freepascal.compiler/compiler/symdef.pas

{
    Symbol table implementation for the definitions

    Copyright (c) 1998-2005 by Florian Klaempfl, Pierre Muller

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 ****************************************************************************
}
unit symdef;

{$i fpcdefs.inc}

interface

    uses
       { common }
       cclasses,
       { global }
       globtype,globals,tokens,
       { symtable }
       symconst,symbase,symtype,
       { ppu }
       ppu,
       { node }
       node,
       { aasm }
       aasmbase,aasmtai,aasmdata,
       cpubase,cpuinfo,
       cgbase,cgutils,
       parabase
       ;


    type
{************************************************
                    TDef
************************************************}

       tstoreddef = class(tdef)
       protected
          typesymderef  : tderef;
       public
          { persistent (available across units) rtti and init tables }
          rttitablesym,
          inittablesym  : tsym; {trttisym}
          rttitablesymderef,
          inittablesymderef : tderef;
          { local (per module) rtti and init tables }
          localrttilab  : array[trttitype] of tasmlabel;
{$ifdef EXTDEBUG}
          fileinfo   : tfileposinfo;
{$endif}
          { generic support }
          genericdef      : tstoreddef;
          genericdefderef : tderef;
          generictokenbuf : tdynamicarray;
          constructor create(dt:tdeftype);
          constructor ppuload(dt:tdeftype;ppufile:tcompilerppufile);
          destructor  destroy;override;
          procedure reset;virtual;
          function getcopy : tstoreddef;virtual;
          procedure ppuwrite(ppufile:tcompilerppufile);virtual;
          procedure buildderef;override;
          procedure buildderefimpl;override;
          procedure deref;override;
          procedure derefimpl;override;
          function  size:aint;override;
          function  getvardef:longint;override;
          function  alignment:shortint;override;
          function  is_publishable : boolean;override;
          function  needs_inittable : boolean;override;
          { rtti generation }
          procedure write_rtti_name;
          procedure write_rtti_data(rt:trttitype);virtual;
          procedure write_child_rtti_data(rt:trttitype);virtual;
          function  get_rtti_label(rt:trttitype):tasmsymbol;
          { regvars }
          function is_intregable : boolean;
          function is_fpuregable : boolean;
          { generics }
          procedure initgeneric;
       private
          savesize  : aint;
       end;

       tfiletyp = (ft_text,ft_typed,ft_untyped);

       tfiledef = class(tstoreddef)
          filetyp : tfiletyp;
          typedfiledef : tdef;
          typedfiledefderef : tderef;
          constructor createtext;
          constructor createuntyped;
          constructor createtyped(def : tdef);
          constructor ppuload(ppufile:tcompilerppufile);
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          procedure buildderef;override;
          procedure deref;override;
          function  GetTypeName:string;override;
          function  getmangledparaname:string;override;
          procedure setsize;
       end;

       tvariantdef = class(tstoreddef)
          varianttype : tvarianttype;
          constructor create(v : tvarianttype);
          constructor ppuload(ppufile:tcompilerppufile);
          function getcopy : tstoreddef;override;
          function GetTypeName:string;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          procedure setsize;
          function is_publishable : boolean;override;
          function needs_inittable : boolean;override;
          procedure write_rtti_data(rt:trttitype);override;
       end;

       tformaldef = class(tstoreddef)
          constructor create;
          constructor ppuload(ppufile:tcompilerppufile);
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  GetTypeName:string;override;
       end;

       tforwarddef = class(tstoreddef)
          tosymname : pshortstring;
          forwardpos : tfileposinfo;
          constructor create(const s:string;const pos : tfileposinfo);
          destructor destroy;override;
          function  GetTypeName:string;override;
       end;

       tundefineddef = class(tstoreddef)
          constructor create;
          constructor ppuload(ppufile:tcompilerppufile);
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  GetTypeName:string;override;
       end;

       terrordef = class(tstoreddef)
          constructor create;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  GetTypeName:string;override;
          function  getmangledparaname : string;override;
       end;

       tabstractpointerdef = class(tstoreddef)
          pointeddef : tdef;
          pointeddefderef : tderef;
          constructor create(dt:tdeftype;def:tdef);
          constructor ppuload(dt:tdeftype;ppufile:tcompilerppufile);
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          procedure buildderef;override;
          procedure deref;override;
       end;

       tpointerdef = class(tabstractpointerdef)
          is_far : boolean;
          constructor create(def:tdef);
          constructor createfar(def:tdef);
          function getcopy : tstoreddef;override;
          constructor ppuload(ppufile:tcompilerppufile);
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  GetTypeName:string;override;
       end;

       tabstractrecorddef= class(tstoreddef)
       private
          Count         : integer;
          FRTTIType     : trttitype;
          procedure count_field_rtti(sym : tnamedindexitem;arg:pointer);
          procedure write_field_rtti(sym : tnamedindexitem;arg:pointer);
          procedure generate_field_rtti(sym : tnamedindexitem;arg:pointer);
       public
          symtable : tsymtable;
          procedure reset;override;
          function  getsymtable(t:tgetsymtable):tsymtable;override;
          function is_packed:boolean;
       end;

       trecorddef = class(tabstractrecorddef)
       public
          isunion       : boolean;
          constructor create(p : tsymtable);
          constructor ppuload(ppufile:tcompilerppufile);
          destructor destroy;override;
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          procedure buildderef;override;
          procedure deref;override;
          function  size:aint;override;
          function  alignment : shortint;override;
          function  padalignment: shortint;
          function  GetTypeName:string;override;
          { debug }
          function  needs_inittable : boolean;override;
          { rtti }
          procedure write_child_rtti_data(rt:trttitype);override;
          procedure write_rtti_data(rt:trttitype);override;
       end;

       tprocdef = class;
       tobjectdef = class;

       { TImplementedInterface }

       TImplementedInterface = class
         IntfDef      : tobjectdef;
         IntfDefDeref : tderef;
         IOffset      : longint;
         VtblImplIntf   : TImplementedInterface;
         NameMappings : TFPHashList;
         ProcDefs     : TFPObjectList;
         constructor create(aintf: tobjectdef);
         constructor create_deref(d:tderef);
         destructor  destroy; override;
         function  getcopy:TImplementedInterface;
         procedure buildderef;
         procedure deref;
         procedure AddMapping(const origname, newname: string);
         function  GetMapping(const origname: string):string;
         procedure AddImplProc(pd:tprocdef);
         function  IsImplMergePossible(MergingIntf:TImplementedInterface;out weight: longint): boolean;
       end;
       
       { tobjectdef }

       tobjectdef = class(tabstractrecorddef)
       private
          procedure count_published_properties(sym:tnamedindexitem;arg:pointer);
          procedure collect_published_properties(sym:tnamedindexitem;arg:pointer);
          procedure write_property_info(sym : tnamedindexitem;arg:pointer);
          procedure generate_published_child_rtti(sym : tnamedindexitem;arg:pointer);
          procedure count_published_fields(sym:tnamedindexitem;arg:pointer);
          procedure writefields(sym:tnamedindexitem;arg:pointer);
       public
          childof        : tobjectdef;
          childofderef   : tderef;
          objname,
          objrealname    : pshortstring;
          objectoptions  : tobjectoptions;
          { to be able to have a variable vmt position }
          { and no vmt field for objects without virtuals }
          vmt_offset     : longint;
          writing_class_record_dbginfo : boolean;
          objecttype     : tobjectdeftype;
          iidguid        : pguid;
          iidstr         : pshortstring;
          iitype         : tinterfaceentrytype;
          iioffset       : longint;
          lastvtableindex: longint;
          { store implemented interfaces defs and name mappings }
          ImplementedInterfaces : TFPObjectList;
          constructor create(ot : tobjectdeftype;const n : string;c : tobjectdef);
          constructor ppuload(ppufile:tcompilerppufile);
          destructor  destroy;override;
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function GetTypeName:string;override;
          procedure buildderef;override;
          procedure deref;override;
          function  getparentdef:tdef;override;
          function  size : aint;override;
          function  alignment:shortint;override;
          function  vmtmethodoffset(index:longint):longint;
          function  members_need_inittable : boolean;
          function  find_implemented_interface(aintfdef:tobjectdef):TImplementedInterface;
          { this should be called when this class implements an interface }
          procedure prepareguid;
          function  is_publishable : boolean;override;
          function  needs_inittable : boolean;override;
          function  vmt_mangledname : string;
          function  rtti_name : string;
          procedure check_forwards;
          function  is_related(d : tdef) : boolean;override;
          procedure insertvmt;
          procedure set_parent(c : tobjectdef);
          function searchdestructor : tprocdef;
          { rtti }
          procedure write_child_rtti_data(rt:trttitype);override;
          procedure write_rtti_data(rt:trttitype);override;
          function generate_field_table : tasmlabel;
       end;

       tclassrefdef = class(tabstractpointerdef)
          constructor create(def:tdef);
          constructor ppuload(ppufile:tcompilerppufile);
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function GetTypeName:string;override;
          function  is_publishable : boolean;override;
       end;

       tarraydef = class(tstoreddef)
          lowrange,
          highrange  : aint;
          rangedef   : tdef;
          rangedefderef : tderef;
          arrayoptions : tarraydefoptions;
       protected
          _elementdef : tdef;
          _elementdefderef : tderef;
          procedure setelementdef(def:tdef);
       public
          function elesize : aint;
          function elepackedbitsize : aint;
          function elecount : aint;
          constructor create_from_pointer(def:tdef);
          constructor create(l,h : aint;def:tdef);
          constructor ppuload(ppufile:tcompilerppufile);
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  GetTypeName:string;override;
          function  getmangledparaname : string;override;
          procedure buildderef;override;
          procedure deref;override;
          function size : aint;override;
          function alignment : shortint;override;
          { returns the label of the range check string }
          function needs_inittable : boolean;override;
          procedure write_child_rtti_data(rt:trttitype);override;
          procedure write_rtti_data(rt:trttitype);override;
          property elementdef : tdef read _elementdef write setelementdef;
       end;

       torddef = class(tstoreddef)
          low,high : TConstExprInt;
          typ      : tbasetype;
          constructor create(t : tbasetype;v,b : TConstExprInt);
          constructor ppuload(ppufile:tcompilerppufile);
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  is_publishable : boolean;override;
          function  GetTypeName:string;override;
          function alignment:shortint;override;
          procedure setsize;
          function  packedbitsize: aint; override;
          function getvardef : longint;override;
          { rtti }
          procedure write_rtti_data(rt:trttitype);override;
       end;

       tfloatdef = class(tstoreddef)
          typ : tfloattype;
          constructor create(t : tfloattype);
          constructor ppuload(ppufile:tcompilerppufile);
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  GetTypeName:string;override;
          function  is_publishable : boolean;override;
          function alignment:shortint;override;
          procedure setsize;
          function  getvardef:longint;override;
          { rtti }
          procedure write_rtti_data(rt:trttitype);override;
       end;

       tabstractprocdef = class(tstoreddef)
          { saves a definition to the return type }
          returndef       : tdef;
          returndefderef  : tderef;
          parast          : tsymtable;
          paras           : tparalist;
          proctypeoption  : tproctypeoption;
          proccalloption  : tproccalloption;
          procoptions     : tprocoptions;
          requiredargarea : aint;
          { number of user visibile parameters }
          maxparacount,
          minparacount    : byte;
{$ifdef i386}
          fpu_used        : longint;    { how many stack fpu must be empty }
{$endif i386}
{$ifdef m68k}
          exp_funcretloc : tregister;   { explicit funcretloc for AmigaOS }
{$endif}
          funcretloc : array[tcallercallee] of TLocation;
          has_paraloc_info : boolean; { paraloc info is available }
          constructor create(dt:tdeftype;level:byte);
          constructor ppuload(dt:tdeftype;ppufile:tcompilerppufile);
          destructor destroy;override;
          procedure  ppuwrite(ppufile:tcompilerppufile);override;
          procedure buildderef;override;
          procedure deref;override;
          procedure releasemem;
          procedure calcparas;
          function  typename_paras(showhidden:boolean): string;
          procedure test_if_fpu_result;
          function  is_methodpointer:boolean;virtual;
          function  is_addressonly:boolean;virtual;
       private
          procedure count_para(p:tnamedindexitem;arg:pointer);
          procedure insert_para(p:tnamedindexitem;arg:pointer);
       end;

       tprocvardef = class(tabstractprocdef)
          constructor create(level:byte);
          constructor ppuload(ppufile:tcompilerppufile);
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          procedure buildderef;override;
          procedure deref;override;
          function  getsymtable(t:tgetsymtable):tsymtable;override;
          function  size : aint;override;
          function  GetTypeName:string;override;
          function  is_publishable : boolean;override;
          function  is_methodpointer:boolean;override;
          function  is_addressonly:boolean;override;
          function  getmangledparaname:string;override;
          { rtti }
          procedure write_rtti_data(rt:trttitype);override;
       end;

       tmessageinf = record
         case integer of
           0 : (str : pshortstring);
           1 : (i : longint);
       end;

       tinlininginfo = record
          { node tree }
          code  : tnode;
          flags : tprocinfoflags;
       end;
       pinlininginfo = ^tinlininginfo;


{$ifdef oldregvars}
       { register variables }
       pregvarinfo = ^tregvarinfo;
       tregvarinfo = record
          regvars : array[1..maxvarregs] of tsym;
          regvars_para : array[1..maxvarregs] of boolean;
          regvars_refs : array[1..maxvarregs] of longint;

          fpuregvars : array[1..maxfpuvarregs] of tsym;
          fpuregvars_para : array[1..maxfpuvarregs] of boolean;
          fpuregvars_refs : array[1..maxfpuvarregs] of longint;
       end;
{$endif oldregvars}

       tprocdef = class(tabstractprocdef)
       private
          _mangledname : pshortstring;
       public
          extnumber      : word;
          messageinf : tmessageinf;
{$ifndef EXTDEBUG}
          { where is this function defined and what were the symbol
            flags, needed here because there
            is only one symbol for all overloaded functions
            EXTDEBUG has fileinfo in tdef (PFV) }
          fileinfo : tfileposinfo;
{$endif}
          symoptions : tsymoptions;
          { symbol owning this definition }
          procsym : tsym;
          procsymderef : tderef;
          { alias names }
          aliasnames : tstringlist;
          { symtables }
          localst : tsymtable;
          funcretsym : tsym;
          funcretsymderef : tderef;
          { browser info }
          lastref,
          defref,
          lastwritten : tref;
          refcount : longint;
          _class : tobjectdef;
          _classderef : tderef;
{$if defined(powerpc) or defined(m68k)}
          { library symbol for AmigaOS/MorphOS }
          libsym : tsym;
          libsymderef : tderef;
{$endif powerpc or m68k}
          { name of the result variable to insert in the localsymtable }
          resultname : stringid;
          { true, if the procedure is only declared
            (forward procedure) }
          forwarddef,
          { true if the procedure is declared in the interface }
          interfacedef : boolean;
          { true if the procedure has a forward declaration }
          hasforward : boolean;
          { import info }
          import_dll,
          import_name : pshortstring;
          import_nr   : word;
          { info for inlining the subroutine, if this pointer is nil,
            the procedure can't be inlined }
          inlininginfo : pinlininginfo;
{$ifdef oldregvars}
          regvarinfo: pregvarinfo;
{$endif oldregvars}
          { position in aasmoutput list }
          procstarttai,
          procendtai   : tai;
          constructor create(level:byte);
          constructor ppuload(ppufile:tcompilerppufile);
          destructor  destroy;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          procedure buildderef;override;
          procedure buildderefimpl;override;
          procedure deref;override;
          procedure derefimpl;override;
          procedure reset;override;
          function  getsymtable(t:tgetsymtable):tsymtable;override;
          function GetTypeName : string;override;
          function  mangledname : string;
          procedure setmangledname(const s : string);
          procedure load_references(ppufile:tcompilerppufile;locals:boolean);
          function  write_references(ppufile:tcompilerppufile;locals:boolean):boolean;
          { inserts the local symbol table, if this is not
            no local symbol table is built. Should be called only
            when we are sure that a local symbol table will be required.
          }
          procedure insert_localst;
          function  fullprocname(showhidden:boolean):string;
          function  cplusplusmangledname : string;
          function  is_methodpointer:boolean;override;
          function  is_addressonly:boolean;override;
          function  is_visible_for_object(currobjdef,contextobjdef:tobjectdef):boolean;
       end;

       { single linked list of overloaded procs }
       pprocdeflist = ^tprocdeflist;
       tprocdeflist = record
         def  : tprocdef;
         defderef : tderef;
         next : pprocdeflist;
       end;

       tstringdef = class(tstoreddef)
          string_typ : tstringtype;
          len        : aint;
          constructor createshort(l : byte);
          constructor loadshort(ppufile:tcompilerppufile);
          constructor createlong(l : aint);
          constructor loadlong(ppufile:tcompilerppufile);
          constructor createansi(l : aint);
          constructor loadansi(ppufile:tcompilerppufile);
          constructor createwide(l : aint);
          constructor loadwide(ppufile:tcompilerppufile);
          function getcopy : tstoreddef;override;
          function  stringtypname:string;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          function  GetTypeName:string;override;
          function  getmangledparaname:string;override;
          function  is_publishable : boolean;override;
          function alignment : shortint;override;
          { init/final }
          function  needs_inittable : boolean;override;
          { rtti }
          procedure write_rtti_data(rt:trttitype);override;
       end;

       tenumdef = class(tstoreddef)
          minval,
          maxval    : aint;
          has_jumps : boolean;
          firstenum : tsym;  {tenumsym}
          basedef   : tenumdef;
          basedefderef : tderef;
          constructor create;
          constructor create_subrange(_basedef:tenumdef;_min,_max:aint);
          constructor ppuload(ppufile:tcompilerppufile);
          destructor destroy;override;
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          procedure buildderef;override;
          procedure deref;override;
          procedure derefimpl;override;
          function  GetTypeName:string;override;
          function  is_publishable : boolean;override;
          procedure calcsavesize;
          function  packedbitsize: aint; override;
          procedure setmax(_max:aint);
          procedure setmin(_min:aint);
          function  min:aint;
          function  max:aint;
          { rtti }
          procedure write_rtti_data(rt:trttitype);override;
          procedure write_child_rtti_data(rt:trttitype);override;
       end;

       tsetdef = class(tstoreddef)
          elementdef : tdef;
          elementdefderef : tderef;
          settype  : tsettype;
          setbase,
          setmax   : aint;
          constructor create(def:tdef;high : aint);
          constructor ppuload(ppufile:tcompilerppufile);
          destructor  destroy;override;
          function getcopy : tstoreddef;override;
          procedure ppuwrite(ppufile:tcompilerppufile);override;
          procedure buildderef;override;
          procedure deref;override;
          function  GetTypeName:string;override;
          function  is_publishable : boolean;override;
          { rtti }
          procedure write_rtti_data(rt:trttitype);override;
          procedure write_child_rtti_data(rt:trttitype);override;
       end;

       Tdefmatch=(dm_exact,dm_equal,dm_convertl1);

    var
       aktobjectdef : tobjectdef;  { used for private functions check !! }

    { default types }
       generrordef,              { error in definition }
       voidpointertype,           { pointer for Void-pointeddef }
       charpointertype,           { pointer for Char-pointeddef }
       widecharpointertype,       { pointer for WideChar-pointeddef }
       voidfarpointertype,
       cundefinedtype,
       cformaltype,               { unique formal definition }
       voidtype,                  { Void (procedure) }
       cchartype,                 { Char }
       cwidechartype,             { WideChar }
       booltype,                  { boolean type }
       bool16type,
       bool32type,
       bool64type,                { implement me }
       u8inttype,                 { 8-Bit unsigned integer }
       s8inttype,                 { 8-Bit signed integer }
       u16inttype,                { 16-Bit unsigned integer }
       s16inttype,                { 16-Bit signed integer }
       u32inttype,                { 32-Bit unsigned integer }
       s32inttype,                { 32-Bit signed integer }
       u64inttype,                { 64-bit unsigned integer }
       s64inttype,                { 64-bit signed integer }
       s32floattype,              { pointer for realconstn }
       s64floattype,              { pointer for realconstn }
       s80floattype,              { pointer to type of temp. floats }
       s64currencytype,           { pointer to a currency type }
       cshortstringtype,          { pointer to type of short string const   }
       clongstringtype,           { pointer to type of long string const   }
       cansistringtype,           { pointer to type of ansi string const  }
       cwidestringtype,           { pointer to type of wide string const  }
       openshortstringtype,       { pointer to type of an open shortstring,
                                    needed for readln() }
       openchararraytype,         { pointer to type of an open array of char,
                                    needed for readln() }
       cfiletype,                 { get the same definition for all file }
                                  { used for stabs }
       methodpointertype,         { typecasting of methodpointers to extract self }
       hresultdef,
       { we use only one variant def for every variant class }
       cvarianttype,
       colevarianttype,
       { default integer type s32inttype on 32 bit systems, s64bittype on 64 bit systems }
       sinttype,
       uinttype,
       { unsigned ord type with the same size as a pointer }
       ptrinttype,
       { several types to simulate more or less C++ objects for GDB }
       vmttype,
       vmtarraytype,
       pvmttype      : tdef;     { type of classrefs, used for stabs }

       { pointer to the anchestor of all classes }
       class_tobject : tobjectdef;
       { pointer to the ancestor of all COM interfaces }
       interface_iunknown : tobjectdef;
       { pointer to the TGUID type
         of all interfaces         }
       rec_tguid : trecorddef;

    const
{$ifdef i386}
       pbestrealtype : ^tdef = @s80floattype;
{$endif}
{$ifdef x86_64}
       pbestrealtype : ^tdef = @s80floattype;
{$endif}
{$ifdef m68k}
       pbestrealtype : ^tdef = @s64floattype;
{$endif}
{$ifdef alpha}
       pbestrealtype : ^tdef = @s64floattype;
{$endif}
{$ifdef powerpc}
       pbestrealtype : ^tdef = @s64floattype;
{$endif}
{$ifdef POWERPC64}
       pbestrealtype : ^tdef = @s64floattype;
{$endif}
{$ifdef ia64}
       pbestrealtype : ^tdef = @s64floattype;
{$endif}
{$ifdef SPARC}
       pbestrealtype : ^tdef = @s64floattype;
{$endif SPARC}
{$ifdef vis}
       pbestrealtype : ^tdef = @s64floattype;
{$endif vis}
{$ifdef ARM}
       pbestrealtype : ^tdef = @s64floattype;
{$endif ARM}
{$ifdef MIPS}
       pbestrealtype : ^tdef = @s64floattype;
{$endif MIPS}

    function make_mangledname(const typeprefix:string;st:tsymtable;const suffix:string):string;

    { should be in the types unit, but the types unit uses the node stuff :( }
    function is_interfacecom(def: tdef): boolean;
    function is_interfacecorba(def: tdef): boolean;
    function is_interface(def: tdef): boolean;
    function is_dispinterface(def: tdef): boolean;
    function is_object(def: tdef): boolean;
    function is_class(def: tdef): boolean;
    function is_cppclass(def: tdef): boolean;
    function is_class_or_interface(def: tdef): boolean;
    function is_class_or_interface_or_dispinterface(def: tdef): boolean;


{$ifdef x86}
    function use_sse(def : tdef) : boolean;
{$endif x86}

implementation

    uses
      SysUtils,
      cutils,
      { global }
      verbose,
      { target }
      systems,aasmcpu,paramgr,
      { symtable }
      symsym,symtable,symutil,defutil,
      { module }
      fmodule,
      { other }
      gendef,
      fpccrc
      ;

{****************************************************************************
                                  Constants
****************************************************************************}

    const
      varempty = 0;
      varnull = 1;
      varsmallint = 2;
      varinteger = 3;
      varsingle = 4;
      vardouble = 5;
      varcurrency = 6;
      vardate = 7;
      varolestr = 8;
      vardispatch = 9;
      varerror = 10;
      varboolean = 11;
      varvariant = 12;
      varunknown = 13;
      vardecimal = 14;
      varshortint = 16;
      varbyte = 17;
      varword = 18;
      varlongword = 19;
      varint64 = 20;
      varqword = 21;

      varUndefined = -1;

      varstrarg = $48;
      varstring = $100;
      varany = $101;
      vardefmask = $fff;
      vararray = $2000;
      varbyref = $4000;

{****************************************************************************
                                  Helpers
****************************************************************************}

    function make_mangledname(const typeprefix:string;st:tsymtable;const suffix:string):string;
      var
        s,hs,
        prefix : string;
        oldlen,
        newlen,
        i   : longint;
        crc : dword;
        hp  : tparavarsym;
      begin
        prefix:='';
        if not assigned(st) then
         internalerror(200204212);
        { sub procedures }
        while (st.symtabletype=localsymtable) do
         begin
           if st.defowner.deftype<>procdef then
            internalerror(200204173);
           { Add the full mangledname of procedure to prevent
             conflicts with 2 overloads having both a nested procedure
             with the same name, see tb0314 (PFV) }
           s:=tprocdef(st.defowner).procsym.name;
           oldlen:=length(s);
           for i:=0 to tprocdef(st.defowner).paras.count-1 do
            begin
              hp:=tparavarsym(tprocdef(st.defowner).paras[i]);
              if not(vo_is_hidden_para in hp.varoptions) then
                s:=s+'$'+hp.vardef.mangledparaname;
            end;
           if not is_void(tprocdef(st.defowner).returndef) then
             s:=s+'$$'+tprocdef(st.defowner).returndef.mangledparaname;
           newlen:=length(s);
           { Replace with CRC if the parameter line is very long }
           if (newlen-oldlen>12) and
              ((newlen>128) or (newlen-oldlen>64)) then
             begin
               crc:=$ffffffff;
               for i:=0 to tprocdef(st.defowner).paras.count-1 do
                 begin
                   hp:=tparavarsym(tprocdef(st.defowner).paras[i]);
                   if not(vo_is_hidden_para in hp.varoptions) then
                     begin
                       hs:=hp.vardef.mangledparaname;
                       crc:=UpdateCrc32(crc,hs[1],length(hs));
                     end;
                 end;
               hs:=hp.vardef.mangledparaname;
               crc:=UpdateCrc32(crc,hs[1],length(hs));
               s:=Copy(s,1,oldlen)+'$crc'+hexstr(crc,8);
             end;
           if prefix<>'' then
             prefix:=s+'_'+prefix
           else
             prefix:=s;
           st:=st.defowner.owner;
         end;
        { object/classes symtable }
        if (st.symtabletype=objectsymtable) then
         begin
           if st.defowner.deftype<>objectdef then
            internalerror(200204174);
           prefix:=tobjectdef(st.defowner).objname^+'_$_'+prefix;
           st:=st.defowner.owner;
         end;
        { symtable must now be static or global }
        if not(st.symtabletype in [staticsymtable,globalsymtable]) then
         internalerror(200204175);
        result:='';
        if typeprefix<>'' then
          result:=result+typeprefix+'_';
        { Add P$ for program, which can have the same name as
          a unit }
        if (tsymtable(main_module.localsymtable)=st) and
           (not main_module.is_unit) then
          result:=result+'P$'+st.name^
        else
          result:=result+st.name^;
        if prefix<>'' then
          result:=result+'_'+prefix;
        if suffix<>'' then
          result:=result+'_'+suffix;
        { the Darwin assembler assumes that all symbols starting with 'L' are local }
        if (target_info.system in [system_powerpc_darwin,system_i386_darwin]) and
           (result[1] = 'L') then
          result := '_' + result;
      end;


{****************************************************************************
                     TDEF (base class for definitions)
****************************************************************************}

    constructor tstoreddef.create(dt:tdeftype);
      var
        insertstack : psymtablestackitem;
      begin
         inherited create(dt);
         savesize := 0;
{$ifdef EXTDEBUG}
         fileinfo := current_filepos;
{$endif}
         fillchar(localrttilab,sizeof(localrttilab),0);
         generictokenbuf:=nil;
         genericdef:=nil;
         { Don't register forwarddefs, they are disposed at the
           end of an type block }
         if (dt=forwarddef) then
           exit;
         { Register in current_module }
         if assigned(current_module) then
           begin
             current_module.deflist.Add(self);
             DefId:=current_module.deflist.Count-1;
           end;
         { Register in symtable stack }
         if assigned(symtablestack) then
           begin
             insertstack:=symtablestack.stack;
             while assigned(insertstack) and
                   (insertstack^.symtable.symtabletype=withsymtable) do
               insertstack:=insertstack^.next;
             if not assigned(insertstack) then
               internalerror(200602044);
             insertstack^.symtable.insertdef(self);
           end;
      end;


    destructor tstoreddef.destroy;
      begin
        { remove also index from symtable }
        if assigned(owner) then
          owner.deletedef(self);
        if assigned(generictokenbuf) then
          generictokenbuf.free;
        inherited destroy;
      end;


    constructor tstoreddef.ppuload(dt:tdeftype;ppufile:tcompilerppufile);
      var
        sizeleft,i : longint;
        buf  : array[0..255] of byte;
      begin
         inherited create(dt);
{$ifdef EXTDEBUG}
         fillchar(fileinfo,sizeof(fileinfo),0);
{$endif}
         fillchar(localrttilab,sizeof(localrttilab),0);
      { load }
         DefId:=ppufile.getlongint;
         current_module.deflist[DefId]:=self;
         indexnr:=ppufile.getword;
         ppufile.getderef(typesymderef);
         ppufile.getsmallset(defoptions);
         if df_has_rttitable in defoptions then
          ppufile.getderef(rttitablesymderef);
         if df_has_inittable in defoptions then
          ppufile.getderef(inittablesymderef);
         if df_generic in defoptions then
           begin
             sizeleft:=ppufile.getlongint;
             initgeneric;
             while sizeleft>0 do
               begin
                 if sizeleft>sizeof(buf) then
                   i:=sizeof(buf)
                 else
                   i:=sizeleft;
                 ppufile.getdata(buf,i);
                 generictokenbuf.write(buf,i);
                 dec(sizeleft,i);
               end;
           end;
        if df_specialization in defoptions then
          ppufile.getderef(genericdefderef);
      end;


    procedure Tstoreddef.reset;
      begin
        if assigned(rttitablesym) then
          trttisym(rttitablesym).lab := nil;
        if assigned(inittablesym) then
          trttisym(inittablesym).lab := nil;
        localrttilab[initrtti]:=nil;
        localrttilab[fullrtti]:=nil;
      end;


    function tstoreddef.getcopy : tstoreddef;
      begin
        Message(sym_e_cant_create_unique_type);
        getcopy:=terrordef.create;
      end;


    procedure tstoreddef.ppuwrite(ppufile:tcompilerppufile);
      var
        sizeleft,i : longint;
        buf  : array[0..255] of byte;
        oldintfcrc : boolean;
      begin
        ppufile.putlongint(DefId);
        ppufile.putword(indexnr);
        ppufile.putderef(typesymderef);
        ppufile.putsmallset(defoptions);
        if df_has_rttitable in defoptions then
         ppufile.putderef(rttitablesymderef);
        if df_has_inittable in defoptions then
         ppufile.putderef(inittablesymderef);
        if df_generic in defoptions then
          begin
            oldintfcrc:=ppufile.do_interface_crc;
            ppufile.do_interface_crc:=false;
            if assigned(generictokenbuf) then
              begin
                sizeleft:=generictokenbuf.size;
                generictokenbuf.seek(0);
              end
            else
              sizeleft:=0;
            ppufile.putlongint(sizeleft);
            while sizeleft>0 do
              begin
                if sizeleft>sizeof(buf) then
                  i:=sizeof(buf)
                else
                  i:=sizeleft;
                generictokenbuf.read(buf,i);
                ppufile.putdata(buf,i);
                dec(sizeleft,i);
              end;
            ppufile.do_interface_crc:=oldintfcrc;
          end;
        if df_specialization in defoptions then
          ppufile.putderef(genericdefderef);
      end;


    procedure tstoreddef.buildderef;
      begin
        typesymderef.build(typesym);
        rttitablesymderef.build(rttitablesym);
        inittablesymderef.build(inittablesym);
        genericdefderef.build(genericdef);
      end;


    procedure tstoreddef.buildderefimpl;
      begin
      end;


    procedure tstoreddef.deref;
      begin
        typesym:=ttypesym(typesymderef.resolve);
        if df_has_rttitable in defoptions then
          rttitablesym:=trttisym(rttitablesymderef.resolve);
        if df_has_inittable in defoptions then
          inittablesym:=trttisym(inittablesymderef.resolve);
        if df_specialization in defoptions then
          genericdef:=tstoreddef(genericdefderef.resolve);
      end;


    procedure tstoreddef.derefimpl;
      begin
      end;


    function tstoreddef.size : aint;
      begin
         size:=savesize;
      end;


    function tstoreddef.getvardef:longint;
      begin
        result:=varUndefined;
      end;


    function tstoreddef.alignment : shortint;
      begin
         { natural alignment by default }
         alignment:=size_2_align(savesize);
      end;


    procedure tstoreddef.write_rtti_name;
      var
         str : string;
      begin
         { name }
         if assigned(typesym) then
           begin
              str:=ttypesym(typesym).realname;
              current_asmdata.asmlists[al_rtti].concat(Tai_string.Create(chr(length(str))+str));
           end
         else
           current_asmdata.asmlists[al_rtti].concat(Tai_string.Create(#0))
      end;


    procedure tstoreddef.write_rtti_data(rt:trttitype);
      begin
        current_asmdata.asmlists[al_rtti].concat(tai_const.create_8bit(tkUnknown));
        write_rtti_name;
      end;


    procedure tstoreddef.write_child_rtti_data(rt:trttitype);
      begin
      end;


    function tstoreddef.get_rtti_label(rt:trttitype) : tasmsymbol;
      begin
         { try to reuse persistent rtti data }
         if (rt=fullrtti) and (df_has_rttitable in defoptions) then
          get_rtti_label:=trttisym(rttitablesym).get_label
         else
          if (rt=initrtti) and (df_has_inittable in defoptions) then
           get_rtti_label:=trttisym(inittablesym).get_label
         else
          begin
            if not assigned(localrttilab[rt]) then
             begin
               current_asmdata.getdatalabel(localrttilab[rt]);
               write_child_rtti_data(rt);
               maybe_new_object_file(current_asmdata.asmlists[al_rtti]);
               new_section(current_asmdata.asmlists[al_rtti],sec_rodata,localrttilab[rt].name,const_align(sizeof(aint)));
               current_asmdata.asmlists[al_rtti].concat(Tai_symbol.Create_global(localrttilab[rt],0));
               write_rtti_data(rt);
               current_asmdata.asmlists[al_rtti].concat(Tai_symbol_end.Create(localrttilab[rt]));
             end;
            get_rtti_label:=localrttilab[rt];
          end;
      end;


    { returns true, if the definition can be published }
    function tstoreddef.is_publishable : boolean;
      begin
         is_publishable:=false;
      end;


    { needs an init table }
    function tstoreddef.needs_inittable : boolean;
      begin
         needs_inittable:=false;
      end;


   function tstoreddef.is_intregable : boolean;
     var
       recsize,temp: longint;
     begin
        is_intregable:=false;
        case deftype of
          orddef,
          pointerdef,
          enumdef,
          classrefdef:
            is_intregable:=true;
          procvardef :
            is_intregable:=not(po_methodpointer in tprocvardef(self).procoptions);
          objectdef:
            is_intregable:=is_class(self) or is_interface(self);
          setdef:
            is_intregable:=(tsetdef(self).settype=smallset);
          recorddef:
            begin
              recsize:=size;
              is_intregable:=
                ispowerof2(recsize,temp) and
                (recsize <= sizeof(aint));
            end;
        end;
     end;


   function tstoreddef.is_fpuregable : boolean;
     begin
{$ifdef x86}
       result:=use_sse(self);
{$else x86}
       result:=(deftype=floatdef) and not(cs_fp_emulation in current_settings.moduleswitches);
{$endif x86}
     end;


   procedure tstoreddef.initgeneric;
     begin
       if assigned(generictokenbuf) then
         internalerror(200512131);
       generictokenbuf:=tdynamicarray.create(256);
     end;


{****************************************************************************
                               Tstringdef
****************************************************************************}

    constructor tstringdef.createshort(l : byte);
      begin
         inherited create(stringdef);
         string_typ:=st_shortstring;
         len:=l;
         savesize:=len+1;
      end;


    constructor tstringdef.loadshort(ppufile:tcompilerppufile);
      begin
         inherited ppuload(stringdef,ppufile);
         string_typ:=st_shortstring;
         len:=ppufile.getbyte;
         savesize:=len+1;
      end;


    constructor tstringdef.createlong(l : aint);
      begin
         inherited create(stringdef);
         string_typ:=st_longstring;
         len:=l;
         savesize:=sizeof(aint);
      end;


    constructor tstringdef.loadlong(ppufile:tcompilerppufile);
      begin
         inherited ppuload(stringdef,ppufile);
         string_typ:=st_longstring;
         len:=ppufile.getaint;
         savesize:=sizeof(aint);
      end;


    constructor tstringdef.createansi(l:aint);
      begin
         inherited create(stringdef);
         string_typ:=st_ansistring;
         len:=l;
         savesize:=sizeof(aint);
      end;


    constructor tstringdef.loadansi(ppufile:tcompilerppufile);
      begin
         inherited ppuload(stringdef,ppufile);
         string_typ:=st_ansistring;
         len:=ppufile.getaint;
         savesize:=sizeof(aint);
      end;


    constructor tstringdef.createwide(l : aint);
      begin
         inherited create(stringdef);
         string_typ:=st_widestring;
         len:=l;
         savesize:=sizeof(aint);
      end;


    constructor tstringdef.loadwide(ppufile:tcompilerppufile);
      begin
         inherited ppuload(stringdef,ppufile);
         string_typ:=st_widestring;
         len:=ppufile.getaint;
         savesize:=sizeof(aint);
      end;


    function tstringdef.getcopy : tstoreddef;
      begin
        result:=tstringdef.create(deftype);
        result.deftype:=stringdef;
        tstringdef(result).string_typ:=string_typ;
        tstringdef(result).len:=len;
        tstringdef(result).savesize:=savesize;
      end;


    function tstringdef.stringtypname:string;
      const
        typname:array[tstringtype] of string[8]=(
          'shortstr','longstr','ansistr','widestr'
        );
      begin
        stringtypname:=typname[string_typ];
      end;


    procedure tstringdef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         if string_typ=st_shortstring then
           begin
{$ifdef extdebug}
            if len > 255 then internalerror(12122002);
{$endif}
            ppufile.putbyte(byte(len))
           end
         else
           ppufile.putaint(len);
         case string_typ of
            st_shortstring : ppufile.writeentry(ibshortstringdef);
            st_longstring : ppufile.writeentry(iblongstringdef);
            st_ansistring : ppufile.writeentry(ibansistringdef);
            st_widestring : ppufile.writeentry(ibwidestringdef);
         end;
      end;


    function tstringdef.needs_inittable : boolean;
      begin
         needs_inittable:=string_typ in [st_ansistring,st_widestring];
      end;


    function tstringdef.GetTypeName : string;
      const
         names : array[tstringtype] of string[11] = (
           'ShortString','LongString','AnsiString','WideString');
      begin
         GetTypeName:=names[string_typ];
      end;


    function tstringdef.alignment : shortint;
      begin
        case string_typ of
          st_widestring,
          st_ansistring:
            alignment:=size_2_align(savesize);
          st_longstring,
          st_shortstring:
{$ifdef cpurequiresproperalignment}
            { char to string accesses byte 0 and 1 with one word access }
            alignment:=size_2_align(2);
{$else cpurequiresproperalignment}
            alignment:=size_2_align(1);
{$endif cpurequiresproperalignment}
          else
            internalerror(200412301);
        end;
      end;


    procedure tstringdef.write_rtti_data(rt:trttitype);
      begin
         case string_typ of
            st_ansistring:
              begin
                 current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkAString));
                 write_rtti_name;
              end;
            st_widestring:
              begin
                 current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkWString));
                 write_rtti_name;
              end;
            st_longstring:
              begin
                 current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkLString));
                 write_rtti_name;
              end;
            st_shortstring:
              begin
                 current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkSString));
                 write_rtti_name;
                 current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(len));
{$ifdef cpurequiresproperalignment}
                 current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
              end;
         end;
      end;


    function tstringdef.getmangledparaname : string;
      begin
        getmangledparaname:='STRING';
      end;


    function tstringdef.is_publishable : boolean;
      begin
         is_publishable:=true;
      end;


{****************************************************************************
                                 TENUMDEF
****************************************************************************}

    constructor tenumdef.create;
      begin
         inherited create(enumdef);
         minval:=0;
         maxval:=0;
         calcsavesize;
         has_jumps:=false;
         basedef:=nil;
         firstenum:=nil;
      end;


    constructor tenumdef.create_subrange(_basedef:tenumdef;_min,_max:aint);
      begin
         inherited create(enumdef);
         minval:=_min;
         maxval:=_max;
         basedef:=_basedef;
         calcsavesize;
         has_jumps:=false;
         firstenum:=basedef.firstenum;
         while assigned(firstenum) and (tenumsym(firstenum).value<>minval) do
           firstenum:=tenumsym(firstenum).nextenum;
      end;


    constructor tenumdef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(enumdef,ppufile);
         ppufile.getderef(basedefderef);
         minval:=ppufile.getaint;
         maxval:=ppufile.getaint;
         savesize:=ppufile.getaint;
         has_jumps:=false;
         firstenum:=Nil;
      end;


    function tenumdef.getcopy : tstoreddef;
      begin
        if assigned(basedef) then
          result:=tenumdef.create_subrange(basedef,minval,maxval)
        else
          begin
            result:=tenumdef.create;
            tenumdef(result).minval:=minval;
            tenumdef(result).maxval:=maxval;
          end;
        tenumdef(result).has_jumps:=has_jumps;
        tenumdef(result).firstenum:=firstenum;
        tenumdef(result).basedefderef:=basedefderef;
      end;


    procedure tenumdef.calcsavesize;
      begin
        if (current_settings.packenum=8) or (min<low(longint)) or (int64(max)>high(cardinal)) then
         savesize:=8
        else
         if (current_settings.packenum=4) or (min<low(smallint)) or (max>high(word)) then
          savesize:=4
        else
         if (current_settings.packenum=2) or (min<low(shortint)) or (max>high(byte)) then
          savesize:=2
        else
         savesize:=1;
      end;


    function tenumdef.packedbitsize: aint;
      var
        power: longint;
      begin
        result := 0;
        if (minval < 0) then
          result := inherited packedbitsize
        else
          begin
            if (maxval <= 1) then
              result := 1
            else
              begin
                { 256 must become 512 etc. }
                nextpowerof2(maxval+1,power);
                result := power;
              end;
          end;
      end;


    procedure tenumdef.setmax(_max:aint);
      begin
        maxval:=_max;
        calcsavesize;
      end;


    procedure tenumdef.setmin(_min:aint);
      begin
        minval:=_min;
        calcsavesize;
      end;


    function tenumdef.min:aint;
      begin
        min:=minval;
      end;


    function tenumdef.max:aint;
      begin
        max:=maxval;
      end;


    procedure tenumdef.buildderef;
      begin
        inherited buildderef;
        basedefderef.build(basedef);
      end;


    procedure tenumdef.deref;
      begin
        inherited deref;
        basedef:=tenumdef(basedefderef.resolve);
        { restart ordering }
        firstenum:=nil;
      end;


    procedure tenumdef.derefimpl;
      begin
        if assigned(basedef) and
           (firstenum=nil) then
          begin
            firstenum:=basedef.firstenum;
            while assigned(firstenum) and (tenumsym(firstenum).value<>minval) do
              firstenum:=tenumsym(firstenum).nextenum;
          end;
      end;


    destructor tenumdef.destroy;
      begin
        inherited destroy;
      end;


    procedure tenumdef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putderef(basedefderef);
         ppufile.putaint(min);
         ppufile.putaint(max);
         ppufile.putaint(savesize);
         ppufile.writeentry(ibenumdef);
      end;


    procedure tenumdef.write_child_rtti_data(rt:trttitype);
      begin
         if assigned(basedef) then
           basedef.get_rtti_label(rt);
      end;


    procedure tenumdef.write_rtti_data(rt:trttitype);
      var
         hp : tenumsym;
      begin
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkEnumeration));
         write_rtti_name;
{$ifdef cpurequiresproperalignment}
         current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
         case longint(savesize) of
            1:
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(otUByte));
            2:
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(otUWord));
            4:
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(otULong));
         end;
{$ifdef cpurequiresproperalignment}
         current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_32bit(min));
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_32bit(max));
         if assigned(basedef) then
           current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_sym(basedef.get_rtti_label(rt)))
         else
           current_asmdata.asmlists[al_rtti].concat(Tai_const.create_sym(nil));
         hp:=tenumsym(firstenum);
         while assigned(hp) do
           begin
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(length(hp.realname)));
              current_asmdata.asmlists[al_rtti].concat(Tai_string.Create(hp.realname));
              hp:=hp.nextenum;
           end;
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(0));
      end;


    function tenumdef.is_publishable : boolean;
      begin
         is_publishable:=true;
      end;

    function tenumdef.GetTypeName : string;

      begin
         GetTypeName:='<enumeration type>';
      end;

{****************************************************************************
                                 TORDDEF
****************************************************************************}

    constructor torddef.create(t : tbasetype;v,b : TConstExprInt);
      begin
         inherited create(orddef);
         low:=v;
         high:=b;
         typ:=t;
         setsize;
      end;


    constructor torddef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(orddef,ppufile);
         typ:=tbasetype(ppufile.getbyte);
         if sizeof(TConstExprInt)=8 then
           begin
             low:=ppufile.getint64;
             high:=ppufile.getint64;
           end
         else
           begin
             low:=ppufile.getlongint;
             high:=ppufile.getlongint;
           end;
         setsize;
      end;


    function torddef.getcopy : tstoreddef;
      begin
         result:=torddef.create(typ,low,high);
         result.deftype:=orddef;
         torddef(result).low:=low;
         torddef(result).high:=high;
         torddef(result).typ:=typ;
         torddef(result).savesize:=savesize;
      end;


    function torddef.alignment:shortint;
      begin
        if (target_info.system = system_i386_darwin) and
           (typ in [s64bit,u64bit]) then
          result := 4
        else
          result := inherited alignment;
      end;


    procedure torddef.setsize;
      const
        sizetbl : array[tbasetype] of longint = (
          0,
          1,2,4,8,
          1,2,4,8,
          1,2,4,8,
          1,2,8
        );
      begin
        savesize:=sizetbl[typ];
      end;


    function torddef.packedbitsize: aint;
      var
        power: longint;
      begin
        result := 0;
        if typ = uvoid then
          exit;
        if (low < 0) then
          result := inherited packedbitsize
        else
          begin
            if (high <= 1) then
              result := 1
            else if (typ = u64bit) then
              result := 64
            else
              begin
                { 256 must become 512 etc. }
                nextpowerof2(high+1,power);
                result := power;
              end;
          end;
      end;


    function torddef.getvardef : longint;
      const
        basetype2vardef : array[tbasetype] of longint = (
          varUndefined,
          varbyte,varqword,varlongword,varqword,
          varshortint,varsmallint,varinteger,varint64,
          varboolean,varUndefined,varUndefined,varUndefined,
          varUndefined,varUndefined,varCurrency);
      begin
        result:=basetype2vardef[typ];
      end;


    procedure torddef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putbyte(byte(typ));
         if sizeof(TConstExprInt)=8 then
          begin
            ppufile.putint64(low);
            ppufile.putint64(high);
          end
         else
          begin
            ppufile.putlongint(low);
            ppufile.putlongint(high);
          end;
         ppufile.writeentry(iborddef);
      end;


    procedure torddef.write_rtti_data(rt:trttitype);

        procedure dointeger;
        const
          trans : array[tbasetype] of byte =
            (otUByte{otNone},
             otUByte,otUWord,otULong,otUByte{otNone},
             otSByte,otSWord,otSLong,otUByte{otNone},
             otUByte,otUWord,otULong,otUByte,
             otUByte,otUWord,otUByte);
        begin
          write_rtti_name;
{$ifdef cpurequiresproperalignment}
          current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
          current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(byte(trans[typ])));
{$ifdef cpurequiresproperalignment}
         current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
          current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_32bit(longint(low)));
          current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_32bit(longint(high)));
        end;

      begin
        case typ of
          s64bit :
            begin
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkInt64));
              write_rtti_name;
{$ifdef cpurequiresproperalignment}
              current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
              { low }
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_64bit(int64($80000000) shl 32));
              { high }
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_64bit((int64($7fffffff) shl 32) or int64($ffffffff)));
            end;
          u64bit :
            begin
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkQWord));
              write_rtti_name;
{$ifdef cpurequiresproperalignment}
              current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
              { low }
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_64bit(0));
              { high }
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_64bit(int64((int64($ffffffff) shl 32) or int64($ffffffff))));
            end;
          bool8bit:
            begin
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkBool));
              dointeger;
            end;
          uchar:
            begin
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkChar));
              dointeger;
            end;
          uwidechar:
            begin
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkWChar));
              dointeger;
            end;
          else
            begin
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkInteger));
              dointeger;
            end;
        end;
      end;


    function torddef.is_publishable : boolean;
      begin
         is_publishable:=(typ<>uvoid);
      end;


    function torddef.GetTypeName : string;

      const
        names : array[tbasetype] of string[20] = (
          'untyped',
          'Byte','Word','DWord','QWord',
          'ShortInt','SmallInt','LongInt','Int64',
          'Boolean','WordBool','LongBool','QWordBool',
          'Char','WideChar','Currency');

      begin
         GetTypeName:=names[typ];
      end;

{****************************************************************************
                                TFLOATDEF
****************************************************************************}

    constructor tfloatdef.create(t : tfloattype);
      begin
         inherited create(floatdef);
         typ:=t;
         setsize;
      end;


    constructor tfloatdef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(floatdef,ppufile);
         typ:=tfloattype(ppufile.getbyte);
         setsize;
      end;


    function tfloatdef.getcopy : tstoreddef;
      begin
         result:=tfloatdef.create(typ);
         result.deftype:=floatdef;
         tfloatdef(result).savesize:=savesize;
      end;


    function tfloatdef.alignment:shortint;
      begin
        if (target_info.system = system_i386_darwin) then
          case typ of
            s80real : result:=16;
            s64real,
            s64currency,
            s64comp : result:=4;
            else
              result := inherited alignment;
          end
        else
          result := inherited alignment;
      end;


    procedure tfloatdef.setsize;
      begin
         case typ of
           s32real : savesize:=4;
           s80real : savesize:=10;
           s64real,
           s64currency,
           s64comp : savesize:=8;
         else
           savesize:=0;
         end;
      end;


    function tfloatdef.getvardef : longint;
      const
        floattype2vardef : array[tfloattype] of longint = (
          varSingle,varDouble,varUndefined,
          varUndefined,varCurrency,varUndefined);
      begin
        if (upper(typename)='TDATETIME') and
          assigned(owner) and
          assigned(owner.name) and
          (owner.name^='SYSTEM') then
          result:=varDate
        else
          result:=floattype2vardef[typ];
      end;


    procedure tfloatdef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putbyte(byte(typ));
         ppufile.writeentry(ibfloatdef);
      end;


    procedure tfloatdef.write_rtti_data(rt:trttitype);
      const
         {tfloattype = (s32real,s64real,s80real,s64bit,s128bit);}
         translate : array[tfloattype] of byte =
           (ftSingle,ftDouble,ftExtended,ftComp,ftCurr,ftFloat128);
      begin
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkFloat));
         write_rtti_name;
{$ifdef cpurequiresproperalignment}
         current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(translate[typ]));
      end;


    function tfloatdef.is_publishable : boolean;
      begin
         is_publishable:=true;
      end;

    function tfloatdef.GetTypeName : string;

      const
        names : array[tfloattype] of string[20] = (
          'Single','Double','Extended','Comp','Currency','Float128');

      begin
         GetTypeName:=names[typ];
      end;

{****************************************************************************
                                TFILEDEF
****************************************************************************}

    constructor tfiledef.createtext;
      begin
         inherited create(filedef);
         filetyp:=ft_text;
         typedfiledef:=nil;
         setsize;
      end;


    constructor tfiledef.createuntyped;
      begin
         inherited create(filedef);
         filetyp:=ft_untyped;
         typedfiledef:=nil;
         setsize;
      end;


    constructor tfiledef.createtyped(def:tdef);
      begin
         inherited create(filedef);
         filetyp:=ft_typed;
         typedfiledef:=def;
         setsize;
      end;


    constructor tfiledef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(filedef,ppufile);
         filetyp:=tfiletyp(ppufile.getbyte);
         if filetyp=ft_typed then
           ppufile.getderef(typedfiledefderef)
         else
           typedfiledef:=nil;
         setsize;
      end;


    function tfiledef.getcopy : tstoreddef;
      begin
        case filetyp of
          ft_typed:
            result:=tfiledef.createtyped(typedfiledef);
          ft_untyped:
            result:=tfiledef.createuntyped;
          ft_text:
            result:=tfiledef.createtext;
          else
            internalerror(2004121201);
        end;
      end;


    procedure tfiledef.buildderef;
      begin
        inherited buildderef;
        if filetyp=ft_typed then
          typedfiledefderef.build(typedfiledef);
      end;


    procedure tfiledef.deref;
      begin
        inherited deref;
        if filetyp=ft_typed then
          typedfiledef:=tdef(typedfiledefderef.resolve);
      end;


    procedure tfiledef.setsize;
      begin
{$ifdef cpu64bit}
        case filetyp of
          ft_text :
            if target_info.system in [system_x86_64_win64,system_ia64_win64] then
              savesize:=632
            else
              savesize:=628;
          ft_typed,
          ft_untyped :
            if target_info.system in [system_x86_64_win64,system_ia64_win64] then
              savesize:=372
            else
              savesize:=368;
        end;
{$else cpu64bit}
        case filetyp of
          ft_text :
            savesize:=592;
          ft_typed,
          ft_untyped :
            savesize:=332;
        end;
{$endif cpu64bit}
      end;


    procedure tfiledef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putbyte(byte(filetyp));
         if filetyp=ft_typed then
           ppufile.putderef(typedfiledefderef);
         ppufile.writeentry(ibfiledef);
      end;


    function tfiledef.GetTypeName : string;
      begin
         case filetyp of
           ft_untyped:
             GetTypeName:='File';
           ft_typed:
             GetTypeName:='File Of '+typedfiledef.typename;
           ft_text:
             GetTypeName:='Text'
         end;
      end;


    function tfiledef.getmangledparaname : string;
      begin
         case filetyp of
           ft_untyped:
             getmangledparaname:='FILE';
           ft_typed:
             getmangledparaname:='FILE$OF$'+typedfiledef.mangledparaname;
           ft_text:
             getmangledparaname:='TEXT'
         end;
      end;


{****************************************************************************
                               TVARIANTDEF
****************************************************************************}

    constructor tvariantdef.create(v : tvarianttype);
      begin
         inherited create(variantdef);
         varianttype:=v;
         setsize;
      end;


    constructor tvariantdef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(variantdef,ppufile);
         varianttype:=tvarianttype(ppufile.getbyte);
         setsize;
      end;


    function tvariantdef.getcopy : tstoreddef;
      begin
        result:=tvariantdef.create(varianttype);
      end;


    procedure tvariantdef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putbyte(byte(varianttype));
         ppufile.writeentry(ibvariantdef);
      end;


    procedure tvariantdef.setsize;
      begin
{$ifdef cpu64bit}
        savesize:=24;
{$else cpu64bit}
        savesize:=16;
{$endif cpu64bit}
      end;


    function tvariantdef.GetTypeName : string;
      begin
         case varianttype of
           vt_normalvariant:
             GetTypeName:='Variant';
           vt_olevariant:
             GetTypeName:='OleVariant';
         end;
      end;


    procedure tvariantdef.write_rtti_data(rt:trttitype);
      begin
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkVariant));
      end;


    function tvariantdef.needs_inittable : boolean;
      begin
         needs_inittable:=true;
      end;


    function tvariantdef.is_publishable : boolean;
      begin
         is_publishable:=true;
      end;


{****************************************************************************
                            TABSTRACtpointerdef
****************************************************************************}

    constructor tabstractpointerdef.create(dt:tdeftype;def:tdef);
      begin
        inherited create(dt);
        pointeddef:=def;
        savesize:=sizeof(aint);
      end;


    constructor tabstractpointerdef.ppuload(dt:tdeftype;ppufile:tcompilerppufile);
      begin
         inherited ppuload(dt,ppufile);
         ppufile.getderef(pointeddefderef);
         savesize:=sizeof(aint);
      end;


    procedure tabstractpointerdef.buildderef;
      begin
        inherited buildderef;
        pointeddefderef.build(pointeddef);
      end;


    procedure tabstractpointerdef.deref;
      begin
        inherited deref;
        pointeddef:=tdef(pointeddefderef.resolve);
      end;


    procedure tabstractpointerdef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putderef(pointeddefderef);
      end;


{****************************************************************************
                               tpointerdef
****************************************************************************}

    constructor tpointerdef.create(def:tdef);
      begin
        inherited create(pointerdef,def);
        is_far:=false;
      end;


    constructor tpointerdef.createfar(def:tdef);
      begin
        inherited create(pointerdef,def);
        is_far:=true;
      end;


    constructor tpointerdef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(pointerdef,ppufile);
         is_far:=(ppufile.getbyte<>0);
      end;


    function tpointerdef.getcopy : tstoreddef;
      begin
        result:=tpointerdef.create(pointeddef);
        tpointerdef(result).is_far:=is_far;
        tpointerdef(result).savesize:=savesize;
      end;


    procedure tpointerdef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putbyte(byte(is_far));
         ppufile.writeentry(ibpointerdef);
      end;


    function tpointerdef.GetTypeName : string;
      begin
         if is_far then
          GetTypeName:='^'+pointeddef.typename+';far'
         else
          GetTypeName:='^'+pointeddef.typename;
      end;


{****************************************************************************
                              TCLASSREFDEF
****************************************************************************}

    constructor tclassrefdef.create(def:tdef);
      begin
         inherited create(classrefdef,def);
      end;


    constructor tclassrefdef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(classrefdef,ppufile);
      end;


    procedure tclassrefdef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.writeentry(ibclassrefdef);
      end;


    function tclassrefdef.GetTypeName : string;
      begin
         GetTypeName:='Class Of '+pointeddef.typename;
      end;


    function tclassrefdef.is_publishable : boolean;
      begin
         result:=true;
      end;


{***************************************************************************
                                   TSETDEF
***************************************************************************}

    constructor tsetdef.create(def:tdef;high : aint);
      begin
         inherited create(setdef);
         elementdef:=def;
         // setbase:=low;
         setmax:=high;
         if high<32 then
           begin
             settype:=smallset;
             if current_settings.setalloc=0 then      { $PACKSET Fixed?}
               savesize:=Sizeof(longint)
             else                       {No, use $PACKSET VALUE for rounding}
               savesize:=current_settings.setalloc*((high+current_settings.setalloc*8-1) DIV (current_settings.setalloc*8));
           end
         else
          if high<256 then
            begin
              settype:=normset;
              if current_settings.setalloc=0 then      { $PACKSET Fixed?}
                savesize:=32
              else                       {No, use $PACKSET VALUE for rounding}
                savesize:=current_settings.setalloc*((high+current_settings.setalloc*8-1) DIV (current_settings.setalloc*8));
            end
          else
            savesize:=current_settings.setalloc*((high+current_settings.setalloc*8-1) DIV (current_settings.setalloc*8));
      end;


    constructor tsetdef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(setdef,ppufile);
         ppufile.getderef(elementdefderef);
         settype:=tsettype(ppufile.getbyte);
         case settype of
           normset : savesize:=32;
           varset : savesize:=ppufile.getlongint;
           smallset : savesize:=Sizeof(longint);
         end;
      end;


    destructor tsetdef.destroy;
      begin
        inherited destroy;
      end;


    function tsetdef.getcopy : tstoreddef;
      begin
        case settype of
          smallset:
            result:=tsetdef.create(elementdef,31);
          normset:
            result:=tsetdef.create(elementdef,255);
          else
            internalerror(2004121202);
        end;
      end;


    procedure tsetdef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putderef(elementdefderef);
         ppufile.putbyte(byte(settype));
         if settype=varset then
           ppufile.putlongint(savesize);
         if settype=normset then
           ppufile.putaint(savesize);
         ppufile.writeentry(ibsetdef);
      end;


    procedure tsetdef.buildderef;
      begin
        inherited buildderef;
        elementdefderef.build(elementdef);
      end;


    procedure tsetdef.deref;
      begin
        inherited deref;
        elementdef:=tdef(elementdefderef.resolve);
      end;


    procedure tsetdef.write_child_rtti_data(rt:trttitype);
      begin
        tstoreddef(elementdef).get_rtti_label(rt);
      end;


    procedure tsetdef.write_rtti_data(rt:trttitype);
      begin
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkSet));
         write_rtti_name;
{$ifdef cpurequiresproperalignment}
         current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(otULong));
{$ifdef cpurequiresproperalignment}
         current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_sym(tstoreddef(elementdef).get_rtti_label(rt)));
      end;


    function tsetdef.is_publishable : boolean;
      begin
         is_publishable:=(settype=smallset);
      end;


    function tsetdef.GetTypeName : string;
      begin
         if assigned(elementdef) then
          GetTypeName:='Set Of '+elementdef.typename
         else
          GetTypeName:='Empty Set';
      end;


{***************************************************************************
                                 TFORMALDEF
***************************************************************************}

    constructor tformaldef.create;
      begin
         inherited create(formaldef);
         savesize:=0;
      end;


    constructor tformaldef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(formaldef,ppufile);
         savesize:=0;
      end;


    procedure tformaldef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.writeentry(ibformaldef);
      end;


    function tformaldef.GetTypeName : string;
      begin
         GetTypeName:='<Formal type>';
      end;


{***************************************************************************
                           TARRAYDEF
***************************************************************************}

    constructor tarraydef.create(l,h : aint;def:tdef);
      begin
         inherited create(arraydef);
         lowrange:=l;
         highrange:=h;
         rangedef:=def;
         _elementdef:=nil;
         arrayoptions:=[];
      end;


    constructor tarraydef.create_from_pointer(def:tdef);
      begin
         self.create(0,$7fffffff,s32inttype);
         arrayoptions:=[ado_IsConvertedPointer];
         setelementdef(def);
      end;


    constructor tarraydef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(arraydef,ppufile);
         { the addresses are calculated later }
         ppufile.getderef(_elementdefderef);
         ppufile.getderef(rangedefderef);
         lowrange:=ppufile.getaint;
         highrange:=ppufile.getaint;
         ppufile.getsmallset(arrayoptions);
      end;


    function tarraydef.getcopy : tstoreddef;
      begin
        result:=tarraydef.create(lowrange,highrange,rangedef);
        tarraydef(result).arrayoptions:=arrayoptions;
        tarraydef(result)._elementdef:=_elementdef;
      end;


    procedure tarraydef.buildderef;
      begin
        inherited buildderef;
        _elementdefderef.build(_elementdef);
        rangedefderef.build(rangedef);
      end;


    procedure tarraydef.deref;
      begin
        inherited deref;
        _elementdef:=tdef(_elementdefderef.resolve);
        rangedef:=tdef(rangedefderef.resolve);
      end;


    procedure tarraydef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putderef(_elementdefderef);
         ppufile.putderef(rangedefderef);
         ppufile.putaint(lowrange);
         ppufile.putaint(highrange);
         ppufile.putsmallset(arrayoptions);
         ppufile.writeentry(ibarraydef);
      end;


    function tarraydef.elesize : aint;
      begin
        if (ado_IsBitPacked in arrayoptions) then
          internalerror(2006080101);
	if assigned(_elementdef) then
          result:=_elementdef.size
	else
	  result:=0;
      end;


    function tarraydef.elepackedbitsize : aint;
      begin
        if not(ado_IsBitPacked in arrayoptions) then
          internalerror(2006080102);
	if assigned(_elementdef) then
          result:=_elementdef.packedbitsize
	else
	  result:=0;
      end;


    function tarraydef.elecount : aint;
      var
        qhigh,qlow : qword;
      begin
        if ado_IsDynamicArray in arrayoptions then
          begin
            result:=0;
            exit;
          end;
        if (highrange>0) and (lowrange<0) then
          begin
            qhigh:=highrange;
            qlow:=qword(-lowrange);
            { prevent overflow, return -1 to indicate overflow }
            if qhigh+qlow>qword(high(aint)-1) then
              result:=-1
            else
              result:=qhigh+qlow+1;
          end
        else
          result:=int64(highrange)-lowrange+1;
      end;


    function tarraydef.size : aint;
      var
        cachedelecount,
        cachedelesize : aint;
      begin
        if ado_IsDynamicArray in arrayoptions then
          begin
            size:=sizeof(aint);
            exit;
          end;

        { Tarraydef.size may never be called for an open array! }
        if highrange<lowrange then
          internalerror(99080501);
        if not (ado_IsBitPacked in arrayoptions) then
          cachedelesize:=elesize
        else
          cachedelesize := elepackedbitsize;
        cachedelecount:=elecount;

        if (cachedelesize = 0) then
          begin
            size := 0;
            exit;
          end;

        if (cachedelecount = -1) then
          begin
            size := -1;
            exit;
          end;

        { prevent overflow, return -1 to indicate overflow }
        { also make sure we don't need 64/128 bit arithmetic to calculate offsets }
        if (cachedelecount > high(aint)) or
           ((high(aint) div cachedelesize) < cachedelecount) or
           { also lowrange*elesize must be < high(aint) to prevent overflow when
             accessing the array, see ncgmem (PFV) }
           ((high(aint) div cachedelesize) < abs(lowrange)) then
          begin
            result:=-1;
            exit;
          end;

        if (ado_IsBitPacked in arrayoptions) then
          size:=(cachedelesize * cachedelecount + 7) div 8
        else
          result:=cachedelesize*cachedelecount;
      end;


    procedure tarraydef.setelementdef(def:tdef);
      begin
        _elementdef:=def;
        if not(
               (ado_IsDynamicArray in arrayoptions) or
               (ado_IsConvertedPointer in arrayoptions) or
               (highrange<lowrange)
	      ) and
           (size=-1) then
          Message(sym_e_segment_too_large);
      end;


    function tarraydef.alignment : shortint;
      begin
         { alignment is the size of the elements }
         if (elementdef.deftype in [arraydef,recorddef]) or
           ((elementdef.deftype=objectdef) and
             is_object(elementdef)) then
           alignment:=elementdef.alignment
         else if not (ado_IsBitPacked in arrayoptions) then
           alignment:=size_2_align(elesize)
         else
           alignment:=packedbitsloadsize(elepackedbitsize);
      end;


    function tarraydef.needs_inittable : boolean;
      begin
         needs_inittable:=(ado_IsDynamicArray in arrayoptions) or elementdef.needs_inittable;
      end;


    procedure tarraydef.write_child_rtti_data(rt:trttitype);
      begin
        tstoreddef(elementdef).get_rtti_label(rt);
      end;


    procedure tarraydef.write_rtti_data(rt:trttitype);
      begin
         if ado_IsBitPacked in arrayoptions then
           begin
             current_asmdata.asmlists[al_rtti].concat(tai_const.create_8bit(tkUnknown));
             write_rtti_name;
             exit;
           end;
         if ado_IsDynamicArray in arrayoptions then
           current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkdynarray))
         else
           current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkarray));
         write_rtti_name;
{$ifdef cpurequiresproperalignment}
         current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
         { size of elements }
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_aint(elesize));
         if not(ado_IsDynamicArray in arrayoptions) then
           current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_aint(elecount));
         { element type }
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_sym(tstoreddef(elementdef).get_rtti_label(rt)));
         { variant type }
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_32bit(tstoreddef(elementdef).getvardef));
      end;


    function tarraydef.GetTypeName : string;
      begin
         if (ado_IsConstString in arrayoptions) then
           result:='Constant String'
         else if (ado_isarrayofconst in arrayoptions) or
                 (ado_isConstructor in arrayoptions) then
           begin
             if (ado_isvariant in arrayoptions) or ((highrange=-1) and (lowrange=0)) then
               GetTypeName:='Array Of Const'
             else
               GetTypeName:='Array Of '+elementdef.typename;
           end
         else if ((highrange=-1) and (lowrange=0)) or (ado_IsDynamicArray in arrayoptions) then
           GetTypeName:='Array Of '+elementdef.typename
         else
           begin
              result := '';
              if (ado_IsBitPacked in arrayoptions) then
                result:='Packed ';
              if rangedef.deftype=enumdef then
                result:=result+'Array['+rangedef.typename+'] Of '+elementdef.typename
              else
                result:=result+'Array['+tostr(lowrange)+'..'+
                  tostr(highrange)+'] Of '+elementdef.typename
           end;
      end;


    function tarraydef.getmangledparaname : string;
      begin
         if ado_isarrayofconst in arrayoptions then
          getmangledparaname:='array_of_const'
         else
          if ((highrange=-1) and (lowrange=0)) then
           getmangledparaname:='array_of_'+elementdef.mangledparaname
         else
          internalerror(200204176);
      end;


{***************************************************************************
                              tabstractrecorddef
***************************************************************************}

    function tabstractrecorddef.getsymtable(t:tgetsymtable):tsymtable;
      begin
         if t=gs_record then
         getsymtable:=symtable
        else
         getsymtable:=nil;
      end;


    procedure tabstractrecorddef.reset;
      begin
        inherited reset;
        tstoredsymtable(symtable).reset_all_defs;
      end;


    function tabstractrecorddef.is_packed:boolean;
      begin
        result:=tabstractrecordsymtable(symtable).is_packed;
      end;

    procedure tabstractrecorddef.count_field_rtti(sym : tnamedindexitem;arg:pointer);
      begin
         if (FRTTIType=fullrtti) or
            ((tsym(sym).typ=fieldvarsym) and
             tfieldvarsym(sym).vardef.needs_inittable) then
           inc(Count);
      end;


    procedure tabstractrecorddef.generate_field_rtti(sym:tnamedindexitem;arg:pointer);
      begin
         if (FRTTIType=fullrtti) or
            ((tsym(sym).typ=fieldvarsym) and
             tfieldvarsym(sym).vardef.needs_inittable) then
           tstoreddef(tfieldvarsym(sym).vardef).get_rtti_label(FRTTIType);
      end;


    procedure tabstractrecorddef.write_field_rtti(sym : tnamedindexitem;arg:pointer);
      begin
         if (FRTTIType=fullrtti) or
            ((tsym(sym).typ=fieldvarsym) and
             tfieldvarsym(sym).vardef.needs_inittable) then
          begin
            current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_sym(tstoreddef(tfieldvarsym(sym).vardef).get_rtti_label(FRTTIType)));
            current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_32bit(tfieldvarsym(sym).fieldoffset));
          end;
      end;


{***************************************************************************
                                  trecorddef
***************************************************************************}

    constructor trecorddef.create(p : tsymtable);
      begin
         inherited create(recorddef);
         symtable:=p;
         symtable.defowner:=self;
         isunion:=false;
      end;


    constructor trecorddef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(recorddef,ppufile);
         symtable:=trecordsymtable.create(0);
         trecordsymtable(symtable).datasize:=ppufile.getaint;
         trecordsymtable(symtable).fieldalignment:=shortint(ppufile.getbyte);
         trecordsymtable(symtable).recordalignment:=shortint(ppufile.getbyte);
         trecordsymtable(symtable).padalignment:=shortint(ppufile.getbyte);
         trecordsymtable(symtable).usefieldalignment:=shortint(ppufile.getbyte);
         trecordsymtable(symtable).ppuload(ppufile);
         symtable.defowner:=self;
         isunion:=false;
      end;


    destructor trecorddef.destroy;
      begin
         if assigned(symtable) then
           symtable.free;
         inherited destroy;
      end;


    function trecorddef.getcopy : tstoreddef;
      begin
        result:=trecorddef.create(symtable.getcopy);
        trecorddef(result).isunion:=isunion;
      end;


    function trecorddef.needs_inittable : boolean;
      begin
        needs_inittable:=trecordsymtable(symtable).needs_init_final
      end;


    procedure trecorddef.buildderef;
      var
         oldrecsyms : tsymtable;
      begin
         inherited buildderef;
         oldrecsyms:=aktrecordsymtable;
         aktrecordsymtable:=symtable;
         { now build the definitions }
         tstoredsymtable(symtable).buildderef;
         aktrecordsymtable:=oldrecsyms;
      end;


    procedure trecorddef.deref;
      var
         oldrecsyms : tsymtable;
      begin
         inherited deref;
         oldrecsyms:=aktrecordsymtable;
         aktrecordsymtable:=symtable;
         { now dereference the definitions }
         tstoredsymtable(symtable).deref;
         aktrecordsymtable:=oldrecsyms;
         { assign TGUID? load only from system unit }
         if not(assigned(rec_tguid)) and
            (upper(typename)='TGUID') and
            assigned(owner) and
            assigned(owner.name) and
            (owner.name^='SYSTEM') then
           rec_tguid:=self;
      end;


    procedure trecorddef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.putaint(trecordsymtable(symtable).datasize);
         ppufile.putbyte(byte(trecordsymtable(symtable).fieldalignment));
         ppufile.putbyte(byte(trecordsymtable(symtable).recordalignment));
         ppufile.putbyte(byte(trecordsymtable(symtable).padalignment));
         ppufile.putbyte(byte(trecordsymtable(symtable).usefieldalignment));
         ppufile.writeentry(ibrecorddef);
         trecordsymtable(symtable).ppuwrite(ppufile);
      end;


    function trecorddef.size:aint;
      begin
        result:=trecordsymtable(symtable).datasize;
      end;


    function trecorddef.alignment:shortint;
      begin
        alignment:=trecordsymtable(symtable).recordalignment;
      end;


    function trecorddef.padalignment:shortint;
      begin
        padalignment := trecordsymtable(symtable).padalignment;
      end;


    procedure trecorddef.write_child_rtti_data(rt:trttitype);
      begin
         FRTTIType:=rt;
         symtable.foreach(@generate_field_rtti,nil);
      end;


    procedure trecorddef.write_rtti_data(rt:trttitype);
      begin
         if is_packed then
           begin
             current_asmdata.asmlists[al_rtti].concat(tai_const.create_8bit(tkUnknown));
             write_rtti_name;
             exit;
           end;
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkrecord));
         write_rtti_name;
{$ifdef cpurequiresproperalignment}
         current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_32bit(size));
         Count:=0;
         FRTTIType:=rt;
         symtable.foreach(@count_field_rtti,nil);
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_32bit(Count));
         symtable.foreach(@write_field_rtti,nil);
      end;


    function trecorddef.GetTypeName : string;
      begin
         GetTypeName:='<record type>'
      end;


{***************************************************************************
                       TABSTRACTPROCDEF
***************************************************************************}

    constructor tabstractprocdef.create(dt:tdeftype;level:byte);
      begin
         inherited create(dt);
         parast:=tparasymtable.create(level);
         parast.defowner:=self;
         paras:=nil;
         minparacount:=0;
         maxparacount:=0;
         proctypeoption:=potype_none;
         proccalloption:=pocall_none;
         procoptions:=[];
         returndef:=voidtype;
{$ifdef i386}
         fpu_used:=0;
{$endif i386}
         savesize:=sizeof(aint);
         requiredargarea:=0;
         has_paraloc_info:=false;

         location_reset(funcretloc[callerside],LOC_INVALID,OS_NO);
         location_reset(funcretloc[calleeside],LOC_INVALID,OS_NO);
      end;


    destructor tabstractprocdef.destroy;
      begin
         if assigned(paras) then
           begin
{$ifdef MEMDEBUG}
             memprocpara.start;
{$endif MEMDEBUG}
             paras.free;
{$ifdef MEMDEBUG}
             memprocpara.stop;
{$endif MEMDEBUG}
          end;
         if assigned(parast) then
          begin
{$ifdef MEMDEBUG}
            memprocparast.start;
{$endif MEMDEBUG}
            parast.free;
{$ifdef MEMDEBUG}
            memprocparast.stop;
{$endif MEMDEBUG}
          end;
         inherited destroy;
      end;


    procedure tabstractprocdef.releasemem;
      begin
        if assigned(paras) then
          begin
            paras.free;
            paras:=nil;
          end;
        parast.free;
        parast:=nil;
      end;


    procedure tabstractprocdef.count_para(p:tnamedindexitem;arg:pointer);
      begin
        if (tsym(p).typ<>paravarsym) then
          exit;
        inc(plongint(arg)^);
        if not(vo_is_hidden_para in tparavarsym(p).varoptions) then
         begin
           if not assigned(tparavarsym(p).defaultconstsym) then
             inc(minparacount);
           inc(maxparacount);
         end;
      end;


    procedure tabstractprocdef.insert_para(p:tnamedindexitem;arg:pointer);
      begin
        if (tsym(p).typ<>paravarsym) then
          exit;
        paras.add(p);
      end;


    procedure tabstractprocdef.calcparas;
      var
        paracount : longint;
      begin
        { This can already be assigned when
          we need to reresolve this unit (PFV) }
        if assigned(paras) then
          paras.free;
        paras:=tparalist.create(false);
        paracount:=0;
        minparacount:=0;
        maxparacount:=0;
        parast.foreach(@count_para,@paracount);
        paras.capacity:=paracount;
        { Insert parameters in table }
        parast.foreach(@insert_para,nil);
        { Order parameters }
        paras.sortparas;
      end;


    { all functions returning in FPU are
      assume to use 2 FPU registers
      until the function implementation
      is processed   PM }
    procedure tabstractprocdef.test_if_fpu_result;
      begin
{$ifdef i386}
         if assigned(returndef) and
            (returndef.deftype=floatdef) then
           fpu_used:=maxfpuregs;
{$endif i386}
      end;


    procedure tabstractprocdef.buildderef;
      begin
         { released procdef? }
         if not assigned(parast) then
           exit;
         inherited buildderef;
         returndefderef.build(returndef);
         { parast }
         tparasymtable(parast).buildderef;
      end;


    procedure tabstractprocdef.deref;
      begin
         inherited deref;
         returndef:=tdef(returndefderef.resolve);
         { parast }
         tparasymtable(parast).deref;
         { recalculated parameters }
         calcparas;
      end;


    constructor tabstractprocdef.ppuload(dt:tdeftype;ppufile:tcompilerppufile);
      var
        b : byte;
      begin
         inherited ppuload(dt,ppufile);
         parast:=nil;
         Paras:=nil;
         minparacount:=0;
         maxparacount:=0;
         ppufile.getderef(returndefderef);
{$ifdef i386}
         fpu_used:=ppufile.getbyte;
{$else}
         ppufile.getbyte;
{$endif i386}
         proctypeoption:=tproctypeoption(ppufile.getbyte);
         proccalloption:=tproccalloption(ppufile.getbyte);
         ppufile.getnormalset(procoptions);

         location_reset(funcretloc[callerside],LOC_INVALID,OS_NO);
         location_reset(funcretloc[calleeside],LOC_INVALID,OS_NO);
         if po_explicitparaloc in procoptions then
           begin
             b:=ppufile.getbyte;
             if b<>sizeof(funcretloc[callerside]) then
               internalerror(200411154);
             ppufile.getdata(funcretloc[callerside],sizeof(funcretloc[callerside]));
           end;

         savesize:=sizeof(aint);
         has_paraloc_info:=(po_explicitparaloc in procoptions);
      end;


    procedure tabstractprocdef.ppuwrite(ppufile:tcompilerppufile);
      var
        oldintfcrc : boolean;
      begin
         { released procdef? }
         if not assigned(parast) then
           exit;
         inherited ppuwrite(ppufile);
         ppufile.putderef(returndefderef);
         oldintfcrc:=ppufile.do_interface_crc;
         ppufile.do_interface_crc:=false;
{$ifdef i386}
         if simplify_ppu then
          fpu_used:=0;
         ppufile.putbyte(fpu_used);
{$else}
         ppufile.putbyte(0);
{$endif}
         ppufile.putbyte(ord(proctypeoption));
         ppufile.putbyte(ord(proccalloption));
         ppufile.putnormalset(procoptions);
         ppufile.do_interface_crc:=oldintfcrc;

         if (po_explicitparaloc in procoptions) then
           begin
             { Make a 'valid' funcretloc for procedures }
             ppufile.putbyte(sizeof(funcretloc[callerside]));
             ppufile.putdata(funcretloc[callerside],sizeof(funcretloc[callerside]));
           end;
      end;


    function tabstractprocdef.typename_paras(showhidden:boolean) : string;
      var
        hs,s  : string;
        hp    : TParavarsym;
        hpc   : tconstsym;
        first : boolean;
        i     : integer;
      begin
        s:='';
        first:=true;
        for i:=0 to paras.count-1 do
         begin
           hp:=tparavarsym(paras[i]);
           if not(vo_is_hidden_para in hp.varoptions) or
              (showhidden) then
            begin
               if first then
                begin
                  s:=s+'(';
                  first:=false;
                end
               else
                s:=s+',';
               if vo_is_hidden_para in hp.varoptions then
                 s:=s+'<';
               case hp.varspez of
                 vs_var :
                   s:=s+'var';
                 vs_const :
                   s:=s+'const';
                 vs_out :
                   s:=s+'out';
               end;
               if assigned(hp.vardef.typesym) then
                 begin
                   if s<>'(' then
                    s:=s+' ';
                   hs:=hp.vardef.typesym.realname;
                   if hs[1]<>'$' then
                     s:=s+hp.vardef.typesym.realname
                   else
                     s:=s+hp.vardef.GetTypeName;
                 end
               else
                 s:=s+hp.vardef.GetTypeName;
               { default value }
               if assigned(hp.defaultconstsym) then
                begin
                  hpc:=tconstsym(hp.defaultconstsym);
                  hs:='';
                  case hpc.consttyp of
                    conststring,
                    constresourcestring :
                      hs:=strpas(pchar(hpc.value.valueptr));
                    constreal :
                      str(pbestreal(hpc.value.valueptr)^,hs);
                    constpointer :
                      hs:=tostr(hpc.value.valueordptr);
                    constord :
                      begin
                        if is_boolean(hpc.constdef) then
                          begin
                            if hpc.value.valueord<>0 then
                             hs:='TRUE'
                            else
                             hs:='FALSE';
                          end
                        else
                          hs:=tostr(hpc.value.valueord);
                      end;
                    constnil :
                      hs:='nil';
                    constset :
                      hs:='<set>';
                  end;
                  if hs<>'' then
                   s:=s+'="'+hs+'"';
                end;
               if vo_is_hidden_para in hp.varoptions then
                 s:=s+'>';
             end;
         end;
        if not first then
         s:=s+')';
        if (po_varargs in procoptions) then
         s:=s+';VarArgs';
        typename_paras:=s;
      end;


    function tabstractprocdef.is_methodpointer:boolean;
      begin
        result:=false;
      end;


    function tabstractprocdef.is_addressonly:boolean;
      begin
        result:=true;
      end;


{***************************************************************************
                                  TPROCDEF
***************************************************************************}

    constructor tprocdef.create(level:byte);
      begin
         inherited create(procdef,level);
         _mangledname:=nil;
         fileinfo:=current_filepos;
         extnumber:=$ffff;
         aliasnames:=tstringlist.create;
         funcretsym:=nil;
         localst := nil;
         defref:=nil;
         lastwritten:=nil;
         refcount:=0;
         if (cs_browser in current_settings.moduleswitches) and make_ref then
          begin
            defref:=tref.create(defref,@current_tokenpos);
            inc(refcount);
          end;
         lastref:=defref;
         forwarddef:=true;
         interfacedef:=false;
         hasforward:=false;
         _class := nil;
         import_dll:=nil;
         import_name:=nil;
         import_nr:=0;
         inlininginfo:=nil;
      end;


    constructor tprocdef.ppuload(ppufile:tcompilerppufile);
      var
        level : byte;
      begin
         inherited ppuload(procdef,ppufile);
         if po_has_mangledname in procoptions then
          _mangledname:=stringdup(ppufile.getstring)
         else
          _mangledname:=nil;
         extnumber:=ppufile.getword;
         level:=ppufile.getbyte;
         ppufile.getderef(_classderef);
         ppufile.getderef(procsymderef);
         ppufile.getposinfo(fileinfo);
         ppufile.getsmallset(symoptions);
{$ifdef powerpc}
         { library symbol for AmigaOS/MorphOS }
         ppufile.getderef(libsymderef);
{$endif powerpc}
         { import stuff }
         if po_has_importdll in procoptions then
           import_dll:=stringdup(ppufile.getstring)
         else
           import_dll:=nil;
         if po_has_importname in procoptions then
           import_name:=stringdup(ppufile.getstring)
         else
           import_name:=nil;
         import_nr:=ppufile.getword;
         if (po_msgint in procoptions) then
           messageinf.i:=ppufile.getlongint;
         if (po_msgstr in procoptions) then
           messageinf.str:=stringdup(ppufile.getstring);
         { inline stuff }
         if (po_has_inlininginfo in procoptions) then
           begin
             ppufile.getderef(funcretsymderef);
             new(inlininginfo);
             ppufile.getsmallset(inlininginfo^.flags);
           end
         else
           begin
             inlininginfo:=nil;
             funcretsym:=nil;
           end;
         { load para symtable }
         parast:=tparasymtable.create(level);
         tparasymtable(parast).ppuload(ppufile);
         parast.defowner:=self;
         { load local symtable }
         if (po_has_inlininginfo in procoptions) or
            ((current_module.flags and uf_local_browser)<>0) then
          begin
            localst:=tlocalsymtable.create(level);
            tlocalsymtable(localst).ppuload(ppufile);
            localst.defowner:=self;
          end
         else
          localst:=nil;
         { inline stuff }
         if (po_has_inlininginfo in procoptions) then
           inlininginfo^.code:=ppuloadnodetree(ppufile);
         { default values for no persistent data }
         if (cs_link_deffile in current_settings.globalswitches) and
            (tf_need_export in target_info.flags) and
            (po_exports in procoptions) then
           deffile.AddExport(mangledname);
         aliasnames:=tstringlist.create;
         forwarddef:=false;
         interfacedef:=false;
         hasforward:=false;
         lastref:=nil;
         lastwritten:=nil;
         defref:=nil;
         refcount:=0;
         { Disable po_has_inlining until the derefimpl is done }
         exclude(procoptions,po_has_inlininginfo);
      end;


    destructor tprocdef.destroy;
      begin
         if assigned(defref) then
           begin
             defref.freechain;
             defref.free;
           end;
         aliasnames.free;
         if assigned(localst) and (localst.symtabletype<>staticsymtable) then
          begin
{$ifdef MEMDEBUG}
            memproclocalst.start;
{$endif MEMDEBUG}
            localst.free;
{$ifdef MEMDEBUG}
            memproclocalst.start;
{$endif MEMDEBUG}
          end;
         if assigned(inlininginfo) then
          begin
{$ifdef MEMDEBUG}
            memprocnodetree.start;
{$endif MEMDEBUG}
            tnode(inlininginfo^.code).free;
{$ifdef MEMDEBUG}
            memprocnodetree.start;
{$endif MEMDEBUG}
            dispose(inlininginfo);
          end;
         stringdispose(import_dll);
         stringdispose(import_name);
         if (po_msgstr in procoptions) then
           stringdispose(messageinf.str);
         if assigned(_mangledname) then
          begin
{$ifdef MEMDEBUG}
            memmanglednames.start;
{$endif MEMDEBUG}
            stringdispose(_mangledname);
{$ifdef MEMDEBUG}
            memmanglednames.stop;
{$endif MEMDEBUG}
          end;
         inherited destroy;
      end;


    procedure tprocdef.ppuwrite(ppufile:tcompilerppufile);
      var
        oldintfcrc : boolean;
        oldparasymtable,
        oldlocalsymtable : tsymtable;
      begin
         { released procdef? }
         if not assigned(parast) then
           exit;

         oldparasymtable:=aktparasymtable;
         oldlocalsymtable:=aktlocalsymtable;
         aktparasymtable:=parast;
         aktlocalsymtable:=localst;

         inherited ppuwrite(ppufile);
         if po_has_mangledname in procoptions then
          ppufile.putstring(_mangledname^);
         ppufile.putword(extnumber);
         ppufile.putbyte(parast.symtablelevel);
         ppufile.putderef(_classderef);
         ppufile.putderef(procsymderef);
         ppufile.putposinfo(fileinfo);
         ppufile.putsmallset(symoptions);
{$ifdef powerpc}
         { library symbol for AmigaOS/MorphOS }
         ppufile.putderef(libsymderef);
{$endif powerpc}
         { import }
         if po_has_importdll in procoptions then
           ppufile.putstring(import_dll^);
         if po_has_importname in procoptions then
           ppufile.putstring(import_name^);
         ppufile.putword(import_nr);
         if (po_msgint in procoptions) then
           ppufile.putlongint(messageinf.i);
         if (po_msgstr in procoptions) then
           ppufile.putstring(messageinf.str^);
         { inline stuff }
         oldintfcrc:=ppufile.do_crc;
         ppufile.do_crc:=false;
         if (po_has_inlininginfo in procoptions) then
           begin
             ppufile.putderef(funcretsymderef);
             ppufile.putsmallset(inlininginfo^.flags);
           end;
         ppufile.do_crc:=oldintfcrc;

         { write this entry }
         ppufile.writeentry(ibprocdef);

         { Save the para symtable, this is taken from the interface }
         tparasymtable(parast).ppuwrite(ppufile);

         { save localsymtable for inline procedures or when local
           browser info is requested, this has no influence on the crc }
         if (po_has_inlininginfo in procoptions) or
            ((current_module.flags and uf_local_browser)<>0) then
          begin
            { we must write a localsymtable }
            if not assigned(localst) then
              insert_localst;
            oldintfcrc:=ppufile.do_crc;
            ppufile.do_crc:=false;
            tlocalsymtable(localst).ppuwrite(ppufile);
            ppufile.do_crc:=oldintfcrc;
          end;

         { node tree for inlining }
         oldintfcrc:=ppufile.do_crc;
         ppufile.do_crc:=false;
         if (po_has_inlininginfo in procoptions) then
           ppuwritenodetree(ppufile,inlininginfo^.code);
         ppufile.do_crc:=oldintfcrc;

         aktparasymtable:=oldparasymtable;
         aktlocalsymtable:=oldlocalsymtable;
      end;


    procedure tprocdef.reset;
      begin
        inherited reset;
        procstarttai:=nil;
        procendtai:=nil;
      end;


    procedure tprocdef.insert_localst;
      begin
         localst:=tlocalsymtable.create(parast.symtablelevel);
         localst.defowner:=self;
      end;


    function tprocdef.fullprocname(showhidden:boolean):string;
      var
        s : string;
        t : ttoken;
      begin
{$ifdef EXTDEBUG}
        showhidden:=true;
{$endif EXTDEBUG}
        s:='';
        if owner.symtabletype=localsymtable then
         s:=s+'local ';
        if assigned(_class) then
         begin
           if po_classmethod in procoptions then
            s:=s+'class ';
           s:=s+_class.objrealname^+'.';
         end;
        if proctypeoption=potype_operator then
          begin
            for t:=NOTOKEN to last_overloaded do
              if procsym.realname='$'+overloaded_names[t] then
                begin
                  s:='operator '+arraytokeninfo[t].str+typename_paras(showhidden);
                  break;
                end;
          end
        else
          s:=s+procsym.realname+typename_paras(showhidden);
        case proctypeoption of
          potype_constructor:
            s:='constructor '+s;
          potype_destructor:
            s:='destructor '+s;
          else
            if assigned(returndef) and
              not(is_void(returndef)) then
              s:=s+':'+returndef.GetTypeName;
        end;
        { forced calling convention? }
        if (po_hascallingconvention in procoptions) then
          s:=s+';'+ProcCallOptionStr[proccalloption];
        fullprocname:=s;
      end;


    function tprocdef.is_methodpointer:boolean;
      begin
        result:=assigned(_class);
      end;


    function tprocdef.is_addressonly:boolean;
      begin
        result:=assigned(owner) and
                (owner.symtabletype<>objectsymtable);
      end;


    function tprocdef.is_visible_for_object(currobjdef,contextobjdef:tobjectdef):boolean;
      var
        contextst : tsymtable;
      begin
        result:=false;

        { Support passing a context in which module we are to find protected members }
        if assigned(contextobjdef) then
          contextst:=contextobjdef.owner
        else
          contextst:=nil;

        { private symbols are allowed when we are in the same
          module as they are defined }
        if (sp_private in symoptions) and
           (owner.defowner.owner.symtabletype in [globalsymtable,staticsymtable]) and
           not(owner.defowner.owner.iscurrentunit or (owner.defowner.owner=contextst)) then
          exit;

        if (sp_strictprivate in symoptions) then
          begin
            result:=currobjdef=tobjectdef(owner.defowner);
            exit;
          end;

        if (sp_strictprotected in symoptions) then
          begin
             result:=assigned(currobjdef) and
               currobjdef.is_related(tobjectdef(owner.defowner));
             exit;
          end;

        { protected symbols are visible in the module that defines them and
          also visible to related objects. The related object must be defined
          in the current module }
        if (sp_protected in symoptions) and
           (
            (
             (owner.defowner.owner.symtabletype in [globalsymtable,staticsymtable]) and
             not((owner.defowner.owner.iscurrentunit) or (owner.defowner.owner=contextst))
            ) and
            not(
                assigned(currobjdef) and
                (currobjdef.owner.symtabletype in [globalsymtable,staticsymtable]) and
                (currobjdef.owner.iscurrentunit) and
                currobjdef.is_related(tobjectdef(owner.defowner))
               )
           ) then
          exit;

        result:=true;
      end;


    function tprocdef.getsymtable(t:tgetsymtable):tsymtable;
      begin
        case t of
          gs_local :
            getsymtable:=localst;
          gs_para :
            getsymtable:=parast;
          else
            getsymtable:=nil;
        end;
      end;


    procedure tprocdef.load_references(ppufile:tcompilerppufile;locals:boolean);
      var
        pos : tfileposinfo;
        move_last : boolean;
        oldparasymtable,
        oldlocalsymtable : tsymtable;
      begin
        oldparasymtable:=aktparasymtable;
        oldlocalsymtable:=aktlocalsymtable;
        aktparasymtable:=parast;
        aktlocalsymtable:=localst;

        move_last:=lastwritten=lastref;
        while (not ppufile.endofentry) do
         begin
           ppufile.getposinfo(pos);
           inc(refcount);
           lastref:=tref.create(lastref,@pos);
           lastref.is_written:=true;
           if refcount=1 then
            defref:=lastref;
         end;
        if move_last then
          lastwritten:=lastref;
        if ((current_module.flags and uf_local_browser)<>0) and
           assigned(localst) and
           locals then
          begin
             tparasymtable(parast).load_references(ppufile,locals);
             tlocalsymtable(localst).load_references(ppufile,locals);
          end;

        aktparasymtable:=oldparasymtable;
        aktlocalsymtable:=oldlocalsymtable;
      end;


    Const
      local_symtable_index : word = $8001;

    function tprocdef.write_references(ppufile:tcompilerppufile;locals:boolean):boolean;
      var
        ref : tref;
{$ifdef supportbrowser}
        pdo : tobjectdef;
{$endif supportbrowser}
        move_last : boolean;
        d : tderef;
        oldparasymtable,
        oldlocalsymtable : tsymtable;
      begin
        d.reset;
        move_last:=lastwritten=lastref;
        if move_last and
           (((current_module.flags and uf_local_browser)=0) or
            not locals) then
          exit;
        oldparasymtable:=aktparasymtable;
        oldlocalsymtable:=aktlocalsymtable;
        aktparasymtable:=parast;
        aktlocalsymtable:=localst;
        { write address of this symbol }
        d.build(self);
        ppufile.putderef(d);
        { write refs }
        if assigned(lastwritten) then
          ref:=lastwritten
        else
          ref:=defref;
        while assigned(ref) do
         begin
           if ref.moduleindex=current_module.unit_index then
             begin
                ppufile.putposinfo(ref.posinfo);
                ref.is_written:=true;
                if move_last then
                  lastwritten:=ref;
             end
           else if not ref.is_written then
             move_last:=false
           else if move_last then
             lastwritten:=ref;
           ref:=ref.nextref;
         end;
        ppufile.writeentry(ibdefref);
        write_references:=true;
{$ifdef supportbrowser}
        if ((current_module.flags and uf_local_browser)<>0) and
           assigned(localst) and
           locals then
          begin
             pdo:=_class;
             if (owner.symtabletype<>localsymtable) then
               while assigned(pdo) do
                 begin
                    if pdo.symtable<>aktrecordsymtable then
                      begin
                         pdo.symtable.moduleid:=local_symtable_index;
                         inc(local_symtable_index);
                      end;
                    pdo:=pdo.childof;
                 end;
             parast.moduleid:=local_symtable_index;
             inc(local_symtable_index);
             localst.moduleid:=local_symtable_index;
             inc(local_symtable_index);
             tstoredsymtable(parast).write_references(ppufile,locals);
             tstoredsymtable(localst).write_references(ppufile,locals);
             { decrement for }
             local_symtable_index:=local_symtable_index-2;
             pdo:=_class;
             if (owner.symtabletype<>localsymtable) then
               while assigned(pdo) do
                 begin
                    if pdo.symtable<>aktrecordsymtable then
                      dec(local_symtable_index);
                    pdo:=pdo.childof;
                 end;
          end;
{$endif supportbrowser}
        aktparasymtable:=oldparasymtable;
        aktlocalsymtable:=oldlocalsymtable;
      end;


    procedure tprocdef.buildderef;
      var
        oldparasymtable,
        oldlocalsymtable : tsymtable;
      begin
         oldparasymtable:=aktparasymtable;
         oldlocalsymtable:=aktlocalsymtable;
         aktparasymtable:=parast;
         aktlocalsymtable:=localst;

         inherited buildderef;
         _classderef.build(_class);
         { procsym that originaly defined this definition, should be in the
           same symtable }
         procsymderef.build(procsym);
{$ifdef powerpc}
         { library symbol for AmigaOS/MorphOS }
         libsymderef.build(libsym);
{$endif powerpc}

         aktparasymtable:=oldparasymtable;
         aktlocalsymtable:=oldlocalsymtable;
      end;


    procedure tprocdef.buildderefimpl;
      var
        oldparasymtable,
        oldlocalsymtable : tsymtable;
      begin
         { released procdef? }
         if not assigned(parast) then
           exit;

         oldparasymtable:=aktparasymtable;
         oldlocalsymtable:=aktlocalsymtable;
         aktparasymtable:=parast;
         aktlocalsymtable:=localst;

         inherited buildderefimpl;

         { Locals, always build deref info it might be needed
           if the unit needs to be reloaded }
         if assigned(localst) then
           begin
             tlocalsymtable(localst).buildderef;
             tlocalsymtable(localst).buildderefimpl;
           end;

         { inline tree }
         if (po_has_inlininginfo in procoptions) then
           begin
             funcretsymderef.build(funcretsym);
             inlininginfo^.code.buildderefimpl;
           end;

         aktparasymtable:=oldparasymtable;
         aktlocalsymtable:=oldlocalsymtable;
      end;


    procedure tprocdef.deref;
      var
        oldparasymtable,
        oldlocalsymtable : tsymtable;
      begin
         { released procdef? }
         if not assigned(parast) then
           exit;

         oldparasymtable:=aktparasymtable;
         oldlocalsymtable:=aktlocalsymtable;
         aktparasymtable:=parast;
         aktlocalsymtable:=localst;

         inherited deref;
         _class:=tobjectdef(_classderef.resolve);
         { procsym that originaly defined this definition, should be in the
           same symtable }
         procsym:=tprocsym(procsymderef.resolve);
{$ifdef powerpc}
         { library symbol for AmigaOS/MorphOS }
         libsym:=tsym(libsymderef.resolve);
{$endif powerpc}

         aktparasymtable:=oldparasymtable;
         aktlocalsymtable:=oldlocalsymtable;
      end;


    procedure tprocdef.derefimpl;
      var
        oldparasymtable,
        oldlocalsymtable : tsymtable;
      begin
         oldparasymtable:=aktparasymtable;
         oldlocalsymtable:=aktlocalsymtable;
         aktparasymtable:=parast;
         aktlocalsymtable:=localst;

         { Enable has_inlininginfo when the inlininginfo
           structure is available. The has_inlininginfo was disabled
           after the load, since the data was invalid }
         if assigned(inlininginfo) then
           include(procoptions,po_has_inlininginfo);

         { Locals }
         if assigned(localst) then
          begin
            tlocalsymtable(localst).deref;
            tlocalsymtable(localst).derefimpl;
          end;

        { Inline }
        if (po_has_inlininginfo in procoptions) then
          begin
            inlininginfo^.code.derefimpl;
            { funcretsym, this is always located in the localst }
            funcretsym:=tsym(funcretsymderef.resolve);
          end
        else
          begin
            { safety }
            funcretsym:=nil;
          end;

        aktparasymtable:=oldparasymtable;
        aktlocalsymtable:=oldlocalsymtable;
      end;


    function tprocdef.GetTypeName : string;
      begin
         GetTypeName := FullProcName(false);
      end;


    function tprocdef.mangledname : string;
      var
        hp   : TParavarsym;
        hs   : string;
        crc  : dword;
        newlen,
        oldlen,
        i    : integer;
      begin
        if assigned(_mangledname) then
         begin
         {$ifdef compress}
           mangledname:=minilzw_decode(_mangledname^);
         {$else}
           mangledname:=_mangledname^;
         {$endif}
           exit;
         end;
        { we need to use the symtable where the procsym is inserted,
          because that is visible to the world }
        mangledname:=make_mangledname('',procsym.owner,procsym.name);
        oldlen:=length(mangledname);
        { add parameter types }
        for i:=0 to paras.count-1 do
         begin
           hp:=tparavarsym(paras[i]);
           if not(vo_is_hidden_para in hp.varoptions) then
             mangledname:=mangledname+'$'+hp.vardef.mangledparaname;
         end;
        { add resultdef, add $$ as separator to make it unique from a
          parameter separator }
        if not is_void(returndef) then
          mangledname:=mangledname+'$$'+returndef.mangledparaname;
        newlen:=length(mangledname);
        { Replace with CRC if the parameter line is very long }
        if (newlen-oldlen>12) and
           ((newlen>128) or (newlen-oldlen>64)) then
          begin
            crc:=$ffffffff;
            for i:=0 to paras.count-1 do
              begin
                hp:=tparavarsym(paras[i]);
                if not(vo_is_hidden_para in hp.varoptions) then
                  begin
                    hs:=hp.vardef.mangledparaname;
                    crc:=UpdateCrc32(crc,hs[1],length(hs));
                  end;
              end;
            hs:=hp.vardef.mangledparaname;
            crc:=UpdateCrc32(crc,hs[1],length(hs));
            mangledname:=Copy(mangledname,1,oldlen)+'$crc'+hexstr(crc,8);
          end;
       {$ifdef compress}
        _mangledname:=stringdup(minilzw_encode(mangledname));
       {$else}
        _mangledname:=stringdup(mangledname);
       {$endif}
      end;


    function tprocdef.cplusplusmangledname : string;

      function getcppparaname(p : tdef) : string;

        const
           ordtype2str : array[tbasetype] of string[2] = (
             '',
             'Uc','Us','Ui','Us',
             'Sc','s','i','x',
             'b','b','b','b',
             'c','w','x');

        var
           s : string;

        begin
           case p.deftype of
              orddef:
                s:=ordtype2str[torddef(p).typ];
              pointerdef:
                s:='P'+getcppparaname(tpointerdef(p).pointeddef);
              else
                internalerror(2103001);
           end;
           getcppparaname:=s;
        end;

      var
         s,s2 : string;
         hp   : TParavarsym;
         i    : integer;

      begin
         s := procsym.realname;
         if procsym.owner.symtabletype=objectsymtable then
           begin
              s2:=upper(tobjectdef(procsym.owner.defowner).typesym.realname);
              case proctypeoption of
                 potype_destructor:
                   s:='_$_'+tostr(length(s2))+s2;
                 potype_constructor:
                   s:='___'+tostr(length(s2))+s2;
                 else
                   s:='_'+s+'__'+tostr(length(s2))+s2;
              end;

           end
         else s:=s+'__';

         s:=s+'F';

         { concat modifiers }
         { !!!!! }

         { now we handle the parameters }
         if maxparacount>0 then
           begin
             for i:=0 to paras.count-1 do
               begin
                 hp:=tparavarsym(paras[i]);
                 s2:=getcppparaname(hp.vardef);
                 if hp.varspez in [vs_var,vs_out] then
                   s2:='R'+s2;
                 s:=s+s2;
               end;
           end
         else
           s:=s+'v';
         cplusplusmangledname:=s;
      end;


    procedure tprocdef.setmangledname(const s : string);
      begin
        { This is not allowed anymore, the forward declaration
          already needs to create the correct mangledname, no changes
          afterwards are allowed (PFV) }
        { Exception: interface definitions in mode macpas, since in that }
        {   case no reference to the old name can exist yet (JM)         }
        if assigned(_mangledname) then
          if ((m_mac in current_settings.modeswitches) and
              (interfacedef)) then
            stringdispose(_mangledname)
          else
            internalerror(200411171);
      {$ifdef compress}
        _mangledname:=stringdup(minilzw_encode(s));
      {$else}
        _mangledname:=stringdup(s);
      {$endif}
        include(procoptions,po_has_mangledname);
      end;


{***************************************************************************
                                 TPROCVARDEF
***************************************************************************}

    constructor tprocvardef.create(level:byte);
      begin
         inherited create(procvardef,level);
      end;


    constructor tprocvardef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(procvardef,ppufile);
         { load para symtable }
         parast:=tparasymtable.create(unknown_level);
         tparasymtable(parast).ppuload(ppufile);
         parast.defowner:=self;
      end;


    function tprocvardef.getcopy : tstoreddef;
      begin
        result:=self;
      (*
          { saves a definition to the return type }
          returndef         : ttype;
          parast          : tsymtable;
          paras           : tparalist;
          proctypeoption  : tproctypeoption;
          proccalloption  : tproccalloption;
          procoptions     : tprocoptions;
          requiredargarea : aint;
          { number of user visibile parameters }
          maxparacount,
          minparacount    : byte;
{$ifdef i386}
          fpu_used        : longint;    { how many stack fpu must be empty }
{$endif i386}
          funcretloc : array[tcallercallee] of TLocation;
          has_paraloc_info : boolean; { paraloc info is available }

       tprocvardef = class(tabstractprocdef)
          constructor create(level:byte);
          constructor ppuload(ppufile:tcompilerppufile);
          function getcopy : tstoreddef;override;
       *)
      end;


    procedure tprocvardef.ppuwrite(ppufile:tcompilerppufile);
      var
        oldparasymtable,
        oldlocalsymtable : tsymtable;
      begin
        oldparasymtable:=aktparasymtable;
        oldlocalsymtable:=aktlocalsymtable;
        aktparasymtable:=parast;
        aktlocalsymtable:=nil;

        { here we cannot get a real good value so just give something }
        { plausible (PM) }
        { a more secure way would be
          to allways store in a temp }
{$ifdef i386}
        if is_fpu(returndef) then
          fpu_used:={2}maxfpuregs
        else
          fpu_used:=0;
{$endif i386}
        inherited ppuwrite(ppufile);

        { Write this entry }
        ppufile.writeentry(ibprocvardef);

        { Save the para symtable, this is taken from the interface }
        tparasymtable(parast).ppuwrite(ppufile);

        aktparasymtable:=oldparasymtable;
        aktlocalsymtable:=oldlocalsymtable;
      end;


    procedure tprocvardef.buildderef;
      var
        oldparasymtable,
        oldlocalsymtable : tsymtable;
      begin
        oldparasymtable:=aktparasymtable;
        oldlocalsymtable:=aktlocalsymtable;
        aktparasymtable:=parast;
        aktlocalsymtable:=nil;

        inherited buildderef;

        aktparasymtable:=oldparasymtable;
        aktlocalsymtable:=oldlocalsymtable;
      end;


    procedure tprocvardef.deref;
      var
        oldparasymtable,
        oldlocalsymtable : tsymtable;
      begin
        oldparasymtable:=aktparasymtable;
        oldlocalsymtable:=aktlocalsymtable;
        aktparasymtable:=parast;
        aktlocalsymtable:=nil;

        inherited deref;

        aktparasymtable:=oldparasymtable;
        aktlocalsymtable:=oldlocalsymtable;
      end;


    function tprocvardef.getsymtable(t:tgetsymtable):tsymtable;
      begin
        case t of
          gs_para :
            getsymtable:=parast;
          else
            getsymtable:=nil;
        end;
      end;


    function tprocvardef.size : aint;
      begin
         if (po_methodpointer in procoptions) and
            not(po_addressonly in procoptions) then
           size:=2*sizeof(aint)
         else
           size:=sizeof(aint);
      end;


    function tprocvardef.is_methodpointer:boolean;
      begin
        result:=(po_methodpointer in procoptions);
      end;


    function tprocvardef.is_addressonly:boolean;
      begin
        result:=not(po_methodpointer in procoptions) or
                (po_addressonly in procoptions);
      end;


    function tprocvardef.getmangledparaname:string;
      begin
        result:='procvar';
      end;


    procedure tprocvardef.write_rtti_data(rt:trttitype);

         procedure write_para(parasym:tparavarsym);
         var
           paraspec : byte;
         begin
           { only store user visible parameters }
           if not(vo_is_hidden_para in parasym.varoptions) then
             begin
               case parasym.varspez of
                 vs_value: paraspec := 0;
                 vs_const: paraspec := pfConst;
                 vs_var  : paraspec := pfVar;
                 vs_out  : paraspec := pfOut;
               end;
               { write flags for current parameter }
               current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(paraspec));
               { write name of current parameter }
               current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(length(parasym.realname)));
               current_asmdata.asmlists[al_rtti].concat(Tai_string.Create(parasym.realname));

               { write name of type of current parameter }
               tstoreddef(parasym.vardef).write_rtti_name;
             end;
         end;

       var
         methodkind : byte;
         i : integer;
      begin
        if po_methodpointer in procoptions then
          begin
             { write method id and name }
             current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkmethod));
             write_rtti_name;

{$ifdef cpurequiresproperalignment}
             current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
             { write kind of method (can only be function or procedure)}
             if returndef = voidtype then
               methodkind := mkProcedure
             else
               methodkind := mkFunction;
             current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(methodkind));

             { get # of parameters }
             current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(maxparacount));

             { write parameter info. The parameters must be written in reverse order
               if this method uses right to left parameter pushing! }
             if proccalloption in pushleftright_pocalls then
               begin
                 for i:=0 to paras.count-1 do
                   write_para(tparavarsym(paras[i]));
               end
             else
               begin
                 for i:=paras.count-1 downto 0 do
                   write_para(tparavarsym(paras[i]));
               end;

             { write name of result type }
             tstoreddef(returndef).write_rtti_name;
          end
        else
          begin
            current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkprocvar));
            write_rtti_name;
          end;
      end;


    function tprocvardef.is_publishable : boolean;
      begin
         is_publishable:=(po_methodpointer in procoptions);
      end;


    function tprocvardef.GetTypeName : string;
      var
        s: string;
        showhidden : boolean;
      begin
{$ifdef EXTDEBUG}
         showhidden:=true;
{$else EXTDEBUG}
         showhidden:=false;
{$endif EXTDEBUG}
         s:='<';
         if po_classmethod in procoptions then
           s := s+'class method type of'
         else
           if po_addressonly in procoptions then
             s := s+'address of'
           else
             s := s+'procedure variable type of';
         if po_local in procoptions then
           s := s+' local';
         if assigned(returndef) and
            (returndef<>voidtype) then
           s:=s+' function'+typename_paras(showhidden)+':'+returndef.GetTypeName
         else
           s:=s+' procedure'+typename_paras(showhidden);
         if po_methodpointer in procoptions then
           s := s+' of object';
         GetTypeName := s+';'+ProcCallOptionStr[proccalloption]+'>';
      end;


{***************************************************************************
                              TOBJECTDEF
***************************************************************************}

    type
       tproptablelistitem = class(TLinkedListItem)
          index : longint;
          def   : tobjectdef;
       end;

       tpropnamelistitem = class(TLinkedListItem)
          index : longint;
          name  : stringid;
          owner : tsymtable;
       end;

    var
       proptablelist  : tlinkedlist;
       propnamelist   : tlinkedlist;

    function searchproptablelist(p : tobjectdef) : tproptablelistitem;
      var
         hp : tproptablelistitem;
      begin
         hp:=tproptablelistitem(proptablelist.first);
         while assigned(hp) do
           if hp.def=p then
             begin
                result:=hp;
                exit;
             end
           else
             hp:=tproptablelistitem(hp.next);
         result:=nil;
      end;


    function searchpropnamelist(const n:string) : tpropnamelistitem;
      var
         hp : tpropnamelistitem;
      begin
         hp:=tpropnamelistitem(propnamelist.first);
         while assigned(hp) do
           if hp.name=n then
             begin
                result:=hp;
                exit;
             end
           else
             hp:=tpropnamelistitem(hp.next);
         result:=nil;
      end;


   constructor tobjectdef.create(ot : tobjectdeftype;const n : string;c : tobjectdef);
     begin
        inherited create(objectdef);
        objecttype:=ot;
        objectoptions:=[];
        childof:=nil;
        symtable:=tobjectsymtable.create(n,current_settings.packrecords);
        { create space for vmt !! }
        vmt_offset:=0;
        symtable.defowner:=self;
        lastvtableindex:=0;
        set_parent(c);
        objname:=stringdup(upper(n));
        objrealname:=stringdup(n);
        if objecttype in [odt_interfacecorba,odt_interfacecom,odt_dispinterface] then
          prepareguid;
        { setup implemented interfaces }
        if objecttype in [odt_class,odt_interfacecorba] then
          ImplementedInterfaces:=TFPObjectList.Create(true)
        else
          ImplementedInterfaces:=nil;
        writing_class_record_dbginfo:=false;
        iitype := etStandard;
     end;


    constructor tobjectdef.ppuload(ppufile:tcompilerppufile);
      var
         i,
         implintfcount : longint;
         d : tderef;
         ImplIntf : TImplementedInterface;
      begin
         inherited ppuload(objectdef,ppufile);
         objecttype:=tobjectdeftype(ppufile.getbyte);
         objrealname:=stringdup(ppufile.getstring);
         objname:=stringdup(upper(objrealname^));
         symtable:=tobjectsymtable.create(objrealname^,0);
         tobjectsymtable(symtable).datasize:=ppufile.getaint;
         tobjectsymtable(symtable).fieldalignment:=ppufile.getbyte;
         tobjectsymtable(symtable).recordalignment:=ppufile.getbyte;
         vmt_offset:=ppufile.getlongint;
         ppufile.getderef(childofderef);
         ppufile.getsmallset(objectoptions);

         { load guid }
         iidstr:=nil;
         if objecttype in [odt_interfacecom,odt_interfacecorba,odt_dispinterface] then
           begin
              new(iidguid);
              ppufile.getguid(iidguid^);
              iidstr:=stringdup(ppufile.getstring);
              lastvtableindex:=ppufile.getlongint;
           end;

         { load implemented interfaces }
         if objecttype in [odt_class,odt_interfacecorba] then
           begin
             ImplementedInterfaces:=TFPObjectList.Create(true);
             implintfcount:=ppufile.getlongint;
             for i:=0 to implintfcount-1 do
               begin
                 ppufile.getderef(d);
                 ImplIntf:=TImplementedInterface.Create_deref(d);
                 ImplIntf.IOffset:=ppufile.getlongint;
                 ImplementedInterfaces.Add(ImplIntf);
               end;
           end
         else
           ImplementedInterfaces:=nil;

         tobjectsymtable(symtable).ppuload(ppufile);

         symtable.defowner:=self;

         { handles the predefined class tobject  }
         { the last TOBJECT which is loaded gets }
         { it !                                  }
         if (childof=nil) and
            (objecttype=odt_class) and
            (objname^='TOBJECT') then
           class_tobject:=self;
         if (childof=nil) and
            (objecttype=odt_interfacecom) and
            (objname^='IUNKNOWN') then
           interface_iunknown:=self;
         writing_class_record_dbginfo:=false;
       end;

    destructor tobjectdef.destroy;
      begin
         if assigned(symtable) then
           symtable.free;
         stringdispose(objname);
         stringdispose(objrealname);
         if assigned(iidstr) then
           stringdispose(iidstr);
         if assigned(ImplementedInterfaces) then
           ImplementedInterfaces.free;
         if assigned(iidguid) then
           dispose(iidguid);
         inherited destroy;
      end;


    function tobjectdef.getcopy : tstoreddef;
      var
        i : longint;
      begin
        result:=tobjectdef.create(objecttype,objname^,childof);
        tobjectdef(result).symtable:=symtable.getcopy;
        if assigned(objname) then
          tobjectdef(result).objname:=stringdup(objname^);
        if assigned(objrealname) then
          tobjectdef(result).objrealname:=stringdup(objrealname^);
        tobjectdef(result).objectoptions:=objectoptions;
        tobjectdef(result).vmt_offset:=vmt_offset;
        if assigned(iidguid) then
          begin
            new(tobjectdef(result).iidguid);
            move(iidguid^,tobjectdef(result).iidguid^,sizeof(iidguid^));
          end;
        if assigned(iidstr) then
          tobjectdef(result).iidstr:=stringdup(iidstr^);
        tobjectdef(result).lastvtableindex:=lastvtableindex;
        if assigned(ImplementedInterfaces) then
          begin
            for i:=0 to ImplementedInterfaces.count-1 do
              tobjectdef(result).ImplementedInterfaces.Add(TImplementedInterface(ImplementedInterfaces[i]).Getcopy);
          end;
      end;


    procedure tobjectdef.ppuwrite(ppufile:tcompilerppufile);
      var
         i : longint;
         ImplIntf : TImplementedInterface;
      begin
         inherited ppuwrite(ppufile);
         ppufile.putbyte(byte(objecttype));
         ppufile.putstring(objrealname^);
         ppufile.putaint(tobjectsymtable(symtable).datasize);
         ppufile.putbyte(tobjectsymtable(symtable).fieldalignment);
         ppufile.putbyte(tobjectsymtable(symtable).recordalignment);
         ppufile.putlongint(vmt_offset);
         ppufile.putderef(childofderef);
         ppufile.putsmallset(objectoptions);
         if objecttype in [odt_interfacecom,odt_interfacecorba,odt_dispinterface] then
           begin
              ppufile.putguid(iidguid^);
              ppufile.putstring(iidstr^);
              ppufile.putlongint(lastvtableindex);
           end;

         if objecttype in [odt_class,odt_interfacecorba] then
           begin
             ppufile.putlongint(ImplementedInterfaces.Count);
             for i:=0 to ImplementedInterfaces.Count-1 do
               begin
                 ImplIntf:=TImplementedInterface(ImplementedInterfaces[i]);
                 ppufile.putderef(ImplIntf.intfdefderef);
                 ppufile.putlongint(ImplIntf.Ioffset);
               end;
           end;

         ppufile.writeentry(ibobjectdef);

         tobjectsymtable(symtable).ppuwrite(ppufile);
      end;


    function tobjectdef.GetTypeName:string;
      begin
        if (self <> aktobjectdef) then
          GetTypeName:=typename
        else
          { in this case we will go in endless recursion, because then  }
          { there is no tsym associated yet with the def. It can occur  }
          { (tests/webtbf/tw4757.pp), so for now give a generic name    }
          { instead of the actual type name                             }
          GetTypeName:='<Currently Parsed Class>';
      end;


    procedure tobjectdef.buildderef;
      var
         i : longint;
         oldrecsyms : tsymtable;
      begin
         inherited buildderef;
         childofderef.build(childof);
         oldrecsyms:=aktrecordsymtable;
         aktrecordsymtable:=symtable;
         tstoredsymtable(symtable).buildderef;
         aktrecordsymtable:=oldrecsyms;
         if objecttype in [odt_class,odt_interfacecorba] then
           begin
             for i:=0 to ImplementedInterfaces.count-1 do
               TImplementedInterface(ImplementedInterfaces[i]).buildderef;
           end;
      end;


    procedure tobjectdef.deref;
      var
         i : longint;
         oldrecsyms : tsymtable;
      begin
         inherited deref;
         childof:=tobjectdef(childofderef.resolve);
         oldrecsyms:=aktrecordsymtable;
         aktrecordsymtable:=symtable;
         tstoredsymtable(symtable).deref;
         aktrecordsymtable:=oldrecsyms;
         if objecttype in [odt_class,odt_interfacecorba] then
           begin
             for i:=0 to ImplementedInterfaces.count-1 do
               TImplementedInterface(ImplementedInterfaces[i]).deref;
           end;
      end;


    function tobjectdef.getparentdef:tdef;
      begin
{$warning TODO Remove getparentdef hack}
        { With 2 forward declared classes with the child class before the
          parent class the child class is written earlier to the ppu. Leaving it
          possible to have a reference to the parent class for property overriding,
          but the parent class still has the childof not resolved yet (PFV) }
        if childof=nil then
          childof:=tobjectdef(childofderef.resolve);
        result:=childof;
      end;


    procedure tobjectdef.prepareguid;
      begin
        { set up guid }
        if not assigned(iidguid) then
         begin
            new(iidguid);
            fillchar(iidguid^,sizeof(iidguid^),0); { default null guid }
         end;
        { setup iidstring }
        if not assigned(iidstr) then
          iidstr:=stringdup(''); { default is empty string }
      end;


    procedure tobjectdef.set_parent( c : tobjectdef);
      begin
        { nothing to do if the parent was not forward !}
        if assigned(childof) then
          exit;
        childof:=c;
        { some options are inherited !! }
        if assigned(c) then
          begin
             { only important for classes }
             lastvtableindex:=c.lastvtableindex;
             objectoptions:=objectoptions+(c.objectoptions*
               inherited_objectoptions);
             if not (objecttype in [odt_interfacecom,odt_interfacecorba,odt_dispinterface]) then
               begin
                  { add the data of the anchestor class }
                  inc(tobjectsymtable(symtable).datasize,tobjectsymtable(c.symtable).datasize);
                  if (oo_has_vmt in objectoptions) and
                     (oo_has_vmt in c.objectoptions) then
                    dec(tobjectsymtable(symtable).datasize,sizeof(aint));
                  { if parent has a vmt field then
                    the offset is the same for the child PM }
                  if (oo_has_vmt in c.objectoptions) or is_class(self) then
                    begin
                       vmt_offset:=c.vmt_offset;
                       include(objectoptions,oo_has_vmt);
                    end;
               end;
          end;
      end;


   procedure tobjectdef.insertvmt;
     begin
        if objecttype in [odt_interfacecom,odt_interfacecorba,odt_dispinterface] then
          exit;
        if (oo_has_vmt in objectoptions) then
          internalerror(12345)
        else
          begin
             tobjectsymtable(symtable).datasize:=align(tobjectsymtable(symtable).datasize,
                 tobjectsymtable(symtable).fieldalignment);

{$ifdef cpurequiresproperalignment}
             tobjectsymtable(symtable).datasize:=align(tobjectsymtable(symtable).datasize,sizeof(aint));
{$endif cpurequiresproperalignment}

             vmt_offset:=tobjectsymtable(symtable).datasize;
             inc(tobjectsymtable(symtable).datasize,sizeof(aint));
             include(objectoptions,oo_has_vmt);
          end;
     end;



   procedure tobjectdef.check_forwards;
     begin
        if not(objecttype in [odt_interfacecom,odt_interfacecorba,odt_dispinterface]) then
          tstoredsymtable(symtable).check_forwards;
        if (oo_is_forward in objectoptions) then
          begin
             { ok, in future, the forward can be resolved }
             Message1(sym_e_class_forward_not_resolved,objrealname^);
             exclude(objectoptions,oo_is_forward);
          end;
     end;


   { true, if self inherits from d (or if they are equal) }
   function tobjectdef.is_related(d : tdef) : boolean;
     var
        hp : tobjectdef;
     begin
        hp:=self;
        while assigned(hp) do
          begin
             if hp=d then
               begin
                  is_related:=true;
                  exit;
               end;
             hp:=hp.childof;
          end;
        is_related:=false;
     end;


    procedure _searchdestructor(sym:Tnamedindexitem;sd:pointer);
      begin
        { if we found already a destructor, then we exit }
        if (ppointer(sd)^=nil) and
           (Tsym(sym).typ=procsym) then
          ppointer(sd)^:=Tprocsym(sym).search_procdef_bytype(potype_destructor);
      end;


   function tobjectdef.searchdestructor : tprocdef;
     var
        o : tobjectdef;
        sd : tprocdef;
     begin
        searchdestructor:=nil;
        o:=self;
        sd:=nil;
        while assigned(o) do
          begin
             o.symtable.foreach_static(@_searchdestructor,@sd);
             if assigned(sd) then
               begin
                  searchdestructor:=sd;
                  exit;
               end;
             o:=o.childof;
          end;
     end;


    function tobjectdef.size : aint;
      begin
        if objecttype in [odt_class,odt_interfacecom,odt_interfacecorba,odt_dispinterface] then
          result:=sizeof(aint)
        else
          result:=tobjectsymtable(symtable).datasize;
      end;


    function tobjectdef.alignment:shortint;
      begin
        if objecttype in [odt_class,odt_interfacecom,odt_interfacecorba,odt_dispinterface] then
          alignment:=sizeof(aint)
        else
          alignment:=tobjectsymtable(symtable).recordalignment;
      end;


    function tobjectdef.vmtmethodoffset(index:longint):longint;
      begin
        { for offset of methods for classes, see rtl/inc/objpash.inc }
        case objecttype of
        odt_class:
          { the +2*sizeof(Aint) is size and -size }
          vmtmethodoffset:=(index+10)*sizeof(aint)+2*sizeof(AInt);
        odt_interfacecom,odt_interfacecorba:
          vmtmethodoffset:=index*sizeof(aint);
        else
{$ifdef WITHDMT}
          vmtmethodoffset:=(index+4)*sizeof(aint);
{$else WITHDMT}
          vmtmethodoffset:=(index+3)*sizeof(aint);
{$endif WITHDMT}
        end;
      end;


    function tobjectdef.vmt_mangledname : string;
      begin
        if not(oo_has_vmt in objectoptions) then
          Message1(parser_n_object_has_no_vmt,objrealname^);
        vmt_mangledname:=make_mangledname('VMT',owner,objname^);
      end;


    function tobjectdef.rtti_name : string;
      begin
        rtti_name:=make_mangledname('RTTI',owner,objname^);
      end;


    function tobjectdef.needs_inittable : boolean;
      begin
         case objecttype of
            odt_dispinterface,
            odt_class :
              needs_inittable:=false;
            odt_interfacecom:
              needs_inittable:=true;
            odt_interfacecorba:
              needs_inittable:=is_related(interface_iunknown);
            odt_object:
              needs_inittable:=tobjectsymtable(symtable).needs_init_final;
            else
              internalerror(200108267);
         end;
      end;


    function tobjectdef.members_need_inittable : boolean;
      begin
        members_need_inittable:=tobjectsymtable(symtable).needs_init_final;
      end;


    function tobjectdef.find_implemented_interface(aintfdef:tobjectdef):TImplementedInterface;
      var
        ImplIntf : TImplementedInterface;
        i : longint;
      begin
        result:=nil;
        if not assigned(ImplementedInterfaces) then
          exit;
        for i:=0 to ImplementedInterfaces.Count-1 do
          begin
            ImplIntf:=TImplementedInterface(ImplementedInterfaces[i]);
            if ImplIntf.intfdef=aintfdef then
              begin
                result:=ImplIntf;
                exit;
              end;
          end;
      end;


    procedure tobjectdef.collect_published_properties(sym:tnamedindexitem;arg:pointer);
      var
        hp : tpropnamelistitem;
      begin
         if (tsym(sym).typ=propertysym) and
            (sp_published in tsym(sym).symoptions) then
           begin
             hp:=searchpropnamelist(tsym(sym).name);
             if not(assigned(hp)) then
               begin
                  hp:=tpropnamelistitem.create;
                  hp.name:=tsym(sym).name;
                  hp.index:=propnamelist.count;
                  hp.owner:=tsym(sym).owner;
                  propnamelist.concat(hp);
               end;
          end;
      end;


    procedure tobjectdef.count_published_properties(sym:tnamedindexitem;arg:pointer);
      begin
         if (tsym(sym).typ=propertysym) and
            (sp_published in tsym(sym).symoptions) then
           inc(plongint(arg)^);
      end;


    procedure tobjectdef.write_property_info(sym : tnamedindexitem;arg:pointer);
      var
         proctypesinfo : byte;
         propnameitem  : tpropnamelistitem;

        procedure writeaccessproc(pap:tpropaccesslisttypes; shiftvalue : byte; unsetvalue: byte);
        var
           typvalue : byte;
           hp : ppropaccesslistitem;
           address : longint;
           def : tdef;
           hpropsym : tpropertysym;
           propaccesslist : tpropaccesslist;
        begin
           hpropsym:=tpropertysym(sym);
           repeat
             propaccesslist:=hpropsym.propaccesslist[pap];
             if not propaccesslist.empty then
               break;
             hpropsym:=hpropsym.overridenpropsym;
           until not assigned(hpropsym);
           if not(assigned(propaccesslist) and assigned(propaccesslist.firstsym))  then
             begin
                current_asmdata.asmlists[al_rtti].concat(Tai_const.create(aitconst_ptr,unsetvalue));
                typvalue:=3;
             end
           else if propaccesslist.firstsym^.sym.typ=fieldvarsym then
             begin
                address:=0;
                hp:=propaccesslist.firstsym;
                def:=nil;
                while assigned(hp) do
                  begin
                     case hp^.sltype of
                       sl_load :
                         begin
                           def:=tfieldvarsym(hp^.sym).vardef;
                           inc(address,tfieldvarsym(hp^.sym).fieldoffset);
                         end;
                       sl_subscript :
                         begin
                           if not(assigned(def) and (def.deftype=recorddef)) then
                             internalerror(200402171);
                           inc(address,tfieldvarsym(hp^.sym).fieldoffset);
                           def:=tfieldvarsym(hp^.sym).vardef;
                         end;
                       sl_vec :
                         begin
                           if not(assigned(def) and (def.deftype=arraydef)) then
                             internalerror(200402172);
                           def:=tarraydef(def).elementdef;
                           inc(address,def.size*hp^.value);
                         end;
                     end;
                     hp:=hp^.next;
                  end;
                current_asmdata.asmlists[al_rtti].concat(Tai_const.create(aitconst_ptr,address));
                typvalue:=0;
             end
           else
             begin
                { When there was an error then procdef is not assigned }
                if not assigned(propaccesslist.procdef) then
                  exit;
                if not(po_virtualmethod in tprocdef(propaccesslist.procdef).procoptions) then
                  begin
                     current_asmdata.asmlists[al_rtti].concat(Tai_const.createname(tprocdef(propaccesslist.procdef).mangledname,0));
                     typvalue:=1;
                  end
                else
                  begin
                     { virtual method, write vmt offset }
                     current_asmdata.asmlists[al_rtti].concat(Tai_const.create(aitconst_ptr,
                       tprocdef(propaccesslist.procdef)._class.vmtmethodoffset(tprocdef(propaccesslist.procdef).extnumber)));
                     typvalue:=2;
                  end;
             end;
           proctypesinfo:=proctypesinfo or (typvalue shl shiftvalue);
        end;

      begin
         if (tsym(sym).typ=propertysym) and
            (sp_published in tsym(sym).symoptions) then
           begin
             if ppo_indexed in tpropertysym(sym).propoptions then
               proctypesinfo:=$40
             else
               proctypesinfo:=0;
             current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_sym(tstoreddef(tpropertysym(sym).propdef).get_rtti_label(fullrtti)));
             writeaccessproc(palt_read,0,0);
             writeaccessproc(palt_write,2,0);
             { is it stored ? }
             if not(ppo_stored in tpropertysym(sym).propoptions) then
               begin
                 { no, so put a constant zero }
                 current_asmdata.asmlists[al_rtti].concat(Tai_const.create(aitconst_ptr,0));
                 proctypesinfo:=proctypesinfo or (3 shl 4);
               end
             else
               writeaccessproc(palt_stored,4,1); { maybe; if no procedure put a constant 1 (=true) }
             current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_32bit(tpropertysym(sym).index));
             current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_32bit(tpropertysym(sym).default));
             propnameitem:=searchpropnamelist(tpropertysym(sym).name);
             if not assigned(propnameitem) then
               internalerror(200512201);
             current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_16bit(propnameitem.index));
             current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(proctypesinfo));
             current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(length(tpropertysym(sym).realname)));
             current_asmdata.asmlists[al_rtti].concat(Tai_string.Create(tpropertysym(sym).realname));
{$ifdef cpurequiresproperalignment}
             current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
          end;
      end;


    procedure tobjectdef.generate_published_child_rtti(sym : tnamedindexitem;arg:pointer);
      begin
         if needs_prop_entry(tsym(sym)) then
          begin
            case tsym(sym).typ of
              propertysym:
                tstoreddef(tpropertysym(sym).propdef).get_rtti_label(fullrtti);
              fieldvarsym:
                tstoreddef(tfieldvarsym(sym).vardef).get_rtti_label(fullrtti);
              else
                internalerror(1509991);
            end;
          end;
      end;


    procedure tobjectdef.write_child_rtti_data(rt:trttitype);
      begin
         FRTTIType:=rt;
         case rt of
           initrtti :
             symtable.foreach(@generate_field_rtti,nil);
           fullrtti :
             symtable.foreach(@generate_published_child_rtti,nil);
           else
             internalerror(200108301);
         end;
      end;


    procedure tobjectdef.count_published_fields(sym:tnamedindexitem;arg:pointer);
      var
         hp : tproptablelistitem;
      begin
         if (tsym(sym).typ=fieldvarsym) and
            (sp_published in tsym(sym).symoptions) then
          begin
             if tfieldvarsym(sym).vardef.deftype<>objectdef then
               internalerror(0206001);
             hp:=searchproptablelist(tobjectdef(tfieldvarsym(sym).vardef));
             if not(assigned(hp)) then
               begin
                  hp:=tproptablelistitem.create;
                  hp.def:=tobjectdef(tfieldvarsym(sym).vardef);
                  hp.index:=proptablelist.count+1;
                  proptablelist.concat(hp);
               end;
             inc(plongint(arg)^);
          end;
      end;


    procedure tobjectdef.writefields(sym:tnamedindexitem;arg:pointer);
      var
         hp : tproptablelistitem;
      begin
         if needs_prop_entry(tsym(sym)) and
          (tsym(sym).typ=fieldvarsym) then
          begin
{$ifdef cpurequiresproperalignment}
             current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(AInt)));
{$endif cpurequiresproperalignment}
             current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_aint(tfieldvarsym(sym).fieldoffset));
             hp:=searchproptablelist(tobjectdef(tfieldvarsym(sym).vardef));
             if not(assigned(hp)) then
               internalerror(0206002);
             current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_16bit(hp.index));
             current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(length(tfieldvarsym(sym).realname)));
             current_asmdata.asmlists[al_rtti].concat(Tai_string.Create(tfieldvarsym(sym).realname));
          end;
      end;


    function tobjectdef.generate_field_table : tasmlabel;
      var
         fieldtable,
         classtable : tasmlabel;
         hp : tproptablelistitem;
         fieldcount : longint;
      begin
         proptablelist:=TLinkedList.Create;
         current_asmdata.getdatalabel(fieldtable);
         current_asmdata.getdatalabel(classtable);
         maybe_new_object_file(current_asmdata.asmlists[al_rtti]);
         new_section(current_asmdata.asmlists[al_rtti],sec_rodata,classtable.name,const_align(sizeof(aint)));
         { fields }
         fieldcount:=0;
         symtable.foreach(@count_published_fields,@fieldcount);
         current_asmdata.asmlists[al_rtti].concat(Tai_label.Create(fieldtable));
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_16bit(fieldcount));
{$ifdef cpurequiresproperalignment}
         current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_sym(classtable));
         symtable.foreach(@writefields,nil);

         { generate the class table }
         current_asmdata.asmlists[al_rtti].concat(tai_align.create(const_align(sizeof(aint))));
         current_asmdata.asmlists[al_rtti].concat(Tai_label.Create(classtable));
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_16bit(proptablelist.count));
{$ifdef cpurequiresproperalignment}
         current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
         hp:=tproptablelistitem(proptablelist.first);
         while assigned(hp) do
           begin
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Createname(tobjectdef(hp.def).vmt_mangledname,0));
              hp:=tproptablelistitem(hp.next);
           end;

         generate_field_table:=fieldtable;
         proptablelist.free;
         proptablelist:=nil;
      end;


    procedure tobjectdef.write_rtti_data(rt:trttitype);

        procedure collect_unique_published_props(pd:tobjectdef);
        begin
          if assigned(pd.childof) then
            collect_unique_published_props(pd.childof);
          pd.symtable.foreach(@collect_published_properties,nil);
        end;

      var
        i : longint;
        propcount : longint;
      begin
         case objecttype of
            odt_class:
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkclass));
            odt_object:
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkobject));
            odt_interfacecom:
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkinterface));
            odt_interfacecorba:
              current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(tkinterfaceCorba));
          else
            exit;
          end;

         { generate the name }
         current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(length(objrealname^)));
         current_asmdata.asmlists[al_rtti].concat(Tai_string.Create(objrealname^));
{$ifdef cpurequiresproperalignment}
         current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
         case rt of
           initrtti :
             begin
               current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_32bit(size));
               if objecttype in [odt_class,odt_object] then
                begin
                  count:=0;
                  FRTTIType:=rt;
                  symtable.foreach(@count_field_rtti,nil);
                  current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_32bit(count));
                  symtable.foreach(@write_field_rtti,nil);
                end;
             end;
           fullrtti :
             begin
               { Collect unique property names with nameindex }
               propnamelist:=TLinkedList.Create;
               collect_unique_published_props(self);

               if not(objecttype in [odt_interfacecom,odt_interfacecorba]) then
                 begin
                   if (oo_has_vmt in objectoptions) then
                     current_asmdata.asmlists[al_rtti].concat(Tai_const.Createname(vmt_mangledname,0))
                   else
                     current_asmdata.asmlists[al_rtti].concat(Tai_const.create_sym(nil));
                 end;

               { write parent typeinfo }
               if assigned(childof) and ((oo_can_have_published in childof.objectoptions) or
                 (objecttype in [odt_interfacecom,odt_interfacecorba])) then
                 current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_sym(childof.get_rtti_label(fullrtti)))
               else
                 current_asmdata.asmlists[al_rtti].concat(Tai_const.create_sym(nil));

               if objecttype in [odt_object,odt_class] then
                 begin
                   { total number of unique properties }
                   current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_16bit(propnamelist.count));
                 end
               else
                 { interface: write flags, iid and iidstr }
                 begin
                   current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_32bit(
                     { ugly, but working }
                     longint([
                       TCompilerIntfFlag(ord(ifHasGuid)*ord(assigned(iidguid))),
                       TCompilerIntfFlag(ord(ifHasStrGUID)*ord(assigned(iidstr)))
                     ])
                     {
                     ifDispInterface,
                     ifDispatch, }
                     ));
{$ifdef cpurequiresproperalignment}
                   current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
                   current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_32bit(longint(iidguid^.D1)));
                   current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_16bit(iidguid^.D2));
                   current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_16bit(iidguid^.D3));
                   for i:=Low(iidguid^.D4) to High(iidguid^.D4) do
                     current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(iidguid^.D4[i]));
                 end;

               { write unit name }
               current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(length(current_module.realmodulename^)));
               current_asmdata.asmlists[al_rtti].concat(Tai_string.Create(current_module.realmodulename^));

{$ifdef cpurequiresproperalignment}
               current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}

               { write iidstr }
               if objecttype in [odt_interfacecom,odt_interfacecorba] then
                 begin
                   if assigned(iidstr) then
                     begin
                       current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(length(iidstr^)));
                       current_asmdata.asmlists[al_rtti].concat(Tai_string.Create(iidstr^));
                     end
                   else
                     current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(0));
{$ifdef cpurequiresproperalignment}
                   current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
                 end;

               { write published properties for this object }
               if objecttype in [odt_object,odt_class] then
                 begin
                   propcount:=0;
                   symtable.foreach(@count_published_properties,@propcount);
                   current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_16bit(propcount));
{$ifdef cpurequiresproperalignment}
                   current_asmdata.asmlists[al_rtti].concat(Tai_align.Create(sizeof(TConstPtrUInt)));
{$endif cpurequiresproperalignment}
                 end;
               symtable.foreach(@write_property_info,nil);

               propnamelist.free;
               propnamelist:=nil;
             end;
         end;
      end;


    function tobjectdef.is_publishable : boolean;
      begin
         is_publishable:=objecttype in [odt_class,odt_interfacecom,odt_interfacecorba];
      end;


{****************************************************************************
                             TImplementedInterface
****************************************************************************}

    constructor TImplementedInterface.create(aintf: tobjectdef);
      begin
        inherited create;
        intfdef:=aintf;
        ioffset:=-1;
        NameMappings:=nil;
        procdefs:=nil;
      end;


    constructor TImplementedInterface.create_deref(d:tderef);
      begin
        inherited create;
        intfdef:=nil;
        intfdefderef:=d;
        ioffset:=-1;
        NameMappings:=nil;
        procdefs:=nil;
      end;


    destructor  TImplementedInterface.destroy;
      var
        i : longint;
        mappedname : pshortstring;
      begin
        if assigned(NameMappings) then
          begin
            for i:=0 to NameMappings.Count-1 do
              begin
                mappedname:=pshortstring(NameMappings[i]);
                stringdispose(mappedname);
              end;
            NameMappings.free;
          end;
        if assigned(procdefs) then
          procdefs.free;
        inherited destroy;
      end;


    procedure TImplementedInterface.buildderef;
      begin
        intfdefderef.build(intfdef);
      end;


    procedure TImplementedInterface.deref;
      begin
        intfdef:=tobjectdef(intfdefderef.resolve);
      end;


    procedure TImplementedInterface.AddMapping(const origname,newname: string);
      begin
        if not assigned(NameMappings) then
          NameMappings:=TFPHashList.Create;
        NameMappings.Add(origname,stringdup(newname));
      end;


    function TImplementedInterface.GetMapping(const origname: string):string;
      var
        mappedname : pshortstring;
      begin
        result:='';
        if not assigned(NameMappings) then
          exit;
        mappedname:=PShortstring(NameMappings.Find(origname));
        if assigned(mappedname) then
          result:=mappedname^;
      end;


    procedure TImplementedInterface.AddImplProc(pd:tprocdef);
      var
        i : longint;
        found : boolean;
      begin
        if not assigned(procdefs) then
          procdefs:=TFPObjectList.Create(false);
        { No duplicate entries of the same procdef }
        found:=false;
        for i:=0 to procdefs.count-1 do
          if tprocdef(procdefs[i])=pd then
            begin
              found:=true;
              break;
            end;
        if not found then
          procdefs.Add(pd);
      end;


    function TImplementedInterface.IsImplMergePossible(MergingIntf:TImplementedInterface;out weight: longint): boolean;
      var
        i : longint;
      begin
        result:=false;
        weight:=0;
        { empty interface is mergeable }
        if ProcDefs.Count=0 then
          begin
            result:=true;
            exit;
          end;
        { The interface to merge must at least the number of
          procedures of this interface }
        if MergingIntf.ProcDefs.Count<ProcDefs.Count then
          exit;
        for i:=0 to ProcDefs.Count-1 do
          begin
            if MergingIntf.ProcDefs[i]<>ProcDefs[i] then
              exit;
          end;
        weight:=ProcDefs.Count;
        result:=true;
      end;


    function TImplementedInterface.getcopy:TImplementedInterface;
      begin
        Result:=TImplementedInterface.Create(nil);
        Move(pointer(self)^,pointer(result)^,InstanceSize);
      end;


{****************************************************************************
                                TFORWARDDEF
****************************************************************************}

   constructor tforwarddef.create(const s:string;const pos : tfileposinfo);
     begin
        inherited create(forwarddef);
        tosymname:=stringdup(s);
        forwardpos:=pos;
     end;


    function tforwarddef.GetTypeName:string;
      begin
        GetTypeName:='unresolved forward to '+tosymname^;
      end;

     destructor tforwarddef.destroy;
      begin
        if assigned(tosymname) then
          stringdispose(tosymname);
        inherited destroy;
      end;


{****************************************************************************
                               TUNDEFINEDDEF
****************************************************************************}

   constructor tundefineddef.create;
     begin
        inherited create(undefineddef);
     end;


    constructor tundefineddef.ppuload(ppufile:tcompilerppufile);
      begin
         inherited ppuload(undefineddef,ppufile);
      end;

    function tundefineddef.GetTypeName:string;
      begin
        GetTypeName:='<undefined type>';
      end;


    procedure tundefineddef.ppuwrite(ppufile:tcompilerppufile);
      begin
         inherited ppuwrite(ppufile);
         ppufile.writeentry(ibundefineddef);
      end;


{****************************************************************************
                                  TERRORDEF
****************************************************************************}

    constructor terrordef.create;
      begin
        inherited create(errordef);
      end;


    procedure terrordef.ppuwrite(ppufile:tcompilerppufile);
      begin
        { Can't write errordefs to ppu }
        internalerror(200411063);
      end;


    function terrordef.GetTypeName:string;
      begin
        GetTypeName:='<erroneous type>';
      end;


    function terrordef.getmangledparaname:string;
      begin
        getmangledparaname:='error';
      end;


{****************************************************************************
                           Definition Helpers
****************************************************************************}

    function is_interfacecom(def: tdef): boolean;
      begin
        is_interfacecom:=
          assigned(def) and
          (def.deftype=objectdef) and
          (tobjectdef(def).objecttype=odt_interfacecom);
      end;

    function is_interfacecorba(def: tdef): boolean;
      begin
        is_interfacecorba:=
          assigned(def) and
          (def.deftype=objectdef) and
          (tobjectdef(def).objecttype=odt_interfacecorba);
      end;

    function is_interface(def: tdef): boolean;
      begin
        is_interface:=
          assigned(def) and
          (def.deftype=objectdef) and
          (tobjectdef(def).objecttype in [odt_interfacecom,odt_interfacecorba]);
      end;


    function is_dispinterface(def: tdef): boolean;
      begin
        result:=
          assigned(def) and
          (def.deftype=objectdef) and
          (tobjectdef(def).objecttype=odt_dispinterface);
      end;


    function is_class(def: tdef): boolean;
      begin
        is_class:=
          assigned(def) and
          (def.deftype=objectdef) and
          (tobjectdef(def).objecttype=odt_class);
      end;

    function is_object(def: tdef): boolean;
      begin
        is_object:=
          assigned(def) and
          (def.deftype=objectdef) and
          (tobjectdef(def).objecttype=odt_object);
      end;

    function is_cppclass(def: tdef): boolean;
      begin
        is_cppclass:=
          assigned(def) and
          (def.deftype=objectdef) and
          (tobjectdef(def).objecttype=odt_cppclass);
      end;

    function is_class_or_interface(def: tdef): boolean;
      begin
        is_class_or_interface:=
          assigned(def) and
          (def.deftype=objectdef) and
          (tobjectdef(def).objecttype in [odt_class,odt_interfacecom,odt_interfacecorba]);
      end;


    function is_class_or_interface_or_dispinterface(def: tdef): boolean;
      begin
        result:=
          assigned(def) and
          (def.deftype=objectdef) and
          (tobjectdef(def).objecttype in [odt_class,odt_interfacecom,odt_interfacecorba,odt_dispinterface]);
      end;


{$ifdef x86}
    function use_sse(def : tdef) : boolean;
      begin
        use_sse:=(is_single(def) and (current_settings.fputype in sse_singlescalar)) or
          (is_double(def) and (current_settings.fputype in sse_doublescalar));
      end;
{$endif x86}

end.