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_istream;
14 
15 // basic_istream(basic_istream&& rhs);
16 
17 #include <istream>
18 #include <cassert>
19 
20 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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 
test_istreamtest_istream36     test_istream(test_istream&& s)
37         : base(std::move(s)) {}
38 };
39 
40 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
41 
main()42 int main()
43 {
44 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
45     {
46         testbuf<char> sb;
47         test_istream<char> is1(&sb);
48         test_istream<char> is(std::move(is1));
49         assert(is1.rdbuf() == &sb);
50         assert(is1.gcount() == 0);
51         assert(is.gcount() == 0);
52         assert(is.rdbuf() == 0);
53         assert(is.tie() == 0);
54         assert(is.fill() == ' ');
55         assert(is.rdstate() == is.goodbit);
56         assert(is.exceptions() == is.goodbit);
57         assert(is.flags() == (is.skipws | is.dec));
58         assert(is.precision() == 6);
59         assert(is.getloc().name() == "C");
60     }
61     {
62         testbuf<wchar_t> sb;
63         test_istream<wchar_t> is1(&sb);
64         test_istream<wchar_t> is(std::move(is1));
65         assert(is1.gcount() == 0);
66         assert(is.gcount() == 0);
67         assert(is1.rdbuf() == &sb);
68         assert(is.rdbuf() == 0);
69         assert(is.tie() == 0);
70         assert(is.fill() == L' ');
71         assert(is.rdstate() == is.goodbit);
72         assert(is.exceptions() == is.goodbit);
73         assert(is.flags() == (is.skipws | is.dec));
74         assert(is.precision() == 6);
75         assert(is.getloc().name() == "C");
76     }
77 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
78 }
79