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 // REQUIRES: locale.en_US.UTF-8
10 
11 // <streambuf>
12 
13 // template <class charT, class traits = char_traits<charT> >
14 // class basic_streambuf;
15 
16 // void swap(basic_streambuf& rhs);
17 
18 #include <streambuf>
19 #include <cassert>
20 
21 #include "test_macros.h"
22 #include "platform_support.h" // locale name macros
23 
24 template <class CharT>
25 struct test
26     : public std::basic_streambuf<CharT>
27 {
28     typedef std::basic_streambuf<CharT> base;
29     test() {}
30 
31     void swap(test& t)
32     {
33         test old_this(*this);
34         test old_that(t);
35         base::swap(t);
36         assert(this->eback() == old_that.eback());
37         assert(this->gptr()  == old_that.gptr());
38         assert(this->egptr() == old_that.egptr());
39         assert(this->pbase() == old_that.pbase());
40         assert(this->pptr()  == old_that.pptr());
41         assert(this->epptr() == old_that.epptr());
42         assert(this->getloc() == old_that.getloc());
43 
44         assert(t.eback() == old_this.eback());
45         assert(t.gptr()  == old_this.gptr());
46         assert(t.egptr() == old_this.egptr());
47         assert(t.pbase() == old_this.pbase());
48         assert(t.pptr()  == old_this.pptr());
49         assert(t.epptr() == old_this.epptr());
50         assert(t.getloc() == old_this.getloc());
51     }
52 
53     void setg(CharT* gbeg, CharT* gnext, CharT* gend)
54     {
55         base::setg(gbeg, gnext, gend);
56     }
57     void setp(CharT* pbeg, CharT* pend)
58     {
59         base::setp(pbeg, pend);
60     }
61 };
62 
63 int main(int, char**)
64 {
65     {
66         test<char> t;
67         test<char> t2;
68         t2.swap(t);
69     }
70     {
71         char g1, g2, g3, p1, p3;
72         test<char> t;
73         t.setg(&g1, &g2, &g3);
74         t.setp(&p1, &p3);
75         test<char> t2;
76         t2.swap(t);
77     }
78 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
79     {
80         test<wchar_t> t;
81         test<wchar_t> t2;
82         t2.swap(t);
83     }
84     {
85         wchar_t g1, g2, g3, p1, p3;
86         test<wchar_t> t;
87         t.setg(&g1, &g2, &g3);
88         t.setp(&p1, &p3);
89         test<wchar_t> t2;
90         t2.swap(t);
91     }
92 #endif
93     std::locale::global(std::locale(LOCALE_en_US_UTF_8));
94     {
95         test<char> t;
96         test<char> t2;
97         t2.swap(t);
98     }
99 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
100     {
101         test<wchar_t> t;
102         test<wchar_t> t2;
103         t2.swap(t);
104     }
105 #endif
106 
107   return 0;
108 }
109