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
/*
* Copyright Andrey Semashev 2007 - 2013.
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
* http://www.boost.org/LICENSE_1_0.txt)
*/
/*!
* \file explicit_operator_bool.cpp
* \author Andrey Semashev
* \date 17.07.2010
*
* \brief This test checks that explicit operator bool can be used in
* the valid contexts.
*/
#define BOOST_TEST_MODULE explicit_operator_bool
#include <boost/utility/explicit_operator_bool.hpp>
namespace {
// A test object that has the operator of explicit conversion to bool
struct checkable1
{
BOOST_EXPLICIT_OPERATOR_BOOL()
bool operator! () const
{
return false;
}
};
struct checkable2
{
BOOST_CONSTEXPR_EXPLICIT_OPERATOR_BOOL()
BOOST_CONSTEXPR bool operator! () const
{
return false;
}
};
} // namespace
int main(int, char*[])
{
checkable1 val1;
if (val1)
{
checkable2 val2;
if (val2)
return 0;
}
return 1;
}