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program tmoperator8;
{$MODE DELPHI}
type
TCopyState = (csNone, csSource, csDest);
PFoo = ^TFoo;
TFoo = record
private
class operator Initialize(var aFoo: TFoo);
class operator Finalize(var aFoo: TFoo);
class operator AddRef(var aFoo: TFoo);
class operator Copy(constref aSrc: TFoo; var aDst: TFoo);
public
CopyState: TCopyState;
Ref: Boolean;
F, Test: Integer;
end;
TFooArray = array of TFoo;
procedure TestFoo(const AValue: TFoo; AF, ATest: Integer; ARef: Boolean; ACopyState: TCopyState);
begin
WriteLn(' AValue.F = ', AValue.F);
if AValue.F <> AF then
Halt(1);
WriteLn(' AValue.Test = ', AValue.Test);
if AValue.Test <> ATest then
Halt(2);
WriteLn(' AValue.Ref = ', AValue.Ref);
if AValue.Ref <> ARef then
Halt(4);
WriteLn(' AValue.CopyState = ', Ord(AValue.CopyState));
if AValue.CopyState <> ACopyState then
Halt(3);
end;
class operator TFoo.Initialize(var aFoo: TFoo);
begin
WriteLn('TFoo.Initialize');
aFoo.F := 1;
aFoo.Ref := False;
aFoo.Test := 0;
aFoo.CopyState := csNone;
end;
class operator TFoo.Finalize(var aFoo: TFoo);
begin
WriteLn('TFoo.Finalize');
if (aFoo.F <> 2) and not ((aFoo.F = 3) and aFoo.Ref) then
Halt(5);
aFoo.F := 4;
end;
class operator TFoo.AddRef(var aFoo: TFoo);
begin
WriteLn('TFoo.AddRef');
aFoo.F := 3;
aFoo.Test := aFoo.Test + 1;
aFoo.Ref := True;
end;
class operator TFoo.Copy(constref aSrc: TFoo; var aDst: TFoo);
var
LSrc: PFoo;
begin
WriteLn('TFoo.Copy');
LSrc := @aSrc;
LSrc.CopyState := csSource;
aDst.CopyState := csDest;
aDst.Test := aSrc.Test + 1;
aDst.F := aSrc.F;
end;
procedure TestValue(Value: TFoo);
begin
writeln(' *Test without modifier:');
TestFoo(Value, 3, 1, True, csNone);
end;
procedure TestOut(out Value: TFoo);
begin
WriteLn(' *Test out modifier:');
TestFoo(Value, 1, 0, False, csNone);
Value.F := 2;
end;
procedure TestVar(var Value: TFoo);
begin
writeln(' *Test var modifier:');
TestFoo(Value, 2, 0, False, csNone);
end;
procedure TestConst(const Value: TFoo);
begin
writeln(' *Test const modifier:');
TestFoo(Value, 2, 0, False, csNone);
end;
procedure TestConstref(constref Value: TFoo);
begin
WriteLn(' *Test constref modifier:');
TestFoo(Value, 2, 0, False, csNone);
end;
procedure Test;
var
Foos: TFooArray;
Foos2: TFooArray;
A, B, C: TFoo;
i: Integer;
begin
WriteLn('*** Test for variable copy');
TestFoo(B, 1, 0, False, csNone);
B.F := 2;
A := B;
TestFoo(B, 2, 0, False, csSource);
TestFoo(A, 2, 1, False, csDest);
WriteLn('*** Test for Copy(dyn array)');
SetLength(Foos, 5);
for i := 0 to 4 do
begin
Foos[i].F := 2;
Foos[i].Test := i;
end;
Foos2 := Copy(Foos);
for i := 0 to 4 do
begin
TestFoo(Foos[i], 2, i, False, csNone);
TestFoo(Foos2[i], 3, i + 1, True, csNone);
end;
WriteLn('*** Test for parameters modifiers');
TestValue(C);
C.F := 2; // reset F to pass finalize before out parameter
TestOut(C);
TestVar(C);
TestConst(C);
TestConstref(C);
end;
begin
Test;
WriteLn('end');
end.
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