# Constant std::boxed::HEAP [−] [src]

    pub const HEAP: ExchangeHeapSingleton = ExchangeHeapSingleton{_force_singleton: (),}

Unstable (`box_heap` #27779)

: may be renamed; uncertain about custom allocator design

A value that represents the 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_heap)]

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

    fn main() {
        let foo: Box<i32> = in HEAP { 5 };
        let foo = box 5;
    }Run

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