Struct multiversx_sc::storage::mappers::MapMapper

pub struct MapMapper<SA, K, V>
where
    SA: StorageMapperApi,
    K: TopEncode + TopDecode + NestedEncode + NestedDecode + 'static,
    V: TopEncode + TopDecode + 'static,
{ /* private fields */ }

Implementations

impl<SA, K, V> MapMapper<SA, K, V>

where SA: StorageMapperApi, K: TopEncode + TopDecode + NestedEncode + NestedDecode, V: TopEncode + TopDecode,

pub fn is_empty(&self) -> bool

Returns true if the map contains no elements.

pub fn len(&self) -> usize

Returns the number of elements in the map.

pub fn contains_key(&self, k: &K) -> bool

Returns true if the map contains a value for the specified key.

pub fn entry(&mut self, key: K) -> Entry<'_, SA, K, V>

Gets the given key’s corresponding entry in the map for in-place manipulation.

pub fn get(&self, k: &K) -> Option<V>

Gets a reference to the value in the entry.

pub fn insert(&mut self, k: K, v: V) -> Option<V>

Sets the value of the entry, and returns the entry’s old value.

pub fn remove(&mut self, k: &K) -> Option<V>

Takes the value out of the entry, and returns it.

pub fn keys(&self) -> Iter<'_, SA, K>

An iterator visiting all keys in arbitrary order. The iterator element type is &'a K.

pub fn values(&self) -> Values<'_, SA, K, V>

An iterator visiting all values in arbitrary order. The iterator element type is &'a V.

pub fn iter(&self) -> Iter<'_, SA, K, V>

An iterator visiting all key-value pairs in arbitrary order. The iterator element type is (&'a K, &'a V).

Trait Implementations

impl<'a, SA, K, V> IntoIterator for &'a MapMapper<SA, K, V>

where SA: StorageMapperApi, K: TopEncode + TopDecode + NestedEncode + NestedDecode, V: TopEncode + TopDecode,

type Item = (K, V)

The type of the elements being iterated over.

type IntoIter = Iter<'a, SA, K, V>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl<SA, K, V> StorageClearable for MapMapper<SA, K, V>

where SA: StorageMapperApi, K: TopEncode + TopDecode + NestedEncode + NestedDecode, V: TopEncode + TopDecode,

fn clear(&mut self)

Clears all the entries owned by the storage.

impl<SA, K, V> StorageMapper<SA> for MapMapper<SA, K, V>

where SA: StorageMapperApi, K: TopEncode + TopDecode + NestedEncode + NestedDecode, V: TopEncode + TopDecode,

fn new(base_key: StorageKey<SA>) -> Self

Will be called automatically by the #[storage_mapper] annotation generated code.

impl<SA, K, V> TopEncodeMulti for MapMapper<SA, K, V>

where SA: StorageMapperApi, K: TopEncode + TopDecode + NestedEncode + NestedDecode + 'static, V: TopEncode + TopDecode + 'static,

Behaves like a MultiResultVec<MultiValue2<K, V>> when an endpoint result.

fn multi_encode_or_handle_err<O, H>( &self, output: &mut O, h: H ) -> Result<(), H::HandledErr>

where O: TopEncodeMultiOutput, H: EncodeErrorHandler,

Version of top_encode that can handle errors as soon as they occur. For instance in can exit immediately and make sure that if it returns, it is a success. By not deferring error handling, this can lead to somewhat smaller bytecode.

fn multi_encode<O>(&self, output: &mut O) -> Result<(), EncodeError>

where O: TopEncodeMultiOutput,

Attempt to serialize the value to ouput.

impl<SA, K, V> TypeAbi for MapMapper<SA, K, V>

where SA: StorageMapperApi, K: TopEncode + TopDecode + NestedEncode + NestedDecode + TypeAbi + 'static, V: TopEncode + TopDecode + TypeAbi + 'static,

Behaves like a MultiResultVec<MultiValue<K, V>> when an endpoint result.

fn type_name() -> TypeName

fn provide_type_descriptions<TDC: TypeDescriptionContainer>( accumulator: &mut TDC )

A type can provide more than its own name. For instance, a struct can also provide the descriptions of the type of its fields. TypeAbi doesn’t care for the exact accumulator type, which is abstracted by the TypeDescriptionContainer trait.

impl<SA, K, V> CodecFrom<MapMapper<SA, K, V>> for MultiValueEncoded<SA, MultiValue2<K, V>>

where SA: StorageMapperApi, K: TopEncode + TopDecode + NestedEncode + NestedDecode + 'static, V: TopEncode + TopDecode + 'static,