Struct BitPos
#[repr(transparent)]pub struct BitPos<R = usize>where
R: BitRegister,{
pos: u8,
_ty: PhantomData<R>,
}
Expand description
§Bit Position
This is a position counter of a real bit in an R
memory element.
Like BitIdx
, it is a counter in the ring 0 .. R::BITS
. It marks a real bit
in memory, and is the shift distance in the expression 1 << n
. It can only be
produced by applying BitOrder::at
to an existing BitIdx
produced by
bitvec
.
§Type Parameters
R
: The register element that this position governs.
§Validity
Values of this type are required to be in the range 0 .. R::BITS
. Any
value not less than R::BITS
makes the program invalid, and will likely cause
either a crash or incorrect memory access.
§Construction
This type is publicly constructible, but is only correct to do so within an
implementation of BitOrder::at
. bitvec
will only request its creation
through that trait implementation, and has no sites that can publicly accept
untrusted values.
Fields§
§pos: u8
§_ty: PhantomData<R>
Implementations§
§impl<R> BitPos<R>where
R: BitRegister,
impl<R> BitPos<R>where
R: BitRegister,
pub unsafe fn new_unchecked(pos: u8) -> BitPos<R>
pub unsafe fn new_unchecked(pos: u8) -> BitPos<R>
Wraps a counter value as an assumed-good position within an R
register.
§Parameters
value
: The counter value to mark as a position. This must be in the range0 .. R::BITS
.
§Returns
This unconditionally marks pos
as a valid bit-position.
§Safety
If the pos
value is outside the valid range, then the program is
incorrect. Debug builds will panic; release builds do not inspect the
value or specify a behavior.
pub fn into_inner(self) -> u8
Available on non-tarpaulin_include
only.
pub fn into_inner(self) -> u8
tarpaulin_include
only.Removes the position wrapper, leaving the internal counter.
pub fn select(self) -> BitSel<R>
pub fn select(self) -> BitSel<R>
Computes the bit selector corresponding to self
.
This is always 1 << self.pos
.
pub fn mask(self) -> BitMask<R>
Available on non-tarpaulin_include
only.
pub fn mask(self) -> BitMask<R>
tarpaulin_include
only.Computes the bit selector for self
as an accessor mask.
This is a type-cast over Self::select
.
Trait Implementations§
§impl<R> Binary for BitPos<R>where
R: BitRegister,
impl<R> Binary for BitPos<R>where
R: BitRegister,
§impl<R> Clone for BitPos<R>where
R: Clone + BitRegister,
impl<R> Clone for BitPos<R>where
R: Clone + BitRegister,
§impl<R> Debug for BitPos<R>where
R: BitRegister,
impl<R> Debug for BitPos<R>where
R: BitRegister,
§impl<R> Default for BitPos<R>where
R: Default + BitRegister,
impl<R> Default for BitPos<R>where
R: Default + BitRegister,
§impl<R> Display for BitPos<R>where
R: BitRegister,
impl<R> Display for BitPos<R>where
R: BitRegister,
§impl<R> Hash for BitPos<R>where
R: Hash + BitRegister,
impl<R> Hash for BitPos<R>where
R: Hash + BitRegister,
§impl<R> Ord for BitPos<R>where
R: Ord + BitRegister,
impl<R> Ord for BitPos<R>where
R: Ord + BitRegister,
§impl<R> PartialEq for BitPos<R>where
R: PartialEq + BitRegister,
impl<R> PartialEq for BitPos<R>where
R: PartialEq + BitRegister,
§impl<R> PartialOrd for BitPos<R>where
R: PartialOrd + BitRegister,
impl<R> PartialOrd for BitPos<R>where
R: PartialOrd + BitRegister,
impl<R> Copy for BitPos<R>where
R: Copy + BitRegister,
impl<R> Eq for BitPos<R>where
R: Eq + BitRegister,
impl<R> StructuralPartialEq for BitPos<R>where
R: BitRegister,
Auto Trait Implementations§
impl<R> Freeze for BitPos<R>
impl<R> RefUnwindSafe for BitPos<R>where
R: RefUnwindSafe,
impl<R> Send for BitPos<R>
impl<R> Sync for BitPos<R>
impl<R> Unpin for BitPos<R>
impl<R> UnwindSafe for BitPos<R>where
R: UnwindSafe,
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Size: 1 byte