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