-/**
-* Name: wx/debug.h
-* Purpose: Misc debug functions and macros
-* Author: Vadim Zeitlin
-* Modified by: Ryan Norton (Converted to C)
-* Created: 29/01/98
-* RCS-ID: $Id$
-* Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
-* Licence: wxWindows licence
-*/
+/////////////////////////////////////////////////////////////////////////////
+// Name: wx/debug.h
+// Purpose: Misc debug functions and macros
+// Author: Vadim Zeitlin
+// Created: 29/01/98
+// RCS-ID: $Id$
+// Copyright: (c) 1998-2009 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence: wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
-/* THIS IS A C FILE, DON'T USE C++ FEATURES (IN PARTICULAR COMMENTS) IN IT */
+#ifndef _WX_DEBUG_H_
+#define _WX_DEBUG_H_
-#ifndef _WX_DEBUG_H_
-#define _WX_DEBUG_H_
+#if !defined(__WXPALMOS5__) && !defined(__WXWINCE__)
+ #include <assert.h>
+#endif // systems without assert.h
-#ifndef __WXWINCE__
-#include <assert.h>
-#endif
-#include <limits.h> /* for CHAR_BIT used below */
+#include <limits.h> // for CHAR_BIT used below
+
+#include "wx/chartype.h" // for __TFILE__ and wxChar
+#include "wx/cpp.h" // for __WXFUNCTION__
+#include "wx/dlimpexp.h" // for WXDLLIMPEXP_FWD_BASE
-#include "wx/wxchar.h" /* for __TFILE__ and wxChar */
+class WXDLLIMPEXP_FWD_BASE wxString;
+class WXDLLIMPEXP_FWD_BASE wxCStrData;
-/* ---------------------------------------------------------------------------- */
-/* Defines controlling the debugging macros */
-/* ---------------------------------------------------------------------------- */
+// ----------------------------------------------------------------------------
+// Defines controlling the debugging macros
+// ----------------------------------------------------------------------------
-/* if _DEBUG is defined (MS VC++ and others use it in debug builds), define */
-/* __WXDEBUG__ too */
-#ifdef _DEBUG
+/*
+ wxWidgets can be built with several different levels of debug support
+ specified by the value of wxDEBUG_LEVEL constant:
+
+ 0: No assertion macros at all, this should only be used when optimizing
+ for resource-constrained systems (typically embedded ones).
+ 1: Default level, most of the assertions are enabled.
+ 2: Maximal (at least for now): asserts which are "expensive"
+ (performance-wise) or only make sense for finding errors in wxWidgets
+ itself, as opposed to bugs in applications using it, are also enabled.
+ */
+
+// unless wxDEBUG_LEVEL is predefined (by configure or via wx/setup.h under
+// Windows), use the default
+#if !defined(wxDEBUG_LEVEL)
+ #define wxDEBUG_LEVEL 1
+#endif // !defined(wxDEBUG_LEVEL)
+
+/*
+ __WXDEBUG__ is defined when wxDEBUG_LEVEL != 0. This is done mostly for
+ compatibility but it also provides a simpler way to check if asserts and
+ debug logging is enabled at all.
+ */
+#if wxDEBUG_LEVEL > 0
#ifndef __WXDEBUG__
#define __WXDEBUG__
- #endif /* !__WXDEBUG__ */
-#endif /* _DEBUG */
-
-/* if NDEBUG is defined (<assert.h> uses it), undef __WXDEBUG__ and WXDEBUG */
-#ifdef NDEBUG
+ #endif
+#else
#undef __WXDEBUG__
- #undef WXDEBUG
-#endif /* NDEBUG */
+#endif
-/* if __WXDEBUG__ is defined, make sure that WXDEBUG is defined and >= 1 */
+// Finally there is also a very old WXDEBUG macro not used anywhere at all, it
+// is only defined for compatibility.
#ifdef __WXDEBUG__
#if !defined(WXDEBUG) || !WXDEBUG
#undef WXDEBUG
#define WXDEBUG 1
- #endif /* !WXDEBUG */
-#endif /* __WXDEBUG__ */
+ #endif // !WXDEBUG
+#endif // __WXDEBUG__
-/* TODO: add more compilers supporting __FUNCTION__ */
-#if !defined(__GNUC__) && !(defined(_MSC_VER) && _MSC_VER >= 1300)
- /* no __FUNCTION__ support, still define it to avoid #ifdefs elsewhere */
- #define __FUNCTION__ (NULL)
-#endif
+// ----------------------------------------------------------------------------
+// Handling assertion failures
+// ----------------------------------------------------------------------------
+
+/*
+ Type for the function called in case of assert failure, see
+ wxSetAssertHandler().
+ */
+typedef void (*wxAssertHandler_t)(const wxString& file,
+ int line,
+ const wxString& func,
+ const wxString& cond,
+ const wxString& msg);
+
+#if wxDEBUG_LEVEL
+
+// the global assert handler function, if it is NULL asserts don't check their
+// conditions
+extern WXDLLIMPEXP_DATA_BASE(wxAssertHandler_t) wxTheAssertHandler;
+
+/*
+ Sets the function to be called in case of assertion failure.
+
+ The default assert handler forwards to wxApp::OnAssertFailure() whose
+ default behaviour is, in turn, to show the standard assertion failure
+ dialog if a wxApp object exists or shows the same dialog itself directly
+ otherwise.
+
+ While usually it is enough -- and more convenient -- to just override
+ OnAssertFailure(), to handle all assertion failures, including those
+ occurring even before wxApp object creation or after its destruction you
+ need to provide your assertion handler function.
+
+ This function also provides a simple way to disable all asserts: simply
+ pass NULL pointer to it. Doing this will result in not even evaluating
+ assert conditions at all, avoiding almost all run-time cost of asserts.
+
+ Notice that this function is not MT-safe, so you should call it before
+ starting any other threads.
+
+ The return value of this function is the previous assertion handler. It can
+ be called after any pre-processing by your handler and can also be restored
+ later if you uninstall your handler.
+ */
+inline wxAssertHandler_t wxSetAssertHandler(wxAssertHandler_t handler)
+{
+ const wxAssertHandler_t old = wxTheAssertHandler;
+ wxTheAssertHandler = handler;
+ return old;
+}
+
+/*
+ Reset the default assert handler.
+
+ This may be used to enable asserts, which are disabled by default in this
+ case, for programs built in release build (NDEBUG defined).
+ */
+extern void WXDLLIMPEXP_BASE wxSetDefaultAssertHandler();
+
+#else // !wxDEBUG_LEVEL
+
+// provide empty stubs in case assertions are completely disabled
+//
+// NB: can't use WXUNUSED() here as we're included from wx/defs.h before it is
+// defined
+inline wxAssertHandler_t wxSetAssertHandler(wxAssertHandler_t /* handler */)
+{
+ return NULL;
+}
+
+inline void wxSetDefaultAssertHandler() { }
+
+#endif // wxDEBUG_LEVEL/!wxDEBUG_LEVEL
+
+// simply a synonym for wxSetAssertHandler(NULL)
+inline void wxDisableAsserts() { wxSetAssertHandler(NULL); }
-/* ---------------------------------------------------------------------------- */
-/* Debugging macros */
-/* */
-/* All debugging macros rely on ASSERT() which in turn calls user-defined */
-/* OnAssert() function. To keep things simple, it's called even when the */
-/* expression is true (i.e. everything is ok) and by default does nothing: just */
-/* returns the same value back. But if you redefine it to do something more sexy */
-/* (popping up a message box in your favourite GUI, sending you e-mail or */
-/* whatever) it will affect all ASSERTs, FAILs and CHECKs in your code. */
-/* */
-/* Warning: if you don't like advice on programming style, don't read */
-/* further! ;-) */
-/* */
-/* Extensive use of these macros is recommended! Remember that ASSERTs are */
-/* disabled in final build (without __WXDEBUG__ defined), so they add strictly */
-/* nothing to your program's code. On the other hand, CHECK macros do stay */
-/* even in release builds, but in general are not much of a burden, while */
-/* a judicious use of them might increase your program's stability. */
-/* ---------------------------------------------------------------------------- */
-
-/* Macros which are completely disabled in 'release' mode */
-/* */
-/* NB: these functions are implemented in src/common/appcmn.cpp */
-#if defined(__cplusplus) && defined(__WXDEBUG__)
- /*
- This function is called whenever one of debugging macros fails (i.e.
- condition is false in an assertion). To customize its behaviour, override
- wxApp::OnAssert().
-
- Parameters:
- szFile and nLine - file name and line number of the ASSERT
- szFunc - function name of the ASSERT, may be NULL (NB: ASCII)
- szCond - text form of the condition which failed
- szMsg - optional message explaining the reason
- */
- extern void WXDLLIMPEXP_BASE wxOnAssert(const wxChar *szFile,
- int nLine,
- const char *szFunc,
- const wxChar *szCond,
- const wxChar *szMsg = NULL);
-
- /* call this function to break into the debugger unconditionally (assuming */
- /* the program is running under debugger, of course) */
- extern void WXDLLIMPEXP_BASE wxTrap();
-
- /* generic assert macro */
- #define wxASSERT(cond) wxASSERT_MSG(cond, NULL)
-
- /* assert with additional message explaining it's cause */
- #define wxASSERT_MSG(cond, msg) \
- if ( cond ) \
- ; \
- else \
- wxOnAssert(__TFILE__, __LINE__, __FUNCTION__, _T(#cond), msg)
-
- /* special form of assert: always triggers it (in debug mode) */
- #define wxFAIL wxFAIL_MSG(NULL)
-
- /* FAIL with some message */
- #define wxFAIL_MSG(msg) \
- wxOnAssert(__TFILE__, __LINE__, __FUNCTION__, _T("wxAssertFailure"), msg)
-
- /* an assert helper used to avoid warning when testing constant expressions, */
- /* i.e. wxASSERT( sizeof(int) == 4 ) can generate a compiler warning about */
- /* expression being always true, but not using */
- /* wxASSERT( wxAssertIsEqual(sizeof(int), 4) ) */
- /* */
- /* NB: this is made obsolete by wxCOMPILE_TIME_ASSERT() and shouldn't be */
- /* used any longer */
- extern bool WXDLLIMPEXP_BASE wxAssertIsEqual(int x, int y);
+/*
+ A macro which disables asserts for applications compiled in release build.
+
+ By default, IMPLEMENT_APP (or rather IMPLEMENT_WXWIN_MAIN) disable the
+ asserts in the applications compiled in the release build by calling this.
+ It does nothing if NDEBUG is not defined.
+ */
+#ifdef NDEBUG
+ #define wxDISABLE_ASSERTS_IN_RELEASE_BUILD() wxDisableAsserts()
#else
- #define wxTrap()
-
- /* nothing to do in release modes (hopefully at this moment there are */
- /* no more bugs ;-) */
- #define wxASSERT(cond)
- #define wxASSERT_MSG(cond, msg)
- #define wxFAIL
- #define wxFAIL_MSG(msg)
-#endif /* __WXDEBUG__ */
-
-#ifdef __cplusplus
- /* Use of wxFalse instead of false suppresses compiler warnings about testing */
- /* constant expression */
- extern WXDLLIMPEXP_DATA_BASE(const bool) wxFalse;
+ #define wxDISABLE_ASSERTS_IN_RELEASE_BUILD()
#endif
-#define wxAssertFailure wxFalse
+#if wxDEBUG_LEVEL
+
+/*
+ wxOnAssert() is used by the debugging macros defined below. Different
+ overloads are needed because these macros can be used with or without _T().
+
+ All of them are implemented in src/common/appcmn.cpp and unconditionally
+ call wxTheAssertHandler so the caller must check that it is non-NULL
+ (assert macros do it).
+ */
-/* NB: the following macros work also in release mode! */
+#if wxUSE_UNICODE
+
+// these overloads are the ones typically used by debugging macros: we have to
+// provide wxChar* msg version because it's common to use _T() in the macros
+// and finally, we can't use const wx(char)* msg = NULL, because that would
+// be ambiguous
+//
+// also notice that these functions can't be inline as wxString is not defined
+// yet (and can't be as wxString code itself may use assertions)
+extern void WXDLLIMPEXP_BASE wxOnAssert(const char *file,
+ int line,
+ const char *func,
+ const char *cond);
+
+extern void WXDLLIMPEXP_BASE wxOnAssert(const char *file,
+ int line,
+ const char *func,
+ const char *cond,
+ const char *msg);
+
+extern void WXDLLIMPEXP_BASE wxOnAssert(const char *file,
+ int line,
+ const char *func,
+ const char *cond,
+ const wxChar *msg);
+#endif /* wxUSE_UNICODE */
+
+// this version is for compatibility with wx 2.8 Unicode build only, we don't
+// use it ourselves any more except in ANSI-only build in which case it is all
+// we need
+extern void WXDLLIMPEXP_BASE wxOnAssert(const wxChar *file,
+ int line,
+ const char *func,
+ const wxChar *cond,
+ const wxChar *msg = NULL);
+
+// these overloads work when msg passed to debug macro is a string and we
+// also have to provide wxCStrData overload to resolve ambiguity which would
+// otherwise arise from wxASSERT( s.c_str() )
+extern void WXDLLIMPEXP_BASE wxOnAssert(const wxString& file,
+ int line,
+ const wxString& func,
+ const wxString& cond,
+ const wxString& msg);
+
+extern void WXDLLIMPEXP_BASE wxOnAssert(const wxString& file,
+ int line,
+ const wxString& func,
+ const wxString& cond);
+
+extern void WXDLLIMPEXP_BASE wxOnAssert(const char *file,
+ int line,
+ const char *func,
+ const char *cond,
+ const wxCStrData& msg);
+
+extern void WXDLLIMPEXP_BASE wxOnAssert(const char *file,
+ int line,
+ const char *func,
+ const char *cond,
+ const wxString& msg);
+
+#endif // wxDEBUG_LEVEL
+
+
+// ----------------------------------------------------------------------------
+// Debugging macros
+// ----------------------------------------------------------------------------
/*
- These macros must be used only in invalid situation: for example, an
- invalid parameter (NULL pointer) is passed to a function. Instead of
- dereferencing it and causing core dump the function might try using
- CHECK( p != NULL ) or CHECK( p != NULL, return LogError("p is NULL!!") )
-*/
+ Assertion macros: check if the condition is true and call assert handler
+ (which will by default notify the user about failure) if it isn't.
+
+ wxASSERT and wxFAIL macros as well as wxTrap() function do nothing at all
+ if wxDEBUG_LEVEL is 0 however they do check their conditions at default
+ debug level 1, unlike the previous wxWidgets versions.
+
+ wxASSERT_LEVEL_2 is meant to be used for "expensive" asserts which should
+ normally be disabled because they have a big impact on performance and so
+ this macro only does anything if wxDEBUG_LEVEL >= 2.
+ */
+#if wxDEBUG_LEVEL
+ // call this function to break into the debugger unconditionally (assuming
+ // the program is running under debugger, of course)
+ extern void WXDLLIMPEXP_BASE wxTrap();
+
+ // assert checks if the condition is true and calls the assert handler with
+ // the provided message if it isn't
+ //
+ // NB: the macro is defined like this to ensure that nested if/else
+ // statements containing it are compiled in the same way whether it is
+ // defined as empty or not; also notice that we can't use ";" instead
+ // of "{}" as some compilers warn about "possible unwanted ;" then
+ #define wxASSERT_MSG(cond, msg) \
+ if ( !wxTheAssertHandler || (cond) ) \
+ {} \
+ else \
+ wxOnAssert(__FILE__, __LINE__, __WXFUNCTION__, #cond, msg)
+
+ // a version without any additional message, don't use unless condition
+ // itself is fully self-explanatory
+ #define wxASSERT(cond) wxASSERT_MSG(cond, (const char*)NULL)
+
+ // wxFAIL is a special form of assert: it always triggers (and so is
+ // usually used in normally unreachable code)
+ #define wxFAIL_COND_MSG(cond, msg) \
+ if ( !wxTheAssertHandler ) \
+ {} \
+ else \
+ wxOnAssert(__FILE__, __LINE__, __WXFUNCTION__, cond, msg)
+ #define wxFAIL_MSG(msg) wxFAIL_COND_MSG("Assert failure", msg)
+ #define wxFAIL wxFAIL_MSG((const char*)NULL)
+#else // !wxDEBUG_LEVEL
+ #define wxTrap()
+
+ #define wxASSERT(cond)
+ #define wxASSERT_MSG(cond, msg)
+ #define wxFAIL
+ #define wxFAIL_MSG(msg)
+ #define wxFAIL_COND_MSG(cond, msg)
+#endif // wxDEBUG_LEVEL
+
+#if wxDEBUG_LEVEL >= 2
+ #define wxASSERT_LEVEL_2_MSG(cond, msg) wxASSERT_MSG(cond, msg)
+ #define wxASSERT_LEVEL_2(cond) wxASSERT(cond)
+#else // wxDEBUG_LEVEL < 2
+ #define wxASSERT_LEVEL_2_MSG(cond, msg)
+ #define wxASSERT_LEVEL_2(cond)
+#endif
-/* check that expression is true, "return" if not (also FAILs in debug mode) */
-#define wxCHECK(cond, rc) wxCHECK_MSG(cond, rc, NULL)
-/* as wxCHECK but with a message explaining why we fail */
+/*
+ wxCHECK macros always check their conditions, setting debug level to 0 only
+ makes them silent in case of failure, otherwise -- including at default
+ debug level 1 -- they call the assert handler if the condition is false
+
+ They are supposed to be used only in invalid situation: for example, an
+ invalid parameter (e.g. a NULL pointer) is passed to a function. Instead of
+ dereferencing it and causing core dump the function might use
+
+ wxCHECK_RET( p != NULL, "pointer can't be NULL" )
+*/
+
+// the generic macro: takes the condition to check, the statement to be execute
+// in case the condition is false and the message to pass to the assert handler
+#define wxCHECK2_MSG(cond, op, msg) \
+ if ( cond ) \
+ {} \
+ else \
+ { \
+ wxFAIL_COND_MSG(#cond, msg); \
+ op; \
+ } \
+ struct wxDummyCheckStruct /* just to force a semicolon */
+
+// check which returns with the specified return code if the condition fails
#define wxCHECK_MSG(cond, rc, msg) wxCHECK2_MSG(cond, return rc, msg)
-/* check that expression is true, perform op if not */
-#define wxCHECK2(cond, op) wxCHECK2_MSG(cond, op, NULL)
-
-/* as wxCHECK2 but with a message explaining why we fail */
-#define wxCHECK2_MSG(cond, op, msg) \
- if ( cond ) \
- ; \
- else \
- do \
- { \
- wxOnAssert(__TFILE__, __LINE__, __FUNCTION__, _T(#cond), msg); \
- op; \
- } while ( 0 )
-
-/* special form of wxCHECK2: as wxCHECK, but for use in void functions */
-/* */
-/* NB: there is only one form (with msg parameter) and it's intentional: */
-/* there is no other way to tell the caller what exactly went wrong */
-/* from the void function (of course, the function shouldn't be void */
-/* to begin with...) */
+// check that expression is true, "return" if not (also FAILs in debug mode)
+#define wxCHECK(cond, rc) wxCHECK_MSG(cond, rc, (const char*)NULL)
+
+// check that expression is true, perform op if not
+#define wxCHECK2(cond, op) wxCHECK2_MSG(cond, op, (const char*)NULL)
+
+// special form of wxCHECK2: as wxCHECK, but for use in void functions
+//
+// NB: there is only one form (with msg parameter) and it's intentional:
+// there is no other way to tell the caller what exactly went wrong
+// from the void function (of course, the function shouldn't be void
+// to begin with...)
#define wxCHECK_RET(cond, msg) wxCHECK2_MSG(cond, return, msg)
-/* ---------------------------------------------------------------------------- */
-/* Compile time asserts */
-/* */
-/* Unlike the normal assert and related macros above which are checked during */
-/* the program tun-time the macros below will result in a compilation error if */
-/* the condition they check is false. This is usually used to check the */
-/* expressions containing sizeof()s which cannot be tested with the */
-/* preprocessor. If you can use the #if's, do use them as you can give a more */
-/* detailed error message then. */
-/* ---------------------------------------------------------------------------- */
+
+// ----------------------------------------------------------------------------
+// Compile time asserts
+//
+// Unlike the normal assert and related macros above which are checked during
+// the program run-time the macros below will result in a compilation error if
+// the condition they check is false. This is usually used to check the
+// expressions containing sizeof()s which cannot be tested with the
+// preprocessor. If you can use the #if's, do use them as you can give a more
+// detailed error message then.
+// ----------------------------------------------------------------------------
/*
How this works (you don't have to understand it to be able to use the
It may be used both within a function and in the global scope.
*/
-#if defined(__WATCOMC__) && defined(__cplusplus)
+#if defined(__WATCOMC__)
/* avoid "unused symbol" warning */
#define wxCOMPILE_TIME_ASSERT(expr, msg) \
class wxMAKE_UNIQUE_ASSERT_NAME { \
unsigned int msg: expr; \
wxMAKE_UNIQUE_ASSERT_NAME() { wxUnusedVar(msg); } \
}
+#elif defined( __VMS )
+namespace wxdebug{
+
+// HP aCC cannot deal with missing names for template value parameters
+template <bool x> struct STATIC_ASSERTION_FAILURE;
+
+template <> struct STATIC_ASSERTION_FAILURE<true> { enum { value = 1 }; };
+
+// HP aCC cannot deal with missing names for template value parameters
+template<int x> struct static_assert_test{};
+
+}
+ #define WX_JOIN( X, Y ) X##Y
+ #define WX_STATIC_ASSERT_BOOL_CAST(x) (bool)(x)
+ #define wxCOMPILE_TIME_ASSERT(expr, msg) \
+ typedef ::wxdebug::static_assert_test<\
+ sizeof(::wxdebug::STATIC_ASSERTION_FAILURE< WX_STATIC_ASSERT_BOOL_CAST( expr ) >)>\
+ WX_JOIN(wx_static_assert_typedef_, __LINE__)
#else
#define wxCOMPILE_TIME_ASSERT(expr, msg) \
struct wxMAKE_UNIQUE_ASSERT_NAME { unsigned int msg: expr; }
#define wxCOMPILE_TIME_ASSERT2(expr, msg, text) \
struct wxMAKE_UNIQUE_ASSERT_NAME2(text) { unsigned int msg: expr; }
-/* helpers for wxCOMPILE_TIME_ASSERT below, for private use only */
+// helpers for wxCOMPILE_TIME_ASSERT below, for private use only
#define wxMAKE_BITSIZE_MSG(type, size) type ## SmallerThan ## size ## Bits
-/* a special case of compile time assert: check that the size of the given type */
-/* is at least the given number of bits */
+// a special case of compile time assert: check that the size of the given type
+// is at least the given number of bits
#define wxASSERT_MIN_BITSIZE(type, size) \
wxCOMPILE_TIME_ASSERT(sizeof(type) * CHAR_BIT >= size, \
wxMAKE_BITSIZE_MSG(type, size))
-/* ---------------------------------------------------------------------------- */
-/* other miscellaneous debugger-related functions */
-/* ---------------------------------------------------------------------------- */
+
+// ----------------------------------------------------------------------------
+// other miscellaneous debugger-related functions
+// ----------------------------------------------------------------------------
/*
Return true if we're running under debugger.
Currently this only really works under Win32 and Mac in CodeWarrior builds,
it always returns false in other cases.
*/
-#ifdef __cplusplus
- /* ABX: check __WIN32__ instead of __WXMSW__ for the same MSWBase in any Win32 port */
- #if defined(__WXMAC__) || defined(__WIN32__)
- extern bool WXDLLIMPEXP_BASE wxIsDebuggerRunning();
- #else /* !Mac */
- inline bool wxIsDebuggerRunning() { return false; }
- #endif /* Mac/!Mac */
-#endif /* __cplusplus */
-
-#endif /* _WX_DEBUG_H_ */
+#if defined(__WXMAC__) || defined(__WIN32__)
+ extern bool WXDLLIMPEXP_BASE wxIsDebuggerRunning();
+#else // !Mac
+ inline bool wxIsDebuggerRunning() { return false; }
+#endif // Mac/!Mac
+
+// An assert helper used to avoid warning when testing constant expressions,
+// i.e. wxASSERT( sizeof(int) == 4 ) can generate a compiler warning about
+// expression being always true, but not using
+// wxASSERT( wxAssertIsEqual(sizeof(int), 4) )
+//
+// NB: this is made obsolete by wxCOMPILE_TIME_ASSERT() and should no
+// longer be used.
+extern bool WXDLLIMPEXP_BASE wxAssertIsEqual(int x, int y);
+
+// Use of wxFalse instead of false suppresses compiler warnings about testing
+// constant expression
+extern WXDLLIMPEXP_DATA_BASE(const bool) wxFalse;
+
+#define wxAssertFailure wxFalse
+
+// This is similar to WXUNUSED() and useful for parameters which are only used
+// in assertions.
+#if wxDEBUG_LEVEL
+ #define WXUNUSED_UNLESS_DEBUG(param) param
+#else
+ #define WXUNUSED_UNLESS_DEBUG(param) WXUNUSED(param)
+#endif
+
+
+#endif // _WX_DEBUG_H_
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