Struct sp_trie::Layout

source · [−]

pub struct Layout<H>(_);

Expand description

substrate trie layout

Trait Implementations

impl<H: Default> Default for Layout<H>

fn default() -> Layout<H>

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

impl<H: Hasher> TrieConfiguration for Layout<H>

fn trie_root<I, A, B>(input: I) -> <Self::Hash as Hasher>::Out where
    I: IntoIterator<Item = (A, B)>,
    A: AsRef<[u8 ]> + Ord,
    B: AsRef<[u8 ]>,

Determines a trie root given its ordered contents, closed form.

fn trie_root_unhashed<I, A, B>(input: I) -> Vec<u8>ⓘ
Notable traits for Vec<u8, A>
`impl<A> Write for Vec<u8, A> where     A: Allocator,`
where
    I: IntoIterator<Item = (A, B)>,
    A: AsRef<[u8 ]> + Ord,
    B: AsRef<[u8 ]>,

Determines a trie root node’s data given its ordered contents, closed form.

fn encode_index(input: u32) -> Vec<u8>ⓘ
Notable traits for Vec<u8, A>
`impl<A> Write for Vec<u8, A> where A: Allocator,`

Encoding of index as a key (when reusing general trie for indexed trie). Read more

fn trie_build<DB, I, A, B>(db: &mut DB, input: I) -> <Self::Hash as Hasher>::Out where
    DB: HashDB<Self::Hash, usize>,
    I: IntoIterator<Item = (A, B)>,
    A: AsRef<[u8 ]> + Ord,
    B: AsRef<[u8 ]>,

Operation to build a trie db from its ordered iterator over its key/values.

fn ordered_trie_root<I, A>(input: I) -> <Self::Hash as Hasher>::Out where
I: IntoIterator<Item = A>,
A: AsRef<[u8 ]>,

A trie root formed from the items, with keys attached according to their compact-encoded index (using parity-codec crate). Read more

impl<H: Hasher> TrieLayout for Layout<H>

const USE_EXTENSION: bool

If true, the trie will use extension nodes and no partial in branch, if false the trie will only use branch and node with partials in both. Read more

const ALLOW_EMPTY: bool

If true, the trie will allow empty values into TrieDBMut

type Hash = H

Hasher to use for this trie.

type Codec = NodeCodec<Self::Hash>

Codec to use (needs to match hasher and nibble ops).

Auto Trait Implementations

impl<H> RefUnwindSafe for Layout<H> where
H: RefUnwindSafe,

impl<H> Send for Layout<H> where
H: Send,

impl<H> Sync for Layout<H> where
H: Sync,

impl<H> Unpin for Layout<H> where
H: Unpin,

impl<H> UnwindSafe for Layout<H> where
H: UnwindSafe,

Blanket Implementations

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

pub fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

pub fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

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

Mutably borrows from an owned value. Read more

impl<T> Downcast for T where
T: Any,

pub fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>ⓘ
Notable traits for Box<W, Global>
`impl<W> Write for Box<W, Global> where W: Write + ?Sized, impl<R> Read for Box<R, Global> where R: Read + ?Sized, impl<I, A> Iterator for Box<I, A> where I: Iterator + ?Sized, A: Allocator, type Item = <I as Iterator>::Item;impl<F, A> Future for Box<F, A> where F: Future + Unpin + ?Sized, A: Allocator + 'static, type Output = <F as Future>::Output;`

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait. Read more

pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait. Read more

pub fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s. Read more

pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s. Read more

impl<T> DowncastSync for T where
T: Any + Send + Sync,

pub fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send + 'static>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait. Read more

impl<T> From<T> for T

const: unstable · source

pub fn from(t: T) -> T

Performs the conversion.

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

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

pub fn into(self) -> U

Performs the conversion.

impl<T, Outer> IsWrappedBy<Outer> for T where
Outer: AsRef<T> + AsMut<T> + From<T>,
T: From<Outer>,

pub fn from_ref(outer: &Outer) -> &T

Get a reference to the inner from the outer.

pub fn from_mut(outer: &mut Outer) -> &mut T

Get a mutable reference to the inner from the outer.

impl<T> Same<T> for T

type Output = T

Should always be Self

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<S, T> UncheckedInto<T> for S where
T: UncheckedFrom<S>,

pub fn unchecked_into(self) -> T

The counterpart to unchecked_from.

impl<V, T> VZip<V> for T where
V: MultiLane<T>,

pub fn vzip(self) -> V

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more

impl<T> MaybeRefUnwindSafe for T where
T: RefUnwindSafe,