boost_smart_ptr 0.1.0

Boost C++ library boost_smart_ptr packaged using Zanbil
Documentation 
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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134

// Copyright 2021 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt

#include <boost/shared_ptr.hpp>
#include <boost/core/lightweight_test.hpp>
#include <boost/config.hpp>
#include <boost/config/pragma_message.hpp>
#include <memory>
#include <utility>

struct Y
{
    static int instances;

    bool deleted_;

    Y(): deleted_( false )
    {
        ++instances;
    }

    ~Y()
    {
        BOOST_TEST( deleted_ );
        --instances;
    }

private:

    Y( Y const & );
    Y & operator=( Y const & );
};

int Y::instances = 0;

struct YD
{
    bool moved_;

    YD(): moved_( false )
    {
    }

    YD( YD&& r ): moved_( false )
    {
        r.moved_ = true;
    }

    void operator()( Y* p ) const
    {
        BOOST_TEST( !moved_ );

        if( p )
        {
            p->deleted_ = true;
            delete p;
        }
        else
        {
            BOOST_ERROR( "YD::operator()(0) called" );
        }
    }

private:

    YD( YD const & );
    YD & operator=( YD const & );
};

int main()
{
    BOOST_TEST( Y::instances == 0 );

    {
        std::unique_ptr<Y, YD> p( new Y );
        BOOST_TEST( Y::instances == 1 );

        boost::shared_ptr<Y> p2( std::move( p ) );

        BOOST_TEST( Y::instances == 1 );
        BOOST_TEST( p.get() == 0 );
        BOOST_TEST( p.get_deleter().moved_ );

        p2.reset();
        BOOST_TEST( Y::instances == 0 );
    }

    {
        std::unique_ptr<Y, YD> p( new Y );
        BOOST_TEST( Y::instances == 1 );

        boost::shared_ptr<void> p2( std::move( p ) );

        BOOST_TEST( Y::instances == 1 );
        BOOST_TEST( p.get() == 0 );
        BOOST_TEST( p.get_deleter().moved_ );

        p2.reset();
        BOOST_TEST( Y::instances == 0 );
    }

    {
        std::unique_ptr<Y, YD> p( new Y );
        BOOST_TEST( Y::instances == 1 );

        boost::shared_ptr<Y> p2;
        p2 = std::move( p );

        BOOST_TEST( Y::instances == 1 );
        BOOST_TEST( p.get() == 0 );
        BOOST_TEST( p.get_deleter().moved_ );

        p2.reset();
        BOOST_TEST( Y::instances == 0 );
    }

    {
        std::unique_ptr<Y, YD> p( new Y );
        BOOST_TEST( Y::instances == 1 );

        boost::shared_ptr<void> p2( new int(0) );
        p2 = std::move( p );

        BOOST_TEST( Y::instances == 1 );
        BOOST_TEST( p.get() == 0 );
        BOOST_TEST( p.get_deleter().moved_ );

        p2.reset();
        BOOST_TEST( Y::instances == 0 );
    }

    return boost::report_errors();
}