Yes, yes, and
let x = box 5;
let x = ~5;
same thing. It's also more general:
let x = box(GC) 5;
and lets all of these pointers support placement new, which only ~ did
previously:
fn foo() -> int { ...
let x = box foo();
Now that the RFC has been accepted, patches can be written. It'll be a
few days before you'll see the change in code.
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