lemon-1.2: lemon/assert.h@b026e9779b28

     1 /* -*- C++ -*-

     2  *

     3  * This file is a part of LEMON, a generic C++ optimization library

     4  *

     5  * Copyright (C) 2003-2008

     6  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

     7  * (Egervary Research Group on Combinatorial Optimization, EGRES).

     8  *

     9  * Permission to use, modify and distribute this software is granted

    10  * provided that this copyright notice appears in all copies. For

    11  * precise terms see the accompanying LICENSE file.

    12  *

    13  * This software is provided "AS IS" with no warranty of any kind,

    14  * express or implied, and with no claim as to its suitability for any

    15  * purpose.

    16  *

    17  */

    19 #ifndef LEMON_ASSERT_H

    20 #define LEMON_ASSERT_H

    22 /// \ingroup exceptions

    23 /// \file

    24 /// \brief Extended assertion handling

    26 #include <lemon/error.h>

    28 namespace lemon {

    30   inline void assert_fail_log(const char *file, int line, const char *function,

    31 			      const char *message, const char *assertion)

    32   {

    33     std::cerr << file << ":" << line << ": ";

    34     if (function)

    35       std::cerr << function << ": ";

    36     std::cerr << message;

    37     if (assertion)

    38       std::cerr << " (assertion '" << assertion << "' failed)";

    39     std::cerr << std::endl;

    40   }

    42   inline void assert_fail_abort(const char *file, int line,

    43 				const char *function, const char* message,

    44 				const char *assertion)

    45   {

    46     assert_fail_log(file, line, function, message, assertion);

    47     std::abort();

    48   }

    50   namespace _assert_bits {

    53     inline const char* cstringify(const std::string& str) {

    54       return str.c_str();

    55     }

    57     inline const char* cstringify(const char* str) {

    58       return str;

    59     }

    60   }

    61 }

    63 #endif // LEMON_ASSERT_H

    65 #undef LEMON_ASSERT

    66 #undef LEMON_FIXME

    67 #undef LEMON_DEBUG

    69 #if (defined(LEMON_ASSERT_LOG) ? 1 : 0) +		\

    70   (defined(LEMON_ASSERT_ABORT) ? 1 : 0) +		\

    71   (defined(LEMON_ASSERT_CUSTOM) ? 1 : 0) > 1

    72 #error "LEMON assertion system is not set properly"

    73 #endif

    75 #if ((defined(LEMON_ASSERT_LOG) ? 1 : 0) +		\

    76      (defined(LEMON_ASSERT_ABORT) ? 1 : 0) +		\

    77      (defined(LEMON_ASSERT_CUSTOM) ? 1 : 0) == 1 ||	\

    78      defined(LEMON_ENABLE_ASSERTS)) &&			\

    79   (defined(LEMON_DISABLE_ASSERTS) ||			\

    80    defined(NDEBUG))

    81 #error "LEMON assertion system is not set properly"

    82 #endif

    85 #if defined LEMON_ASSERT_LOG

    86 #  undef LEMON_ASSERT_HANDLER

    87 #  define LEMON_ASSERT_HANDLER ::lemon::assert_fail_log

    88 #elif defined LEMON_ASSERT_ABORT

    89 #  undef LEMON_ASSERT_HANDLER

    90 #  define LEMON_ASSERT_HANDLER ::lemon::assert_fail_abort

    91 #elif defined LEMON_ASSERT_CUSTOM

    92 #  undef LEMON_ASSERT_HANDLER

    93 #  ifndef LEMON_CUSTOM_ASSERT_HANDLER

    94 #    error "LEMON_CUSTOM_ASSERT_HANDLER is not set"

    95 #  endif

    96 #  define LEMON_ASSERT_HANDLER LEMON_CUSTOM_ASSERT_HANDLER

    97 #elif defined LEMON_DISABLE_ASSERTS

    98 #  undef LEMON_ASSERT_HANDLER

    99 #elif defined NDEBUG

   100 #  undef LEMON_ASSERT_HANDLER

   101 #else

   102 #  define LEMON_ASSERT_HANDLER ::lemon::assert_fail_abort

   103 #endif

   105 #ifndef LEMON_FUNCTION_NAME

   106 #  if defined __GNUC__

   107 #    define LEMON_FUNCTION_NAME (__PRETTY_FUNCTION__)

   108 #  elif defined _MSC_VER

   109 #    define LEMON_FUNCTION_NAME (__FUNCSIG__)

   110 #  else

   111 #    define LEMON_FUNCTION_NAME (__func__)

   112 #  endif

   113 #endif

   115 #ifdef DOXYGEN

   117 /// \ingroup exceptions

   118 ///

   119 /// \brief Macro for assertion with customizable message

   120 ///

   121 /// Macro for assertion with customizable message.  \param exp An

   122 /// expression that must be convertible to \c bool.  If it is \c

   123 /// false, then an assertion is raised. The concrete behaviour depends

   124 /// on the settings of the assertion system.  \param msg A <tt>const

   125 /// char*</tt> parameter, which can be used to provide information

   126 /// about the circumstances of the failed assertion.

   127 ///

   128 /// The assertions are enabled in the default behaviour.

   129 /// You can disable them with the following code:

   130 /// \code

   131 /// #define LEMON_DISABLE_ASSERTS

   132 /// \endcode

   133 /// or with compilation parameters:

   134 /// \code

   135 /// g++ -DLEMON_DISABLE_ASSERTS

   136 /// make CXXFLAGS='-DLEMON_DISABLE_ASSERTS'

   137 /// \endcode

   138 /// The checking is also disabled when the standard macro \c NDEBUG is defined.

   139 ///

   140 /// The LEMON assertion system has a wide range of customization

   141 /// properties. As a default behaviour the failed assertion prints a

   142 /// short log message to the standard error and aborts the execution.

   143 ///

   144 /// The following modes can be used in the assertion system:

   145 ///

   146 /// - \c LEMON_ASSERT_LOG The failed assertion prints a short log

   147 ///   message to the standard error and continues the execution.

   148 /// - \c LEMON_ASSERT_ABORT This mode is similar to the \c

   149 ///   LEMON_ASSERT_LOG, but it aborts the program. It is the default

   150 ///   behaviour.

   151 /// - \c LEMON_ASSERT_CUSTOM The user can define own assertion handler

   152 ///   function.

   153 ///   \code

   154 ///     void custom_assert_handler(const char* file, int line, const char* function,

   155 ///                                const char* message, const char* assertion);

   156 ///   \endcode

   157 ///   The name of the function should be defined as the \c

   158 ///   LEMON_CUSTOM_ASSERT_HANDLER macro name.

   159 ///   \code

   160 ///     #define LEMON_CUSTOM_ASSERT_HANDLER custom_assert_handler

   161 ///   \endcode

   162 ///   Whenever an assertion is occured, the custom assertion

   163 ///   handler is called with appropiate parameters.

   164 ///

   165 /// The assertion mode can also be changed within one compilation unit.

   166 /// If the macros are redefined with other settings and the

   167 /// \ref lemon/assert.h "assert.h" file is reincluded, then the

   168 /// behaviour is changed appropiately to the new settings.

   169 #  define LEMON_ASSERT(exp, msg)					\

   170   (static_cast<void> (!!(exp) ? 0 : (					\

   171     LEMON_ASSERT_HANDLER(__FILE__, __LINE__,				\

   172 			 LEMON_FUNCTION_NAME,				\

   173 			 ::lemon::_assert_bits::cstringify(msg), #exp), 0)))

   175 /// \ingroup exceptions

   176 ///

   177 /// \brief Macro for mark not yet implemented features.

   178 ///

   179 /// Macro for mark not yet implemented features and outstanding bugs.

   180 /// It is close to be the shortcut of the following code:

   181 /// \code

   182 ///   LEMON_ASSERT(false, msg);

   183 /// \endcode

   184 ///

   185 /// \see LEMON_ASSERT

   186 #  define LEMON_FIXME(msg)						\

   187   (LEMON_ASSERT_HANDLER(__FILE__, __LINE__, LEMON_FUNCTION_NAME,	\

   188 			::lemon::_assert_bits::cstringify(msg),		\

   189 			static_cast<const char*>(0)))

   191 /// \ingroup exceptions

   192 ///

   193 /// \brief Macro for internal assertions

   194 ///

   195 /// Macro for internal assertions, it is used in the library to check

   196 /// the consistency of results of algorithms, several pre- and

   197 /// postconditions and invariants. The checking is disabled by

   198 /// default, but it can be turned on with the macro \c

   199 /// LEMON_ENABLE_DEBUG.

   200 /// \code

   201 /// #define LEMON_ENABLE_DEBUG

   202 /// \endcode

   203 /// or with compilation parameters:

   204 /// \code

   205 /// g++ -DLEMON_ENABLE_DEBUG

   206 /// make CXXFLAGS='-DLEMON_ENABLE_DEBUG'

   207 /// \endcode

   208 ///

   209 /// This macro works like the \c LEMON_ASSERT macro, therefore the

   210 /// current behaviour depends on the settings of \c LEMON_ASSERT

   211 /// macro.

   212 ///

   213 /// \see LEMON_ASSERT

   214 #  define LEMON_DEBUG(exp, msg)						\

   215   (static_cast<void> (!!(exp) ? 0 : (					\

   216     LEMON_ASSERT_HANDLER(__FILE__, __LINE__,                            \

   217 			 LEMON_FUNCTION_NAME,				\

   218 			 ::lemon::_assert_bits::cstringify(msg), #exp), 0)))

   220 #else

   222 #  ifndef LEMON_ASSERT_HANDLER

   223 #    define LEMON_ASSERT(exp, msg)  (static_cast<void>(0))

   224 #    define LEMON_FIXME(msg) (static_cast<void>(0))

   225 #    define LEMON_DEBUG(exp, msg) (static_cast<void>(0))

   226 #  else

   227 #    define LEMON_ASSERT(exp, msg)					\

   228        (static_cast<void> (!!(exp) ? 0 : (				\

   229         LEMON_ASSERT_HANDLER(__FILE__, __LINE__,                        \

   230 			     LEMON_FUNCTION_NAME,			\

   231 			     ::lemon::_assert_bits::cstringify(msg),	\

   232 			     #exp), 0)))

   233 #    define LEMON_FIXME(msg)						\

   234        (LEMON_ASSERT_HANDLER(__FILE__, __LINE__, LEMON_FUNCTION_NAME,	\

   235 			     ::lemon::_assert_bits::cstringify(msg),	\

   236 			     static_cast<const char*>(0)))

   238 #    if LEMON_ENABLE_DEBUG

   239 #      define LEMON_DEBUG(exp, msg)

   240          (static_cast<void> (!!(exp) ? 0 : (         \

   241            LEMON_ASSERT_HANDLER(__FILE__, __LINE__,  \

   242                                 LEMON_FUNCTION_NAME, \

   243 				::lemon::_assert_bits::cstringify(msg),	\

   244 				#exp), 0)))

   245 #    else

   246 #      define LEMON_DEBUG(exp, msg) (static_cast<void>(0))

   247 #    endif

   248 #  endif

   250 #endif

   252 #ifdef DOXYGEN

   255 #else

   258 #endif

author	Balazs Dezso <deba@inf.elte.hu>
	Mon, 16 Jun 2008 18:23:11 +0200
changeset 173	b026e9779b28
parent 118	407c08a0eae9
child 209	765619b7cbb2
permissions	-rw-r--r--