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

/*
Copyright 2019 Glen Joseph Fernandes
(glenjofe@gmail.com)

Distributed under the Boost Software License, Version 1.0.
(http://www.boost.org/LICENSE_1_0.txt)
*/
#include <boost/smart_ptr/allocate_unique.hpp>
#include <boost/core/lightweight_test.hpp>
#include <boost/config.hpp>

template<class T = void>
struct creator {
    typedef T value_type;
    typedef T* pointer;

    template<class U>
    struct rebind {
        typedef creator<U> other;
    };

    creator() { }

    template<class U>
    creator(const creator<U>&) { }

    T* allocate(std::size_t size) {
        return static_cast<T*>(::operator new(sizeof(T) * size));
    }

    void deallocate(T* ptr, std::size_t) {
        ::operator delete(ptr);
    }
};

template<class T, class U>
inline bool
operator==(const creator<T>&, const creator<U>&)
{
    return true;
}

template<class T, class U>
inline bool
operator!=(const creator<T>&, const creator<U>&)
{
    return false;
}

class type {
public:
    static unsigned instances;

    type()
        : value_(0.0) {
        ++instances;
    }

    ~type() {
        --instances;
    }

    void set(long double value) {
        value_ = value;
    }

    long double get() const {
        return value_;
    }

private:
    type(const type&);
    type& operator=(const type&);

    long double value_;
};

unsigned type::instances = 0;

int main()
{
    {
        std::unique_ptr<int,
            boost::alloc_deleter<int,
            boost::noinit_adaptor<creator<int> > > > result =
            boost::allocate_unique_noinit<int>(creator<int>());
        BOOST_TEST(result.get() != 0);
    }
    {
        std::unique_ptr<const int,
            boost::alloc_deleter<const int,
            boost::noinit_adaptor<creator<> > > > result =
            boost::allocate_unique_noinit<const int>(creator<>());
        BOOST_TEST(result.get() != 0);
    }
    {
        std::unique_ptr<type,
            boost::alloc_deleter<type,
            boost::noinit_adaptor<creator<type> > > > result =
            boost::allocate_unique_noinit<type>(creator<type>());
        BOOST_TEST(result.get() != 0);
        BOOST_TEST(type::instances == 1);
        result.reset();
        BOOST_TEST(type::instances == 0);
    }
    {
        std::unique_ptr<const type,
            boost::alloc_deleter<const type,
            boost::noinit_adaptor<creator<> > > > result =
            boost::allocate_unique_noinit<const type>(creator<>());
        BOOST_TEST(result.get() != 0);
        BOOST_TEST(type::instances == 1);
        result.reset();
        BOOST_TEST(type::instances == 0);
    }
    return boost::report_errors();
}