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// <ostream>
11
12// template <class charT, class traits = char_traits<charT> >
13//   class basic_ostream;
14
15// template <class charT, class traits>
16//   basic_ostream<charT,traits>& flush(basic_ostream<charT,traits>& os);
17
18#include <ostream>
19#include <cassert>
20
21int sync_called = 0;
22
23template <class CharT>
24class testbuf
25    : public std::basic_streambuf<CharT>
26{
27public:
28    testbuf()
29    {
30    }
31
32protected:
33
34    virtual int
35        sync()
36        {
37            ++sync_called;
38            return 0;
39        }
40};
41
42int main()
43{
44    {
45        testbuf<char> sb;
46        std::ostream os(&sb);
47        flush(os);
48        assert(sync_called == 1);
49        assert(os.good());
50    }
51    {
52        testbuf<wchar_t> sb;
53        std::wostream os(&sb);
54        flush(os);
55        assert(sync_called == 2);
56        assert(os.good());
57    }
58}
59