swap.pass.cpp revision bc8d3f97eb5c958007f2713238472e0c1c8fe02c 
1//===----------------------------------------------------------------------===//
2//
3// ��������������������The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. 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
20template <class CharT>
21struct test
22    : public std::basic_streambuf<CharT>
23{
24    typedef std::basic_streambuf<CharT> base;
25    test() {}
26
27    void swap(test& t)
28    {
29        test old_this(*this);
30        test old_that(t);
31        base::swap(t);
32        assert(this->eback() == old_that.eback());
33        assert(this->gptr()  == old_that.gptr());
34        assert(this->egptr() == old_that.egptr());
35        assert(this->pbase() == old_that.pbase());
36        assert(this->pptr()  == old_that.pptr());
37        assert(this->epptr() == old_that.epptr());
38        assert(this->getloc() == old_that.getloc());
39
40        assert(t.eback() == old_this.eback());
41        assert(t.gptr()  == old_this.gptr());
42        assert(t.egptr() == old_this.egptr());
43        assert(t.pbase() == old_this.pbase());
44        assert(t.pptr()  == old_this.pptr());
45        assert(t.epptr() == old_this.epptr());
46        assert(t.getloc() == old_this.getloc());
47        return *this;
48    }
49
50    void setg(CharT* gbeg, CharT* gnext, CharT* gend)
51    {
52        base::setg(gbeg, gnext, gend);
53    }
54    void setp(CharT* pbeg, CharT* pend)
55    {
56        base::setp(pbeg, pend);
57    }
58};
59
60int main()
61{
62    {
63        test<char> t;
64        test<char> t2;
65        swap(t2, t);
66    }
67    {
68        test<wchar_t> t;
69        test<wchar_t> t2;
70        swap(t2, t);
71    }
72    {
73        char g1, g2, g3, p1, p3;
74        test<char> t;
75        t.setg(&g1, &g2, &g3);
76        t.setp(&p1, &p3);
77        test<char> t2;
78        swap(t2, t);
79    }
80    {
81        wchar_t g1, g2, g3, p1, p3;
82        test<wchar_t> t;
83        t.setg(&g1, &g2, &g3);
84        t.setp(&p1, &p3);
85        test<wchar_t> t2;
86        swap(t2, t);
87    }
88    std::locale::global(std::locale("en_US"));
89    {
90        test<char> t;
91        test<char> t2;
92        swap(t2, t);
93    }
94    {
95        test<wchar_t> t;
96        test<wchar_t> t2;
97        swap(t2, t);
98    }
99}
100