Am 29.11.2019 um 01:01 schrieb Ryan Joseph via fpc-pascal:
function CopyList (source: TFPSList): TFPSList;
begin
result := TFPSList(source.ClassType.Create);
result.Assign(source);
end;
This can't work. ClassType is of type TClass and TClass.Create calls
TObject.Create, *not* the constructor of your list type, cause the
constructor chain is not virtual.
What you can do is this:
=== code begin ===
generic function CopyList<T: TFPSList> (source: T): T;
begin
result := T.Create;
result.Assign(source);
end;
var
a, b: TNodeObjectList;
begin
a := TNodeObjectList.Create;
b := specialize CopyList<TNodeObjectList>(a);
end.
=== code end ===
Regards,
Sven
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