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
|
// See
// https://en.cppreference.com/w/cpp/memory/new/operator_new
// and
// https://en.cppreference.com/w/cpp/memory/new/operator_delete
// Some of these are only used in very special circumstances
// so rather then using new and delete expressions most calls
// here directly call the operators
#include <cstdlib>
#include <new>
#include <iostream>
class alignas(64) MyClass {
public:
int i;
};
class OrdinaryClass {
public:
int i;
};
int main() {
// THROWING
// plain versions
// cppreference new number 1
OrdinaryClass* oClass = new OrdinaryClass();
// cppreference delete number 1
operator delete(oClass);
// cppreference new number 2
OrdinaryClass* oClass5 = new OrdinaryClass[5];
// cppreference delete number 2
operator delete[](oClass5);
// aligned versions
// cppreference new number 3
MyClass* myClass = new MyClass();
// cppreference delete number 3
operator delete(myClass, std::align_val_t(64U));
// cppreference new number 4
MyClass* myClass5 = new MyClass[5];
// cppreference delete number 4
operator delete[](myClass5, std::align_val_t(64U));
// sized versions
oClass = new OrdinaryClass();
// cppreference delete number 5
operator delete(oClass, sizeof(OrdinaryClass));
oClass5 = new OrdinaryClass[5];
// cppreference delete number 6
operator delete[](oClass5, sizeof(OrdinaryClass)*5);
// sized aligned versions
myClass = new MyClass();
// cppreference delete number 7
operator delete(myClass, sizeof(*myClass), std::align_val_t(64U));
myClass5 = new MyClass[5];
// cppreference delete number 8
operator delete [](myClass5, sizeof(*myClass)*5, std::align_val_t(64U));
// NOTHROW
// cppreference new number 5
oClass = new (std::nothrow) OrdinaryClass;
delete oClass;
// cppreference new number 6
oClass5 = new (std::nothrow) OrdinaryClass[5];
delete [] oClass5;
// cppreference new number 7
myClass = new (std::nothrow) MyClass;
delete myClass;
// cppreference new number 8
myClass5 = new (std::nothrow) MyClass[5];
delete [] myClass5;
}
|
