1bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===//
2bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//
3f5256e16dfc425c1d466f6308d4026d529ce9e0bHoward Hinnant//                     The LLVM Compiler Infrastructure
4bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//
5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open
6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details.
7bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//
8bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===//
9bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
10bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// <ostream>
11bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
12bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// template <class charT, class traits = char_traits<charT> >
13bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//   class basic_ostream;
14bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// basic_ostream& flush();
16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <ostream>
18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert>
19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
20bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint sync_called = 0;
21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnanttemplate <class CharT>
23bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantclass testbuf
24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    : public std::basic_streambuf<CharT>
25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{
26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantpublic:
27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    testbuf()
28bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    {
29bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    }
30bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
31bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantprotected:
32bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    virtual int
34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        sync()
35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        {
36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant            if (sync_called++ == 1)
37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant                return -1;
38bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant            return 0;
39bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        }
40bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant};
41bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
42bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main()
43bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{
44bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    {
45bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        testbuf<char> sb;
46bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        std::ostream os(&sb);
47bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        os.flush();
48bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(os.good());
49bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(sync_called == 1);
50bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        os.flush();
51bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(os.bad());
52bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant        assert(sync_called == 2);
53bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant    }
54bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant}
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