Function core::ptr::null_mut

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

Creates a null mutable raw pointer.

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


use std::ptr;

let p: *mut i32 = ptr::null_mut();
assert_eq!(p as usize, 0); // this pointer has the address 0