1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36

/*
 * SPDX-FileCopyrightText: 2023 Tommaso Fontana
 * SPDX-FileCopyrightText: 2023 Inria
 * SPDX-FileCopyrightText: 2023 Sebastiano Vigna
 *
 * SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later
 */

/// Inner private trait used to make implementing [`Endianness`]
/// impossible for other structs.
mod private {
    /// This is a [SealedTrait](https://predr.ag/blog/definitive-guide-to-sealed-traits-in-rust/).
    pub trait Endianness {}
}

impl<T: private::Endianness> Endianness for T {}

/// Marker trait satisfied only by [`LittleEndian`] or [`BigEndian`]
pub trait Endianness: private::Endianness {}

/// Marker struct for little-endian streams.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct LittleEndian;

/// Marker struct for big-endian streams.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct BigEndian;

/// Alias for [`BigEndian`]
pub type BE = BigEndian;

/// Alias for [`LittleEndian`]
pub type LE = LittleEndian;

impl private::Endianness for LittleEndian {}
impl private::Endianness for BigEndian {}