1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
|
program tgeneric33;
{$mode objfpc}{$H+}
type
// regular procdef
generic TProc1<T> = function(Value: T): T;
// object procdef
generic TProc2<T> = function(Value: T): T of object;
TFoo = class
function Test2(Value: Integer): Integer;
end;
function Test1(Value: Integer): Integer;
begin
Result := Value + 1;
end;
function TFoo.Test2(Value: Integer): Integer;
begin
Result := Value - 1;
end;
var
Foo: TFoo;
Proc1: specialize TProc1<Integer>;
Proc2: specialize TProc2<Integer>;
begin
Proc1 := @Test1;
if Proc1(1) <> 2 then
halt(1);
Foo := TFoo.Create;
Proc2 := @Foo.Test2;
if Proc2(2) <> 1 then
halt(2);
Foo.Free;
end.
|