Struct trie_db::Lookup

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pub struct Lookup<'a, H: Hasher + 'a, C: NodeCodec<H>, Q: Query<H>> {
    pub db: &'a dyn HashDBRef<H, DBValue>,
    pub query: Q,
    pub hash: H::Out,
    pub marker: PhantomData<C>,
}

Expand description

Trie lookup helper object.

Fields

db: &'a dyn HashDBRef<H, DBValue>

database to query from.

query: Q

Query object to record nodes and transform data.

hash: H::Out

Hash to start at

marker: PhantomData<C>

Implementations

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impl<'a, H, C, Q> Lookup<'a, H, C, Q> where
 H: Hasher,
 C: NodeCodec<H>,
 Q: Query<H>,

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pub fn look_up(
self,
key: NibbleSlice<'_>
) -> Result<Option<Q::Item>, H::Out, C::Error>

Look up the given key. If the value is found, it will be passed to the given function to decode or copy.

Auto Trait Implementations

impl<'a, H, C, Q> !RefUnwindSafe for Lookup<'a, H, C, Q>

impl<'a, H, C, Q> !Send for Lookup<'a, H, C, Q>

impl<'a, H, C, Q> !Sync for Lookup<'a, H, C, Q>

impl<'a, H, C, Q> Unpin for Lookup<'a, H, C, Q> where
 C: Unpin,
 Q: Unpin,
 <H as Hasher>::Out: Unpin,

impl<'a, H, C, Q> !UnwindSafe for Lookup<'a, H, C, Q>

Blanket Implementations

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

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pub fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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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

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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

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impl<T> From<T> for T

const: unstable · source

pub fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source

pub fn into(self) -> U

Calls U::from(self).

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

source

impl<T, U> TryFrom 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>::Error>

Performs the conversion.

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

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

Struct trie_db::Lookup

Fields

Implementations

impl<'a, H, C, Q> Lookup<'a, H, C, Q> where
    H: Hasher,
    C: NodeCodec<H>,
    Q: Query<H>,

pub fn look_up(
self,
key: NibbleSlice<'_>
) -> Result<Option<Q::Item>, H::Out, C::Error>

Auto Trait Implementations

impl<'a, H, C, Q> !RefUnwindSafe for Lookup<'a, H, C, Q>

impl<'a, H, C, Q> !Send for Lookup<'a, H, C, Q>

impl<'a, H, C, Q> !Sync for Lookup<'a, H, C, Q>

impl<'a, H, C, Q> Unpin for Lookup<'a, H, C, Q> where
    C: Unpin,
    Q: Unpin,
    <H as Hasher>::Out: Unpin,

impl<'a, H, C, Q> !UnwindSafe for Lookup<'a, H, C, Q>

Blanket Implementations

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

pub fn type_id(&self) -> TypeId

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

pub fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

pub fn from(t: T) -> T

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

pub fn into(self) -> U

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

type Error = Infallible

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

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

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

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

Struct trie_db::Lookup

Fields

Implementations

impl<'a, H, C, Q> Lookup<'a, H, C, Q> where H: Hasher, C: NodeCodec<H>, Q: Query<H>,

pub fn look_up( self, key: NibbleSlice<'_>) -> Result<Option<Q::Item>, H::Out, C::Error>

Auto Trait Implementations

impl<'a, H, C, Q> !RefUnwindSafe for Lookup<'a, H, C, Q>

impl<'a, H, C, Q> !Send for Lookup<'a, H, C, Q>

impl<'a, H, C, Q> !Sync for Lookup<'a, H, C, Q>

impl<'a, H, C, Q> Unpin for Lookup<'a, H, C, Q> where C: Unpin, Q: Unpin, <H as Hasher>::Out: Unpin,

impl<'a, H, C, Q> !UnwindSafe for Lookup<'a, H, C, Q>

Blanket Implementations

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

pub fn type_id(&self) -> TypeId

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

pub fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

pub fn from(t: T) -> T

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

pub fn into(self) -> U

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

type Error = Infallible

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

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

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

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

impl<'a, H, C, Q> Lookup<'a, H, C, Q> where
H: Hasher,
C: NodeCodec<H>,
Q: Query<H>,

pub fn look_up(
self,
key: NibbleSlice<'_>
) -> Result<Option<Q::Item>, H::Out, C::Error>

impl<'a, H, C, Q> Unpin for Lookup<'a, H, C, Q> where
C: Unpin,
Q: Unpin,
<H as Hasher>::Out: Unpin,

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

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

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

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

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

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