pub struct BitSel<R = usize>where
R: BitRegister,{ /* private fields */ }
Expand description
§One-Hot Bit Selection Mask
This type selects exactly one bit in a register. It is a BitPos
shifted from
a counter to a selector, and is used to apply test and write operations to real
memory.
§Type Parameters
R
: The register element this selector governs.
§Validity
Values of this type are required to have exactly one bit set and all others cleared. Any other value makes the program incorrect, and will cause memory corruption.
§Construction
This type is only constructed from BitPos
, and is always equivalent to
1 << BitPos
.
The chain of custody from known-good BitIdx
values, through proven-good
BitOrder
implementations, into BitPos
and then BitSel
proves that values
of this type are always correct to apply to real memory.
Implementations§
source§impl<R> BitSel<R>where
R: BitRegister,
impl<R> BitSel<R>where
R: BitRegister,
sourcepub unsafe fn new_unchecked(sel: R) -> Self
pub unsafe fn new_unchecked(sel: R) -> Self
Wraps a selector value as an assumed-good selection in an R
register.
§Parameters
sel
: A one-hot selection mask of a bit in anR
register.
§Returns
This unconditionally marks sel
as a one-hot bit selector.
§Safety
If the sel
value has zero or multiple bits set, then it is invalid to
be used as a BitSel
and the program is incorrect. Debug builds will
panic; release builds do not inspect the value or specify a behavior.
sourcepub fn into_inner(self) -> R
pub fn into_inner(self) -> R
Removes the one-hot selection wrapper, leaving the internal mask.
sourcepub fn range_all() -> impl Iterator<Item = Self> + DoubleEndedIterator + ExactSizeIterator + FusedIterator
pub fn range_all() -> impl Iterator<Item = Self> + DoubleEndedIterator + ExactSizeIterator + FusedIterator
Iterates over all possible selector values.
Trait Implementations§
source§impl<R> Binary for BitSel<R>where
R: BitRegister,
impl<R> Binary for BitSel<R>where
R: BitRegister,
source§impl<R> Debug for BitSel<R>where
R: BitRegister,
impl<R> Debug for BitSel<R>where
R: BitRegister,
source§impl<R> Display for BitSel<R>where
R: BitRegister,
impl<R> Display for BitSel<R>where
R: BitRegister,
source§impl<R> Ord for BitSel<R>where
R: BitRegister + Ord,
impl<R> Ord for BitSel<R>where
R: BitRegister + Ord,
source§impl<R> PartialOrd for BitSel<R>where
R: BitRegister + PartialOrd,
impl<R> PartialOrd for BitSel<R>where
R: BitRegister + PartialOrd,
impl<R> Copy for BitSel<R>where
R: BitRegister + Copy,
impl<R> Eq for BitSel<R>where
R: BitRegister + Eq,
impl<R> StructuralPartialEq for BitSel<R>where
R: BitRegister,
Auto Trait Implementations§
impl<R> Freeze for BitSel<R>where
R: Freeze,
impl<R> RefUnwindSafe for BitSel<R>where
R: RefUnwindSafe,
impl<R> Send for BitSel<R>
impl<R> Sync for BitSel<R>
impl<R> Unpin for BitSel<R>
impl<R> UnwindSafe for BitSel<R>where
R: UnwindSafe,
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T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
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fn borrow_mut(&mut self) -> &mut T
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default unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
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