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use super::{Pointer, Tag};
use crate::stable_hasher::{HashStable, StableHasher};
use std::fmt;
use super::CopyTaggedPtr;
pub struct TaggedPtr<P, T, const COMPARE_PACKED: bool>
where
P: Pointer,
T: Tag,
{
raw: CopyTaggedPtr<P, T, COMPARE_PACKED>,
}
impl<P, T, const COMPARE_PACKED: bool> Clone for TaggedPtr<P, T, COMPARE_PACKED>
where
P: Pointer + Clone,
T: Tag,
{
fn clone(&self) -> Self {
unsafe { Self::new(P::with_ref(self.raw.pointer_raw(), |p| p.clone()), self.raw.tag()) }
}
}
impl<P, T, const COMPARE_PACKED: bool> TaggedPtr<P, T, COMPARE_PACKED>
where
P: Pointer,
T: Tag,
{
pub fn new(pointer: P, tag: T) -> Self {
TaggedPtr { raw: CopyTaggedPtr::new(pointer, tag) }
}
pub fn pointer_ref(&self) -> &P::Target {
self.raw.pointer_ref()
}
pub fn tag(&self) -> T {
self.raw.tag()
}
}
impl<P, T, const COMPARE_PACKED: bool> std::ops::Deref for TaggedPtr<P, T, COMPARE_PACKED>
where
P: Pointer,
T: Tag,
{
type Target = P::Target;
fn deref(&self) -> &Self::Target {
self.raw.pointer_ref()
}
}
impl<P, T, const COMPARE_PACKED: bool> std::ops::DerefMut for TaggedPtr<P, T, COMPARE_PACKED>
where
P: Pointer + std::ops::DerefMut,
T: Tag,
{
fn deref_mut(&mut self) -> &mut Self::Target {
self.raw.pointer_mut()
}
}
impl<P, T, const COMPARE_PACKED: bool> Drop for TaggedPtr<P, T, COMPARE_PACKED>
where
P: Pointer,
T: Tag,
{
fn drop(&mut self) {
unsafe {
std::mem::drop(P::from_usize(self.raw.pointer_raw()));
}
}
}
impl<P, T, const COMPARE_PACKED: bool> fmt::Debug for TaggedPtr<P, T, COMPARE_PACKED>
where
P: Pointer,
P::Target: fmt::Debug,
T: Tag + fmt::Debug,
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("TaggedPtr")
.field("pointer", &self.pointer_ref())
.field("tag", &self.tag())
.finish()
}
}
impl<P, T> PartialEq for TaggedPtr<P, T, true>
where
P: Pointer,
T: Tag,
{
fn eq(&self, other: &Self) -> bool {
self.raw.eq(&other.raw)
}
}
impl<P, T> Eq for TaggedPtr<P, T, true>
where
P: Pointer,
T: Tag,
{
}
impl<P, T> std::hash::Hash for TaggedPtr<P, T, true>
where
P: Pointer,
T: Tag,
{
fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
self.raw.hash(state);
}
}
impl<P, T, HCX, const COMPARE_PACKED: bool> HashStable<HCX> for TaggedPtr<P, T, COMPARE_PACKED>
where
P: Pointer + HashStable<HCX>,
T: Tag + HashStable<HCX>,
{
fn hash_stable(&self, hcx: &mut HCX, hasher: &mut StableHasher) {
self.raw.hash_stable(hcx, hasher);
}
}