On 19/09/2010 04:35, Jonathan M Davis wrote:
<snip>
That doesn't work because you're just copying the pointer. Is there a way to
actually do a deep copy of the delegate? I can see why this would be problematic
if the delegate had reference types in its scope (since presumably, they'd have
to be shallow copied unless you somehow had the equivalent of a copy constructor
or postblit constructor for delegates), but even the ability to a do a shallow
copy would be better than nothing. Is there any way to do that, or am I out of
luck?
You mean to duplicate whatever the delegate's context pointer points to?
The trouble is that the context pointer could point to either an object
or a stack frame. Any code to duplicate a delegate on this basis would
need to consider both possibilities. Moreover, a class may or may not
provide a dup method, and there's no predictable vtbl slot for it.
Things get even more complicated when you realise that occasionally
there may be an object allocated on the stack.
As such, this would be a complex feature, and IMO unlikely to be
implemented. I can't even think of any real practical use for it. Can you?
Stewart.
