RE: [boost] Re: [serialization] load_construct proposal

From: Ehsan Akhgari (ehsan_at_[hidden])
Date: 2003-10-14 23:11:49

> -----Original Message-----
> From: David Abrahams
>
> "Ehsan Akhgari" <ehsan_at_beginth   read.zl6writes
>
> > int main()
> > {
> >  void * pv = custom_alloc( sizeof(X) ); // allocate
> >  X * p = new( pv ) X; // create
> >  delete( pv, p );     // destroy
>
> I think this should be, simply,
>
>   p->~X();
>
>
> >  custom_dealloc( p ); // deallocate
> > }

They do the same thing.  Placement delete is just a no-op, and the fact
that the compiler sees the delete keyword causes it to silently invoke
the dtor, and then call the delete function (which is a no-op).  I think
the placement delete syntax is neater and more in sync with the
placement new, though I myself sometimes call the dtor explicitly.  This
is mostly a matter of style and taste.

-------------
Ehsan Akhgari

List Owner: MSVC_at_[hidden]

[ Email: ehsan_at_[hidden] ]
[ WWW: http://www.beginthread.com/Ehsan ]