Module tagged_ptr 

This module implements tagged pointers. In order to utilize the pointer packing, you must have a tag type implementing the Tag trait.

We assert that the tag and the reference type is compatible at compile time.

Re-exports

use std::fmt; 🔒

use std::hash::Hash; 🔒

use std::hash::Hash; 🔒

use std::hash::Hasher; 🔒

use std::marker::PhantomData; 🔒

use std::num::NonZero; 🔒

use std::ops::Deref; 🔒

use std::ptr::NonNull; 🔒

use crate::aligned::Aligned; 🔒

use crate::stable_hash::StableHash; 🔒

use crate::stable_hash::StableHashCtxt; 🔒

use crate::stable_hash::StableHasher; 🔒

Structs

TaggedRef

A covariant Copy tagged borrow. This is essentially { pointer: &'a P, tag: T } packed in a single reference.

Traits

Tag

This describes tags that the TaggedRef struct can hold.

Functions

bits_for

Returns the number of bits available for use for tags in a pointer to T (this is based on T’s alignment).

bits_for_tags

Returns the correct Tag::BITS constant for a set of tag values.