Function core::ptr::hash

pub fn hash<T, S: Hasher>(hashee: *const T, into: &mut S)

🔬 This is a nightly-only experimental API. (ptr_hash #56286)

newly added

Hash the raw pointer address behind a reference, rather than the value it points to.

Examples

#![feature(ptr_hash)]
use std::collections::hash_map::DefaultHasher;
use std::hash::{Hash, Hasher};
use std::ptr;

let five = 5;
let five_ref = &five;

let mut hasher = DefaultHasher::new();
ptr::hash(five_ref, &mut hasher);
let actual = hasher.finish();

let mut hasher = DefaultHasher::new();
(five_ref as *const i32).hash(&mut hasher);
let expected = hasher.finish();

assert_eq!(actual, expected);