mirror of https://github.com/rust-lang/rust
17 lines
427 B
Rust
17 lines
427 B
Rust
//@ 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());
|
|
}
|