Пример массива констант (Array of Const)

type
  TVarRec = record
    Data: record case Integer of
        0: (L: LongInt);
        1: (B: Boolean);
        2: (C: Char);
        3: (E: ^Extended);
        4: (S: ^string);
        5: (P: Pointer);
        6: (X: PChar);
        7: (O: TObject);
    end;
    Tag: Byte;
    Stuff: array[0..2] of Byte;
  end;

function PtrToStr(P: Pointer): string;
const
  HexChar: array[0..15] of Char = '0123456789ABCDEF';

  function HexByte(B: Byte): string;
  begin
    Result := HexChar[B shr 4] + HexChar[B and 15];
  end;

  function HexWord(W: Word): string;
  begin
    Result := HexByte(Hi(W)) + HexByte(Lo(W));
  end;

begin
  Result := HexWord(HiWord(LongInt(P))) + ':' + HexWord(LoWord(LongInt(P)));
end;

procedure Display(X: array of const);
var
  I: Integer;
begin
  for I := 0 to High(X) do
    with TVarRec(X[I]), Data do
    begin
      case Tag of
        0: ShowMessage('Integer: ' + IntToStr(L));
        1: if B then
            ShowMessage('Boolean: True')
          else
            ShowMessage('Boolean: False');
        2: ShowMessage('Char: ' + C);
        3: ShowMessage('Float: ' + FloatToStr(E^));
        4: ShowMessage('String: ' + S^);
        5: ShowMessage('Pointer: ' + PtrToStr(P));
        6: ShowMessage('PChar: ' + StrPas(X));
        7: ShowMessage('Object: ' + O.ClassName);
      end;
    end;
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  P: array[0..5] of Char;

begin
  P := 'Привет'#0;
  Display([-12345678, True, 'A', 1.2345, 'ABC', Ptr($1234, $5678), P,
    Form1]);
end;