Re: Passing address of stack memory to placement new operator
* mlimber:
Alf P. Steinbach wrote:
* Frederick Gotham:
Alf P. Steinbach posted:
Fred* f = new(p) Fred();
Should be
Fred* f = ::new(p) Fred();
Could you please explain that?
Unqualified placement new might invoke a custom Fred allocation function
instead of the basic placement new.
But if there is a custom placement new operator defined for Fred,
presumably it is meant to be used.
Depends what you want. If you want to leave the decision of how to
allocate the memory to class Fred, use 'new'. If you want to take
charge, saying Here Should Be Placement Construction, use '::new'.
Leaving it unqualified seems fine to me.
If you want to leave the choice of allocation scheme to class Fred, yes,
but given that you've declared a buffer to put the object in, how likely
is that?
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