Re: Why is Ada a good choice for an ambitious beginner to programming

[Hyman Rosen <hyrosen@mail.com>]

Bill Findlay wrote:
> C++ beginners just *might* have to learn about placement new,
> to let them do things that are trivially easy in Ada;

What's the Ada equivalent? Is it something like

     for v'address use (some expression)

C++ "placement new" is somewhat more general - it's a way of
passing parameters to (and thereby also selecting by overload
resolution) a storage allocator. But it is trivially easy to
use - it looks something like

     Type *ptr = new(ap1, ap2, ap3) Type(tp1, tp2, tp3);

The apn arguments are passed to the allocator selected by
overload resolution on them, and the tpn arguments are then
passed to the constructor of Type, which is built in the
space returned by the allocator.

I don't think beginners need to learn about this, though.