WvStreams
delete.h
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1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2  *
3  * XPLC - Cross-Platform Lightweight Components
4  * Copyright (C) 2004, Net Integration Technologies, Inc.
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public License
8  * as published by the Free Software Foundation; either version 2.1 of
9  * the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful, but
12  * WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19  * USA
20  *
21  * As a special exception, you may use this file as part of a free
22  * software library without restriction. Specifically, if other files
23  * instantiate templates or use macros or inline functions from this
24  * file, or you compile this file and link it with other files to
25  * produce an executable, this file does not by itself cause the
26  * resulting executable to be covered by the GNU Lesser General Public
27  * License. This exception does not however invalidate any other
28  * reasons why the executable file might be covered by the GNU Lesser
29  * General Public License.
30  */
31 
32 #ifndef __XPLC_DELETE_H__
33 #define __XPLC_DELETE_H__
34 
35 #if defined(__GNUC__) && __GNUC__ > 3
36 # pragma GCC system_header
37 #endif
38 
46 #include <new>
47 #include <memory>
48 
49 #ifdef __XPLC_IOBJECT_H__
50 #error "<xplc/delete.h> has to be included before <xplc/IObject.h>."
51 #endif
52 
53 #include <xplc/IObject.h>
54 
59 class CheckIObject {};
61 class CheckIObjectOk {};
64 
65 template<class T>
67 {
68 public:
70  typedef char Yes;
72  struct No { char dummy[2]; };
73  static T* from;
74  static Yes test(const IObject*);
75  static No test(...);
77 };
78 
79 template<bool>
81 template<>
83 struct XPLC_CTAssert<true> {};
84 
85 template<class T>
86 inline void operator&&(CheckIObject, const T* obj) {
87  static_cast<void>(sizeof(XPLC_CTAssert<(sizeof(ConversionIObject<T>::test(ConversionIObject<T>::from)) != sizeof(typename ConversionIObject<T>::Yes))>));
88  delete obj;
89 }
90 
91 template<class T>
92 inline void operator&&(CheckIObjectOk, const T* obj) {
93  delete obj;
94 }
95 
96 template<class T>
97 inline void operator&&(CheckIObjectOkVector, const T* obj) {
98  delete[] obj;
99 }
100 
101 
106 #undef xplcdelete
107 
114 #define xplcdelete CheckIObjectOk() &&
115 
122 #define delete CheckIObject() &&
123 
129 #define deletev CheckIObjectOkVector() &&
130 
131 #endif /* __XPLC_DELETE_H__ */
IObject.h
XPLC_CTAssert
Definition: delete.h:80
ConversionIObject
Definition: delete.h:66
IObject
Definition: IObject.h:65
CheckIObjectOkVector
Definition: delete.h:63
CheckIObject
Definition: delete.h:60
ConversionIObject::No
Definition: delete.h:72
CheckIObjectOk
Definition: delete.h:61