1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // <ostream>
10 
11 // template <class charT, class traits = char_traits<charT> >
12 // class basic_ostream;
13 
14 // void swap(basic_ostream& rhs);
15 
16 #include <ostream>
17 #include <cassert>
18 
19 #include "test_macros.h"
20 
21 template <class CharT>
22 struct testbuf
23     : public std::basic_streambuf<CharT>
24 {
testbuftestbuf25     testbuf() {}
26 };
27 
28 template <class CharT>
29 struct test_ostream
30     : public std::basic_ostream<CharT>
31 {
32     typedef std::basic_ostream<CharT> base;
test_ostreamtest_ostream33     test_ostream(testbuf<CharT>* sb) : base(sb) {}
34 
swaptest_ostream35     void swap(test_ostream& s) {base::swap(s);}
36 };
37 
main(int,char **)38 int main(int, char**)
39 {
40     {
41         testbuf<char> sb1;
42         testbuf<char> sb2;
43         test_ostream<char> os1(&sb1);
44         test_ostream<char> os2(&sb2);
45         os1.swap(os2);
46         assert(os1.rdbuf() == &sb1);
47         assert(os1.tie() == 0);
48         assert(os1.fill() == ' ');
49         assert(os1.rdstate() == os1.goodbit);
50         assert(os1.exceptions() == os1.goodbit);
51         assert(os1.flags() == (os1.skipws | os1.dec));
52         assert(os1.precision() == 6);
53         assert(os1.getloc().name() == "C");
54         assert(os2.rdbuf() == &sb2);
55         assert(os2.tie() == 0);
56         assert(os2.fill() == ' ');
57         assert(os2.rdstate() == os2.goodbit);
58         assert(os2.exceptions() == os2.goodbit);
59         assert(os2.flags() == (os2.skipws | os2.dec));
60         assert(os2.precision() == 6);
61         assert(os2.getloc().name() == "C");
62     }
63     {
64         testbuf<wchar_t> sb1;
65         testbuf<wchar_t> sb2;
66         test_ostream<wchar_t> os1(&sb1);
67         test_ostream<wchar_t> os2(&sb2);
68         os1.swap(os2);
69         assert(os1.rdbuf() == &sb1);
70         assert(os1.tie() == 0);
71         assert(os1.fill() == ' ');
72         assert(os1.rdstate() == os1.goodbit);
73         assert(os1.exceptions() == os1.goodbit);
74         assert(os1.flags() == (os1.skipws | os1.dec));
75         assert(os1.precision() == 6);
76         assert(os1.getloc().name() == "C");
77         assert(os2.rdbuf() == &sb2);
78         assert(os2.tie() == 0);
79         assert(os2.fill() == ' ');
80         assert(os2.rdstate() == os2.goodbit);
81         assert(os2.exceptions() == os2.goodbit);
82         assert(os2.flags() == (os2.skipws | os2.dec));
83         assert(os2.precision() == 6);
84         assert(os2.getloc().name() == "C");
85     }
86 
87   return 0;
88 }
89