &sb2);
54         assert(os2.tie() == 0);
55         assert(os2.fill() == ' ');
56         assert(os2.rdstate() == os2.goodbit);
57         assert(os2.exceptions() == os2.goodbit);
58         assert(os2.flags() == (os2.skipws | os2.dec));
59         assert(os2.precision() == 6);
60         assert(os2.getloc().name() == "C");
61     }
62     {
63         testbuf<wchar_t> sb1;
64         testbuf<wchar_t> sb2;
65         test_ostream<wchar_t> os1(&sb1);
66         test_ostream<wchar_t> os2(&sb2);
67         os1.swap(os2);
68         assert(os1.rdbuf() == &sb1);
69         assert(os1.tie() == 0);
70         assert(os1.fill() == ' ');
71         assert(os1.rdstate() == os1.goodbit);
72         assert(os1.exceptions() == os1.goodbit);
73         assert(os1.flags() == (os1.skipws | os1.dec));
74         assert(os1.precision() == 6);
75         assert(os1.getloc().name() == "C");
76         assert(os2.rdbuf() == &sb2);
77         assert(os2.tie() == 0);
78         assert(os2.fill() == ' ');
79         assert(os2.rdstate() == os2.goodbit);
80         assert(os2.exceptions() == os2.goodbit);
81         assert(os2.flags() == (os2.skipws | os2.dec));
82         assert(os2.precision() == 6);
83         assert(os2.getloc().name() == "C");
84     }
85 }
86