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
24template <class CharT>
25struct 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
63int main(int, char**)
64{
65 {
66 test<char> t;
67 test<char> t2;
68 t2.swap(t);
69 }
70 {
71 char g[3];
72 char p[3];
73 test<char> t;
74 t.setg(gbeg: &g[0], gnext: &g[1], gend: &g[2]);
75 t.setp(pbeg: &p[0], pend: &p[2]);
76 test<char> t2;
77 t2.swap(t);
78 }
79#ifndef TEST_HAS_NO_WIDE_CHARACTERS
80 {
81 test<wchar_t> t;
82 test<wchar_t> t2;
83 t2.swap(t);
84 }
85 {
86 wchar_t g[3];
87 wchar_t p[3];
88 test<wchar_t> t;
89 t.setg(gbeg: &g[0], gnext: &g[1], gend: &g[2]);
90 t.setp(pbeg: &p[0], pend: &p[2]);
91 test<wchar_t> t2;
92 t2.swap(t);
93 }
94#endif
95 std::locale::global(std::locale(LOCALE_en_US_UTF_8));
96 {
97 test<char> t;
98 test<char> t2;
99 t2.swap(t);
100 }
101#ifndef TEST_HAS_NO_WIDE_CHARACTERS
102 {
103 test<wchar_t> t;
104 test<wchar_t> t2;
105 t2.swap(t);
106 }
107#endif
108
109 return 0;
110}
111

source code of libcxx/test/std/input.output/stream.buffers/streambuf/streambuf.protected/streambuf.assign/swap.pass.cpp