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 // <istream>
10 
11 // template <class charT, class traits = char_traits<charT> >
12 // class basic_iostream;
13 
14 // basic_iostream& operator=(basic_iostream&& rhs);
15 
16 #include <istream>
17 #include <cassert>
18 #include <streambuf>
19 
20 #include "test_macros.h"
21 
22 
23 template <class CharT>
24 struct testbuf
25     : public std::basic_streambuf<CharT>
26 {
27     testbuf() {}
28 };
29 
30 template <class CharT>
31 struct test_iostream
32     : public std::basic_iostream<CharT>
33 {
34     typedef std::basic_iostream<CharT> base;
35     test_iostream(testbuf<CharT>* sb) : base(sb) {}
36 
37     test_iostream& operator=(test_iostream&& s)
38         {base::operator=(std::move(s)); return *this;}
39 };
40 
41 
42 int main(int, char**)
43 {
44     {
45         testbuf<char> sb1;
46         testbuf<char> sb2;
47         test_iostream<char> is1(&sb1);
48         test_iostream<char> is2(&sb2);
49         is2 = (std::move(is1));
50         assert(is1.rdbuf() == &sb1);
51         assert(is1.tie() == 0);
52         assert(is1.fill() == ' ');
53         assert(is1.rdstate() == is1.goodbit);
54         assert(is1.exceptions() == is1.goodbit);
55         assert(is1.flags() == (is1.skipws | is1.dec));
56         assert(is1.precision() == 6);
57         assert(is1.getloc().name() == "C");
58         assert(is2.rdbuf() == &sb2);
59         assert(is2.tie() == 0);
60         assert(is2.fill() == ' ');
61         assert(is2.rdstate() == is2.goodbit);
62         assert(is2.exceptions() == is2.goodbit);
63         assert(is2.flags() == (is2.skipws | is2.dec));
64         assert(is2.precision() == 6);
65         assert(is2.getloc().name() == "C");
66     }
67 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
68     {
69         testbuf<wchar_t> sb1;
70         testbuf<wchar_t> sb2;
71         test_iostream<wchar_t> is1(&sb1);
72         test_iostream<wchar_t> is2(&sb2);
73         is2 = (std::move(is1));
74         assert(is1.rdbuf() == &sb1);
75         assert(is1.tie() == 0);
76         assert(is1.fill() == ' ');
77         assert(is1.rdstate() == is1.goodbit);
78         assert(is1.exceptions() == is1.goodbit);
79         assert(is1.flags() == (is1.skipws | is1.dec));
80         assert(is1.precision() == 6);
81         assert(is1.getloc().name() == "C");
82         assert(is2.rdbuf() == &sb2);
83         assert(is2.tie() == 0);
84         assert(is2.fill() == ' ');
85         assert(is2.rdstate() == is2.goodbit);
86         assert(is2.exceptions() == is2.goodbit);
87         assert(is2.flags() == (is2.skipws | is2.dec));
88         assert(is2.precision() == 6);
89         assert(is2.getloc().name() == "C");
90     }
91 #endif
92 
93   return 0;
94 }
95