std::ptr

Function null

1.0.0 (const: 1.24.0) · source 
pub const fn null<T>() -> *const T
where
    T: Thin + ?Sized,
Expand description

Creates a null raw pointer.

This function is equivalent to zero-initializing the pointer: MaybeUninit::<*const T>::zeroed().assume_init(). The resulting pointer has the address 0.

§Examples

use std::ptr;

let p: *const i32 = ptr::null();
assert!(p.is_null());
assert_eq!(p as usize, 0); // this pointer has the address 0