On 03/02/2013 01:13 PM, Ivanko B wrote:
> TypeOf
>
> Synopsis
>
> function TypeOf (var x): PObjectType;
> Description
>
> Returns a pointer to the VMT of an object type or variable. This
> pointer can be used to identify the type of an object.
>
> TypeOf can be applied to expressions of object type and to object type
> names. In the former case, the actual type of polymorphic objects is
> returned.
>
> Conforming to
> TypeOf is a Borland Pascal extension.
>
> Example
>
> program TypeOfDemo;
> type
> FooPtr = ^Foo;
> BarPtr = ^Bar;
>
> Foo = object { Has a VMT, though it doesn't }
> x: Integer; { contain virtual methods. }
> constructor Init;
> end;
>
> Bar = object (Foo)
> y: Integer;
> end;
>
> constructor Foo.Init;
> begin
> end;
>
> var
> MyFoo: FooPtr;
>
> begin
> MyFoo := New (BarPtr, Init);
> if TypeOf (MyFoo^) = TypeOf (Bar) then { True }
> WriteLn ('OK')
> end.
>
> See also
> BitSizeOf, AlignOf, PObjectType, SetType, SizeOf, OOP.
>
If you are replying to my last post I wanted to know how to determine
the component type while I am in the ide and writing program code.
Not while the program is running.
Patrick
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