1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <ostream>
// template <class charT, class traits = char_traits<charT> >
// class basic_ostream::sentry;
// ~sentry();
#include <ostream>
#include <cassert>
#include "test_macros.h"
int sync_called = 0;
template <class CharT>
struct testbuf1
: public std::basic_streambuf<CharT>
{
testbuf1() {}
protected:
int virtual sync()
{
++sync_called;
return 1;
}
};
int main()
{
{
std::ostream os((std::streambuf*)0);
std::ostream::sentry s(os);
assert(!bool(s));
}
assert(sync_called == 0);
{
testbuf1<char> sb;
std::ostream os(&sb);
std::ostream::sentry s(os);
assert(bool(s));
}
assert(sync_called == 0);
{
testbuf1<char> sb;
std::ostream os(&sb);
std::ostream::sentry s(os);
assert(bool(s));
unitbuf(os);
}
assert(sync_called == 1);
#ifndef TEST_HAS_NO_EXCEPTIONS
{
testbuf1<char> sb;
std::ostream os(&sb);
try
{
std::ostream::sentry s(os);
assert(bool(s));
unitbuf(os);
throw 1;
}
catch (...)
{
}
assert(sync_called == 1);
}
#endif
}
|
