> I understand that TList is a list of pointers. What I cannot understand is
> why I can't do something like\
>
> for i := 0 to AList.Count do
> begin
> if AList.Items[i]^ is TMyObject then
> with AList.Items[i]^ as TMyObject do
>
> etc etc etc.
You can. You just need to tell the compiler that it is a TObject first.
This then allows the compiler to know that you are dealing with an object.
not just a pointer to a block of memory. It needs to know it's an object
so it knows that there is RTTI attached to this block of memory.
for i := 0 to AList.Count - 1 do
begin
if TObject(AList.Items[i]) is TMyObject then
with TMyObject(AList.Items[i]) do
Or even simpler, if you are only adding the same type of object to the
list, then you do not have to check the type. Just typecast.
for i := 0 to AList.Count - 1 do
begin
with TMyObject(AList.Items[i]) do
> In other words, I suppose my question is "If TList is a list of TPointer,
> the how do I dereference the pointer to access the object? Is accessing
> the
> Items property the only way to do it?"
You do not dereference the pointer because variables that reference
objects are really pointers anyway.
Sly
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