A Discrete-Event Network Simulator
API
log-macros-disabled.h
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2014 Andrey Mazo
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation;
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program; if not, write to the Free Software
15  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16  *
17  * Author: Andrey Mazo <ahippo@yandex.com>
18  */
19 
26 #ifndef NS3_LOG_MACROS_DISABLED_H
27 #define NS3_LOG_MACROS_DISABLED_H
28 
29 #ifndef NS3_LOG_ENABLE
30 /*
31  Implementation Note:
32 
33  std::clog << msg
34  This expression is required for forms like NS_LOG_LOGIC (... << std::endl ...)
35 
36 
37  ns3::ParameterLogger (std::clog) << msg
38  This expression is required for NS_LOG_FUNCTION (... << vector ...)
39 
40  IMO ParameterLogger should work for both cases, but it fails
41  with the error:
42 
43  note: in expansion of macro NS_LOG_LOGIC (std::endl...
44  error: no match for operator<< (operand types are ns3::ParameterLogger
45  and <unresolved overloaded function type>)
46 
47  note: candidate: template<class T> ns3::ParameterLogger&
48  ns3::ParameterLogger::operator<<(T)
49  note: template argument deduction/substitution failed
50  note: couldn't deduce template parameter T
51 
52  Note that std::endl is templated manipulator function, which needs the
53  target stream to resolve it's own template parameters. The compiler
54  should deduce this from the ParameterLogger::operator<< <T> ()
55  implementation, but evidently fails to do so.
56 
57 */
58 
63 #define NS_LOG_NOOP_INTERNAL(msg) \
64  do \
65  if (false) \
66  { \
67  std::clog << msg; \
68  } \
69  while (false)
70 
71 #define NS_LOG(level, msg) NS_LOG_NOOP_INTERNAL(msg)
72 
73 #define NS_LOG_FUNCTION_NOARGS()
74 
79 #define NS_LOG_NOOP_FUNC_INTERNAL(msg) \
80  do \
81  if (false) \
82  { \
83  ns3::ParameterLogger(std::clog) << msg; \
84  } \
85  while (false)
86 
87 #define NS_LOG_FUNCTION(parameters) NS_LOG_NOOP_FUNC_INTERNAL(parameters)
88 
89 #define NS_LOG_UNCOND(msg) NS_LOG_NOOP_INTERNAL(msg)
90 
91 #endif /* !NS3_LOG_ENABLE */
92 
93 #endif /* NS3_LOG_MACROS_DISABLED_H */