Class hierarchy¶

TObject (System)
- TInterfacedObject (System)
  - TInterfaceThunk (System)
  - TSimpleRWSync (sysutils)
  - TMultiReadExclusiveWriteSynchronizer (sysutils)
  - TStreamAdapter (Classes)
  - TInterfaceList (Classes)
- TAggregatedObject (System)
  - TContainedObject (System)
- TNoRefCountObject (System)
- TCustomAttribute (System)
  - TUnimplementedAttribute (System)
    - WeakAttribute (System)
    - UnsafeAttribute (System)
    - RefAttribute (System)
    - VolatileAttribute (System)
  - StoredAttribute (System)
  - ObservableMemberAttribute (Classes)
  - ComponentPlatformsAttribute (Classes)
- TMarshal (System)
- TBitConverter (Types)
- TAnsiStringBuilder (sysutils)
- TUnicodeStringBuilder (sysutils)
- Exception (sysutils)
  - EExternal (sysutils)
    - EIntError (sysutils)
      - EDivByZero (sysutils)
      - ERangeError (sysutils)
      - EIntOverflow (sysutils)
    - EMathError (sysutils)
      - EInvalidOp (sysutils)
      - EZeroDivide (sysutils)
      - EOverflow (sysutils)
      - EUnderflow (sysutils)
      - EInvalidArgument (Math)
    - EExternalException (sysutils)
    - EAccessViolation (sysutils)
      - EBusError (sysutils)
    - EPrivilege (sysutils)
    - EStackOverflow (sysutils)
    - EControlC (sysutils)
  - EInOutError (sysutils)
  - EHeapMemoryError (sysutils)
    - EInvalidPointer (sysutils)
    - EOutOfMemory (sysutils)
      - EOutOfResources (Classes)
  - EInvalidCast (sysutils)
  - EVariantError (sysutils)
    - EVariantParamNotFoundError (Variants)
    - EVariantInvalidOpError (Variants)
      - EVariantInvalidNullOpError (Variants)
    - EVariantTypeCastError (Variants)
    - EVariantOverflowError (Variants)
      - EVariantRangeCheckError (Variants)
    - EVariantInvalidArgError (Variants)
    - EVariantBadVarTypeError (Variants)
    - EVariantBadIndexError (Variants)
    - EVariantArrayLockedError (Variants)
    - EVariantNotAnArrayError (Variants)
    - EVariantArrayCreateError (Variants)
    - EVariantNotImplError (Variants)
    - EVariantOutOfMemoryError (Variants)
    - EVariantUnexpectedError (Variants)
    - EVariantDispatchError (Variants)
  - EConvertError (sysutils)
  - EFormatError (sysutils)
  - EAbort (sysutils)
  - EAbstractError (sysutils)
  - EAssertionFailed (sysutils)
  - EObjectCheck (sysutils)
  - EThreadError (sysutils)
  - ESigQuit (sysutils)
  - EPropReadOnly (sysutils)
  - EPropWriteOnly (sysutils)
  - EIntfCastError (sysutils)
  - EInvalidContainer (sysutils)
  - EInvalidInsert (sysutils)
  - EPackageError (sysutils)
  - ECFError (sysutils)
  - EOSError (sysutils)
  - ESafecallException (sysutils)
  - ENoThreadSupport (sysutils)
  - ENoWideStringSupport (sysutils)
  - ENoDynLibsSupport (sysutils)
  - EProgrammerNotFound (sysutils)
  - EMonitor (sysutils)
    - EMonitorLockException (sysutils)
    - ENoMonitorSupportException (sysutils)
  - EObjectDisposed (sysutils)
  - ENotImplemented (sysutils)
  - EArgumentException (sysutils)
    - EArgumentOutOfRangeException (sysutils)
    - EArgumentNilException (sysutils)
    - EInOutArgumentException (sysutils)
  - EPathTooLongException (sysutils)
  - ENotSupportedException (sysutils)
  - EDirectoryNotFoundException (sysutils)
  - EFileNotFoundException (sysutils)
  - EPathNotFoundException (sysutils)
  - EInvalidOpException (sysutils)
  - ENoConstructException (sysutils)
  - EListError (sysutils)
  - EOperationCancelled (sysutils)
  - EEncodingError (sysutils)
  - TMREWException (sysutils)
  - EPropertyError (TypInfo)
  - EPropertyConvertError (TypInfo)
  - EStreamError (Classes)
    - EFCreateError (Classes)
    - EFOpenError (Classes)
    - EFilerError (Classes)
      - EReadError (Classes)
      - EWriteError (Classes)
      - EClassNotFound (Classes)
      - EMethodNotFound (Classes)
      - EInvalidImage (Classes)
  - EResNotFound (Classes)
  - EBitsError (Classes)
  - EStringListError (Classes)
  - EComponentError (Classes)
  - EParserError (Classes)
  - EInvalidOperation (Classes)
  - EObserver (Classes)
  - EObserverException (Classes)
  - EThread (Classes)
    - EThreadExternalException (Classes)
    - EThreadDestroyCalled (Classes)
  - ELocalTimeInvalid (DateUtils)
  - EDateTimeException (DateUtils)
  - EListError (fgl)
- TEncoding (sysutils)
  - TMBCSEncoding (sysutils)
    - TUTF7Encoding (sysutils)
      - TUTF8Encoding (sysutils)
  - TUnicodeEncoding (sysutils)
    - TBigEndianUnicodeEncoding (sysutils)
- TPoint (Objects)
- TRect (Objects)
- TObject (Objects)
  - TStream (Objects)
    - TDosStream (Objects)
      - TBufStream (Objects)
    - TMemoryStream (Objects)
  - TCollection (Objects)
    - TSortedCollection (Objects)
      - TStringCollection (Objects)
        
        TUnSortedStrCollection (Objects)
        
        TResourceCollection (Objects)
      - TStrCollection (Objects)
  - TResourceFile (Objects)
  - TStringList (Objects)
  - TStrListMaker (Objects)
- tport (ports)
- tportw (ports)
- tportl (ports)
- TObservers (Classes)
- TLinkObservers (Classes)
- TObserverMapping (Classes)
- TFPListEnumerator (Classes)
  - TListEnumerator (Classes)
- TFPList (Classes)
- TList (Classes)
- TThreadList (Classes)
- TBits (Classes)
- TPersistent (Classes)
  - TInterfacedPersistent (Classes)
  - TCollectionItem (Classes)
  - TCollection (Classes)
    - TOwnedCollection (Classes)
  - TStrings (Classes)
    - TStringList (Classes)
  - TComponent (Classes)
    - TBasicAction (Classes)
    - TDataModule (Classes)
- TRecall (Classes)
- TCollectionEnumerator (Classes)
- TStringsEnumerator (Classes)
- TStream (Classes)
  - TProxyStream (Classes)
  - TOwnerStream (Classes)
  - THandleStream (Classes)
    - TFileStream (Classes)
  - TCustomMemoryStream (Classes)
    - TMemoryStream (Classes)
      - TBytesStream (Classes)
        
        TStringStream (Classes)
        
        TRawByteStringStream (Classes)
    - TResourceStream (Classes)
  - TProxyAggregateStream (Classes)
- TFiler (Classes)
  - TReader (Classes)
  - TWriter (Classes)
- TAbstractObjectReader (Classes)
  - TBinaryObjectReader (Classes)
- TAbstractObjectWriter (Classes)
  - TBinaryObjectWriter (Classes)
  - TTextObjectWriter (Classes)
- TParser (Classes)
- TThread (Classes)
- TComponentEnumerator (Classes)
- TBasicActionLink (Classes)
- TInterfaceListEnumerator (Classes)
- TTimeZone (DateUtils)
- TCustomVariantType (Variants)
  - TInvokeableVariantType (Variants)
    - TPublishableVariantType (Variants)
- TFPSList (fgl)
  - TFPGList (fgl)
  - TFPGObjectList (fgl)
  - TFPGInterfacedObjectList (fgl)
  - TFPSMap (fgl)
    - TFPGMap (fgl)
    - TFPGMapObject (fgl)
    - TFPGMapInterfacedObjectData (fgl)
- TFPGListEnumerator (fgl)
- TCharacter (Character)