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// SPDX-License-Identifier: GPL-2.0
//! Additional numerical features for the kernel.
use core::ops;
pub mod bounded;
pub use bounded::*;
/// Designates unsigned primitive types.
pub enum Unsigned {}
/// Designates signed primitive types.
pub enum Signed {}
/// Describes core properties of integer types.
pub trait Integer:
Sized
+ Copy
+ Clone
+ PartialEq
+ Eq
+ PartialOrd
+ Ord
+ ops::Add<Output = Self>
+ ops::AddAssign
+ ops::Sub<Output = Self>
+ ops::SubAssign
+ ops::Mul<Output = Self>
+ ops::MulAssign
+ ops::Div<Output = Self>
+ ops::DivAssign
+ ops::Rem<Output = Self>
+ ops::RemAssign
+ ops::BitAnd<Output = Self>
+ ops::BitAndAssign
+ ops::BitOr<Output = Self>
+ ops::BitOrAssign
+ ops::BitXor<Output = Self>
+ ops::BitXorAssign
+ ops::Shl<u32, Output = Self>
+ ops::ShlAssign<u32>
+ ops::Shr<u32, Output = Self>
+ ops::ShrAssign<u32>
+ ops::Not
{
/// Whether this type is [`Signed`] or [`Unsigned`].
type Signedness;
/// Number of bits used for value representation.
const BITS: u32;
}
macro_rules! impl_integer {
($($type:ty: $signedness:ty), *) => {
$(
impl Integer for $type {
type Signedness = $signedness;
const BITS: u32 = <$type>::BITS;
}
)*
};
}
impl_integer!(
u8: Unsigned,
u16: Unsigned,
u32: Unsigned,
u64: Unsigned,
u128: Unsigned,
usize: Unsigned,
i8: Signed,
i16: Signed,
i32: Signed,
i64: Signed,
i128: Signed,
isize: Signed
);
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