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 // explicit basic_istream(basic_streambuf<charT,traits>* sb);
15 
16 #include <istream>
17 #include <cassert>
18 
19 #include "test_macros.h"
20 
21 template <class CharT>
22 struct testbuf
23     : public std::basic_streambuf<CharT>
24 {
25     testbuf() {}
26 };
27 
28 int main(int, char**)
29 {
30     {
31         testbuf<char> sb;
32         std::basic_istream<char> is(&sb);
33         assert(is.rdbuf() == &sb);
34         assert(is.tie() == 0);
35         assert(is.fill() == ' ');
36         assert(is.rdstate() == is.goodbit);
37         assert(is.exceptions() == is.goodbit);
38         assert(is.flags() == (is.skipws | is.dec));
39         assert(is.precision() == 6);
40         assert(is.getloc().name() == "C");
41         assert(is.gcount() == 0);
42     }
43 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
44     {
45         testbuf<wchar_t> sb;
46         std::basic_istream<wchar_t> is(&sb);
47         assert(is.rdbuf() == &sb);
48         assert(is.tie() == 0);
49         assert(is.fill() == L' ');
50         assert(is.rdstate() == is.goodbit);
51         assert(is.exceptions() == is.goodbit);
52         assert(is.flags() == (is.skipws | is.dec));
53         assert(is.precision() == 6);
54         assert(is.getloc().name() == "C");
55         assert(is.gcount() == 0);
56     }
57 #endif
58 
59   return 0;
60 }
61