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
21template <class CharT>
22struct testbuf
23 : public std::basic_streambuf<CharT>
24{
25 testbuf() {}
26};
27
28template <class CharT>
29struct test_ostream
30 : public std::basic_ostream<CharT>
31{
32 typedef std::basic_ostream<CharT> base;
33 test_ostream(testbuf<CharT>* sb) : base(sb) {}
34
35 void swap(test_ostream& s) {base::swap(s);}
36};
37
38int 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(s&: 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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
64 {
65 testbuf<wchar_t> sb1;
66 testbuf<wchar_t> sb2;
67 test_ostream<wchar_t> os1(&sb1);
68 test_ostream<wchar_t> os2(&sb2);
69 os1.swap(os2);
70 assert(os1.rdbuf() == &sb1);
71 assert(os1.tie() == 0);
72 assert(os1.fill() == ' ');
73 assert(os1.rdstate() == os1.goodbit);
74 assert(os1.exceptions() == os1.goodbit);
75 assert(os1.flags() == (os1.skipws | os1.dec));
76 assert(os1.precision() == 6);
77 assert(os1.getloc().name() == "C");
78 assert(os2.rdbuf() == &sb2);
79 assert(os2.tie() == 0);
80 assert(os2.fill() == ' ');
81 assert(os2.rdstate() == os2.goodbit);
82 assert(os2.exceptions() == os2.goodbit);
83 assert(os2.flags() == (os2.skipws | os2.dec));
84 assert(os2.precision() == 6);
85 assert(os2.getloc().name() == "C");
86 }
87#endif
88
89 return 0;
90}
91

source code of libcxx/test/std/input.output/iostream.format/output.streams/ostream.assign/member_swap.pass.cpp