// 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::NonNull;
const DANGLING: NonNull<u32> = NonNull::dangling();
const CASTED: NonNull<u32> = NonNull::cast(NonNull::<i32>::dangling());
-fn ident<T>(ident: T) -> T {
- ident
-}
-
pub fn main() {
- assert_eq!(DANGLING, ident(NonNull::dangling()));
- assert_eq!(CASTED, ident(NonNull::dangling()));
+ assert_eq!(DANGLING, b(NonNull::dangling()));
+ assert_eq!(CASTED, b(NonNull::dangling()));
}