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_istream;
13 
14 // basic_istream& operator=(basic_istream&& rhs);
15 
16 #include <istream>
17 #include <cassert>
18 
19 #include "test_macros.h"
20 
21 
22 template <class CharT>
23 struct testbuf
24     : public std::basic_streambuf<CharT>
25 {
testbuftestbuf26     testbuf() {}
27 };
28 
29 template <class CharT>
30 struct test_istream
31     : public std::basic_istream<CharT>
32 {
33     typedef std::basic_istream<CharT> base;
test_istreamtest_istream34     test_istream(testbuf<CharT>* sb) : base(sb) {}
35 
operator =test_istream36     test_istream& operator=(test_istream&& s)
37         {base::operator=(std::move(s)); return *this;}
38 };
39 
40 
main(int,char **)41 int main(int, char**)
42 {
43     {
44         testbuf<char> sb1;
45         testbuf<char> sb2;
46         test_istream<char> is1(&sb1);
47         test_istream<char> is2(&sb2);
48         is2 = (std::move(is1));
49         assert(is1.rdbuf() == &sb1);
50         assert(is1.tie() == 0);
51         assert(is1.fill() == ' ');
52         assert(is1.rdstate() == is1.goodbit);
53         assert(is1.exceptions() == is1.goodbit);
54         assert(is1.flags() == (is1.skipws | is1.dec));
55         assert(is1.precision() == 6);
56         assert(is1.getloc().name() == "C");
57         assert(is2.rdbuf() == &sb2);
58         assert(is2.tie() == 0);
59         assert(is2.fill() == ' ');
60         assert(is2.rdstate() == is2.goodbit);
61         assert(is2.exceptions() == is2.goodbit);
62         assert(is2.flags() == (is2.skipws | is2.dec));
63         assert(is2.precision() == 6);
64         assert(is2.getloc().name() == "C");
65     }
66 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
67     {
68         testbuf<wchar_t> sb1;
69         testbuf<wchar_t> sb2;
70         test_istream<wchar_t> is1(&sb1);
71         test_istream<wchar_t> is2(&sb2);
72         is2 = (std::move(is1));
73         assert(is1.rdbuf() == &sb1);
74         assert(is1.tie() == 0);
75         assert(is1.fill() == ' ');
76         assert(is1.rdstate() == is1.goodbit);
77         assert(is1.exceptions() == is1.goodbit);
78         assert(is1.flags() == (is1.skipws | is1.dec));
79         assert(is1.precision() == 6);
80         assert(is1.getloc().name() == "C");
81         assert(is2.rdbuf() == &sb2);
82         assert(is2.tie() == 0);
83         assert(is2.fill() == ' ');
84         assert(is2.rdstate() == is2.goodbit);
85         assert(is2.exceptions() == is2.goodbit);
86         assert(is2.flags() == (is2.skipws | is2.dec));
87         assert(is2.precision() == 6);
88         assert(is2.getloc().name() == "C");
89     }
90 #endif
91 
92   return 0;
93 }
94