Struct Bitvector 

pub struct Bitvector<const N: usize> { /* private fields */ }

SSZ Bitvector with a compile-time length of N bits.

Storage is a heap-allocated byte vector of length (N + 7) / 8. Using a Vec avoids generic_const_exprs (still unstable) while keeping the invariant at the type level.

Implementations

impl<const N: usize> Bitvector<N>

pub fn from_slice(bytes: &[u8]) -> Result<Self, DecodeError>

Build from a slice (must have exact length (N+7)/8).

pub fn get(&self, i: usize) -> bool

Get bit i. Panics if i >= N.

pub fn set(&mut self, i: usize, v: bool)

Set bit i to v. Panics if i >= N.

pub fn as_bytes(&self) -> &[u8]

Borrow the raw packed bytes.

pub const fn len(&self) -> usize

Length in bits (always N).

pub const fn is_empty(&self) -> bool

true iff N == 0.

Trait Implementations

impl<const N: usize> Clone for Bitvector<N>

fn clone(&self) -> Bitvector<N>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<const N: usize> Debug for Bitvector<N>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<const N: usize> Decode for Bitvector<N>

fn is_ssz_fixed_len() -> bool

true iff this type is fixed-length.

fn ssz_fixed_len() -> usize

Number of bytes this type occupies in the fixed-length portion of a container encoding. Variable-length types return BYTES_PER_LENGTH_OFFSET.

fn from_ssz_bytes(bytes: &[u8]) -> Result<Self, DecodeError>

Decode a full instance from bytes, rejecting trailing input.

impl<const N: usize> Default for Bitvector<N>

fn default() -> Self

Returns the “default value” for a type.

impl<const N: usize> Encode for Bitvector<N>

fn is_ssz_fixed_len() -> bool

true iff this type is fixed-length (no variable-length fields).

fn ssz_fixed_len() -> usize

Number of bytes this type occupies in the fixed-length portion of a container encoding. For variable-length types this returns BYTES_PER_LENGTH_OFFSET (i.e. the size of the offset slot).

fn ssz_bytes_len(&self) -> usize

Total size of self when serialized.

fn ssz_append(&self, buf: &mut Vec<u8>)

Append the encoding of self to buf.

fn is_basic_type() -> bool

true for “basic” SSZ types (uintN, bool), which pack adjacent elements into shared 32-byte chunks for merkleization. Composite types (containers, lists, structs) return false (the default).

fn as_ssz_bytes(&self) -> Vec<u8>

Serialize into a fresh Vec<u8> allocated through the global allocator.

impl<const N: usize> HashTreeRoot for Bitvector<N>

fn hash_tree_root<D: Digest<OutputSize = U32>>(&self) -> [u8; 32]

Compute the hash tree root using D as the underlying hash.

impl<const N: usize> PartialEq for Bitvector<N>

fn eq(&self, other: &Bitvector<N>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<const N: usize> Eq for Bitvector<N>

impl<const N: usize> StructuralPartialEq for Bitvector<N>