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
|
#include <iostream>
using namespace std;
template <class T>
class PlacementNewCreator {
public:
static T *create() {
void *buf = malloc(sizeof(T));
if (!buf) return 0;
return new(buf) T;
}
};
template <class T>
class NewCreator {
public:
static T *create() {
return new T;
}
};
struct Vertex
{
float x, y, z;
};
template
<
class CreationPolicy
>
class VertexBuffer : public CreationPolicy
{
public:
void AddVertex()
{
Vertex* v = CreationPolicy::create();
}
};
typedef VertexBuffer< NewCreator<Vertex> > MyVertexBuffer;
void main()
{
MyVertexBuffer x;
x.AddVertex();
system("pause");
}
|