From 0f4594fe28a322bfd53beb008d187fb3575f9287 Mon Sep 17 00:00:00 2001
From: Congyu <leonwang998@gmail.com>
Date: Sun, 18 Feb 2024 11:03:57 +0800
Subject: [PATCH 1/2] remove '[feature(offset_of)]' as it is stablized in 1.87
 nightly

---
 src/lib.rs | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/lib.rs b/src/lib.rs
index c9b8275..3c4459c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,3 @@
-#![feature(offset_of)]
-#![feature(inline_const)]
 use std::{
     marker::PhantomData,
     mem::{offset_of, MaybeUninit},
@@ -132,7 +130,7 @@ impl<T> Drop for LinkNode<T> {
 impl<T> ListHead<T> {
     #[inline(always)]
     unsafe fn ptr(&mut self) -> NonNull<ListHead<T>> {
-        NonNull::new_unchecked(self as *mut ListHead<T>)
+        NonNull::from(self)
     }
 
     /// Called when node is created.
@@ -266,6 +264,6 @@ impl<T> ListHead<T> {
 
     #[inline(always)]
     const fn offset() -> isize {
-        const { -(offset_of!(Inner<T>, list) as isize) }
+        -(offset_of!(Inner<T>, list) as isize)
     }
 }

From 5ba71ed84dac24e5647aab8dcab87d2f6af28991 Mon Sep 17 00:00:00 2001
From: Congyu <leonwang998@gmail.com>
Date: Sun, 18 Feb 2024 11:11:08 +0800
Subject: [PATCH 2/2] improve add() function

---
 src/lib.rs | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/lib.rs b/src/lib.rs
index 3c4459c..c137eb7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -166,12 +166,13 @@ impl<T> ListHead<T> {
     /// is still complete.
     #[inline(always)]
     unsafe fn add(&mut self, other: &mut ListHead<T>) {
+        let next = self.next.assume_init_mut().as_mut();
+        let other_ptr = other.ptr();
+
         other.prev.write(self.ptr());
         other.next = self.next;
-
-        let next = self.next.assume_init_mut().as_mut();
-        next.prev.write(other.ptr());
-        self.next.write(other.ptr());
+        next.prev.write(other_ptr);
+        self.next.write(other_ptr);
     }
 
     #[inline(always)]