Struct TrieMask
pub struct TrieMask(/* private fields */);Available on crate feature
trie only.Expand description
A struct representing a mask of 16 bits, used for Ethereum trie operations.
Masks in a trie are used to efficiently represent and manage information about the presence or absence of certain elements, such as child nodes, within a trie. Masks are usually implemented as bit vectors, where each bit represents the presence (1) or absence (0) of a corresponding element.
Implementations§
§impl TrieMask
impl TrieMask
pub const fn from_nibble(nibble: u8) -> TrieMask
pub const fn from_nibble(nibble: u8) -> TrieMask
Creates a new TrieMask from the given nibble.
pub fn is_subset_of(self, other: TrieMask) -> bool
pub fn is_subset_of(self, other: TrieMask) -> bool
Returns true if the current TrieMask is a subset of other.
pub const fn is_bit_set(self, index: u8) -> bool
pub const fn is_bit_set(self, index: u8) -> bool
Returns true if a given bit is set in a mask.
pub const fn count_bits(self) -> u8
pub const fn count_bits(self) -> u8
Returns the number of bits set in the mask.
pub const fn first_set_bit_index(self) -> Option<u8>
pub const fn first_set_bit_index(self) -> Option<u8>
Returns the index of the first bit set in the mask, or None if the mask is empty.
Trait Implementations§
§impl<'arbitrary> Arbitrary<'arbitrary> for TrieMask
impl<'arbitrary> Arbitrary<'arbitrary> for TrieMask
§fn arbitrary(u: &mut Unstructured<'arbitrary>) -> Result<TrieMask, Error>
fn arbitrary(u: &mut Unstructured<'arbitrary>) -> Result<TrieMask, Error>
Generate an arbitrary value of
Self from the given unstructured data. Read more§fn arbitrary_take_rest(u: Unstructured<'arbitrary>) -> Result<TrieMask, Error>
fn arbitrary_take_rest(u: Unstructured<'arbitrary>) -> Result<TrieMask, Error>
Generate an arbitrary value of
Self from the entirety of the given
unstructured data. Read more§fn size_hint(depth: usize) -> (usize, Option<usize>)
fn size_hint(depth: usize) -> (usize, Option<usize>)
Get a size hint for how many bytes out of an
Unstructured this type
needs to construct itself. Read more§fn try_size_hint(
depth: usize,
) -> Result<(usize, Option<usize>), MaxRecursionReached>
fn try_size_hint( depth: usize, ) -> Result<(usize, Option<usize>), MaxRecursionReached>
Get a size hint for how many bytes out of an
Unstructured this type
needs to construct itself. Read more§impl Arbitrary for TrieMask
impl Arbitrary for TrieMask
§type Parameters = <u16 as Arbitrary>::Parameters
type Parameters = <u16 as Arbitrary>::Parameters
The type of parameters that
arbitrary_with accepts for configuration
of the generated Strategy. Parameters must implement Default.§type Strategy = Map<<u16 as Arbitrary>::Strategy, fn(_: u16) -> TrieMask>
type Strategy = Map<<u16 as Arbitrary>::Strategy, fn(_: u16) -> TrieMask>
The type of
Strategy used to generate values of type Self.§fn arbitrary_with(
_top: <TrieMask as Arbitrary>::Parameters,
) -> <TrieMask as Arbitrary>::Strategy
fn arbitrary_with( _top: <TrieMask as Arbitrary>::Parameters, ) -> <TrieMask as Arbitrary>::Strategy
§impl BitAndAssign for TrieMask
impl BitAndAssign for TrieMask
§fn bitand_assign(&mut self, rhs: TrieMask)
fn bitand_assign(&mut self, rhs: TrieMask)
Performs the
&= operation. Read more§impl BitOrAssign for TrieMask
impl BitOrAssign for TrieMask
§fn bitor_assign(&mut self, rhs: TrieMask)
fn bitor_assign(&mut self, rhs: TrieMask)
Performs the
|= operation. Read more§impl Compact for TrieMask
impl Compact for TrieMask
§fn to_compact<B>(&self, buf: &mut B) -> usize
fn to_compact<B>(&self, buf: &mut B) -> usize
Takes a buffer which can be written to. Ideally, it returns the length written to.
§fn from_compact(buf: &[u8], _len: usize) -> (TrieMask, &[u8])
fn from_compact(buf: &[u8], _len: usize) -> (TrieMask, &[u8])
Takes a buffer which can be read from. Returns the object and
buf with its internal cursor
advanced (eg..advance(len)). Read more§fn specialized_to_compact<B>(&self, buf: &mut B) -> usize
fn specialized_to_compact<B>(&self, buf: &mut B) -> usize
“Optional”: If there’s no good reason to use it, don’t.
§fn specialized_from_compact(buf: &[u8], len: usize) -> (Self, &[u8])
fn specialized_from_compact(buf: &[u8], len: usize) -> (Self, &[u8])
“Optional”: If there’s no good reason to use it, don’t.
§impl<'de> Deserialize<'de> for TrieMask
impl<'de> Deserialize<'de> for TrieMask
§fn deserialize<__D>(
__deserializer: __D,
) -> Result<TrieMask, <__D as Deserializer<'de>>::Error>where
__D: Deserializer<'de>,
fn deserialize<__D>(
__deserializer: __D,
) -> Result<TrieMask, <__D as Deserializer<'de>>::Error>where
__D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
§impl Ord for TrieMask
impl Ord for TrieMask
§impl PartialOrd for TrieMask
impl PartialOrd for TrieMask
§impl Serialize for TrieMask
impl Serialize for TrieMask
§fn serialize<__S>(
&self,
__serializer: __S,
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>where
__S: Serializer,
fn serialize<__S>(
&self,
__serializer: __S,
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>where
__S: Serializer,
Serialize this value into the given Serde serializer. Read more
impl Copy for TrieMask
impl Eq for TrieMask
impl StructuralPartialEq for TrieMask
Auto Trait Implementations§
impl Freeze for TrieMask
impl RefUnwindSafe for TrieMask
impl Send for TrieMask
impl Sync for TrieMask
impl Unpin for TrieMask
impl UnwindSafe for TrieMask
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Size: 2 bytes