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 // explicit basic_istream(basic_streambuf<charT,traits>* sb);
16 
17 #include <istream>
18 #include <cassert>
19 
20 template <class CharT>
21 struct testbuf
22     : public std::basic_streambuf<CharT>
23 {
testbuftestbuf24     testbuf() {}
25 };
26 
main()27 int main()
28 {
29     {
30         testbuf<char> sb;
31         std::basic_istream<char> is(&sb);
32         assert(is.rdbuf() == &sb);
33         assert(is.tie() == 0);
34         assert(is.fill() == ' ');
35         assert(is.rdstate() == is.goodbit);
36         assert(is.exceptions() == is.goodbit);
37         assert(is.flags() == (is.skipws | is.dec));
38         assert(is.precision() == 6);
39         assert(is.getloc().name() == "C");
40         assert(is.gcount() == 0);
41     }
42     {
43         testbuf<wchar_t> sb;
44         std::basic_istream<wchar_t> is(&sb);
45         assert(is.rdbuf() == &sb);
46         assert(is.tie() == 0);
47         assert(is.fill() == L' ');
48         assert(is.rdstate() == is.goodbit);
49         assert(is.exceptions() == is.goodbit);
50         assert(is.flags() == (is.skipws | is.dec));
51         assert(is.precision() == 6);
52         assert(is.getloc().name() == "C");
53         assert(is.gcount() == 0);
54     }
55 }
56