Struct frame_support::storage::migration::StorageKeyIterator[][src]

pub struct StorageKeyIterator<K, T, H: ReversibleStorageHasher> { /* fields omitted */ }

Utility to iterate through raw items in storage.

Implementations

impl<K, T, H: ReversibleStorageHasher> StorageKeyIterator<K, T, H>[src]

pub fn new(module: &[u8], item: &[u8]) -> Self[src]

Construct iterator to iterate over map items in module for the map called item.

pub fn with_suffix(module: &[u8], item: &[u8], suffix: &[u8]) -> Self[src]

Construct iterator to iterate over map items in module for the map called item.

pub fn drain(self) -> Self[src]

Mutate this iterator into a draining iterator; items iterated are removed from storage.

Trait Implementations

impl<K: Decode + Sized, T: Decode + Sized, H: ReversibleStorageHasher> Iterator for StorageKeyIterator<K, T, H>[src]

type Item = (K, T)

The type of the elements being iterated over.

Auto Trait Implementations

impl<K, T, H> RefUnwindSafe for StorageKeyIterator<K, T, H> where
    H: RefUnwindSafe,
    K: RefUnwindSafe,
    T: RefUnwindSafe

impl<K, T, H> Send for StorageKeyIterator<K, T, H> where
    H: Send,
    K: Send,
    T: Send

impl<K, T, H> Sync for StorageKeyIterator<K, T, H> where
    H: Sync,
    K: Sync,
    T: Sync

impl<K, T, H> Unpin for StorageKeyIterator<K, T, H> where
    H: Unpin,
    K: Unpin,
    T: Unpin

impl<K, T, H> UnwindSafe for StorageKeyIterator<K, T, H> where
    H: UnwindSafe,
    K: UnwindSafe,
    T: UnwindSafe

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
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impl<T> Borrow<T> for T where
    T: ?Sized
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impl<T> BorrowMut<T> for T where
    T: ?Sized
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impl<T> CheckedConversion for T[src]

impl<T> From<T> for T[src]

impl<T> Instrument for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
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impl<I> IntoIterator for I where
    I: Iterator
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type Item = <I as Iterator>::Item

The type of the elements being iterated over.

type IntoIter = I

Which kind of iterator are we turning this into?

impl<T> IsType<T> for T[src]

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

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

Get a reference to the inner from the outer.

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

Get a mutable reference to the inner from the outer.

impl<I> IteratorRandom for I where
    I: Iterator
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impl<T> MaybeRefUnwindSafe for T where
    T: RefUnwindSafe
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impl<T> Pointable for T[src]

type Init = T

The type for initializers.

impl<T> Same<T> for T[src]

type Output = T

Should always be Self

impl<T> SaturatedConversion for T[src]

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
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type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

impl<S, T> UncheckedInto<T> for S where
    T: UncheckedFrom<S>, 
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impl<T, S> UniqueSaturatedInto<T> for S where
    T: Bounded,
    S: TryInto<T>, 
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impl<V, T> VZip<V> for T where
    V: MultiLane<T>, 
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