File: uninit-empty-types.rs

package info (click to toggle)
rustc 1.89.0%2Bdfsg1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 906,624 kB
  • sloc: xml: 158,148; python: 34,888; javascript: 19,595; sh: 19,221; ansic: 13,046; cpp: 7,144; asm: 4,376; makefile: 692; lisp: 174; sql: 15
file content (18 lines) | stat: -rw-r--r-- 488 bytes parent folder | download | duplicates (12) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
 
//@ build-pass
// Test the uninit() construct returning various empty types.


use std::mem::MaybeUninit;

struct Foo;

#[allow(deprecated)]
pub fn main() {
    unsafe {
        // `Foo` and `[Foo; 2]` are both zero sized and inhabited, so this is safe.
        let _x: Foo = MaybeUninit::uninit().assume_init();
        let _x: [Foo; 2] = MaybeUninit::uninit().assume_init();
        let _x: Foo = std::mem::uninitialized();
        let _x: [Foo; 2] = std::mem::uninitialized();
    }
}