File: const-ptr-unique-rpass.rs

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rustc 1.87.0%2Bdfsg1-1
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//@ run-pass

#![feature(ptr_internals, test)]

extern crate test;
use test::black_box as b; // prevent promotion of the argument and const-propagation of the result

use std::ptr::Unique;


const PTR: *mut u32 = Unique::dangling().as_ptr();

pub fn main() {
    // Be super-extra paranoid and cast the fn items to fn pointers before blackboxing them.
    assert_eq!(PTR, b::<fn() -> _>(Unique::<u32>::dangling)().as_ptr());
}