member_swap.pass.cpp revision b64f8b07c104c6cc986570ac8ee0ed16a9f23976
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// <istream>
11
12// template <class charT, class traits = char_traits<charT> >
13// class basic_iostream;
14
15// void swap(basic_iostream& rhs);
16
17#include <istream>
18#include <cassert>
19
20template <class CharT>
21struct testbuf
22    : public std::basic_streambuf<CharT>
23{
24    testbuf() {}
25};
26
27template <class CharT>
28struct test_iostream
29    : public std::basic_iostream<CharT>
30{
31    typedef std::basic_iostream<CharT> base;
32    test_iostream(testbuf<CharT>* sb) : base(sb) {}
33
34    void swap(test_iostream& s) {base::swap(s);}
35};
36
37int main()
38{
39    {
40        testbuf<char> sb1;
41        testbuf<char> sb2;
42        test_iostream<char> is1(&sb1);
43        test_iostream<char> is2(&sb2);
44        is1.swap(is2);
45        assert(is1.rdbuf() == &sb1);
46        assert(is1.tie() == 0);
47        assert(is1.fill() == ' ');
48        assert(is1.rdstate() == is1.goodbit);
49        assert(is1.exceptions() == is1.goodbit);
50        assert(is1.flags() == (is1.skipws | is1.dec));
51        assert(is1.precision() == 6);
52        assert(is1.getloc().name() == "C");
53        assert(is2.rdbuf() == &sb2);
54        assert(is2.tie() == 0);
55        assert(is2.fill() == ' ');
56        assert(is2.rdstate() == is2.goodbit);
57        assert(is2.exceptions() == is2.goodbit);
58        assert(is2.flags() == (is2.skipws | is2.dec));
59        assert(is2.precision() == 6);
60        assert(is2.getloc().name() == "C");
61    }
62    {
63        testbuf<wchar_t> sb1;
64        testbuf<wchar_t> sb2;
65        test_iostream<wchar_t> is1(&sb1);
66        test_iostream<wchar_t> is2(&sb2);
67        is1.swap(is2);
68        assert(is1.rdbuf() == &sb1);
69        assert(is1.tie() == 0);
70        assert(is1.fill() == ' ');
71        assert(is1.rdstate() == is1.goodbit);
72        assert(is1.exceptions() == is1.goodbit);
73        assert(is1.flags() == (is1.skipws | is1.dec));
74        assert(is1.precision() == 6);
75        assert(is1.getloc().name() == "C");
76        assert(is2.rdbuf() == &sb2);
77        assert(is2.tie() == 0);
78        assert(is2.fill() == ' ');
79        assert(is2.rdstate() == is2.goodbit);
80        assert(is2.exceptions() == is2.goodbit);
81        assert(is2.flags() == (is2.skipws | is2.dec));
82        assert(is2.precision() == 6);
83        assert(is2.getloc().name() == "C");
84    }
85}
86