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|
//! Mask types
macro_rules! impl_mask_ty {
($id:ident : $elem_ty:ident | #[$doc:meta]) => {
#[$doc]
#[derive(Copy, Clone)]
pub struct $id($elem_ty);
impl crate::sealed::Seal for $id {}
impl crate::sealed::Mask for $id {
#[inline]
fn test(&self) -> bool {
$id::test(self)
}
}
impl $id {
/// Instantiate a mask with `value`
#[inline]
pub fn new(x: bool) -> Self {
if x {
$id(!0)
} else {
$id(0)
}
}
/// Test if the mask is set
#[inline]
pub fn test(&self) -> bool {
self.0 != 0
}
}
impl Default for $id {
#[inline]
fn default() -> Self {
$id(0)
}
}
#[allow(clippy::partialeq_ne_impl)]
impl PartialEq<$id> for $id {
#[inline]
fn eq(&self, other: &Self) -> bool {
self.0 == other.0
}
#[inline]
fn ne(&self, other: &Self) -> bool {
self.0 != other.0
}
}
impl Eq for $id {}
impl PartialOrd<$id> for $id {
#[inline]
fn partial_cmp(&self, other: &Self) -> Option<crate::cmp::Ordering> {
use crate::cmp::Ordering;
if self == other {
Some(Ordering::Equal)
} else if self.0 > other.0 {
// Note:
// * false = 0_i
// * true == !0_i == -1_i
Some(Ordering::Less)
} else {
Some(Ordering::Greater)
}
}
#[inline]
fn lt(&self, other: &Self) -> bool {
self.0 > other.0
}
#[inline]
fn gt(&self, other: &Self) -> bool {
self.0 < other.0
}
#[inline]
fn le(&self, other: &Self) -> bool {
self.0 >= other.0
}
#[inline]
fn ge(&self, other: &Self) -> bool {
self.0 <= other.0
}
}
impl Ord for $id {
#[inline]
fn cmp(&self, other: &Self) -> crate::cmp::Ordering {
match self.partial_cmp(other) {
Some(x) => x,
None => unsafe { crate::hint::unreachable_unchecked() },
}
}
}
impl crate::hash::Hash for $id {
#[inline]
fn hash<H: crate::hash::Hasher>(&self, state: &mut H) {
(self.0 != 0).hash(state);
}
}
impl crate::fmt::Debug for $id {
#[inline]
fn fmt(&self, fmtter: &mut crate::fmt::Formatter<'_>) -> Result<(), crate::fmt::Error> {
write!(fmtter, "{}({})", stringify!($id), self.0 != 0)
}
}
};
}
impl_mask_ty!(m8: i8 | /// 8-bit wide mask.
);
impl_mask_ty!(m16: i16 | /// 16-bit wide mask.
);
impl_mask_ty!(m32: i32 | /// 32-bit wide mask.
);
impl_mask_ty!(m64: i64 | /// 64-bit wide mask.
);
impl_mask_ty!(m128: i128 | /// 128-bit wide mask.
);
impl_mask_ty!(msize: isize | /// isize-wide mask.
);
|
