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
|
/*
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/config.hpp>
#if !defined(BOOST_NO_CXX11_ALLOCATOR)
#include <boost/core/alloc_construct.hpp>
#include <boost/core/lightweight_test.hpp>
#if defined(_MSC_VER)
# pragma warning(disable: 4100) // unreferenced parameter 'ptr'
#endif
class type {
public:
explicit type(int x)
: value_(x) { }
int value() const {
return value_;
}
static int count;
private:
type(const type&);
type& operator=(const type&);
int value_;
};
int type::count = 0;
template<class T>
struct creator {
typedef T value_type;
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 V>
void construct(type* ptr, const V& value) {
::new(static_cast<void*>(ptr)) type(value + 1);
++type::count;
}
void destroy(type* ptr) {
ptr->~type();
--type::count;
}
};
int main()
{
creator<type> a;
type* p = a.allocate(1);
boost::alloc_construct(a, p, 1);
BOOST_TEST_EQ(type::count, 1);
BOOST_TEST_EQ(p->value(), 2);
boost::alloc_destroy(a, p);
BOOST_TEST_EQ(type::count, 0);
a.deallocate(p, 1);
return boost::report_errors();
}
#else
int main()
{
return 0;
}
#endif
|
