wxWidgets/interface/debug.h

/////////////////////////////////////////////////////////////////////////////
    // Name:        debug.h
    // Purpose:     documentation for global functions
    // Author:      wxWidgets team
    // RCS-ID:      $Id$
    // Licence:     wxWindows license
    /////////////////////////////////////////////////////////////////////////////
    
    /**
    Will always generate an assert error if this code is reached (in debug mode).
    
    See also: wxFAIL_MSG
*/
#define wxFAIL()     /* implementation is private */


    /**
    This function is called whenever one of debugging macros fails (i.e. condition
    is @false in an assertion). It is only defined in the debug mode, in release
    builds the wxCHECK failures don't result in anything.
    
    To override the default behaviour in the debug builds which is to show the user
    a dialog asking whether he wants to abort the program, continue or continue
    ignoring any subsequent assert failures, you may override
    wxApp::OnAssertFailure which is called by this function if
    the global application object exists.
*/
void wxOnAssert(const char * fileName, int lineNumber,
                const char * func,
                const char * cond,
                const char * msg = @NULL);

/**
    In debug mode (when @c __WXDEBUG__ is defined) this function generates a
    debugger exception meaning that the control is passed to the debugger if one is
    attached to the process. Otherwise the program just terminates abnormally.
    
    In release mode this function does nothing.
*/
void wxTrap();

/**
    Will always generate an assert error with specified message if this code is
    reached (in debug mode).
    
    This macro is useful for marking unreachable" code areas, for example
    it may be used in the "default:" branch of a switch statement if all possible
    cases are processed above.
    
    @sa wxFAIL
*/
#define wxFAIL_MSG(msg)     /* implementation is private */

/**
    Checks that the condition is @true, returns with the given return value if not
    (FAILs in debug mode).
    This check is done even in release mode.
*/
#define wxCHECK(condition,  retValue)     /* implementation is private */

/**
    This macro results in a
    @ref overview_wxcompiletimeassert "compile time assertion failure" if the size
    of the given type @e type is less than @e size bits.
    
    You may use it like this, for example:
    @code
    // we rely on the int being able to hold values up to 2^32
        wxASSERT_MIN_BITSIZE(int, 32);
    
        // can't work with the platforms using UTF-8 for wchar_t
        wxASSERT_MIN_BITSIZE(wchar_t, 16);
    @endcode
*/
#define wxASSERT_MIN_BITSIZE(type,  size)     /* implementation is private */

/**
    Assert macro with message. An error message will be generated if the condition
    is @false.
    
    @sa wxASSERT, wxCOMPILE_TIME_ASSERT
*/
#define wxASSERT_MSG(condition,  msg)     /* implementation is private */

/**
    This is the same as wxCHECK2, but
    wxFAIL_MSG with the specified @e msg is called
    instead of wxFAIL() if the @e condition is @false.
*/
#define wxCHECK2(condition,  operation,  msg)     /* implementation is private */

/**
    Assert macro. An error message will be generated if the condition is @false in
    debug mode, but nothing will be done in the release build.
    
    Please note that the condition in wxASSERT() should have no side effects
    because it will not be executed in release mode at all.
    
    @sa wxASSERT_MSG, wxCOMPILE_TIME_ASSERT
*/
#define wxASSERT(condition)     /* implementation is private */

/**
    Checks that the condition is @true, and returns if not (FAILs with given error
    message in debug mode). This check is done even in release mode.
    
    This macro should be used in void functions instead of
    wxCHECK_MSG.
*/
#define wxCHECK_RET(condition,  msg)     /* implementation is private */

/**
    Checks that the condition is @true and wxFAIL and execute
    @e operation if it is not. This is a generalisation of
    wxCHECK and may be used when something else than just
    returning from the function must be done when the @e condition is @false.
    
    This check is done even in release mode.
*/
#define wxCHECK2(condition,  operation)     /* implementation is private */

/**
    This macro is identical to wxCOMPILE_TIME_ASSERT2
    except that it allows you to specify a unique @e name for the struct
    internally defined by this macro to avoid getting the compilation errors
    described above.
*/
#define wxCOMPILE_TIME_ASSERT(condition,  msg,  name)     /* implementation is private */

/**
    Checks that the condition is @true, returns with the given return value if not
    (FAILs in debug mode).
    This check is done even in release mode.
    
    This macro may be only used in non-void functions, see also
    wxCHECK_RET.
*/
#define wxCHECK_MSG(condition,  retValue,  msg)     /* implementation is private */

/**
    Using @c wxCOMPILE_TIME_ASSERT results in a compilation error if the
    specified @e condition is @false. The compiler error message should include
    the @e msg identifier - please note that it must be a valid C++ identifier
    and not a string unlike in the other cases.
    
    This macro is mostly useful for testing the expressions involving the
    @c sizeof operator as they can't be tested by the preprocessor but it is
    sometimes desirable to test them at the compile time.
    
    Note that this macro internally declares a struct whose name it tries to make
    unique by using the @c __LINE__ in it but it may still not work if you
    use it on the same line in two different source files. In this case you may
    either change the line in which either of them appears on or use the
    wxCOMPILE_TIME_ASSERT2 macro.
    
    Also note that Microsoft Visual C++ has a bug which results in compiler errors
    if you use this macro with 'Program Database For Edit And Continue'
    (@c /ZI) option, so you shouldn't use it ('Program Database'
    (@c /Zi) is ok though) for the code making use of this macro.
    
    @sa wxASSERT_MSG, wxASSERT_MIN_BITSIZE
*/
#define wxCOMPILE_TIME_ASSERT(condition,  msg)     /* implementation is private */