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// Copyright 2019 Robin Krahl <robin.krahl@ireas.org>
// SPDX-License-Identifier: GPL-3.0-or-later
use core::marker::Sized;
macro_rules! enum_cmd {
(
$(#[$outer:meta])*
pub enum $name:ident {
$($var:ident($cmd:ident) = $num:expr),+
$(,)*
}
) => {
enum_u8! {
$(#[$outer])*
pub enum $name {
$(
$var = $num,
)*
}
}
impl $name {
pub fn execute(&self, data: &[u8], buf: &mut [u8]) -> CommandStatus {
match *self {
$(
$name::$var => crate::commands::execute::<$cmd>(data, buf),
)*
}
}
}
};
}
macro_rules! enum_u8 {
(
$(#[$outer:meta])*
pub enum $name:ident {
$($var:ident = $num:expr),+
$(,)*
}
) => {
$(#[$outer])*
#[repr(u8)]
pub enum $name {
$(
$var = $num,
)*
}
impl crate::util::TryFrom<u8> for $name {
fn try_from(val: u8) -> ::core::result::Result<Self, ()> {
match val {
$(
$num => Ok($name::$var),
)*
_ => Err(())
}
}
}
impl From<$name> for u8 {
fn from(val: $name) -> u8 {
val as u8
}
}
};
}
pub trait TryFrom<T>: Sized {
fn try_from(val: T) -> Result<Self, ()>;
}
|
