mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-24 15:54:15 +00:00
30 lines
770 B
Rust
30 lines
770 B
Rust
// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
|
|
|
|
|
|
#![warn(clippy::cmp_null)]
|
|
#![allow(unused_mut)]
|
|
|
|
use std::ptr;
|
|
|
|
fn main() {
|
|
let x = 0;
|
|
let p : *const usize = &x;
|
|
if p == ptr::null() {
|
|
println!("This is surprising!");
|
|
}
|
|
let mut y = 0;
|
|
let mut m : *mut usize = &mut y;
|
|
if m == ptr::null_mut() {
|
|
println!("This is surprising, too!");
|
|
}
|
|
}
|