Enum TinyBitVec

pub enum TinyBitVec<Bits = [u16; 14], O = Local>
where
    O: BitOrder,
    Bits: AsBits + Default,
{
    Inline(ArrayBitVec<Bits, O>),
    Heap(BitVec<O, Bits::Store>),
}

Variants

Inline(ArrayBitVec<Bits, O>)

Heap(BitVec<O, Bits::Store>)

Implementations

impl<Bits, O> TinyBitVec<Bits, O>

where O: BitOrder, Bits: AsBits + Default,

pub fn is_empty(&self) -> bool

pub fn clear(&mut self)

pub fn into_vec(self) -> BitVec<O, Bits::Store>

pub fn move_to_heap_and_reserve(&mut self, n: usize)

pub fn move_to_heap(&mut self)

pub fn append(&mut self, other: &mut Self)

pub fn is_heap(&self) -> bool

pub fn is_inline(&self) -> bool

pub fn push(&mut self, x: bool)

pub fn insert(&mut self, index: usize, x: bool)

pub fn extend_from_slice(&mut self, other: &BitSlice<O, Bits::Store>)

pub fn resize(&mut self, newlen: usize, x: bool)

pub fn reserve(&mut self, n: usize)

pub fn resize_with<F>(&mut self, newlen: usize, f: F)

where F: FnMut() -> bool,

pub fn capacity(&self) -> usize

pub fn len(&self) -> usize

pub fn truncate(&mut self, n: usize)

pub fn pop(&mut self) -> Option<bool>

pub fn swap_remove(&mut self, index: usize) -> bool

pub fn remove(&mut self, index: usize) -> bool

Methods from Deref<Target = BitSlice<O, Bits::Store>>

pub fn set(&mut self, index: usize, value: bool)

Sets the bit value at the given position.

Parameters

• &mut self
• index: The bit index to set. It must be in the domain 0 .. self.len().
• value: The value to be set, true for 1 and false for 0.

Panics

This method panics if index is outside the slice domain.

Examples

use bitvec::prelude::*;

let mut store = 8u8;
let bits = store.bits_mut::<Msb0>();
assert!(!bits[3]);
bits.set(3, true);
assert!(bits[3]);

pub unsafe fn set_unchecked(&mut self, index: usize, value: bool)

Sets a bit at an index, without doing bounds checking.

This is generally not recommended; use with caution! For a safe alternative, see set.

Parameters

• &mut self
• index: The bit index to retrieve. This index is not checked against the length of self.

Effects

The bit at index is set to value.

Safety

This method is not safe. It performs raw pointer arithmetic to seek from the start of the slice to the requested index, and set the bit there. It does not inspect the length of self, and it is free to perform out-of-bounds memory write access.

Use this method only when you have already performed the bounds check, and can guarantee that the call occurs with a safely in-bounds index.

Examples

This example uses a bit slice of length 2, and demonstrates out-of-bounds access to the last bit in the element.

use bitvec::prelude::*;

let mut src = 0u8;
{
 let bits = &mut src.bits_mut::<Msb0>()[2 .. 4];
 assert_eq!(bits.len(), 2);
 unsafe { bits.set_unchecked(5, true); }
}
assert_eq!(src, 1);

pub fn at<'a, I>(&'a mut self, index: I) -> <I as BitSliceIndex<'a, O, T>>::Mut

where I: BitSliceIndex<'a, O, T>,

👎Deprecated since 0.18.0: Use .get_mut() instead

Produces a write reference to a region of the slice.

This method corresponds to [Index::index], except that it produces a writable reference rather than a read-only reference. See BitSliceIndex for the possible types of the produced reference.

Use of this method locks the &mut BitSlice for the duration of the produced reference’s lifetime. If you need multiple non-overlapping write references into a single source &mut BitSlice, see the ::split_at_mut method.

Lifetimes

• 'a: Propagates the lifetime of the referent slice to the interior reference produced.

Parameters

• &mut self
• index: Some value whose type can be used to index BitSlices.

Returns

A writable reference into self, whose exact type is determined by index’s implementation of BitSliceIndex. This may be either a smaller &mut BitSlice when index is a range, or a BitMut proxy type when index is a usize. See the BitMut documentation for information on how to use it.

Panics

This panics if index is out of bounds of self.

Examples

use bitvec::prelude::*;

let mut src = 0u8;
let bits = src.bits_mut::<Msb0>();

assert!(!bits[0]);
*bits.at(0) = true;
//  note the leading dereference.
assert!(bits[0]);

This example shows multiple usage by using split_at_mut.

use bitvec::prelude::*;

let mut src = 0u8;
let bits = src.bits_mut::<Msb0>();

{
 let (mut a, rest) = bits.split_at_mut(2);
 let (mut b, rest) = rest.split_at_mut(3);
 *a.at(0) = true;
 *b.at(0) = true;
 *rest.at(0) = true;
}

assert_eq!(bits.as_slice()[0], 0b1010_0100);
//                               a b   rest

The above example splits the slice into three (the first, the second, and the rest) in order to hold multiple write references into the slice.

pub unsafe fn at_unchecked<'a, I>( &'a mut self, index: I, ) -> <I as BitSliceIndex<'a, O, T>>::Mut

where I: BitSliceIndex<'a, O, T>,

👎Deprecated since 0.18.0: Use .get_unchecked_mut() instead

Version of at that does not perform boundary checking.

Safety

If index is outside the boundaries of self, then this function will induce safety violations. The caller must ensure that index is within the boundaries of self before calling.

pub unsafe fn split_at_unchecked( &self, mid: usize, ) -> (&BitSlice<O, T>, &BitSlice<O, T>)

Version of split_at that does not perform boundary checking.

Safety

If mid is outside the boundaries of self, then this function will induce safety violations. The caller must ensure that mid is within the boundaries of self before calling.

pub unsafe fn split_at_mut_unchecked( &mut self, mid: usize, ) -> (&mut BitSlice<O, T>, &mut BitSlice<O, T>)

Version of split_at_mut that does not perform boundary checking.

Safety

If mid is outside the boundaries of self, then this function will induce safety violations. The caller must ensure that mid is within the boundaries of self before calling.

pub unsafe fn swap_unchecked(&mut self, a: usize, b: usize)

Version of swap that does not perform boundary checks.

Safety

a and b must be within the bounds of self, otherwise, the memory access is unsound and may induce undefined behavior.

pub fn all(&self) -> bool

Tests if all bits in the slice domain are set (logical ∧).

Truth Table

0 0 => 0
0 1 => 0
1 0 => 0
1 1 => 1

Parameters

• &self

Returns

Whether all bits in the slice domain are set. The empty slice returns true.

Examples

use bitvec::prelude::*;

let bits = 0xFDu8.bits::<Msb0>();
assert!(bits[.. 4].all());
assert!(!bits[4 ..].all());

pub fn any(&self) -> bool

Tests if any bit in the slice is set (logical ∨).

Truth Table

0 0 => 0
0 1 => 1
1 0 => 1
1 1 => 1

Parameters

• &self

Returns

Whether any bit in the slice domain is set. The empty slice returns false.

Examples

use bitvec::prelude::*;

let bits = 0x40u8.bits::<Msb0>();
assert!(bits[.. 4].any());
assert!(!bits[4 ..].any());

pub fn not_all(&self) -> bool

Tests if any bit in the slice is unset (logical ¬∧).

Truth Table

0 0 => 1
0 1 => 1
1 0 => 1
1 1 => 0

Parameters

• `&self

Returns

Whether any bit in the slice domain is unset.

Examples

use bitvec::prelude::*;

let bits = 0xFDu8.bits::<Msb0>();
assert!(!bits[.. 4].not_all());
assert!(bits[4 ..].not_all());

pub fn not_any(&self) -> bool

Tests if all bits in the slice are unset (logical ¬∨).

Truth Table

0 0 => 1
0 1 => 0
1 0 => 0
1 1 => 0

Parameters

• &self

Returns

Whether all bits in the slice domain are unset.

Examples

use bitvec::prelude::*;

let bits = 0x40u8.bits::<Msb0>();
assert!(!bits[.. 4].not_any());
assert!(bits[4 ..].not_any());

pub fn some(&self) -> bool

Tests whether the slice has some, but not all, bits set and some, but not all, bits unset.

This is false if either all() or not_any() are true.

Truth Table

0 0 => 0
0 1 => 1
1 0 => 1
1 1 => 0

Parameters

• &self

Returns

Whether the slice domain has mixed content. The empty slice returns false.

Examples

use bitvec::prelude::*;

let bits = 0b111_000_10u8.bits::<Msb0>();
assert!(!bits[0 .. 3].some());
assert!(!bits[3 .. 6].some());
assert!(bits[6 ..].some());

pub fn count_ones(&self) -> usize

Counts how many bits are set high.

Parameters

• &self

Returns

The number of high bits in the slice domain.

Examples

use bitvec::prelude::*;

let bits = [0xFDu8, 0x25].bits::<Msb0>();
assert_eq!(bits.count_ones(), 10);

pub fn count_zeros(&self) -> usize

Counts how many bits are set low.

Parameters

• &self

Returns

The number of low bits in the slice domain.

Examples

use bitvec::prelude::*;

let bits = [0xFDu8, 0x25].bits::<Msb0>();
assert_eq!(bits.count_zeros(), 6);

pub fn set_all(&mut self, value: bool)

Set all bits in the slice to a value.

Parameters

• &mut self
• value: The bit value to which all bits in the slice will be set.

Examples

use bitvec::prelude::*;

let mut src = 0u8;
let bits = src.bits_mut::<Msb0>();
bits[2 .. 6].set_all(true);
assert_eq!(bits.as_ref(), &[0b0011_1100]);
bits[3 .. 5].set_all(false);
assert_eq!(bits.as_ref(), &[0b0010_0100]);
bits[.. 1].set_all(true);
assert_eq!(bits.as_ref(), &[0b1010_0100]);

pub fn for_each<F>(&mut self, func: F)

where F: Fn(usize, bool) -> bool,

Provides mutable traversal of the collection.

It is impossible to implement IndexMut on BitSlice, because bits do not have addresses, so there can be no &mut u1. This method allows the client to receive an enumerated bit, and provide a new bit to set at each index.

Parameters

• &mut self
• func: A function which receives a (usize, bool) pair of index and value, and returns a bool. It receives the bit at each position, and the return value is written back at that position.

Examples

use bitvec::prelude::*;

let mut src = 0u8;
{
 let bits = src.bits_mut::<Msb0>();
 bits.for_each(|idx, _bit| idx % 3 == 0);
}
assert_eq!(src, 0b1001_0010);

pub fn add_assign_reverse<I>(&mut self, addend: I) -> bool

where I: IntoIterator<Item = bool>,

Performs “reverse” addition (left to right instead of right to left).

This addition interprets the slice, and the other addend, as having its least significant bits first in the order and its most significant bits last. This is most likely to be numerically useful under a Lsb0 BitOrder type.

Parameters

• &mut self: The addition uses self as one addend, and writes the sum back into self.
• addend: impl IntoIterator<Item=bool>: A stream of bits. When this is another BitSlice, iteration proceeds from left to right.

Return

The final carry bit is returned

Effects

Starting from index 0 and proceeding upwards until either self or addend expires, the carry-propagated addition of self[i] and addend[i] is written to self[i].

  101111
+ 0010__ (the two missing bits are logically zero)
--------
  100000 1 (the carry-out is returned)

Examples

use bitvec::prelude::*;

let mut a = 0b0000_1010u8;
let     b = 0b0000_1100u8;
//      s =      1 0110
let ab = &mut a.bits_mut::<Lsb0>()[.. 4];
let bb = &    b.bits::<Lsb0>()[.. 4];
let c = ab.add_assign_reverse(bb.iter().copied());
assert!(c);
assert_eq!(a, 0b0000_0110u8);

Performance Notes

When using Lsb0 BitOrder types, this can be accelerated by delegating the addition to the underlying types. This is a software implementation of the ripple-carry adder, which has O(n) runtime in the number of bits. The CPU is much faster, as it has access to element-wise or vectorized addition operations.

If your use case sincerely needs binary-integer arithmetic operations on bit sets, please file an issue.

pub fn as_slice(&self) -> &[T]

Accesses the backing storage of the BitSlice as a slice of its elements.

This will not include partially-owned edge elements, as they may be contended by other slice handles.

Parameters

• &self

Returns

A slice of all the elements that the BitSlice uses for storage.

Examples

use bitvec::prelude::*;

let src = [1u8, 66];
let bits = src.bits::<Msb0>();

let accum = bits.as_slice()
  .iter()
  .map(|elt| elt.count_ones())
  .sum::<u32>();
assert_eq!(accum, 3);

pub fn as_mut_slice(&mut self) -> &mut [T]

Accesses the underlying store.

This will not include partially-owned edge elements, as they may be contended by other slice handles.

Examples

use bitvec::prelude::*;

let mut src = [1u8, 64];
let bits = src.bits_mut::<Msb0>();
for elt in bits.as_mut_slice() {
  *elt |= 2;
}
assert_eq!(&[3, 66], bits.as_slice());

pub fn as_total_slice(&self) -> &[<T as BitStore>::Access]

Accesses the underlying store, including contended partial elements.

This produces a slice of element wrappers that permit shared mutation, rather than a slice of the bare T fundamentals.

Parameters

• &self

Returns

A slice of all elements under the bit span, including any partially-owned edge elements, wrapped in safe shared-mutation types.

pub fn len(&self) -> usize

Returns the number of bits in the slice.

Original

slice::len

Examples

let bits = 0u8.bits::<Local>();
assert_eq!(bits.len(), 8);

pub fn is_empty(&self) -> bool

Returns true if the slice has a length of 0.

Original

slice::is_empty

Examples

let bits = 0u8.bits::<Local>();
assert!(!bits.is_empty());

assert!(BitSlice::<Local, usize>::empty().is_empty())

pub fn first(&self) -> Option<&bool>

Returns the first bit of the slice, or None if it is empty.

Original

slice::first

Examples

let bits = 1u8.bits::<Lsb0>();
assert_eq!(bits.first(), Some(&true));

assert!(BitSlice::<Local, usize>::empty().first().is_none());

pub fn first_mut(&mut self) -> Option<BitMut<'_, O, T>>

Returns a mutable pointer to the first bit of the slice, or None if it is empty.

Original

slice::first_mut

Examples

let mut data = 0u8;
let bits = data.bits_mut::<Lsb0>();
if let Some(mut first) = bits.first_mut() {
    *first = true;
}
assert_eq!(data, 1u8);

pub fn split_first(&self) -> Option<(&bool, &BitSlice<O, T>)>

Returns the first and all the rest of the bits of the slice, or None if it is empty.

Examples

let bits = 1u8.bits::<Lsb0>();
if let Some((first, rest)) = bits.split_first() {
    assert_eq!(first, &true);
    assert_eq!(rest, &bits[1 ..]);
}

pub fn split_first_mut( &mut self, ) -> Option<(BitMut<'_, O, T>, &mut BitSlice<O, T>)>

Returns the first and all the rest of the bits of the slice, or None if it is empty.

Examples

let mut data = 0u8;
let bits = data.bits_mut::<Lsb0>();
if let Some((mut first, rest)) = bits.split_first_mut() {
    *first = true;
    *rest.at(0) = true;
    *rest.at(1) = true;
}
assert_eq!(data, 7);

pub fn split_last(&self) -> Option<(&bool, &BitSlice<O, T>)>

Returns the last and all the rest of the bits of the slice, or None if it is empty.

Examples

let bits = 1u8.bits::<Msb0>();
if let Some((last, rest)) = bits.split_last() {
    assert_eq!(last, &true);
    assert_eq!(rest, &bits[.. 7]);
}

pub fn split_last_mut( &mut self, ) -> Option<(BitMut<'_, O, T>, &mut BitSlice<O, T>)>

Returns the last and all the rest of the bits of the slice, or None if it is empty.

Examples

let mut data = 0u8;
let bits = data.bits_mut::<Msb0>();
if let Some((mut last, rest)) = bits.split_last_mut() {
    *last = true;
    *rest.at(0) = true;
    *rest.at(1) = true;
}
assert_eq!(data, 128 | 64 | 1);

pub fn last(&self) -> Option<&bool>

Returns the last bit of the slice, or None if it is empty.

Examples

let bits = 1u8.bits::<Msb0>();
assert_eq!(Some(&true), bits.last());
assert!(BitSlice::<Local, usize>::empty().last().is_none());

pub fn last_mut(&mut self) -> Option<BitMut<'_, O, T>>

Returns a mutable pointer to the last bit in the slice.

Examples

let mut data = 0u8;
let bits = data.bits_mut::<Msb0>();
if let Some(mut last) = bits.last_mut() {
    *last = true;
}
assert!(bits[7]);

pub fn get<'a, I>( &'a self, index: I, ) -> Option<<I as BitSliceIndex<'a, O, T>>::Immut>

where I: BitSliceIndex<'a, O, T>,

Returns a reference to a bit or subslice depending on the type of index.

• If given a position, returns a reference to the bit at that position or None if out of bounds.
• If given a range, returns the subslice corresponding to that range, or None if out of bounds.

Examples

let data = 1u8;
let bits = data.bits::<Lsb0>();
assert_eq!(Some(&true), bits.get(0));
assert!(bits.get(8).is_none());
assert!(bits.get(1 ..).expect("in bounds").not_any());
assert!(bits.get(.. 12).is_none());

pub fn get_mut<'a, I>( &'a mut self, index: I, ) -> Option<<I as BitSliceIndex<'a, O, T>>::Mut>

where I: BitSliceIndex<'a, O, T>,

Returns a mutable reference to a bit or subslice depending on the type of index (see get) or None if the index is out of bounds.

Examples

let mut data = 0u8;
let bits = data.bits_mut::<Lsb0>();
if let Some(mut bit) = bits.get_mut(1) {
    *bit = true;
}
if let Some(bits) = bits.get_mut(5 .. 7) {
    bits.set_all(true);
}
assert_eq!(data, 64 | 32 | 2);

pub unsafe fn get_unchecked<'a, I>( &'a self, index: I, ) -> <I as BitSliceIndex<'a, O, T>>::Immut

where I: BitSliceIndex<'a, O, T>,

Returns a reference to a bit or subslice, without doing bounds checking.

This is generally not recommended; use with caution! For a safe alternative, see get.

Safety

As this function does not perform boundary checking, the caller must ensure that self is an index within the boundaries of slice before calling in order to avoid boundary escapes and ensuing safety violations.

Examples

let data = 4u8;
let bits = data.bits::<Lsb0>();
unsafe {
    assert!(bits.get_unchecked(2));
    assert!(!bits.get_unchecked(1));
}

pub unsafe fn get_unchecked_mut<'a, I>( &'a mut self, index: I, ) -> <I as BitSliceIndex<'a, O, T>>::Mut

where I: BitSliceIndex<'a, O, T>,

Returns a mutable reference to a bit or subslice, without doing bounds checking.

This is generally not recommended; use with caution! For a safe alternative, see get_mut.

Safety

As this function does not perform boundary checking, the caller must ensure that self is an index within the boundaries of slice before calling in order to avoid boundary escapes and ensuing safety violations.

Examples

let mut data = 0u8;
let bits = data.bits_mut::<Msb0>();
unsafe {
    let mut bit = bits.get_unchecked_mut(0);
    *bit = true;
    drop(bit); // release the borrow immediately
    let bits = bits.get_unchecked_mut(6 ..);
    bits.set_all(true);
}
assert_eq!(data, 1 | 2 | 128);

pub fn as_ptr(&self) -> *const T

Returns a raw pointer to the slice’s buffer.

The caller must ensure that the slice outlives the pointer this function returns, or else it will end up pointing to garbage.

The caller must also ensure that the memory the pointer (non-transitively) points to is never written to (except inside an UnsafeCell) using this pointer or any pointer derived from it. If you need to mutate the contents of the buffer, use as_mut_ptr.

Modifying the container referenced by this slice may cause its buffer to be reallocated, which would also make any pointers to it invalid.

Notes

This pointer is always to the first T element in the backing storage, even if that element is only partially used by the self slice. Multiple separate BitSlice handles may produce the same pointer with this method.

Examples

let data = [0u8; 2];
let bits = data.bits::<Msb0>();
let (head, rest) = bits.split_at(4);
assert_eq!(head.as_ptr(), rest.as_ptr());

pub fn as_mut_ptr(&mut self) -> *mut T

Returns an unsafe mutable pointer to the slice’s buffer.

The caller must ensure thath the slice outlives the pointer this function returns, or else it will end up pointing to garbage.

Modifying the container referenced by this slice may couse its buffer to be reallocated, which would also make any pointers to it invalid.

Notes

This pointer is always to the first T element in the backing storage, even if that element is only partially used by the self slice. Multiple separate BitSlice handles may produce the same pointer with this method.

Examples

let mut data = [0u8; 2];
let bits = data.bits_mut::<Msb0>();
let (head, rest) = bits.split_at_mut(4);
assert_eq!(head.as_mut_ptr(), rest.as_mut_ptr());
unsafe { *head.as_mut_ptr() = 2; }
assert!(rest[2]);

pub fn swap(&mut self, a: usize, b: usize)

Swaps two bits in the slice.

Arguments

• a: The index of the first bit
• b: The index of the second bit

Panics

Panics if a or b are out of bounds.

Examples

let mut data = 2u8;
let bits = data.bits_mut::<Lsb0>();
bits.swap(0, 1);
assert_eq!(data, 1);

pub fn reverse(&mut self)

Reverses the order of bits in the slice, in place.

Examples

use bitvec::prelude::*;
let mut data = 0b1_1001100u8;
let bits = data.bits_mut::<Msb0>();
bits[1 ..].reverse();
assert_eq!(data, 0b1_0011001);

pub fn iter(&self) -> Iter<'_, O, T>

Returns an iterator over the slice.

Examples

let data = 3u8;
let bits = data.bits::<Lsb0>();
let mut iter = bits[.. 4].iter();
assert_eq!(iter.next(), Some(&true));
assert_eq!(iter.next(), Some(&true));
assert_eq!(iter.next(), Some(&false));
assert_eq!(iter.next(), Some(&false));
assert!(iter.next().is_none());

pub fn iter_mut(&mut self) -> IterMut<'_, O, T>

Returns an iterator that allows modifying each bit.

Examples

let mut data = 0u8;
let bits = &mut data.bits_mut::<Lsb0>()[.. 2];
for mut bit in bits.iter_mut() {
    *bit = true;
}
assert_eq!(data, 3);

pub fn windows(&self, width: usize) -> Windows<'_, O, T>

Returns an iterator over all contiguous windows of width width.

The windows overlap. If the slice is shorter than width, the iterator returns no values.

Panics

Panics if width is 0.

Examples

let data = 0b100_010_01u8;
let bits = data.bits::<Msb0>();
let mut iter = bits[.. 5].windows(3);
assert_eq!(iter.next().unwrap(), &bits[0 .. 3]);
assert_eq!(iter.next().unwrap(), &bits[1 .. 4]);
assert_eq!(iter.next().unwrap(), &bits[2 .. 5]);
assert!(iter.next().is_none());

If the slice is shorter than width:

let data = 0u8;
let bits = data.bits::<Local>();
let mut iter = bits[.. 3].windows(4);
assert!(iter.next().is_none());

pub fn chunks(&self, chunk_size: usize) -> Chunks<'_, O, T>

Returns an iterator over chunk_size bits of the slice at a time, starting at the beginning of the slice.

The chunks are slices and do not overlap. If chunk_size does not divide the length of the slice, then the last chunk will not have length chunk_size.

See chunks_exact for a variant of this iterator that returns chunks of always exactly chunk_size elements, and rchunks for the same iterator but starting at the end of the slice.

Panics

Panics if chunk_size is 0.

Examples

let data = 0b001_010_10u8;
let bits = data.bits::<Msb0>();
let mut iter = bits.chunks(3);
assert_eq!(iter.next().unwrap(), &bits[0 .. 3]);
assert_eq!(iter.next().unwrap(), &bits[3 .. 6]);
assert_eq!(iter.next().unwrap(), &bits[6 .. 8]);
assert!(iter.next().is_none());

pub fn chunks_mut(&mut self, chunk_size: usize) -> ChunksMut<'_, O, T>

Returns an iterator over chunk_size bits of the slice at a time, starting at the beginning of the slice.

The chunks are mutable slices, and do not overlap. If chunk_size does not divide the length of the slice, then the last chunk will not have length chunk_size.

See chunks_exact_mut for a variant of this iterator that returns chunks of always exactly chunk_size bits, and rchunks_mut for the same iterator but starting at the end of the slice.

Panics

Panics if chunk_size is 0.

Examples

let mut data = 0u8;
let bits = data.bits_mut::<Msb0>();
let mut count = 0;

for chunk in bits.chunks_mut(3) {
    chunk.store(4u8 >> count);
    count += 1;
}
assert_eq!(count, 3);
assert_eq!(data, 0b100_010_01);

pub fn chunks_exact(&self, chunk_size: usize) -> ChunksExact<'_, O, T>

Returns an iterator over chunk_size elements of the slice at a time, starting at the beginning of the slice.

The chunks are slices and do not overlap. If chunk_size does not divide the length of the slice, then the last up to chunk_size - 1 elements will be omitted and can be retrieved from the remainder function of the iterator.

Due to each chunk having exactly chunk_size elements, the compiler can often optimize the resulting code better than in the case of chunks.

See chunks for a variant of this iterator that also returns the remainder as a smaller chunk, and rchunks_exact for the same iterator but starting at the end of the slice.

Panics

Panics if chunk_size is 0.

Examples

let data = 0b100_010_01u8;
let bits = data.bits::<Msb0>();
let mut iter = bits.chunks_exact(3);
assert_eq!(iter.next().unwrap(), &bits[0 .. 3]);
assert_eq!(iter.next().unwrap(), &bits[3 .. 6]);
assert!(iter.next().is_none());
assert_eq!(iter.remainder(), &bits[6 .. 8]);

pub fn chunks_exact_mut( &mut self, chunk_size: usize, ) -> ChunksExactMut<'_, O, T>

Returns an iterator over chunk_size elements of the slice at a time, starting at the beginning of the slice.

The chunks are mutable slices, and do not overlap. If chunk_size does not divide the length of the slice, then the last up to chunk_size - 1 elements will be omitted and can be retrieved from the into_remainder function of the iterator.

Due to each chunk having exactly chunk_size elements, the compiler can often optimize the resulting code better than in the case of chunks_mut.

See chunks_mut for a variant of this iterator that also returns the remainder as a smaller chunk, and rchunks_exact_mut for the same iterator but starting at the end of the slice of the slice.

Panics

Panics if chunk_size is 0.

Examples

let mut data = 0u8;
let bits = data.bits_mut::<Msb0>();
let mut count = 0u8;

let mut iter = bits.chunks_exact_mut(3);
for chunk in &mut iter {
    chunk.store(4u8 >> count);
    count += 1;
}
iter.into_remainder().store(1u8);
assert_eq!(count, 2);
assert_eq!(data, 0b100_010_01);

pub fn rchunks(&self, chunk_size: usize) -> RChunks<'_, O, T>

Returns an iterator over chunk_size bits of the slice at a time, starting at the end of the slice.

The chunks are slices and do not overlap. If chunk_size does not divide the length of the slice, then the last chunk will not have length of the slice, then the last chunk will not have length chunk_size.

See rchunks_exact for a variant of this iterator that returns chunks of always exactly chunk_size bits, and chunks for the same iterator but starting at the beginning of the slice.

Panics

Panics if chunk_size is 0.

Examples

let data = 0b01_010_100u8;
let bits = data.bits::<Msb0>();
let mut iter = bits.rchunks(3);
assert_eq!(iter.next().unwrap(), &bits[5 .. 8]);
assert_eq!(iter.next().unwrap(), &bits[2 .. 5]);
assert_eq!(iter.next().unwrap(), &bits[0 .. 2]);
assert!(iter.next().is_none());

pub fn rchunks_mut(&mut self, chunk_size: usize) -> RChunksMut<'_, O, T>

Returns an iterator over chunk_size bits of the slice at a time, starting at the end of the slice.

The chunks are mutable slices and do not overlap. If chunk_size does not divide the length of the slice, then the last chunk will not have length of the slice, then the last chunk will not have length chunk_size.

See rchunks_exact_mut for a variant of this iterator that returns chunks of always exactly chunk_size bits, and chunks_mut for the same iterator but starting at the beginning of the slice.

Panics

Panics if chunk_size is 0.

Examples

let mut data = 0u8;
let bits = data.bits_mut::<Lsb0>();
let mut count = 0;

for chunk in bits.rchunks_mut(3) {
    chunk.store(4u8 >> count);
    count += 1;
}
assert_eq!(count, 3);
assert_eq!(data, 0b100_010_01);

pub fn rchunks_exact(&self, chunk_size: usize) -> RChunksExact<'_, O, T>

Returns an iterator over chunk_size bits of the slice at a time, starting at the end of the slice.

The chunks are slices and do not overlap. If chunk_size does not divide the length of the slice, then the last up to chunk_size - 1 bits will be omitted and can be retrieved from the remainder function of the iterator.

Due to each chunk having exactly chunk_size bits, the compiler can often optimize the resulting code better than in the case of chunks.

See rchunks for a variant of this iterator that also returns the remainder as a smaller chunk, and chunks_exact for the same iterator but starting at the beginning of the slice.

Panics

Panics if chunk_size is 0.

Examples

let data = 0b100_010_01u8;
let bits = data.bits::<Lsb0>();
let mut iter = bits.rchunks_exact(3);
assert_eq!(iter.next().unwrap(), &bits[5 .. 8]);
assert_eq!(iter.next().unwrap(), &bits[2 .. 5]);
assert!(iter.next().is_none());
assert_eq!(iter.remainder(), &bits[0 ..2]);

pub fn rchunks_exact_mut( &mut self, chunk_size: usize, ) -> RChunksExactMut<'_, O, T>

Returns an iterator over chunk_size bits of the slice at a time, starting at the end of the slice.

The chunks are mutable slices, and do not overlap. If chunk_size does not divide the length of the slice, then the last up to chunk_size - 1 bits will be omitted and can be retrieved from the into_remainder function of the iterator.

Due to each chunk having exactly chunk_size bits, the compiler can often optimize the resulting code better than in the case of chunks_mut.

See rchunks_mut for a variant of this iterator that also returns the remainder as a smaller chunk, and chunks_exact_mut for the same iterator but starting at the beginning of the slice.

Panics

Panics if chunk_size is 0.

Examples

let mut data = 0u8;
let bits = data.bits_mut::<Lsb0>();
let mut count = 0;
let mut iter = bits.rchunks_exact_mut(3);

for chunk in &mut iter {
    chunk.store(4u8 >> count);
    count += 1;
}
iter.into_remainder().store(1u8);
assert_eq!(data, 0b100_010_01);
assert_eq!(count, 2);

pub fn split_at(&self, mid: usize) -> (&BitSlice<O, T>, &BitSlice<O, T>)

Divides one slice into two at an index.

The first will contain all indices from [0, mid) (excluding the index mid itself) and the second will contain all indices from [mid, len) (excluding the index len itself).

Panics

Panics if mid > len.

Examples

let data = 0x0Fu8;
let bits = data.bits::<Msb0>();

{
    let (left, right) = bits.split_at(0);
    assert!(left.is_empty());
    assert_eq!(right, bits);
}

{
    let (left, right) = bits.split_at(4);
    assert!(left.not_any());
    assert!(right.all());
}

{
    let (left, right) = bits.split_at(8);
    assert_eq!(left, bits);
    assert!(right.is_empty());
}

pub fn split_at_mut( &mut self, mid: usize, ) -> (&mut BitSlice<O, T>, &mut BitSlice<O, T>)

Divides one mutable slice into two at an index.

The first will contain all indices from [0, mid) (excluding the index mid itself) and the second will contain all indices from [mid, len) (excluding the index len itself).

Panics

Panics if mid > len.

Examples

let mut data = 0x0Fu8;
let bits = data.bits_mut::<Msb0>();

let (left, right) = bits.split_at_mut(4);
assert!(left.not_any());
assert!(right.all());
*left.at(1) = true;
*right.at(2) = false;

assert_eq!(data, 0b0100_1101);

pub fn split<F>(&self, func: F) -> Split<'_, O, T, F>

where F: FnMut(usize, &bool) -> bool,

Returns an iterator over subslices separated by indexed bits that satisfy the predicate function. The matched position is not contained in the subslices.

API Differences

The slice::split method takes a predicate function with signature (&T) -> bool, whereas this method’s predicate function has signature (usize, &T) -> bool. This difference is in place because BitSlice by definition has only one bit of information per slice item, and including the index allows the callback function to make more informed choices.

Examples

let data = 0b01_001_000u8;
let bits = data.bits::<Msb0>();
let mut iter = bits.split(|pos, bit| *bit);

assert_eq!(iter.next().unwrap(), &bits[0 .. 1]);
assert_eq!(iter.next().unwrap(), &bits[2 .. 4]);
assert_eq!(iter.next().unwrap(), &bits[5 .. 8]);
assert!(iter.next().is_none());

If the first position is matched, an empty slice will be the first item returned by the iterator. Similarly, if the last position in the slice is matched, an empty slice will be the last item returned by the iterator:

let data = 1u8;
let bits = data.bits::<Msb0>();
let mut iter = bits.split(|pos, bit| *bit);

assert_eq!(iter.next().unwrap(), &bits[0 .. 7]);
assert_eq!(iter.next().unwrap(), BitSlice::<Local, usize>::empty());
assert!(iter.next().is_none());

If two matched positions are directly adjacent, an empty slice will be present between them.

let data = 0b001_100_00u8;
let bits = data.bits::<Msb0>();
let mut iter = bits.split(|pos, bit| *bit);

assert_eq!(iter.next().unwrap(), &bits[0 .. 2]);
assert_eq!(iter.next().unwrap(), BitSlice::<Local, usize>::empty());
assert_eq!(iter.next().unwrap(), &bits[4 .. 8]);
assert!(iter.next().is_none());

pub fn split_mut<F>(&mut self, func: F) -> SplitMut<'_, O, T, F>

where F: FnMut(usize, &bool) -> bool,

Returns an iterator over mutable subslices separated by indexed bits that satisfy the predicate function. The matched position is not contained in the subslices.

API Differences

The slice::split_mut method takes a predicate function with signature (&T) -> bool, whereas this method’s predicate function has signature (usize, &T) -> bool. This difference is in place because BitSlice by definition has only one bit of information per slice item, and including the index allows the callback function to make more informed choices.

Examples

let mut data = 0b001_000_10u8;
let bits = data.bits_mut::<Msb0>();

for group in bits.split_mut(|pos, bit| *bit) {
    *group.at(0) = true;
}
assert_eq!(data, 0b101_1001_1u8);

pub fn rsplit<F>(&self, func: F) -> RSplit<'_, O, T, F>

where F: FnMut(usize, &bool) -> bool,

Returns an iterator over subslices separated by indexed bits that satisfy a predicate function, starting at the end of the slice and working backwards. The matched position is not contained in the subslices.

API Differences

The slice::rsplit method takes a predicate function with signature (&T) -> bool, whereas this method’s predicate function has signature (usize, &T) -> bool. This difference is in place because BitSlice by definition has only one bit of information per slice item, and including the index allows the callback function to make more informed choices.

Examples

let data = 0b0001_0000u8;
let bits = data.bits::<Msb0>();
let mut iter = bits.rsplit(|pos, bit| *bit);

assert_eq!(iter.next().unwrap(), &bits[4 .. 8]);
assert_eq!(iter.next().unwrap(), &bits[0 .. 3]);
assert!(iter.next().is_none());

As with split(), if the first or last position is matched, an empty slice will be the first (or last) item returned by the iterator.

let data = 0b1001_0001u8;
let bits = data.bits::<Msb0>();
let mut iter = bits.rsplit(|pos, bit| *bit);
assert!(iter.next().unwrap().is_empty());
assert_eq!(iter.next().unwrap(), &bits[4 .. 7]);
assert_eq!(iter.next().unwrap(), &bits[1 .. 3]);
assert!(iter.next().unwrap().is_empty());
assert!(iter.next().is_none());

pub fn rsplit_mut<F>(&mut self, func: F) -> RSplitMut<'_, O, T, F>

where F: FnMut(usize, &bool) -> bool,

Returns an iterator over mutable subslices separated by indexed bits that satisfy a predicate function, starting at the end of the slice and working backwards. The matched position is not contained in the subslices.

API Differences

The slice::rsplit_mut method takes a predicate function with signature (&T) -> bool, whereas this method’s predicate function has signature (usize, &T) -> bool. This difference is in place because BitSlice by definition has only one bit of information per slice item, and including the index allows the callback function to make more informed choices.

Examples

let mut data = 0u8;
let bits = data.bits_mut::<Msb0>();

let mut count = 0u8;
for group in bits.rsplit_mut(|pos, bit| pos % 3 == 2) {
    count += 1;
    group.store(count);
}
assert_eq!(data, 0b11_0_10_0_01);

pub fn splitn<F>(&self, n: usize, func: F) -> SplitN<'_, O, T, F>

where F: FnMut(usize, &bool) -> bool,

Returns an iterator over subslices separated by indexed bits that satisfy the predicate function, limited to returning at most n items. The matched position is not contained in the subslices.

The last element returned, if any, will contain the remainder of the slice.

API Differences

The slice::splitn method takes a predicate function with signature (&T) -> bool, whereas this method’s predicate function has signature (usize, &T) -> bool. This difference is in place because BitSlice by definition has only one bit of information per slice item, and including the index allows the callback function to make more informed choices.

Examples

Print the slice split once by indices divisible by 3:

let data = 0xA5u8;
let bits = data.bits::<Msb0>();

for group in bits.splitn(2, |pos, bit| pos % 3 == 2) {
    println!("{}", group);
}
//  [10]
//  [00101]

pub fn splitn_mut<F>(&mut self, n: usize, func: F) -> SplitNMut<'_, O, T, F>

where F: FnMut(usize, &bool) -> bool,

Returns an iterator over mutable subslices separated by indexed bits that satisfy the predicate function, limited to returning at most n items. The matched position is not contained in the subslices.

The last element returned, if any, will contain the remainder of the slice.

API Differences

The slice::splitn_mut method takes a predicate function with signature (&T) -> bool, whereas this method’s predicate function has signature (usize, &T) -> bool. This difference is in place because BitSlice by definition has only one bit of information per slice item, and including the index allows the callback function to make more informed choices.

Examples

let mut data = 0u8;
let bits = data.bits_mut::<Msb0>();
let mut counter = 0u8;

for group in bits.splitn_mut(2, |pos, bit| pos % 4 == 3) {
    counter += 1;
    group.store(counter);
}
assert_eq!(data, 0b001_0_0010);

pub fn rsplitn<F>(&self, n: usize, func: F) -> RSplitN<'_, O, T, F>

where F: FnMut(usize, &bool) -> bool,

Returns an iterator over subslices separated by indexed bits that satisfy a predicate function, limited to returning at most n items. This starts at the end of the slice and works backwards. The matched position is not contained in the subslices.

The last element returned, if any, will contain the remainder of the slice.

API Differences

The slice::rsplitn method takes a predicate function with signature (&T) -> bool, whereas this method’s predicate function has signature (usize, &T) -> bool. This difference is in place because BitSlice by definition has only one bit of information per slice item, and including the index allows the callback function to make more informed choices.

Examples

Print the slice split once, starting from the end, by indices divisible by 3:

let data = 0xA5u8;
let bits = data.bits::<Msb0>();

for group in bits.rsplitn(2, |pos, bit| pos % 3 == 2) {
    println!("{}", group);
}
//  [01]
//  [10100]

pub fn rsplitn_mut<F>(&mut self, n: usize, func: F) -> RSplitNMut<'_, O, T, F>

where F: FnMut(usize, &bool) -> bool,

Returns an iterator over mutable subslices separated by indexed bits that satisfy a predicate function, limited to returning at most n items. This starts at the end of the slice and works backwards. The matched position is not contained in the subslices.

The last element returned, if any, will contain the remainder of the slice.

API Differences

The slice::rsplitn_mut method takes a predicate function with signature (&T) -> bool, whereas this method’s predicate function has signature (usize, &T) -> bool. This difference is in place because BitSlice by definition has only one bit of information per slice item, and including the index allows the callback function to make more informed choices.

Examples

let mut data = 0u8;
let bits = data.bits_mut::<Msb0>();
let mut counter = 0u8;

for group in bits.rsplitn_mut(2, |pos, bit| pos % 3 == 2) {
    counter += 1;
    group.store(counter);
}
assert_eq!(data, 0b00010_0_01);

pub fn contains<P, U>(&self, query: &BitSlice<P, U>) -> bool

where P: BitOrder, U: BitStore,

Returns true if the slice contains a region that matches the given span.

API Differences

The slice::contains method tests for a single slice element. Because this is a slice of single bits, testing for the presence of one bool value is not very informative. This instead searches for a subslice, which may be one or more bits.

Examples

let data = 0b0101_1010u8;
let bits_be = data.bits::<Msb0>();
let bits_le = data.bits::<Lsb0>();
assert!(bits_be.contains(&bits_le[1 .. 5]));

This example uses a palindrome pattern to demonstrate that the query does not need to have the same type parameters as the searched slice.

pub fn starts_with<P, U>(&self, prefix: &BitSlice<P, U>) -> bool

where P: BitOrder, U: BitStore,

Returns true if prefix is a prefix of the slice.

Examples

let data = 0b0110_1110u8;
let bits = data.bits::<Msb0>();
assert!(bits.starts_with(&data.bits::<Lsb0>()[.. 2]));

pub fn ends_with<P, U>(&self, suffix: &BitSlice<P, U>) -> bool

where P: BitOrder, U: BitStore,

Returns true if suffix is a suffix of the slice.

Examples

let data = 0b0111_1010u8;
let bits = data.bits::<Msb0>();
assert!(bits.ends_with(&data.bits::<Lsb0>()[6 ..]));

pub fn rotate_left(&mut self, by: usize)

Rotates the slice in-place such that the first by bits of the slice move to the end while the last self.len() - by bits move to the front. After calling rotate_left, the bit previously at index by will become the first bit in the slice.

Panics

This function will panic if by is greater than the length of the slice. Note that by == self.len() does not panic and is a noöp rotation.

Complexity

Takes linear (in self.len()) time.

Examples

let mut data = 0xF0u8;
let bits = data.bits_mut::<Msb0>();
bits.rotate_left(2);
assert_eq!(data, 0xC3);

Rotating a subslice:

let mut data = 0xF0u8;
let bits = data.bits_mut::<Msb0>();
bits[1 .. 5].rotate_left(1);
assert_eq!(data, 0b1_1101_000);

pub fn rotate_right(&mut self, by: usize)

Rotates the slice in-place such that the first self.len() - by bits of the slice move to the end while the last by bits move to the front. After calling rotate_right, the bit previously at index self.len() - by will become the first bit in the slice.

Panics

This function will panic if by is greater than the length of the slice. Note that by == self.len() does not panic and is a noöp rotation.

Complexity

Takes linear (in self.len()) time.

Examples

let mut data = 0xF0u8;
let bits = data.bits_mut::<Msb0>();
bits.rotate_right(2);
assert_eq!(data, 0x3C);

Rotate a subslice:

let mut data = 0xF0u8;
let bits = data.bits_mut::<Msb0>();
bits[1 .. 5].rotate_right(1);
assert_eq!(data, 0b1_0111_000);

pub fn clone_from_slice<P, U>(&mut self, src: &BitSlice<P, U>)

where P: BitOrder, U: BitStore,

Copies the elements from src into self.

The length of src must be the same as self.

This is equivalent to copy_from_slice; this function is only included for API surface equivalence.

Panics

This function will panic if the two slices have different lengths.

Examples

let mut data = 0u8;
let bits = data.bits_mut::<Msb0>();
let src = 0x0Fu16.bits::<Lsb0>();
bits.clone_from_slice(&src[.. 8]);
assert_eq!(data, 0xF0);

Rust enforces that there can only be one mutable reference with no immutable references to a particular piece of data in a particular scope. Because of this, attempting to use clone_from_slice on a single slice will result in a compile failure:

let mut data = 3u8;
let bits = data.bits_mut::<Msb0>();
bits[.. 2].clone_from_slice(&bits[6 ..]);

To work around this, we can use [split_at_mut] to create two distinct sub-slices from a slice:

let mut data = 3u8;
let bits = data.bits_mut::<Msb0>();
let (head, tail) = bits.split_at_mut(4);
head.clone_from_slice(tail);
assert_eq!(data, 0x33);

pub fn copy_from_slice(&mut self, src: &BitSlice<O, T>)

Copies the elements from src into self.

The length of src must be the same as self.

This is restricted to take exactly the same type of bit slice as the source slice, so that the implementation has the chace to use faster memcpy if possible.

Panics

This function will panic if the two slices have different lengths.

Examples

let mut data = 0u8;
let bits = data.bits_mut::<Msb0>();
let src = 0x0Fu8.bits::<Msb0>();
bits.copy_from_slice(src);
assert_eq!(data, 0x0F);

Rust enforces that there can only be one mutable reference with no immutable references to a particular piece of data in a particular scope. Because of this, attempting to use copy_from_slice on a single slice will result in a compile failure:

let mut data = 3u8;
let bits = data.bits_mut::<Msb0>();
bits[.. 2].copy_from_slice(&bits[6 ..]);

To work around this, we can use [split_at_mut] to create two distinct sub-slices from a slice:

let mut data = 3u8;
let bits = data.bits_mut::<Msb0>();
let (head, tail) = bits.split_at_mut(4);
head.copy_from_slice(tail);
assert_eq!(data, 0x33);

pub fn swap_with_slice<P, U>(&mut self, other: &mut BitSlice<P, U>)

where P: BitOrder, U: BitStore,

Swaps all bits in self with those in other.

The length of other must be the same as self.

Panics

This function will panic if the two slices hav different lengths.

Example

Swapping two elements across slices:

let mut a = 0u8;
let mut b = 0x96A5u16;
let bits_a = a.bits_mut::<Lsb0>();
let bits_b = b.bits_mut::<Msb0>();

bits_a.swap_with_slice(&mut bits_b[4 .. 12]);

assert_eq!(a, 0x56);
assert_eq!(b, 0x9005);

Rust enforces that there can only be one mutable reference to a particular piece of data in a particular scope. Because of this, attempting to use swap_with_slice on a single slice will result in a compile failure:

let mut data = 15u8;
let bits = data.bits_mut::<Msb0>();
bits[.. 3].swap_with_slice(&mut bits[5 ..]);

To work around this, we can use [split_at_mut] to create two distinct mutable sub-slices from a slice:

let mut data = 15u8;
let bits = data.bits_mut::<Msb0>();

{
    let (left, right) = bits.split_at_mut(4);
    left[.. 2].swap_with_slice(&mut right[2 ..]);
}

assert_eq!(data, 0xCC);

pub unsafe fn align_to<U>( &self, ) -> (&BitSlice<O, T>, &BitSlice<O, U>, &BitSlice<O, T>)

where U: BitStore,

Transmute the slice to a slice with a different backing store, ensuring alignment of the types is maintained.

This method splits the slice into three distinct slices: prefix, correctly aligned middle slice of a new backing type, and the suffix slice. The method does a best effort to make the middle slice the greatest length possible for a given type and input slice, but only your algorithm’s performance should depend on that, not its correctness.

Safety

This method is essentially a transmute with respect to the elements in the returned middle slice, so all the usual caveats pertaining to transmute::<T, U> also apply here.

Examples

Basic usage:

unsafe {
    let bytes: [u8; 7] = [1, 2, 3, 4, 5, 6, 7];
    let bits = bytes.bits::<Local>();
    let (prefix, shorts, suffix) = bits.align_to::<u16>();
    match prefix.len() {
        0 => {
            assert_eq!(shorts, bits[.. 48]);
            assert_eq!(suffix, bits[48 ..]);
        },
        8 => {
            assert_eq!(prefix, bits[.. 8]);
            assert_eq!(shorts, bits[8 ..]);
        },
        _ => unreachable!("This case will not occur")
    }
}

pub unsafe fn align_to_mut<U>( &mut self, ) -> (&mut BitSlice<O, T>, &mut BitSlice<O, U>, &mut BitSlice<O, T>)

where U: BitStore,

Transmute the slice to a slice with a different backing store, ensuring alignment of the types is maintained.

This method splits the slice into three distinct slices: prefix, correctly aligned middle slice of a new backing type, and the suffix slice. The method does a best effort to make the middle slice the greatest length possible for a given type and input slice, but only your algorithm’s performance should depend on that, not its correctness.

Safety

This method is essentially a transmute with respect to the elements in the returned middle slice, so all the usual caveats pertaining to transmute::<T, U> also apply here.

Examples

Basic usage:

unsafe {
    let mut bytes: [u8; 7] = [1, 2, 3, 4, 5, 6, 7];
    let bits = bytes.bits_mut::<Local>();
    let (prefix, shorts, suffix) = bits.align_to_mut::<u16>();
    //  same access and behavior as in `align_to`
}

pub fn to_vec(&self) -> BitVec<O, T>

Copies self into a new BitVec.

Examples

let data = [0u8, !0u8];
let bits = data.bits::<Local>();
let vec = bits.to_vec();
assert_eq!(bits, vec);

Trait Implementations

impl<O, Bits> Deref for TinyBitVec<Bits, O>

where O: BitOrder, Bits: AsBits + Default,

type Target = BitSlice<O, <Bits as AsBits>::Store>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<O, Bits> DerefMut for TinyBitVec<Bits, O>

where O: BitOrder, Bits: AsBits + Default,

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.