This object / class contains one or more message handlers

This object / class has a virtual method table This object / class has a destructor method This object / class has a constructor method This object / class contains protected fields or methods This object / class contains private fields or methods This object / class contains virtual methods This flag is set to indicate that the object has been declared in a type section, but there is no implementation yet. This is a delphi styled class declaration, and not a Turbo Pascal object. VMT_Offset : Longint // This is the offset from the start // of the object image in memory // where the virtual method table is // located. ObjectOptions : TObjectOptions // The options for this object, see // the following table for the possible // options for the object. ObjName : PString // This is the object name SymTable : PSymTable // This is a pointer to the symbol // table entries within this object. It is set to nil, if // this object definition has no parent. Type PObjectDef = ^ TObjectDef TObjectDef = object ( TDef ) ChildOf : PObjectDef // This is a pointer to the parent object // definition.

These types are always defined when compiling any unit or program. Furthermore, internally, a definition for a Text file type and untyped File type are created when the system unit is loaded. The file definition can occur in only some rare instances, when a file of type is parsed, a file definition of that type will be created. GlobalNb : Longint // Internal stabs debug information type signature // (each type definition has a numeric // signature). Has_InitTable : Boolean Has_Rtti : Boolean Is_Def_Stab_Written : TDefStabStatus // Can be one of the following states : // (Not_Written, written, Being_Written) // which indicates if the debug information // for this type has been defined or not. NextGlobal : PDef PreviousGlobal : PDef SaveSize : Longint // Size in bytes of the data definition DefType : TDefType // Indicates the definition type (see table ?). Type PDef = ^ TDef TDef = object ( TSymTableEntry ) TypeSym : PTypeSym // Pointer to symbol table entry for this type // definition InitTable_Label : PAsmLabel // Label to initialization information (required // for some complex types) Rtti_Label : PAsmLabel // Label to the runtime type information. Therefore all derived object all posess the fields in this object in addition to their own private fields. The current possible definition types are enumerated in TDefType and can have one of the following symbolic values:Įrror definition (empty, used for error recovery)Īll type definitions are based on this object. The definition types are associated with symbols in the symbol table, and are used by the parsing process (among other things) to perform type checking. Type TType = object Sym : PSym // Points to the symbol table of this type Def : PDef // Points to the actual definition of this type end Definition typesĭefinitions represent the type information for all possible symbols which can be encountered by the parser. 1.2.17 enumeration definition (TEnumDef)Ī type declaration, which is the basis for the symbol table, since inherently everything comes down to a type after parsing is a special structure with two principal fields, which point to a symbol table entry which is the type name, and the actual definition which gives the information on other symbols in the type, the size of the type and other such information.1.2.14 procedural variable definition (TProcVarDef).

1.2.13 abstract procedure definition (tabstractprocdef).1.2.8 class reference definition (TClassRefDef).bytes), and handle something back from that memory using a typecast, then you are bypassing automatic allocation and destruction.Īll other ways to make space for complex types (records and classes) as well as types which may hold complex types (arrays and nested fields) will safely and reliably use Initialize and Finalize when needed if they are defined. In other words, if you declare a raw pointer, allocate untyped memory (e.g. Intentional circumvention might include allocating raw memory in a class and treating the class like an array with an index property. The change we're talking about automatically invokes Initialize and Finalize on all types for dynamic allocations / destruction, unless they intentionally circumvent it. Keep in mind fpc, the compiler, is separate from Lazarus, but if you want to use Lazarus with fpc 3.1.x you need to build Lazarus using fpc 3.1.x. You'll need to build it yourself which isn't that hard. The odd minor versions are never released as official builds, but they are official versions.

Free pascal define type