Merge pull request #122 from quartiq/rj/transparent

repr(transparent) for option and array

CHANGELOG.md

@@ -4,6 +4,10 @@ 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).
 
+## [Unreleased](https://github.com/quartiq/miniconf/compare/v0.6.2...HEAD)
+
+* `Array` and `Option` are `repr(transparent)`
+
 ## [0.6.2](https://github.com/quartiq/miniconf/compare/v0.6.1...v0.6.2) - 2022-11-09
 
 * Renaming and reorganization of the the derive macro

src/array.rs

@@ -25,6 +25,7 @@ use core::ops::{Deref, DerefMut};
 /// An `Array` can be constructed using [`From<[T; N]>`](From)/[`Into<miniconf::Array>`]
 /// and the contained value can be accessed through [`Deref`]/[`DerefMut`].
 #[derive(Clone, Copy, PartialEq, Eq, Debug, PartialOrd, Ord, Hash)]
+#[repr(transparent)]
 pub struct Array<T, const N: usize>([T; N]);
 
 impl<T, const N: usize> Deref for Array<T, N> {

src/option.rs

@@ -42,6 +42,7 @@ use core::ops::{Deref, DerefMut};
     serde::Serialize,
     serde::Deserialize,
 )]
+#[repr(transparent)]
 pub struct Option<T>(core::option::Option<T>);
 
 impl<T> Deref for Option<T> {