TClass

class TClass : public TDictionary

    private:

      TMethod* GetClassMethod(Long_t faddr)
      TMethod* GetClassMethod(const char* name, const char* signature)
          void Init(const char* name, Version_t cversion, const type_info* info, IsAFunc_t isa, ShowMembersFunc_t showmember, const char* dfil, const char* ifil, Int_t dl, Int_t il)
          void SetClassVersion(Version_t version)

    public:

                              TClass()
                              TClass(const char* name)
                              TClass(const char* name, Version_t cversion, const char* dfil = "0", const char* ifil = "0", Int_t dl = 0, Int_t il = 0)
                              TClass(const char* name, Version_t cversion, const type_info& info, IsAFunc_t isa, ShowMembersFunc_t showmember, const char* dfil, const char* ifil, Int_t dl, Int_t il)
                              TClass(const TClass&)
                      virtual ~TClass()
                         void AddImplFile(const char* filename, int line)
                         void AddInstance(Bool_t heap = kFALSE)
                 static Int_t AutoBrowse(TObject* obj, TBrowser* browser)
                 virtual void Browse(TBrowser* b)
                         void BuildRealData(void* pointer = 0)
                         void BuildRealDataFake(const char* name, Int_t offset, TClass* cl)
                       Bool_t CanIgnoreTObjectStreamer()
               static TClass* Class()
                         void Destructor(void* obj, Bool_t dtorOnly = kFALSE)
                 virtual void Draw(const Option_t* option)
                        void* DynamicCast(const TClass* base, void* obj, Bool_t up = kTRUE)
                        char* EscapeChars(char* text) const
                      TClass* GetActualClass(const void* object) const
                      TClass* GetBaseClass(const char* classname)
                      TClass* GetBaseClass(const TClass* base)
                        Int_t GetBaseClassOffset(const TClass* base)
                      TClass* GetBaseDataMember(const char* datamember)
                       UInt_t GetCheckSum(UInt_t code = 0) const
                G__ClassInfo* GetClassInfo() const
                    Version_t GetClassVersion() const
                 TDataMember* GetDataMember(const char* datamember) const
                        Int_t GetDataMemberOffset(const char* membername) const
                      Short_t GetDeclFileLine() const
                  const char* GetDeclFileName() const
              ROOT::DelFunc_t GetDelete() const
           ROOT::DelArrFunc_t GetDeleteArray() const
              ROOT::DesFunc_t GetDestructor() const
                       UInt_t GetHeapInstanceCount() const
                      Short_t GetImplFileLine() const
                  const char* GetImplFileName() const
                       UInt_t GetInstanceCount() const
                       TList* GetListOfAllPublicDataMembers()
                       TList* GetListOfAllPublicMethods()
                       TList* GetListOfBases()
                       TList* GetListOfDataMembers()
                       TList* GetListOfMethods()
                       TList* GetListOfRealData() const
                         void GetMenuItems(TList* listitems)
                       TList* GetMenuList() const
                     TMethod* GetMethod(const char* method, const char* params)
                     TMethod* GetMethodAllAny(const char* method)
                     TMethod* GetMethodAny(const char* method)
                     TMethod* GetMethodWithPrototype(const char* method, const char* proto)
                        Int_t GetNdata()
              ROOT::NewFunc_t GetNew() const
           ROOT::NewArrFunc_t GetNewArray() const
                        Int_t GetNmethods()
                   TRealData* GetRealData(const char* name) const
            ShowMembersFunc_t GetShowMembersWrapper()
               TStreamerInfo* GetStreamerInfo(Int_t version = 0)
                   TObjArray* GetStreamerInfos() const
             const type_info* GetTypeInfo() const
                         void IgnoreTObjectStreamer(Bool_t ignore = kTRUE)
               virtual Bool_t InheritsFrom(const char* cl) const
               virtual Bool_t InheritsFrom(const TClass* cl) const
              virtual TClass* IsA() const
      static TClass::ENewType IsCallingNew()
               virtual Bool_t IsFolder() const
                       Bool_t IsForeign() const
                       Bool_t IsLoaded() const
                       Bool_t IsTObject() const
               static TClass* Load(TBuffer& b)
                         void MakeCustomMenuList()
                        void* New(TClass::ENewType defConstructor = kClassNew)
                        void* New(void* arena, TClass::ENewType defConstructor = kClassNew)
               virtual Long_t Property() const
                        Int_t ReadBuffer(TBuffer& b, void* pointer, Int_t version, UInt_t start, UInt_t count)
                        Int_t ReadBuffer(TBuffer& b, void* pointer)
                         void ResetInstanceCount()
                         void ResetMenuList()
                         void SetDelete(ROOT::DelFunc_t deleteFunc)
                         void SetDeleteArray(ROOT::DelArrFunc_t deleteArrayFunc)
                         void SetDestructor(ROOT::DesFunc_t destructorFunc)
                         void SetNew(ROOT::NewFunc_t newFunc)
                         void SetNewArray(ROOT::NewArrFunc_t newArrayFunc)
                         void SetStreamer(const char* name, Streamer_t p)
               TStreamerInfo* SetStreamerInfo(Int_t version, const char* info)
                         void SetUnloaded()
                 virtual void ShowMembers(TMemberInspector& insp, char* parent)
                        Int_t Size() const
                         void Store(TBuffer& b) const
                         void Streamer(void* object, TBuffer& b)
                 virtual void Streamer(TBuffer& b)
                         void StreamerNVirtual(TBuffer& b)
                        Int_t WriteBuffer(TBuffer& b, void* pointer, const char* info)

Data Members

    private:

                   TObjArray* fStreamerInfo    Array of TStreamerInfo
                       TList* fRealData        linked list for persistent members including base classes
                       TList* fBase            linked list for base classes
                       TList* fData            linked list for data members
                       TList* fMethod          linked list for methods
                       TList* fAllPubData      all public data members (including from base classes)
                       TList* fAllPubMethod    all public methods (including from base classes)
                  const char* fDeclFileName    name of class declaration file
                  const char* fImplFileName    name of class implementation file
                      Short_t fDeclFileLine    line of class declaration
                      Short_t fImplFileLine    line of class implementation
                       UInt_t fInstanceCount   number of instances of this class
                       UInt_t fOnHeap          number of instances on heap
                       UInt_t fCheckSum        checksum of data members and base classes
                    Version_t fClassVersion    Class version Identifier
                G__ClassInfo* fClassInfo       pointer to CINT class info class
                       TList* fClassMenuList   list of class menu items
             const type_info* fTypeInfo        pointer to the C++ type information.
            ShowMembersFunc_t fShowMembers     pointer to the class's ShowMembers function
                    IsAFunc_t fIsA             pointer to the class's IsA function.
                        void* fNew             pointer to a function newing one object.
                        void* fNewArray        pointer to a function newing an array of objects.
                        void* fDelete          pointer to a function deleting one object.
                        void* fDeleteArray     pointer to a function deleting an array of objects.
                        void* fDestructor      pointer to a function call an object's destructor.
                       Bool_t fVersionUsed     !Indicates whether GetClassVersion has been called
                       Long_t fProperty        !Property
                        void* fInterStreamer   !saved info to call Streamer
                       Long_t fOffsetStreamer  !saved info to call Streamer
      static TClass::ENewType fgCallingNew     Intent of why/how TClass::New() is called
                 static Int_t fgClassCount     provides unique id for a each class

    public:

         static const enum TClass:: kClassSaved             
         static const enum TClass:: kIgnoreTObjectStreamer  
         static const enum TClass:: kUnloaded               
         static const enum TClass:: kIsTObject              
         static const enum TClass:: kIsForeign              
         static const enum TClass:: kIsEmulation            
      static const TClass::ENewType kRealNew                
      static const TClass::ENewType kClassNew               
      static const TClass::ENewType kDummyNew               
         static const enum TClass:: kLoading                

See also

TQClass

Class Description

                                                                      
  The ROOT global object gROOT contains a list of all defined         
  classes. This list is build when a reference to a class dictionary  
  is made. When this happens, the static "class"::Dictionary()        
  function is called to create a TClass object describing the         
  class. The Dictionary() function is defined in the ClassDef         
  macro and stored (at program startup or library load time) together 
  with the class name in the TClassTable singleton object.            
  For a description of all dictionary classes see TDictionary.        
                                                                      

 Default ctor.

 Create a TClass object. This object contains the full dictionary
 of a class. It has list to baseclasses, datamembers and methods.
 Use this ctor to create a standalone TClass object. Most useful
 to get a TClass interface to an interpreted class. Used by TTabCom.
 Normally you would use gROOT->GetClass("class") to get access to a
 TClass object for a certain class.

 Create a TClass object. This object contains the full dictionary
 of a class. It has list to baseclasses, datamembers and methods.

 Create a TClass object. This object contains the full dictionary
 of a class. It has list to baseclasses, datamembers and methods.

 Initialize a TClass object. This object contains the full dictionary
 of a class. It has list to baseclasses, datamembers and methods.

 TClass dtor. Deletes all list that might have been created.

 Browse external object inherited from TObject.
 It passes through inheritance tree and calls TBrowser::Add
 in appropriate cases. Static function.

 This method is called by a browser to get the class information.

 Build a full list of persistent data members.
 Scans the list of all data members in the class itself and also
 in all base classes. For each persistent data member, inserts a
 TRealData object in the list fRealData.

 If pointer is not 0, uses the object at pointer
 otherwise creates a temporary object of this class.

 Build the list of real data for a fake class

 Draw detailed class inheritance structure.
 If a class B inherits from a class A, the description of B is drawn
 on the right side of the description of A.
 Member functions overridden by B are shown in class A with a blue line
 erasing the corresponding member function

 Introduce an escape character (@) in front of a special chars.
 You need to use the result immediately before it is being overwritten.

 Return a pointer the the real class of the object.
 This is equivalent to object->IsA() when the class has a ClassDef.
 It is REQUIRED that object is coming from a proper pointer to the
 class represented by 'this'.
 Example: Special case:
    class MyClass : public AnotherClass, public TObject
 then on return, one must do:
    TObject *obj = (TObject*)((void*)myobject)directory->Get("some object of MyClass");
    MyClass::Class()->GetActualClass(obj); // this would be wrong!!!
 Also if the class represented by 'this' and NONE of its parents classes
 have a virtual ptr table, the result will be 'this' and NOT the actual
 class.

 Return pointer to the base class "classname". Returns 0 in case
 "classname" is not a base class. Takes care of multiple inheritance.

 Return pointer to the base class "cl". Returns 0 in case "cl"
 is not a base class. Takes care of multiple inheritance.

 Return data member offset to the base class "cl".
 Returns -1 in case "cl" is not a base class.
 Takes care of multiple inheritance.

 Return pointer to (base) class that contains datamember.

 Return pointer to datamember object with name "datamember".

 return offset for member name. name can be a data member in
 the class itself, one of its base classes, or one member in
 one of the aggregated classes.

 In case of a fake class, the list of fake TRealData is built

 return pointer to TRealData element with name.
 name can be a data member in the class itself,
 one of its base classes, or one member in
 one of the aggregated classes.

 In case of a fake class, the list of fake TRealData is built

 Return list containing the TBaseClass(es) of a class.

 Return list containing the TDataMembers of a class.

 Return list containing the TMethods of a class.

 Returns a list of all public methods of this class and its base classes.
 Refers to a subset of the methods in GetListOfMethods() so don't do
 GetListOfAllPublicMethods()->Delete().
 Algorithm used to get the list is:
 - put all methods of the class in the list (also protected and private
   ones).
 - loop over all base classes and add only those methods not already in the
   list (also protected and private ones).
 - once finished, loop over resulting list and remove all private and
   protected methods.

 Returns a list of all public data members of this class and its base
 classes. Refers to a subset of the data members in GetListOfDatamembers()
 so don't do GetListOfAllPublicDataMembers()->Delete().

 Returns list of methods accessible by context menu.

 Resets the menu list to it's standard value.

 Makes a customizable version of the popup menu list, i.e. makes a list
 of TClassMenuItem objects of methods accessible by context menu.
 The standard (and different) way consists in having just one element
 in this list, corresponding to the whole standard list.
 Once the customizable version is done, one can remove or add elements.

 Return pointer to method without looking at parameters.
 Does not look in (possible) base classes.

 Return pointer to method without looking at parameters.
 Does look in all base classes.

 Find the best method (if there is one) matching the parameters.
 The params string must contain argument values, like "3189, "aap", 1.3".
 The function invokes GetClassMethod to search for a possible method
 in the class itself or in its base classes. Returns 0 in case method
 is not found.

 Find the method with a given prototype. The proto string must be of the
 form: "char*,int,double". Returns 0 in case method is not found.

 Look for a method in this class that has the interface function
 address faddr.

 Look for a method in this class that has the name and
 signature

 Return the number of data members of this class
 Note that in case the list of data members is not yet created, it will be done
 by GetListOfDataMembers().

 Return the number of methods of this class
 Note that in case the list of methods is not yet created, it will be done
 by GetListOfMethods().

 returns a pointer to the TStreamerInfo object for version
 If the object doest not exist, it is created

  When the class kIgnoreTObjectStreamer bit is set, the automatically
  generated Streamer will not call TObject::Streamer.
  This option saves the TObject space overhead on the file.
  However, the information (fBits, fUniqueID) of TObject is lost.

  Note that this function must be called for the class deriving
  directly from TObject, eg, assuming that BigTrack derives from Track
  and Track derives from TObject, one must do:
     Track::Class()->IgnoreTObjectStreamer();
  and not:
     BigTrack::Class()->IgnoreTObjectStreamer();

 Return kTRUE if this class inherits from a class with name "classname".

 Return kTRUE if this class inherits from class cl.

 Cast obj of this class type up to baseclass cl if up is true.
 Cast obj of this class type down from baseclass cl if up is false.
 If this class is not a baseclass of cl return 0, else the pointer
 to the cl part of this (up) or to this (down).

 Return a pointer to a newly allocated object of this class.
 The class must have a default constructor. For meaning of
 defConstructor, see TClass::IsCallingNew().

 Return a pointer to a newly allocated object of this class.
 The class must have a default constructor. For meaning of
 defConstructor, see TClass::IsCallingNew().

 Explicitely call destructor for object.

 Return size of object of this class.

 Load class description from I/O buffer and return class object.

 Store class description on I/O buffer.

 Return true if the shared library of this class is currently in the a
 process's memory.  Return false, after the shared library has been
 unloaded or if this is a 'fake' class created from a file's StreamerInfo.

 Call this method to indicate that the shared library containing this
 class's code has been removed (unloaded) from the process's memory

 Info is a string describing the names and types of attributes
 written by the class Streamer function.
 If info is an empty string (when called by TObject::StreamerInfo)
 the default Streamer info string is build. This corresponds to
 the case of an automatically generated Streamer.
 In case of user defined Streamer function, it is the user responsability
 to implement a StreamerInfo function (override TObject::StreamerInfo).
 The user must call IsA()->SetStreamerInfo(info) from this function.

 Compute and/or return the class check sum.
 The class ckecksum is used by the automatic schema evolution algorithm
 to uniquely identify a class version.
 The check sum is built from the names/types of base classes and
 data members.
 Algorithm from Victor Perevovchikov (perev@bnl.gov).

 if code==1 data members of type enum are not counted in the checksum

 Store pointer to function to Stream non basic member name.

 Function called by the Streamer functions to deserialize information
 from buffer b into object at p.
 This function assumes that the class version and the byte count information
 have been read.
   version  is the version number of the class
   start    is the starting position in the buffer b
   count    is the number of bytes for this object in the buffer

 Function called by the Streamer functions to deserialize information
 from buffer b into object at p.

 Function called by the Streamer functions to serialize object at p
 to buffer b. The optional argument info may be specified to give an
 alternative StreamerInfo instead of using the default StreamerInfo
 automatically built from the class definition.
 For more information, see class TStreamerInfo.

Inline Functions

                     void SetClassVersion(Version_t version)
                     void AddInstance(Bool_t heap = kFALSE)
                   Bool_t CanIgnoreTObjectStreamer()
                Version_t GetClassVersion() const
              const char* GetDeclFileName() const
                  Short_t GetDeclFileLine() const
            G__ClassInfo* GetClassInfo() const
                   TList* GetListOfRealData() const
              const char* GetImplFileName() const
                  Short_t GetImplFileLine() const
                   UInt_t GetInstanceCount() const
                   UInt_t GetHeapInstanceCount() const
                   TList* GetMenuList() const
        ShowMembersFunc_t GetShowMembersWrapper()
               TObjArray* GetStreamerInfos() const
         const type_info* GetTypeInfo() const
                   Bool_t IsFolder() const
                     void ResetInstanceCount()
         TClass::ENewType IsCallingNew()
                  TClass* Class()
                  TClass* IsA() const
                     void ShowMembers(TMemberInspector& insp, char* parent)
                     void Streamer(TBuffer& b)
                     void StreamerNVirtual(TBuffer& b)
                   TClass TClass(const TClass&)