From 96f73c9de3bfc3f502f0892cb13fef1cc7568010 Mon Sep 17 00:00:00 2001
From: mat <git@matdoes.dev>
Date: Sun, 10 Mar 2024 23:06:02 -0500
Subject: [PATCH] fix unsoundness by sealing SwappableNumber

---
 simdnbt/src/swap_endianness.rs | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/simdnbt/src/swap_endianness.rs b/simdnbt/src/swap_endianness.rs
index 59e7986..58df950 100644
--- a/simdnbt/src/swap_endianness.rs
+++ b/simdnbt/src/swap_endianness.rs
@@ -1,14 +1,19 @@
 use std::{mem, simd::prelude::*};
 
-pub trait SwappableNumber {}
-impl SwappableNumber for u16 {}
-impl SwappableNumber for u32 {}
-impl SwappableNumber for u64 {}
-impl SwappableNumber for i16 {}
-impl SwappableNumber for i32 {}
-impl SwappableNumber for i64 {}
-impl SwappableNumber for f32 {}
-impl SwappableNumber for f64 {}
+mod private {
+    pub trait Sealed {}
+
+    impl Sealed for u16 {}
+    impl Sealed for u32 {}
+    impl Sealed for u64 {}
+    impl Sealed for i16 {}
+    impl Sealed for i32 {}
+    impl Sealed for i64 {}
+    impl Sealed for f32 {}
+    impl Sealed for f64 {}
+}
+pub trait SwappableNumber: private::Sealed {}
+impl<T: private::Sealed> SwappableNumber for T {}
 
 #[inline]
 fn swap_endianness_16bit(bytes: &mut [u8], num: usize) {