freepascal.compiler/compiler/tokens.pas

{
    $Id$
    Copyright (c) 1998-2000 by Florian Klaempfl, Pierre Muller

    Tokens used by the compiler

    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 tokens;

{$i defines.inc}

interface

uses
  globtype;

type
  ttoken=(NOTOKEN,
    { operators, which can also be overloaded }
    _PLUS,
    _MINUS,
    _STAR,
    _SLASH,
    _EQUAL,
    _GT,
    _LT,
    _GTE,
    _LTE,
    _SYMDIF,
    _STARSTAR,
    _OP_AS,
    _OP_IN,
    _OP_IS,
    _OP_OR,
    _OP_AND,
    _OP_DIV,
    _OP_MOD,
    _OP_NOT,
    _OP_SHL,
    _OP_SHR,
    _OP_XOR,
    _ASSIGNMENT,
    { special chars }
    _CARET,
    _UNEQUAL,
    _LECKKLAMMER,
    _RECKKLAMMER,
    _POINT,
    _COMMA,
    _LKLAMMER,
    _RKLAMMER,
    _COLON,
    _SEMICOLON,
    _KLAMMERAFFE,
    _POINTPOINT,
    _DOUBLEADDR,
    _EOF,
    _ID,
    _NOID,
    _REALNUMBER,
    _INTCONST,
    _CSTRING,
    _CCHAR,
    _CWSTRING,
    _CWCHAR,
    { C like operators }
    _PLUSASN,
    _MINUSASN,
    _ANDASN,
    _ORASN,
    _STARASN,
    _SLASHASN,
    _MODASN,
    _DIVASN,
    _NOTASN,
    _XORASN,
    { Normal words }
    _AS,
    _AT,
    _DO,
    _IF,
    _IN,
    _IS,
    _OF,
    _ON,
    _OR,
    _TO,
    _AND,
    _ASM,
    _DIV,
    _END,
    _FAR,
    _FOR,
    _MOD,
    _NEW,
    _NIL,
    _NOT,
    _OUT,
    _SET,
    _SHL,
    _SHR,
    _TRY,
    _VAR,
    _XOR,
    _CASE,
    _CVAR,
    _ELSE,
    _EXIT,
    _FAIL,
    _FILE,
    _GOTO,
    _NAME,
    _NEAR,
    _READ,
    _SELF,
    _THEN,
    _TRUE,
    _TYPE,
    _UNIT,
    _USES,
    _WITH,
    _ALIAS,
    _ARRAY,
    _BEGIN,
    _BREAK,
    _CDECL,
    _CLASS,
    _CONST,
    _FALSE,
    _INDEX,
    _LABEL,
    _RAISE,
    _UNTIL,
    _WHILE,
    _WRITE,
    _DISPID,
    _DOWNTO,
    _EXCEPT,
    _EXPORT,
    _INLINE,
    _OBJECT,
    _PACKED,
    _PASCAL,
    _PUBLIC,
    _RECORD,
    _REPEAT,
    _RESULT,
    _STATIC,
    _STORED,
    _STRING,
    _SYSTEM,
    _ASMNAME,
    _CPPDECL,
    _DEFAULT,
    _DISPOSE,
    _DYNAMIC,
    _EXPORTS,
    _FINALLY,
    _FORWARD,
    _IOCHECK,
    _LIBRARY,
    _MESSAGE,
    _PRIVATE,
    _PROGRAM,
    _STDCALL,
    _SYSCALL,
    _VARARGS,
    _VIRTUAL,
    _ABSOLUTE,
    _ABSTRACT,
    _CONTINUE,
    _CPPCLASS,
    _EXTERNAL,
    _FUNCTION,
    _OPERATOR,
    _OVERLOAD,
    _OVERRIDE,
    _PLATFORM,
    _POPSTACK,
    _PROPERTY,
    _REGISTER,
    _RESIDENT,
    _SAFECALL,
    _ASSEMBLER,
    _INHERITED,
    _INTERFACE,
    _INTERRUPT,
    _NODEFAULT,
    _OTHERWISE,
    _PROCEDURE,
    _PROTECTED,
    _PUBLISHED,
    _THREADVAR,
    _DEPRECATED,
    _DESTRUCTOR,
    _IMPLEMENTS,
    _INTERNPROC,
    _OPENSTRING,
    _CONSTRUCTOR,
    _INTERNCONST,
    _REINTRODUCE,
    _SHORTSTRING,
    _COMPILERPROC,
    _FINALIZATION,
    _DISPINTERFACE,
    _SAVEREGISTERS,
    _IMPLEMENTATION,
    _INITIALIZATION,
    _RESOURCESTRING
  );

const
  tokenlenmin = 2;
  tokenlenmax = 14;

  { last operator which can be overloaded, the first_overloaded should
    be declared directly after NOTOKEN }
  first_overloaded = succ(NOTOKEN);
  last_overloaded  = _ASSIGNMENT;

type
  tokenrec=record
    str     : string[tokenlenmax];
    special : boolean;
    keyword : tmodeswitch;
    op      : ttoken;
  end;

  ttokenarray=array[ttoken] of tokenrec;
  ptokenarray=^ttokenarray;

  tokenidxrec=record
    first,last : ttoken;
  end;

  ptokenidx=^ttokenidx;
  ttokenidx=array[tokenlenmin..tokenlenmax,'A'..'Z'] of tokenidxrec;

const
  arraytokeninfo : ttokenarray =(
      (str:''              ;special:true ;keyword:m_none;op:NOTOKEN),
    { Operators which can be overloaded }
      (str:'+'             ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'-'             ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'*'             ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'/'             ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'='             ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'>'             ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'<'             ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'>='            ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'<='            ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'><'            ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'**'            ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'as'            ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'in'            ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'is'            ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'or'            ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'and'           ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'div'           ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'mod'           ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'not'           ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'shl'           ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'shr'           ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'xor'           ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:':='            ;special:true ;keyword:m_none;op:NOTOKEN),
    { Special chars }
      (str:'^'             ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'<>'            ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'['             ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:']'             ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'.'             ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:','             ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'('             ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:')'             ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:':'             ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:';'             ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'@'             ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'..'            ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'@@'            ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'end of file'   ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'identifier'    ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'non identifier';special:true ;keyword:m_none;op:NOTOKEN),
      (str:'const real'    ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'ordinal const' ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'const string'  ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'const char'    ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'const wstring' ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'const wchar'   ;special:true ;keyword:m_none;op:NOTOKEN),
    { C like operators }
      (str:'+='            ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'-='            ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'&='            ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'|='            ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'*='            ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:'/='            ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:''              ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:''              ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:''              ;special:true ;keyword:m_none;op:NOTOKEN),
      (str:''              ;special:true ;keyword:m_none;op:NOTOKEN),
    { Normal words }
      (str:'AS'            ;special:false;keyword:m_class;op:_OP_AS),
      (str:'AT'            ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'DO'            ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'IF'            ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'IN'            ;special:false;keyword:m_all;op:_OP_IN),
      (str:'IS'            ;special:false;keyword:m_class;op:_OP_IS),
      (str:'OF'            ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'ON'            ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'OR'            ;special:false;keyword:m_all;op:_OP_OR),
      (str:'TO'            ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'AND'           ;special:false;keyword:m_all;op:_OP_AND),
      (str:'ASM'           ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'DIV'           ;special:false;keyword:m_all;op:_OP_DIV),
      (str:'END'           ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'FAR'           ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'FOR'           ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'MOD'           ;special:false;keyword:m_all;op:_OP_MOD),
      (str:'NEW'           ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'NIL'           ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'NOT'           ;special:false;keyword:m_all;op:_OP_NOT),
      (str:'OUT'           ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'SET'           ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'SHL'           ;special:false;keyword:m_all;op:_OP_SHL),
      (str:'SHR'           ;special:false;keyword:m_all;op:_OP_SHR),
      (str:'TRY'           ;special:false;keyword:m_class;op:NOTOKEN),
      (str:'VAR'           ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'XOR'           ;special:false;keyword:m_all;op:_OP_XOR),
      (str:'CASE'          ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'CVAR'          ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'ELSE'          ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'EXIT'          ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'FAIL'          ;special:false;keyword:m_none;op:NOTOKEN), { only set within constructors PM }
      (str:'FILE'          ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'GOTO'          ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'NAME'          ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'NEAR'          ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'READ'          ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'SELF'          ;special:false;keyword:m_none;op:NOTOKEN), {set inside methods only PM }
      (str:'THEN'          ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'TRUE'          ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'TYPE'          ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'UNIT'          ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'USES'          ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'WITH'          ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'ALIAS'         ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'ARRAY'         ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'BEGIN'         ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'BREAK'         ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'CDECL'         ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'CLASS'         ;special:false;keyword:m_class;op:NOTOKEN),
      (str:'CONST'         ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'FALSE'         ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'INDEX'         ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'LABEL'         ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'RAISE'         ;special:false;keyword:m_class;op:NOTOKEN),
      (str:'UNTIL'         ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'WHILE'         ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'WRITE'         ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'DISPID'        ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'DOWNTO'        ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'EXCEPT'        ;special:false;keyword:m_class;op:NOTOKEN),
      (str:'EXPORT'        ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'INLINE'        ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'OBJECT'        ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'PACKED'        ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'PASCAL'        ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'PUBLIC'        ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'RECORD'        ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'REPEAT'        ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'RESULT'        ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'STATIC'        ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'STORED'        ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'STRING'        ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'SYSTEM'        ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'ASMNAME'       ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'CPPDECL'       ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'DEFAULT'       ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'DISPOSE'       ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'DYNAMIC'       ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'EXPORTS'       ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'FINALLY'       ;special:false;keyword:m_class;op:NOTOKEN),
      (str:'FORWARD'       ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'IOCHECK'       ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'LIBRARY'       ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'MESSAGE'       ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'PRIVATE'       ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'PROGRAM'       ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'STDCALL'       ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'SYSCALL'       ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'VARARGS'       ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'VIRTUAL'       ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'ABSOLUTE'      ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'ABSTRACT'      ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'CONTINUE'      ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'CPPCLASS'      ;special:false;keyword:m_fpc;op:NOTOKEN),
      (str:'EXTERNAL'      ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'FUNCTION'      ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'OPERATOR'      ;special:false;keyword:m_fpc;op:NOTOKEN),
      (str:'OVERLOAD'      ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'OVERRIDE'      ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'PLATFORM'      ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'POPSTACK'      ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'PROPERTY'      ;special:false;keyword:m_class;op:NOTOKEN),
      (str:'REGISTER'      ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'RESIDENT'      ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'SAFECALL'      ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'ASSEMBLER'     ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'INHERITED'     ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'INTERFACE'     ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'INTERRUPT'     ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'NODEFAULT'     ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'OTHERWISE'     ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'PROCEDURE'     ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'PROTECTED'     ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'PUBLISHED'     ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'THREADVAR'     ;special:false;keyword:m_class;op:NOTOKEN),
      (str:'DEPRECATED'    ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'DESTRUCTOR'    ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'IMPLEMENTS'    ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'INTERNPROC'    ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'OPENSTRING'    ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'CONSTRUCTOR'   ;special:false;keyword:m_all;op:NOTOKEN),
      (str:'INTERNCONST'   ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'REINTRODUCE'   ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'SHORTSTRING'   ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'COMPILERPROC'  ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'FINALIZATION'  ;special:false;keyword:m_initfinal;op:NOTOKEN),
      (str:'DISPINTERFACE' ;special:false;keyword:m_class;op:NOTOKEN),
      (str:'SAVEREGISTERS' ;special:false;keyword:m_none;op:NOTOKEN),
      (str:'IMPLEMENTATION';special:false;keyword:m_all;op:NOTOKEN),
      (str:'INITIALIZATION';special:false;keyword:m_initfinal;op:NOTOKEN),
      (str:'RESOURCESTRING';special:false;keyword:m_class;op:NOTOKEN)
  );

var
  tokeninfo:ptokenarray;
  tokenidx:ptokenidx;

procedure inittokens;
procedure donetokens;
procedure create_tokenidx;


implementation

procedure create_tokenidx;
{ create an index with the first and last token for every possible token
  length, so a search only will be done in that small part }
var
  t : ttoken;
  i : longint;
  c : char;
begin
  fillchar(tokenidx^,sizeof(tokenidx^),0);
  for t:=low(ttoken) to high(ttoken) do
   begin
     if not arraytokeninfo[t].special then
      begin
        i:=length(arraytokeninfo[t].str);
        c:=arraytokeninfo[t].str[1];
        if ord(tokenidx^[i,c].first)=0 then
         tokenidx^[i,c].first:=t;
        tokenidx^[i,c].last:=t;
      end;
   end;
end;


procedure inittokens;
begin
  tokeninfo:=@arraytokeninfo;
  new(tokenidx);
  create_tokenidx;
end;


procedure donetokens;
begin
  tokeninfo:=nil;
  dispose(tokenidx);
end;

end.
{
  $Log$
  Revision 1.13  2001-08-01 15:07:29  jonas
    + "compilerproc" directive support, which turns both the public and mangled
      name to lowercase(declaration_name). This prevents a normal user from
      accessing the routine, but they can still be easily looked up within
      the compiler. This is used for helper procedures and should facilitate
      the writing of more processor independent code in the code generator
      itself (mostly written by Peter)
    + new "createintern" constructor for tcal nodes to create a call to
      helper exported using the "compilerproc" directive
    + support for high(dynamic_array) using the the above new things
    + definition of 'HASCOMPILERPROC' symbol (to be able to check in the
      compiler and rtl whether the "compilerproc" directive is supported)

  Revision 1.12  2001/07/30 20:59:28  peter
    * m68k updates from v10 merged

  Revision 1.11  2001/06/03 21:57:38  peter
    + hint directive parsing support

  Revision 1.10  2001/05/06 17:12:43  jonas
    - commented out an unused field in tokenrec

  Revision 1.9  2001/05/04 15:52:04  florian
    * some Delphi incompatibilities fixed:

       - out, dispose and new can be used as idenfiers now

       - const p = apointerype(nil); is supported now

    + support for const p = apointertype(pointer(1234)); added

  Revision 1.8  2001/03/22 22:35:43  florian
    + support for type a = (a=1); in Delphi mode added
    + procedure p(); in Delphi mode supported
    + on isn't keyword anymore, it can be used as
      id etc. now

  Revision 1.7  2000/11/29 00:30:42  florian
    * unused units removed from uses clause
    * some changes for widestrings

  Revision 1.6  2000/11/09 17:46:56  florian
    * System.TypeInfo fixed
    + System.Finalize implemented
    + some new keywords for interface support added

  Revision 1.5  2000/10/14 10:14:56  peter
    * moehrendorf oct 2000 rewrite

  Revision 1.4  2000/09/24 15:06:32  peter
    * use defines.inc

  Revision 1.3  2000/07/13 12:08:28  michael
  + patched to 1.1.0 with former 1.09patch from peter

  Revision 1.2  2000/07/13 11:32:52  michael
  + removed logs

}