anchor.diff:  // of the structure of the compiled regexp.
    var
     scan, longest : PRegExprChar;
  -  len : cardinal;
  +  len : PtrUInt;
     flags : integer;
    begin
     Result := false; // life too dark
  
positive.code: 
    // Check InputString presence
    if not Assigned (fInputString) then begin
      Error (reeNoInpitStringSpecified);
      EXIT;
     end;
  
  
negative.code:  ERegExpr = class (Exception)
     public
      ErrorCode : integer;
      CompilerErrorPos : PtrInt;
    end;
  
  const
  