alloc::boxed::HEAPUnstable

pub static HEAP: () = ();

A value that represents the global exchange heap. This is the default place that the box keyword allocates into when no place is supplied.

The following two examples are equivalent:

#![feature(box_syntax)]
use std::boxed::HEAP;

fn main() {
    let foo = box(HEAP) Bar::new(2);
    let foo = box Bar::new(2);
}