Struct TrieMask

pub struct TrieMask(/* private fields */);

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

pub const fn new(inner: u16) -> TrieMask

Creates a new TrieMask from the given inner value.

pub const fn get(self) -> u16

Returns the inner value of the 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

Returns true if the current TrieMask is a subset of other.

pub const fn is_bit_set(self, index: u8) -> bool

Returns true if a given bit is set in a mask.

pub const fn is_empty(self) -> bool

Returns true if the mask is empty.

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>

Returns the index of the first bit set in the mask, or None if the mask is empty.

pub fn set_bit(&mut self, index: u8)

Set bit at a specified index.

pub fn unset_bit(&mut self, index: u8)

Unset bit at a specified index.

Methods from Deref<Target = u16>§

1.43.0 · Source

pub const MIN: u16 = 0u16

1.43.0 · Source

pub const MAX: u16 = 65_535u16

1.53.0 · Source

pub const BITS: u32 = 16u32

Trait Implementations§

impl<'arbitrary> Arbitrary<'arbitrary> for TrieMask

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>

Generate an arbitrary value of Self from the entirety of the given unstructured data. Read more

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>

Get a size hint for how many bytes out of an Unstructured this type needs to construct itself. Read more

impl Arbitrary for TrieMask

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>

The type of Strategy used to generate values of type Self.

fn arbitrary_with( _top: <TrieMask as Arbitrary>::Parameters, ) -> <TrieMask as Arbitrary>::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). The strategy is passed the arguments given in args. Read more

fn arbitrary() -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). Read more

impl BitAnd for TrieMask

type Output = TrieMask

The resulting type after applying the & operator.

fn bitand(self, rhs: TrieMask) -> TrieMask

Performs the & operation. Read more

impl BitAndAssign for TrieMask

fn bitand_assign(&mut self, rhs: TrieMask)

Performs the &= operation. Read more

impl BitOr for TrieMask

type Output = TrieMask

The resulting type after applying the | operator.

fn bitor(self, rhs: TrieMask) -> TrieMask

Performs the | operation. Read more

impl BitOrAssign for TrieMask

fn bitor_assign(&mut self, rhs: TrieMask)

Performs the |= operation. Read more

impl Clone for TrieMask

fn clone(&self) -> TrieMask

Returns a copy of the value. Read more

1.0.0 · Source§

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

Performs copy-assignment from source. Read more

impl Compact for TrieMask

fn to_compact<B>(&self, buf: &mut B) -> usize
where B: BufMut + AsMut<[u8]>,

Takes a buffer which can be written to. Ideally, it returns the length written to.

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
where B: BufMut + AsMut<[u8]>,

“Optional”: If there’s no good reason to use it, don’t.

fn specialized_from_compact(buf: &[u8], len: usize) -> (Self, &[u8])

“Optional”: If there’s no good reason to use it, don’t.

impl Debug for TrieMask

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

Formats the value using the given formatter. Read more

impl Default for TrieMask

fn default() -> TrieMask

Returns the “default value” for a type. Read more

impl Deref for TrieMask

type Target = u16

The resulting type after dereferencing.

fn deref(&self) -> &<TrieMask as Deref>::Target

Dereferences the value.

impl<'de> Deserialize<'de> for TrieMask

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 From<u16> for TrieMask

fn from(value: u16) -> TrieMask

Converts to this type from the input type.

impl Not for TrieMask

type Output = TrieMask

The resulting type after applying the ! operator.

fn not(self) -> TrieMask

Performs the unary ! operation. Read more

impl Ord for TrieMask

fn cmp(&self, other: &TrieMask) -> Ordering

This method returns an Ordering between self and other. Read more

1.21.0 · Source§

fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more

1.21.0 · Source§

fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more

1.50.0 · Source§

fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized,

Restrict a value to a certain interval. Read more

impl PartialEq for TrieMask

fn eq(&self, other: &TrieMask) -> bool

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

1.0.0 · Source§

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 PartialOrd for TrieMask

fn partial_cmp(&self, other: &TrieMask) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more

1.0.0 · Source§

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

Tests less than (for self and other) and is used by the < operator. Read more

1.0.0 · Source§

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

Tests less than or equal to (for self and other) and is used by the <= operator. Read more

1.0.0 · Source§

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

Tests greater than (for self and other) and is used by the > operator. Read more

1.0.0 · Source§

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

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more

impl Serialize for TrieMask

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

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> CloneToUninit for T
where T: Clone,

unsafe fn clone_to_uninit(&self, dst: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit #126799)

Performs copy-assignment from self to dst. Read more

impl<Q, K> Comparable<K> for Q
where Q: Ord + ?Sized, K: Borrow<Q> + ?Sized,

fn compare(&self, key: &K) -> Ordering

Compare self to key and return their ordering.

impl<T> Conv for T

fn conv<T>(self) -> T
where Self: Into<T>,

Converts self into T using Into<T>. Read more

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fn __clone_box(&self, _: Private) -> *mut ()

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.

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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.

fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.

fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.

fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.

fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.

fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.

fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.

fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.

fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. Read more

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fn from(t: T) -> T

Returns the argument unchanged.

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> IntoEither for T

fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R
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Pipes by value. This is generally the method you want to use. Read more

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where R: 'a,

Borrows self and passes that borrow into the pipe function. Read more

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Mutably borrows self and passes that borrow into the pipe function. Read more

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Borrows self, then passes self.borrow() into the pipe function. Read more

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fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R
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Borrows self, then passes self.as_ref() into the pipe function.

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const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

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🔬This is a nightly-only experimental API. (arbitrary_self_types #44874)

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Calls .tap() only in debug builds, and is erased in release builds.

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Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 2 bytes