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noexceptions.h
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1
15 /***********************************************************************
16 Copyright (c) 2005-2007 by Educational Technology Resources, Inc.
17 Others may also hold copyrights on code in this file. See the
18 CREDITS.txt file in the top directory of the distribution for details.
19
20 This file is part of MySQL++.
21
22 MySQL++ is free software; you can redistribute it and/or modify it
23 under the terms of the GNU Lesser General Public License as published
24 by the Free Software Foundation; either version 2.1 of the License, or
25 (at your option) any later version.
26
27 MySQL++ is distributed in the hope that it will be useful, but WITHOUT
28 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
29 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
30 License for more details.
31
32 You should have received a copy of the GNU Lesser General Public
33 License along with MySQL++; if not, write to the Free Software
34 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
35 USA
36 ***********************************************************************/
37
38 #ifndef MYSQLPP_NOEXCEPTIONS_H
39 #define MYSQLPP_NOEXCEPTIONS_H
40
41 #include "common.h"
42
43 namespace mysqlpp {
44
45 #if !defined(DOXYGEN_IGNORE)
46 // Make Doxygen ignore this
47 class MYSQLPP_EXPORT NoExceptions;
48 #endif
49
70
71 class MYSQLPP_EXPORT OptionalExceptions
72 {
73 public:
77 OptionalExceptions(bool e = true) :
78 exceptions_(e)
79 {
80 }
81
83 virtual ~OptionalExceptions() { }
84
86 void enable_exceptions() const { exceptions_ = true; }
87
89 void disable_exceptions() const { exceptions_ = false; }
90
92 bool throw_exceptions() const { return exceptions_; }
93
94 protected:
99 void set_exceptions(bool e) const { exceptions_ = e; }
100
103 friend class NoExceptions;
104
105 private:
106 mutable bool exceptions_;
107 };
108
109
118
119 class MYSQLPP_EXPORT NoExceptions
120 {
121 public:
127 NoExceptions(const OptionalExceptions& a) :
128 assoc_(a),
129 exceptions_were_enabled_(a.throw_exceptions())
130 {
131 assoc_.disable_exceptions();
132 }
133
137 ~NoExceptions()
138 {
139 assoc_.set_exceptions(exceptions_were_enabled_);
140 }
141
142 private:
143 const OptionalExceptions& assoc_;
144 bool exceptions_were_enabled_;
145
146 // Hidden assignment operator and copy ctor, because we should not
147 // be copied.
148 NoExceptions(const NoExceptions&);
149 NoExceptions& operator=(const NoExceptions&);
150 };
151
152 } // end namespace mysqlpp
153
154 #endif // MYSQLPP_NOEXCEPTIONS_H
155
mysqlpp::OptionalExceptions::enable_exceptions
void enable_exceptions() const
Enable exceptions from the object.
Definition: noexceptions.h:86
mysqlpp::NoExceptions
Disable exceptions in an object derived from OptionalExceptions.
Definition: noexceptions.h:119
mysqlpp::OptionalExceptions::set_exceptions
void set_exceptions(bool e) const
Sets the exception state to a particular value.
Definition: noexceptions.h:99
mysqlpp::OptionalExceptions::OptionalExceptions
OptionalExceptions(bool e=true)
Default constructor.
Definition: noexceptions.h:77
mysqlpp::OptionalExceptions
Interface allowing a class to have optional exceptions.
Definition: noexceptions.h:71
mysqlpp::OptionalExceptions::throw_exceptions
bool throw_exceptions() const
Returns true if exceptions are enabled.
Definition: noexceptions.h:92
mysqlpp::NoExceptions::~NoExceptions
~NoExceptions()
Destructor.
Definition: noexceptions.h:137
mysqlpp::OptionalExceptions::~OptionalExceptions
virtual ~OptionalExceptions()
Destroy object.
Definition: noexceptions.h:83
mysqlpp::OptionalExceptions::disable_exceptions
void disable_exceptions() const
Disable exceptions from the object.
Definition: noexceptions.h:89
common.h
This file includes top-level definitions for use both internal to the library, and outside it...
mysqlpp::NoExceptions::NoExceptions
NoExceptions(const OptionalExceptions &a)
Constructor.
Definition: noexceptions.h:127