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program terecs6;
{$mode delphi}
{$apptype console}
uses
SysUtils;
type
TFoo = record
F: Integer;
class operator Explicit(a: TFoo): Integer;
class operator Implicit(a: TFoo): Integer;
class operator Equal(a, b: TFoo): Boolean;
class operator NotEqual(a, b: TFoo): Boolean;
class operator In(a, b: TFoo): Boolean;
class operator GreaterThan(a, b: TFoo): Boolean;
class operator GreaterThanOrEqual(a, b: TFoo): Boolean;
class operator LessThan(a, b: TFoo): Boolean;
class operator LessThanOrEqual(a, b: TFoo): Boolean;
class operator Add(a, b: TFoo): Integer;
class operator Subtract(a, b: TFoo): Integer;
class operator Multiply(a, b: TFoo): Integer;
class operator Divide(a, b: TFoo): Integer;
class operator IntDivide(a, b: TFoo): Integer;
class operator Modulus(a, b: TFoo): Integer;
class operator LeftShift(a, b: TFoo): Integer;
class operator RightShift(a, b: TFoo): Integer;
class operator LogicalOr(a, b: TFoo): Boolean;
class operator LogicalAnd(a, b: TFoo): Boolean;
class operator LogicalXor(a, b: TFoo): Boolean;
class operator LogicalNot(a: TFoo): TFoo;
class operator BitwiseOr(a, b: TFoo): TFoo;
class operator BitwiseAnd(a, b: TFoo): TFoo;
class operator BitwiseXor(a, b: TFoo): TFoo;
class operator Inc(a: TFoo): TFoo;
class operator Dec(a: TFoo): TFoo;
end;
class operator TFoo.Explicit(a: TFoo): Integer;
begin
// to check the difference with implicit
Result := a.F + 1;
end;
class operator TFoo.Implicit(a: TFoo): Integer;
begin
Result := a.F;
end;
class operator TFoo.Equal(a, b: TFoo): Boolean;
begin
Result := a.F = b.F;
end;
class operator TFoo.NotEqual(a, b: TFoo): Boolean;
begin
Result := a.F <> b.F;
end;
class operator TFoo.In(a, b: TFoo): Boolean;
begin
Result := a.F in [0..b.F];
end;
class operator TFoo.GreaterThan(a, b: TFoo): Boolean;
begin
Result := a.F > b.F;
end;
class operator TFoo.GreaterThanOrEqual(a, b: TFoo): Boolean;
begin
Result := a.F >= b.F;
end;
class operator TFoo.LessThan(a, b: TFoo): Boolean;
begin
Result := a.F < b.F;
end;
class operator TFoo.LessThanOrEqual(a, b: TFoo): Boolean;
begin
Result := a.F <= b.F;
end;
class operator TFoo.Add(a, b: TFoo): Integer;
begin
Result := a.F + b.F;
end;
class operator TFoo.Subtract(a, b: TFoo): Integer;
begin
Result := a.F - b.F;
end;
class operator TFoo.Multiply(a, b: TFoo): Integer;
begin
Result := a.F * b.F;
end;
class operator TFoo.Divide(a, b: TFoo): Integer;
begin
Result := Round(a.F / b.F);
end;
class operator TFoo.IntDivide(a, b: TFoo): Integer;
begin
Result := a.F div b.F;
end;
class operator TFoo.Modulus(a, b: TFoo): Integer;
begin
Result := a.F mod b.F;
end;
class operator TFoo.LeftShift(a, b: TFoo): Integer;
begin
Result := a.F shl b.F;
end;
class operator TFoo.RightShift(a, b: TFoo): Integer;
begin
Result := a.F shr b.F;
end;
class operator TFoo.LogicalOr(a, b: TFoo): Boolean;
begin
Result := (a.F or b.F) <> 0;
end;
class operator TFoo.LogicalAnd(a, b: TFoo): Boolean;
begin
Result := (a.F and b.F) <> 0;
end;
class operator TFoo.LogicalXor(a, b: TFoo): Boolean;
begin
Result := (a.F xor b.F) <> 0;
end;
class operator TFoo.LogicalNot(a: TFoo): TFoo;
begin
Result.F := not a.F;
end;
class operator TFoo.BitwiseOr(a, b: TFoo): TFoo;
begin
Result.F := a.F or b.F;
end;
class operator TFoo.BitwiseAnd(a, b: TFoo): TFoo;
begin
Result.F := a.F and b.F;
end;
class operator TFoo.BitwiseXor(a, b: TFoo): TFoo;
begin
Result.F := a.F xor b.F;
end;
class operator TFoo.Inc(a: TFoo): TFoo;
begin
Result.F := a.F + 1;
end;
class operator TFoo.Dec(a: TFoo): TFoo;
begin
Result.F := a.F - 1;
end;
var
a, b: TFoo;
i: integer;
begin
a.F := 1;
b.F := 2;
if a = b then
halt(1);
if not (a <> b) then
halt(2);
if not (a in b) then
halt(3);
if (b in a) then
halt(4);
if a > b then
halt(5);
if a >= b then
halt(6);
if not (a < b) then
halt(7);
if not (a <= b) then
halt(8);
if a * b <> 2 then
halt(9);
if a / b <> 0 then
halt(10);
if a div b <> 0 then
halt(11);
if a mod b <> 1 then
halt(12);
if a shl b <> 4 then
halt(13);
if b shr a <> 1 then
halt(14);
if a + b <> 3 then
halt(15);
if a - b <> -1 then
halt(16);
if not (a or b) then
halt(17);
if a and b then
halt(18);
if not (a xor b) then
halt(19);
if (not a).F <> (not 1) then
halt(20);
{ bitwise operators current does not work if logical are defined
if (a or b).F <> (a.F or b.F) then
halt(21);
if (a and b).F <> (a.F and b.F) then
halt(22);
if (a xor b).F <> (a.F xor b.F) then
halt(23);
}
inc(a);
if a.F <> 2 then
halt(24);
dec(b);
if b.F <> 1 then
halt(25);
i := b;
if i <> 1 then
halt(26);
if Integer(b) <> 2 then
halt(27);
WriteLn('ok');
end.
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