Il 24/10/2017 14:10, Michael Van Canneyt via Lazarus ha scritto:
A valid method can never be stored in a pointer, since the former is
actually 2 pointers (method/data) and the latter is just 1 pointer.
That the assignment is valid is Delphi compatible: only the procedure
address is copied.
I wonder if Delphi does such a stupid thing, or rather it stores in the
pointer the address of a pointer pair (method/data).
However here the issue is that a pointer can be assigned to a "procedure
of object" without flagging an error:
type
TProc = Procedure of object;
......
NextProc: TProc;
....
@NextProc := Coda.Remove; // Remove returns a pointer
Sending := True;
NextProc;
This compiles (in Delphi mode) without generating an error, and it is
wrong, because NextProc is a Method, not a simple procedure.
Giuliano
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