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
|
/************************************************************************
************************************************************************
FAUST compiler
Copyright (C) 2003-2018 GRAME, Centre National de Creation Musicale
---------------------------------------------------------------------
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
************************************************************************
************************************************************************/
#ifndef _SMARTPOINTER_H
#define _SMARTPOINTER_H
#include <cstdio>
#include <cstdlib>
template <class T>
class P {
private:
T* p;
public:
P() : p(0) {}
P(T* rawptr) : p(rawptr) {}
P(const P& ptr) : p((T*)ptr) {}
template <class T2>
P(const P<T2>& ptr) : p((T*)ptr)
{
}
~P() {}
operator T*() const { return p; }
T& operator*() const
{
if (p == 0) {
// throw std::runtime_error("Null dereference in P<?>::operator*() const ");
fprintf(stderr, "Null dereference in P<?>::operator*() const \n ");
exit(1);
}
return *p;
}
T* operator->() const
{
if (p == 0) {
fprintf(stderr, "Null dereference in P<?>::operator->() const \n ");
// throw std::runtime_error("Null dereference in P<?>::operator->() const ");
// std::cerr << "Null dereference in P<?>::operator->() const " << std::endl;
exit(1);
}
return p;
}
T* pointee() const { return p; }
P& operator=(T* p_)
{
p = p_;
return *this;
}
P& operator=(const P<T>& p_) { return operator=((T*)p_); }
template <class T2>
P& cast(T2* p_)
{
return operator=(dynamic_cast<T*>(p_));
}
template <class T2>
P& cast(const P<T2>& p_)
{
return operator=(dynamic_cast<T*>(p_));
}
};
#endif
|
