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macro_rules! enum_count {
() => {0};
($_head:ident $(, $tail:ident)*) => {1 + enum_count!($($tail),*)};
}
macro_rules! define_enum_with_values {
(
$(#[$enum_meta:meta])*
@U16
$vis:vis enum $name:ident {
$(
$(#[$variant_meta:meta])*
$variant:ident => $value:expr,
)*
}
) => {
$(#[$enum_meta])*
#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy)]
#[repr(u16)]
$vis enum $name {
$(
$(#[$variant_meta])*
$variant = $value,
)*
/// Unknown or extension setting ID
Unknown(u16),
}
impl $name {
const MAX_ID: u16 = 15;
const DEFAULT_STACK_SIZE: usize = enum_count!($($variant),*);
const DEFAULT_IDS: [$name; Self::DEFAULT_STACK_SIZE] = [
$(
$name::$variant,
)*
];
fn mask_id(self) -> u16 {
let value = u16::from(self);
if value == 0 || value > Self::MAX_ID {
return 0;
}
1 << (value - 1)
}
}
impl From<$name> for u16 {
fn from(src: $name) -> u16 {
match src {
$(
$name::$variant => $value,
)*
$name::Unknown(id) => id,
}
}
}
impl From<u16> for $name {
fn from(id: u16) -> $name {
match id {
$(
$value => $name::$variant,
)*
_ => $name::Unknown(id),
}
}
}
};
(
$(#[$enum_meta:meta])*
@U8
$vis:vis enum $name:ident {
$(
$(#[$variant_meta:meta])*
$variant:ident => $value:expr,
)*
}
) => {
$(#[$enum_meta])*
#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy)]
#[repr(u8)]
$vis enum $name {
$(
$(#[$variant_meta])*
$variant = $value,
)*
}
impl $name {
const MAX_ID: u8 = 7;
const DEFAULT_STACK_SIZE: usize = enum_count!($($variant),*);
const DEFAULT_IDS: [$name; Self::DEFAULT_STACK_SIZE] = [
$(
$name::$variant,
)*
];
fn mask_id(self) -> u8 {
let value = u8::from(self);
if value == 0 || value > Self::MAX_ID {
return 0;
}
1 << (value - 1)
}
}
impl From<$name> for u8 {
fn from(src: $name) -> u8 {
match src {
$(
$name::$variant => $value,
)*
}
}
}
};
}