interface/wx/object.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        object.h
   3 // Purpose:     interface of wxObjectRefData
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows license
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 /**
  10     @class wxObjectRefData
  11
  12     This class is used to store reference-counted data.
  13
  14     Derive classes from this to store your own data. When retrieving information
  15     from a wxObject's reference data, you will need to cast to your own derived class.
  16
  17     @b Example:
  18
  19     @code
  20     // include file
  21
  22     class MyCar: public wxObject
  23     {
  24     public:
  25         MyCar() { }
  26         MyCar( int price );
  27
  28         bool IsOk() const { return m_refData != NULL; }
  29
  30         bool operator == ( const MyCar& car ) const;
  31         bool operator != (const MyCar& car) const { return !(*this == car); }
  32
  33         void SetPrice( int price );
  34         int GetPrice() const;
  35
  36     protected:
  37         virtual wxObjectRefData *CreateRefData() const;
  38         virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
  39
  40         DECLARE_DYNAMIC_CLASS(MyCar)
  41     };
  42
  43
  44     // implementation
  45
  46     class MyCarRefData: public wxObjectRefData
  47     {
  48     public:
  49         MyCarRefData()
  50         {
  51             m_price = 0;
  52         }
  53
  54         MyCarRefData( const MyCarRefData& data )
  55             : wxObjectRefData()
  56         {
  57             m_price = data.m_price;
  58         }
  59
  60         bool operator == (const MyCarRefData& data) const
  61         {
  62             return m_price == data.m_price;
  63         }
  64
  65         int m_price;
  66     };
  67
  68
  69     #define M_CARDATA ((MyCarRefData *)m_refData)
  70
  71     IMPLEMENT_DYNAMIC_CLASS(MyCar,wxObject)
  72
  73     MyCar::MyCar( int price )
  74     {
  75         m_refData = new MyCarRefData();
  76         M_CARDATA->m_price = price;
  77     }
  78
  79     wxObjectRefData *MyCar::CreateRefData() const
  80     {
  81         return new MyCarRefData;
  82     }
  83
  84     wxObjectRefData *MyCar::CloneRefData(const wxObjectRefData *data) const
  85     {
  86         return new MyCarRefData(*(MyCarRefData *)data);
  87     }
  88
  89     bool MyCar::operator == ( const MyCar& car ) const
  90     {
  91         if (m_refData == car.m_refData) return true;
  92
  93         if (!m_refData || !car.m_refData) return false;
  94
  95         return ( *(MyCarRefData*)m_refData == *(MyCarRefData*)car.m_refData );
  96     }
  97
  98     void MyCar::SetPrice( int price )
  99     {
 100         UnShare();
 101
 102         M_CARDATA->m_price = price;
 103     }
 104
 105     int MyCar::GetPrice() const
 106     {
 107         wxCHECK_MSG( IsOk(), -1, "invalid car" );
 108
 109         return (M_CARDATA->m_price);
 110     }
 111     @endcode
 112
 113
 114     @library{wxbase}
 115     @category{rtti}
 116
 117     @see wxObject, wxObjectDataPtr<T>, @ref overview_refcount
 118 */
 119 class wxObjectRefData
 120 {
 121 protected:
 122     /**
 123         Destructor.
 124
 125         It's declared @c protected so that wxObjectRefData instances
 126         will never be destroyed directly but only as result of a DecRef() call.
 127     */
 128     ~wxObjectRefData();
 129
 130 public:
 131     /**
 132         Default constructor. Initialises the internal reference count to 1.
 133     */
 134     wxObjectRefData();
 135
 136     /**
 137         Decrements the reference count associated with this shared data and, if
 138         it reaches zero, destroys this instance of wxObjectRefData releasing its
 139         memory.
 140
 141         Please note that after calling this function, the caller should
 142         absolutely avoid to use the pointer to this instance since it may not be
 143         valid anymore.
 144     */
 145     void DecRef();
 146
 147     /**
 148         Returns the reference count associated with this shared data.
 149
 150         When this goes to zero during a DecRef() call, the object will auto-free itself.
 151     */
 152     int GetRefCount() const;
 153
 154     /**
 155         Increments the reference count associated with this shared data.
 156     */
 157     void IncRef();
 158 };
 159
 160
 161
 162 /**
 163     @class wxObject
 164
 165     This is the root class of many of the wxWidgets classes.
 166
 167     It declares a virtual destructor which ensures that destructors get called
 168     for all derived class objects where necessary.
 169
 170     wxObject is the hub of a dynamic object creation scheme, enabling a program
 171     to create instances of a class only knowing its string class name, and to
 172     query the class hierarchy.
 173
 174     The class contains optional debugging versions of @b new and @b delete, which
 175     can help trace memory allocation and deallocation problems.
 176
 177     wxObject can be used to implement @ref overview_refcount "reference counted"
 178     objects, such as wxPen, wxBitmap and others
 179     (see @ref overview_refcount_list "this list").
 180
 181     @library{wxbase}
 182     @category{rtti}
 183
 184     @see wxClassInfo, @ref overview_debugging, wxObjectRefData
 185 */
 186 class wxObject
 187 {
 188 public:
 189
 190     wxObject();
 191
 192     /**
 193         Copy ctor.
 194     */
 195     wxObject(const wxObject& other);
 196
 197
 198     /**
 199         Destructor.
 200
 201         Performs dereferencing, for those objects that use reference counting.
 202     */
 203     virtual ~wxObject();
 204
 205     /**
 206         A virtual function that may be redefined by derived classes to allow dumping of
 207         memory states.
 208
 209         This function is only defined in debug build and exists only if @c __WXDEBUG__
 210         is defined.
 211
 212         @param stream
 213             Stream on which to output dump information.
 214
 215         @remarks Currently wxWidgets does not define Dump() for derived classes,
 216                  but programmers may wish to use it for their own applications.
 217                  Be sure to call the Dump member of the class's base class to allow all
 218                  information to be dumped.
 219                  The implementation of this function in wxObject just writes
 220                  the class name of the object.
 221     */
 222     void Dump(ostream& stream);
 223
 224     /**
 225         This virtual function is redefined for every class that requires run-time
 226         type information, when using the ::DECLARE_CLASS macro (or similar).
 227     */
 228     virtual wxClassInfo* GetClassInfo() const;
 229
 230     /**
 231         Returns the wxObject::m_refData pointer, i.e. the data referenced by this object.
 232
 233         @see Ref(), UnRef(), wxObject::m_refData, SetRefData(), wxObjectRefData
 234     */
 235     wxObjectRefData* GetRefData() const;
 236
 237     /**
 238         Determines whether this class is a subclass of (or the same class as)
 239         the given class.
 240
 241         Example:
 242
 243         @code
 244         bool tmp = obj->IsKindOf(CLASSINFO(wxFrame));
 245         @endcode
 246
 247         @param info
 248             A pointer to a class information object, which may be obtained
 249             by using the ::CLASSINFO macro.
 250
 251         @return @true if the class represented by info is the same class as this
 252                  one or is derived from it.
 253     */
 254     bool IsKindOf(const wxClassInfo* info) const;
 255
 256     /**
 257         Returns @true if this object has the same data pointer as @a obj.
 258
 259         Notice that @true is returned if the data pointers are @NULL in both objects.
 260
 261         This function only does a @e shallow comparison, i.e. it doesn't compare
 262         the objects pointed to by the data pointers of these objects.
 263
 264         @see @ref overview_refcount
 265     */
 266     bool IsSameAs(const wxObject& obj) const;
 267
 268     /**
 269         Makes this object refer to the data in @a clone.
 270
 271         @param clone
 272             The object to 'clone'.
 273
 274         @remarks First this function calls UnRef() on itself to decrement
 275                  (and perhaps free) the data it is currently referring to.
 276                  It then sets its own wxObject::m_refData to point to that of @a clone,
 277                  and increments the reference count inside the data.
 278
 279         @see UnRef(), SetRefData(), GetRefData(), wxObjectRefData
 280     */
 281     void Ref(const wxObject& clone);
 282
 283     /**
 284         Sets the wxObject::m_refData pointer.
 285
 286         @see Ref(), UnRef(), GetRefData(), wxObjectRefData
 287     */
 288     void SetRefData(wxObjectRefData* data);
 289
 290     /**
 291         Decrements the reference count in the associated data, and if it is zero,
 292         deletes the data.
 293
 294         The wxObject::m_refData member is set to @NULL.
 295
 296         @see Ref(), SetRefData(), GetRefData(), wxObjectRefData
 297     */
 298     void UnRef();
 299
 300     /**
 301         Ensure that this object's data is not shared with any other object.
 302
 303         If we have no data, it is created using CreateRefData() below,
 304         if we have shared data, it is copied using CloneRefData(),
 305         otherwise nothing is done.
 306     */
 307     void UnShare();
 308
 309     /**
 310         The @e delete operator is defined for debugging versions of the library only,
 311         when the identifier @c __WXDEBUG__ is defined.
 312
 313         It takes over memory deallocation, allowing wxDebugContext operations.
 314     */
 315     void operator delete(void *buf);
 316
 317     /**
 318         The @e new operator is defined for debugging versions of the library only, when
 319         the identifier @c __WXDEBUG__ is defined.
 320
 321         It takes over memory allocation, allowing wxDebugContext operations.
 322     */
 323     void* operator new(size_t size, const wxString& filename = NULL, int lineNum = 0);
 324
 325 protected:
 326
 327     /**
 328         Pointer to an object which is the object's reference-counted data.
 329
 330         @see Ref(), UnRef(), SetRefData(), GetRefData(), wxObjectRefData
 331     */
 332     wxObjectRefData*  m_refData;
 333 };
 334
 335
 336
 337 /**
 338     @class wxClassInfo
 339
 340     This class stores meta-information about classes.
 341
 342     Instances of this class are not generally defined directly by an application,
 343     but indirectly through use of macros such as ::DECLARE_DYNAMIC_CLASS and
 344     ::IMPLEMENT_DYNAMIC_CLASS.
 345
 346     @library{wxbase}
 347     @category{rtti}
 348
 349     @see @ref overview_rtti_classinfo, wxObject
 350 */
 351 class wxClassInfo
 352 {
 353 public:
 354     /**
 355         Constructs a wxClassInfo object.
 356
 357         The supplied macros implicitly construct objects of this class, so there is no
 358         need to create such objects explicitly in an application.
 359     */
 360     wxClassInfo(const wxChar* className,
 361                 const wxClassInfo* baseClass1,
 362                 const wxClassInfo* baseClass2,
 363                 int size, wxObjectConstructorFn fn);
 364
 365     /**
 366         Creates an object of the appropriate kind.
 367
 368         @return @NULL if the class has not been declared dynamically creatable
 369                  (typically, this happens for abstract classes).
 370     */
 371     wxObject* CreateObject() const;
 372
 373     /**
 374         Finds the wxClassInfo object for a class with the given @a name.
 375     */
 376     static wxClassInfo* FindClass(wxChar* name);
 377
 378     /**
 379         Returns the name of the first base class (@NULL if none).
 380     */
 381     wxChar* GetBaseClassName1() const;
 382
 383     /**
 384         Returns the name of the second base class (@NULL if none).
 385     */
 386     wxChar* GetBaseClassName2() const;
 387
 388     /**
 389         Returns the string form of the class name.
 390     */
 391     wxChar* GetClassName() const;
 392
 393     /**
 394         Returns the size of the class.
 395     */
 396     int GetSize() const;
 397
 398     /**
 399         Initializes pointers in the wxClassInfo objects for fast execution of IsKindOf().
 400         Called in base wxWidgets library initialization.
 401     */
 402     static void InitializeClasses();
 403
 404     /**
 405         Returns @true if this class info can create objects of the associated class.
 406     */
 407     bool IsDynamic() const;
 408
 409     /**
 410         Returns @true if this class is a kind of (inherits from) the given class.
 411     */
 412     bool IsKindOf(wxClassInfo* info);
 413 };
 414
 415
 416
 417 /**
 418
 419     This is helper template class primarily written to avoid memory leaks because of
 420     missing calls to wxObjectRefData::DecRef().
 421
 422     Despite the name this template can actually be used as a smart pointer for any
 423     class implementing the reference counting interface which only consists of the two
 424     methods @b T::IncRef() and @b T::DecRef().
 425
 426     The difference to wxSharedPtr<T> is that wxObjectDataPtr<T> relies on the reference
 427     counting to be in the class pointed to where instead wxSharedPtr<T> implements the
 428     reference counting itself.
 429
 430
 431     @b Example:
 432
 433     @code
 434     class MyCarRefData: public wxObjectRefData
 435     {
 436     public:
 437         MyCarRefData()  { m_price = 0; }
 438
 439         MyCarRefData( const MyCarRefData& data )
 440             : wxObjectRefData()
 441         {
 442             m_price = data.m_price;
 443         }
 444
 445         void SetPrice( int price )  { m_price = price; }
 446         int GetPrice()              { return m_price; }
 447
 448     protected:
 449         int m_price;
 450     };
 451
 452     class MyCar
 453     {
 454     public:
 455         MyCar( int price ) : m_data( new MyCarRefData )
 456         {
 457             m_data->SetPrice( price );
 458         }
 459
 460         MyCar& operator =( const MyCar& tocopy )
 461         {
 462             m_data = tocopy.m_data;
 463             return *this;
 464         }
 465
 466         bool operator == ( const MyCar& other ) const
 467         {
 468             if (m_data.get() == other.m_data.get()) return true;
 469             return (m_data->GetPrice() == other.m_data->GetPrice());
 470         }
 471
 472         void SetPrice( int price )
 473         {
 474            UnShare();
 475            m_data->SetPrice( price );
 476         }
 477
 478         int GetPrice() const
 479         {
 480            return m_data->GetPrice();
 481         }
 482
 483         wxObjectDataPtr<MyCarRefData> m_data;
 484
 485     protected:
 486         void UnShare()
 487         {
 488             if (m_data->GetRefCount() == 1)
 489                 return;
 490
 491             m_data.reset( new MyCarRefData( *m_data ) );
 492         }
 493     };
 494     @endcode
 495
 496
 497     @library{wxbase}
 498     @category{rtti,smartpointers}
 499
 500     @see wxObject, wxObjectRefData, @ref overview_refcount, wxSharedPtr<T>,
 501          wxScopedPtr<T>, wxWeakRef<T>
 502 */
 503 class wxObjectDataPtr<T>
 504 {
 505 public:
 506     /**
 507         Constructor.
 508
 509         @a ptr is a pointer to the reference counted object to which this class points.
 510         If @a ptr is not NULL @b T::IncRef() will be called on the object.
 511     */
 512     wxObjectDataPtr<T>(T* ptr = NULL);
 513
 514     /**
 515         This copy constructor increases the count of the reference counted object to
 516         which @a tocopy points and then this class will point to, as well.
 517     */
 518     wxObjectDataPtr<T>(const wxObjectDataPtr<T>& tocopy);
 519
 520
 521     /**
 522         Decreases the reference count of the object to which this class points.
 523     */
 524     ~wxObjectDataPtr<T>();
 525
 526     /**
 527         Gets a pointer to the reference counted object to which this class points.
 528     */
 529     T* get() const;
 530
 531     /**
 532         Reset this class to ptr which points to a reference counted object and
 533         calls T::DecRef() on the previously owned object.
 534     */
 535     void reset(T *ptr);
 536
 537     /**
 538         Conversion to a boolean expression (in a variant which is not
 539         convertable to anything but a boolean expression).
 540
 541         If this class contains a valid pointer it will return @true, if it contains
 542         a @NULL pointer it will return @false.
 543     */
 544     operator unspecified_bool_type() const;
 545
 546     /**
 547         Returns a reference to the object.
 548
 549         If the internal pointer is @NULL this method will cause an assert in debug mode.
 550     */
 551     T& operator*() const;
 552
 553     /**
 554         Returns a pointer to the reference counted object to which this class points.
 555
 556         If this the internal pointer is @NULL, this method will assert in debug mode.
 557     */
 558     T* operator->() const;
 559
 560     //@{
 561     /**
 562         Assignment operator.
 563     */
 564     wxObjectDataPtr<T>& operator=(const wxObjectDataPtr<T>& tocopy);
 565     wxObjectDataPtr<T>& operator=(T* ptr);
 566     //@}
 567 };
 568
 569
 570
 571 // ============================================================================
 572 // Global functions/macros
 573 // ============================================================================
 574
 575 /** @ingroup group_funcmacro_rtti */
 576 //@{
 577
 578 /**
 579     Returns a pointer to the wxClassInfo object associated with this class.
 580
 581     @header{wx/object.h}
 582 */
 583 #define CLASSINFO( className )
 584
 585 /**
 586     Used inside a class declaration to declare that the class should be made
 587     known to the class hierarchy, but objects of this class cannot be created
 588     dynamically. The same as DECLARE_ABSTRACT_CLASS().
 589
 590     @header{wx/object.h}
 591 */
 592 #define DECLARE_CLASS( className )
 593
 594 /**
 595     Used inside a class declaration to declare that the class should be
 596     made known to the class hierarchy, but objects of this class cannot be created
 597     dynamically. The same as DECLARE_CLASS().
 598
 599     @header{wx/object.h}
 600
 601     Example:
 602
 603     @code
 604     class wxCommand: public wxObject
 605     {
 606         DECLARE_ABSTRACT_CLASS(wxCommand)
 607
 608     private:
 609         ...
 610     public:
 611         ...
 612     };
 613     @endcode
 614 */
 615 #define DECLARE_ABSTRACT_CLASS( className )
 616
 617 /**
 618     Used inside a class declaration to make the class known to wxWidgets RTTI
 619     system and also declare that the objects of this class should be
 620     dynamically creatable from run-time type information. Notice that this
 621     implies that the class should have a default constructor, if this is not
 622     the case consider using DECLARE_CLASS().
 623
 624     @header{wx/object.h}
 625
 626     Example:
 627
 628     @code
 629     class wxFrame: public wxWindow
 630     {
 631     DECLARE_DYNAMIC_CLASS(wxFrame)
 632
 633     private:
 634         const wxString& frameTitle;
 635     public:
 636         ...
 637     };
 638     @endcode
 639 */
 640 #define DECLARE_DYNAMIC_CLASS( className )
 641
 642 /**
 643     Used in a C++ implementation file to complete the declaration of a class
 644     that has run-time type information. The same as IMPLEMENT_ABSTRACT_CLASS().
 645
 646     @header{wx/object.h}
 647 */
 648 #define IMPLEMENT_CLASS( className, baseClassName )
 649
 650 /**
 651     Used in a C++ implementation file to complete the declaration of a class
 652     that has run-time type information and two base classes. The same as
 653     IMPLEMENT_ABSTRACT_CLASS2().
 654
 655     @header{wx/object.h}
 656 */
 657 #define IMPLEMENT_CLASS2( className, baseClassName1, baseClassName2 )
 658
 659 /**
 660     Used in a C++ implementation file to complete the declaration of a class
 661     that has run-time type information. The same as IMPLEMENT_CLASS().
 662
 663     @header{wx/object.h}
 664
 665     Example:
 666
 667     @code
 668     IMPLEMENT_ABSTRACT_CLASS(wxCommand, wxObject)
 669
 670     wxCommand::wxCommand(void)
 671     {
 672         ...
 673     }
 674     @endcode
 675 */
 676 #define IMPLEMENT_ABSTRACT_CLASS( className, baseClassName )
 677
 678 /**
 679     Used in a C++ implementation file to complete the declaration of a class
 680     that has run-time type information and two base classes. The same as
 681     IMPLEMENT_CLASS2().
 682
 683     @header{wx/object.h}
 684 */
 685 #define IMPLEMENT_ABSTRACT_CLASS2( className, baseClassName1, baseClassName2 )
 686
 687 /**
 688     Used in a C++ implementation file to complete the declaration of a class
 689     that has run-time type information, and whose instances can be created
 690     dynamically.
 691
 692     @header{wx/object.h}
 693
 694     Example:
 695
 696     @code
 697     IMPLEMENT_DYNAMIC_CLASS(wxFrame, wxWindow)
 698
 699     wxFrame::wxFrame(void)
 700     {
 701         ...
 702     }
 703     @endcode
 704 */
 705 #define IMPLEMENT_DYNAMIC_CLASS( className, baseClassName )
 706
 707 /**
 708     Used in a C++ implementation file to complete the declaration of a class
 709     that has run-time type information, and whose instances can be created
 710     dynamically. Use this for classes derived from two base classes.
 711
 712     @header{wx/object.h}
 713 */
 714 #define IMPLEMENT_DYNAMIC_CLASS2( className, baseClassName1, baseClassName2 )
 715
 716 /**
 717     Same as @c const_cast<T>(x) if the compiler supports const cast or @c (T)x for
 718     old compilers. Unlike wxConstCast(), the cast it to the type @c T and not to
 719     <tt>T *</tt> and also the order of arguments is the same as for the standard cast.
 720
 721     @header{wx/defs.h}
 722
 723     @see wx_reinterpret_cast(), wx_static_cast()
 724 */
 725 #define wx_const_cast(T, x)
 726
 727 /**
 728     Same as @c reinterpret_cast<T>(x) if the compiler supports reinterpret cast or
 729     @c (T)x for old compilers.
 730
 731     @header{wx/defs.h}
 732
 733     @see wx_const_cast(), wx_static_cast()
 734 */
 735 #define wx_reinterpret_cast(T, x)
 736
 737 /**
 738     Same as @c static_cast<T>(x) if the compiler supports static cast or @c (T)x for
 739     old compilers. Unlike wxStaticCast(), there are no checks being done and
 740     the meaning of the macro arguments is exactly the same as for the standard
 741     static cast, i.e. @a T is the full type name and star is not appended to it.
 742
 743     @header{wx/defs.h}
 744
 745     @see wx_const_cast(), wx_reinterpret_cast(), wx_truncate_cast()
 746 */
 747 #define wx_static_cast(T, x)
 748
 749 /**
 750     This case doesn’t correspond to any standard cast but exists solely to make
 751     casts which possibly result in a truncation of an integer value more
 752     readable.
 753
 754     @header{wx/defs.h}
 755 */
 756 #define wx_truncate_cast(T, x)
 757
 758 /**
 759     This macro expands into <tt>const_cast<classname *>(ptr)</tt> if the compiler
 760     supports const_cast or into an old, C-style cast, otherwise.
 761
 762     @header{wx/defs.h}
 763
 764     @see wx_const_cast(), wxDynamicCast(), wxStaticCast()
 765 */
 766 #define wxConstCast( ptr, classname )
 767
 768 /**
 769     This macro returns the pointer @e ptr cast to the type @e classname * if
 770     the pointer is of this type (the check is done during the run-time) or
 771     @NULL otherwise. Usage of this macro is preferred over obsoleted
 772     wxObject::IsKindOf() function.
 773
 774     The @e ptr argument may be @NULL, in which case @NULL will be returned.
 775
 776     @header{wx/object.h}
 777
 778     Example:
 779
 780     @code
 781     wxWindow *win = wxWindow::FindFocus();
 782     wxTextCtrl *text = wxDynamicCast(win, wxTextCtrl);
 783     if ( text )
 784     {
 785         // a text control has the focus...
 786     }
 787     else
 788     {
 789         // no window has the focus or it is not a text control
 790     }
 791     @endcode
 792
 793     @see @ref overview_rtti, wxDynamicCastThis(), wxConstCast(), wxStaticCast()
 794 */
 795 #define wxDynamicCast( ptr, classname )
 796
 797 /**
 798     This macro is equivalent to <tt>wxDynamicCast(this, classname)</tt> but the latter provokes
 799     spurious compilation warnings from some compilers (because it tests whether
 800     @c this pointer is non-@NULL which is always true), so this macro should be
 801     used to avoid them.
 802
 803     @header{wx/object.h}
 804
 805     @see wxDynamicCast()
 806 */
 807 #define wxDynamicCastThis( classname )
 808
 809 /**
 810     This macro checks that the cast is valid in debug mode (an assert failure
 811     will result if wxDynamicCast(ptr, classname) == @NULL) and then returns the
 812     result of executing an equivalent of <tt>static_cast<classname *>(ptr)</tt>.
 813
 814     @header{wx/object.h}
 815
 816     @see wx_static_cast(), wxDynamicCast(), wxConstCast()
 817 */
 818 #define wxStaticCast( ptr, classname )
 819
 820 /**
 821     Creates and returns an object of the given class, if the class has been
 822     registered with the dynamic class system using DECLARE... and IMPLEMENT...
 823     macros.
 824
 825     @header{wx/object.h}
 826 */
 827 wxObject *wxCreateDynamicObject(const wxString& className);
 828
 829 //@}
 830
 831 /** @ingroup group_funcmacro_debug */
 832 //@{
 833
 834 /**
 835     This is defined in debug mode to be call the redefined new operator
 836     with filename and line number arguments. The definition is:
 837
 838     @code
 839     #define WXDEBUG_NEW new(__FILE__,__LINE__)
 840     @endcode
 841
 842     In non-debug mode, this is defined as the normal new operator.
 843
 844     @header{wx/object.h}
 845 */
 846 #define WXDEBUG_NEW( arg )
 847
 848 //@}
 849