Trait IntoStorageKeys

pub trait IntoStorageKeys {
    type Keys: StorageKeys;

    // Required methods
    fn into_storage_keys(self) -> Self::Keys;
    fn num_keys(&self) -> usize;
}

This can be implemented for anything that can be converted into something implementing StorageKeys. It is implemented by default for tuples up to length 10, vectors and arrays (where the values all implement scale_encode::EncodeAsType).

Required Associated Types

type Keys: StorageKeys

An implementation of StorageKeys that can be used to iterate through the keys.

Required Methods

fn into_storage_keys(self) -> Self::Keys

Return an implementation of StorageKeys for this type.

fn num_keys(&self) -> usize

The number of storage keys this type represents.

Implementations on Foreign Types

impl IntoStorageKeys for ()

type Keys = ()

fn num_keys(&self) -> usize

fn into_storage_keys(self) -> Self::Keys

impl<A: EncodeAsType> IntoStorageKeys for (A,)

type Keys = TupleIter<A>

fn num_keys(&self) -> usize

fn into_storage_keys(self) -> Self::Keys

impl<A: EncodeAsType, B: EncodeAsType> IntoStorageKeys for (A, B)

type Keys = TupleIter<A, B>

fn num_keys(&self) -> usize

fn into_storage_keys(self) -> Self::Keys

impl<A: EncodeAsType, B: EncodeAsType, C: EncodeAsType> IntoStorageKeys for (A, B, C)

type Keys = TupleIter<A, B, C>

fn num_keys(&self) -> usize

fn into_storage_keys(self) -> Self::Keys

impl<A: EncodeAsType, B: EncodeAsType, C: EncodeAsType, D: EncodeAsType> IntoStorageKeys for (A, B, C, D)

type Keys = TupleIter<A, B, C, D>

fn num_keys(&self) -> usize

fn into_storage_keys(self) -> Self::Keys

impl<A: EncodeAsType, B: EncodeAsType, C: EncodeAsType, D: EncodeAsType, E: EncodeAsType> IntoStorageKeys for (A, B, C, D, E)

type Keys = TupleIter<A, B, C, D, E>

fn num_keys(&self) -> usize

fn into_storage_keys(self) -> Self::Keys

impl<A: EncodeAsType, B: EncodeAsType, C: EncodeAsType, D: EncodeAsType, E: EncodeAsType, F: EncodeAsType> IntoStorageKeys for (A, B, C, D, E, F)

type Keys = TupleIter<A, B, C, D, E, F>

fn num_keys(&self) -> usize

fn into_storage_keys(self) -> Self::Keys

impl<A: EncodeAsType, B: EncodeAsType, C: EncodeAsType, D: EncodeAsType, E: EncodeAsType, F: EncodeAsType, G: EncodeAsType> IntoStorageKeys for (A, B, C, D, E, F, G)

type Keys = TupleIter<A, B, C, D, E, F, G>

fn num_keys(&self) -> usize

fn into_storage_keys(self) -> Self::Keys

impl<A: EncodeAsType, B: EncodeAsType, C: EncodeAsType, D: EncodeAsType, E: EncodeAsType, F: EncodeAsType, G: EncodeAsType, H: EncodeAsType> IntoStorageKeys for (A, B, C, D, E, F, G, H)

type Keys = TupleIter<A, B, C, D, E, F, G, H>

fn num_keys(&self) -> usize

fn into_storage_keys(self) -> Self::Keys

impl<A: EncodeAsType, B: EncodeAsType, C: EncodeAsType, D: EncodeAsType, E: EncodeAsType, F: EncodeAsType, G: EncodeAsType, H: EncodeAsType, I: EncodeAsType> IntoStorageKeys for (A, B, C, D, E, F, G, H, I)

type Keys = TupleIter<A, B, C, D, E, F, G, H, I>

fn num_keys(&self) -> usize

fn into_storage_keys(self) -> Self::Keys

impl<A: EncodeAsType, B: EncodeAsType, C: EncodeAsType, D: EncodeAsType, E: EncodeAsType, F: EncodeAsType, G: EncodeAsType, H: EncodeAsType, I: EncodeAsType, J: EncodeAsType> IntoStorageKeys for (A, B, C, D, E, F, G, H, I, J)

type Keys = TupleIter<A, B, C, D, E, F, G, H, I, J>

fn num_keys(&self) -> usize

fn into_storage_keys(self) -> Self::Keys

impl<K: EncodeAsType> IntoStorageKeys for Vec<K>

type Keys = <Vec<K> as IntoIterator>::IntoIter

fn num_keys(&self) -> usize

fn into_storage_keys(self) -> Self::Keys

impl<K: EncodeAsType, const N: usize> IntoStorageKeys for [K; N]

type Keys = <[K; N] as IntoIterator>::IntoIter

fn num_keys(&self) -> usize

fn into_storage_keys(self) -> Self::Keys

Implementors