From 42e0c46ad2996af75a30e3cf6ef2d2249892d2ca Mon Sep 17 00:00:00 2001
From: Tony Arcieri <bascule@gmail.com>
Date: Sun, 21 Sep 2025 12:41:36 -0600
Subject: [PATCH 1/2] Add `Array::slice_as_flattened(_mut)` (#142)

As requested in RustCrypto/utils#1221
---
 src/lib.rs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index b5288eb..15bab70 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -400,6 +400,18 @@ where
         // SAFETY: `Self` is a `repr(transparent)` newtype for `[T; N]`
         unsafe { slice::from_raw_parts_mut(slice.as_mut_ptr().cast(), slice.len()) }
     }
+
+    /// Obtain a flattened slice from a slice of array chunks.
+    #[inline]
+    pub fn slice_as_flattened(slice: &[Self]) -> &[T] {
+        Self::cast_slice_to_core(slice).as_flattened()
+    }
+
+    /// Obtain a mutable flattened slice from a mutable slice of array chunks.
+    #[inline]
+    pub fn slice_as_flattened_mut(slice: &mut [Self]) -> &mut [T] {
+        Self::cast_slice_to_core_mut(slice).as_flattened_mut()
+    }
 }
 
 impl<T, U> Array<MaybeUninit<T>, U>

From 6e38633a3fde9a165043144ba73a34daa7ae0201 Mon Sep 17 00:00:00 2001
From: Tony Arcieri <bascule@gmail.com>
Date: Sun, 21 Sep 2025 13:07:55 -0600
Subject: [PATCH 2/2] v0.4.2 (#143)

### Added
- `Array::slice_as_flattened(_mut)` (#142)
---
 CHANGELOG.md | 6 ++++++
 Cargo.lock   | 2 +-
 Cargo.toml   | 2 +-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index ef544e1..fd54447 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 0.4.2 (2025-09-21)
+### Added
+- `Array::slice_as_flattened(_mut)` ([#142])
+
+[#142]: https://github.com/RustCrypto/hybrid-array/pull/142
+
 ## 0.4.1 (2025-09-10)
 ### Changed
 - Make slice conversions `const fn` ([#140])
diff --git a/Cargo.lock b/Cargo.lock
index 9adbdf3..16acac5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -30,7 +30,7 @@ checksum = "b6b1fc10dbac614ebc03540c9dbd60e83887fda27794998c6528f1782047d540"
 
 [[package]]
 name = "hybrid-array"
-version = "0.4.1"
+version = "0.4.2"
 dependencies = [
  "bincode",
  "bytemuck",
diff --git a/Cargo.toml b/Cargo.toml
index c483716..b42cfef 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "hybrid-array"
-version = "0.4.1"
+version = "0.4.2"
 description = """
 Hybrid typenum-based and const generic array types designed to provide the
 flexibility of typenum-based expressions while also allowing interoperability