lemon-1.3: lemon/assert.h@4d79daa40e9b

     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 #  define LEMON_FUNCTION_NAME (__PRETTY_FUNCTION__)

   107 #endif

   109 #ifdef DOXYGEN

   111 /// \ingroup exceptions

   112 ///

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

   114 ///

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

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

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

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

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

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

   121 ///

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

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

   124 /// \code

   125 /// #define LEMON_DISABLE_ASSERTS

   126 /// \endcode

   127 /// or with compilation parameters:

   128 /// \code

   129 /// g++ -DLEMON_DISABLE_ASSERTS

   130 /// make CXXFLAGS='-DLEMON_DISABLE_ASSERTS'

   131 /// \endcode

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

   133 ///

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

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

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

   137 ///

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

   139 ///

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

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

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

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

   144 ///   behaviour.

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

   146 ///   function.

   147 ///   \code

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

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

   150 ///   \endcode

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

   152 ///   LEMON_CUSTOM_ASSERT_HANDLER macro name.

   153 ///   \code

   154 ///     #define LEMON_CUSTOM_ASSERT_HANDLER custom_assert_handler

   155 ///   \endcode

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

   157 ///   handler is called with appropiate parameters.

   158 ///

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

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

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

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

   163 #  define LEMON_ASSERT(exp, msg)					\

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

   165     LEMON_ASSERT_HANDLER(__FILE__, __LINE__,				\

   166 			 LEMON_FUNCTION_NAME,				\

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

   169 /// \ingroup exceptions

   170 ///

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

   172 ///

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

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

   175 /// \code

   176 ///   LEMON_ASSERT(false, msg);

   177 /// \endcode

   178 ///

   179 /// \see LEMON_ASSERT

   180 #  define LEMON_FIXME(msg)						\

   181   (LEMON_ASSERT_HANDLER(__FILE__, __LINE__, LEMON_FUNCTION_NAME,	\

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

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

   185 /// \ingroup exceptions

   186 ///

   187 /// \brief Macro for internal assertions

   188 ///

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

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

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

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

   193 /// LEMON_ENABLE_DEBUG.

   194 /// \code

   195 /// #define LEMON_ENABLE_DEBUG

   196 /// \endcode

   197 /// or with compilation parameters:

   198 /// \code

   199 /// g++ -DLEMON_ENABLE_DEBUG

   200 /// make CXXFLAGS='-DLEMON_ENABLE_DEBUG'

   201 /// \endcode

   202 ///

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

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

   205 /// macro.

   206 ///

   207 /// \see LEMON_ASSERT

   208 #  define LEMON_DEBUG(exp, msg)						\

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

   210     LEMON_ASSERT_HANDLER(__FILE__, __LINE__,                            \

   211 			 LEMON_FUNCTION_NAME,				\

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

   214 #else

   216 #  ifndef LEMON_ASSERT_HANDLER

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

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

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

   220 #  else

   221 #    define LEMON_ASSERT(exp, msg)					\

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

   223         LEMON_ASSERT_HANDLER(__FILE__, __LINE__,                        \

   224 			     LEMON_FUNCTION_NAME,			\

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

   226 			     #exp), 0)))

   227 #    define LEMON_FIXME(msg)						\

   228        (LEMON_ASSERT_HANDLER(__FILE__, __LINE__, LEMON_FUNCTION_NAME,	\

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

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

   232 #    if LEMON_ENABLE_DEBUG

   233 #      define LEMON_DEBUG(exp, msg)

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

   235            LEMON_ASSERT_HANDLER(__FILE__, __LINE__,  \

   236                                 LEMON_FUNCTION_NAME, \

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

   238 				#exp), 0)))

   239 #    else

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

   241 #    endif

   242 #  endif

   244 #endif

   246 #ifdef DOXYGEN

   249 #else

   252 #endif

author	Alpar Juttner <alpar@cs.elte.hu>
	Thu, 24 Apr 2008 20:26:14 +0100
changeset 151	4d79daa40e9b
parent 112	d2ee5e7f00ef
child 142	8b703d177341
permissions	-rw-r--r--