Struct StorageMap

pub struct StorageMap<Type>
where
    Type: Mappable,
{ /* private fields */ }

Implementations

impl<Type> StorageMap<Type>

where Type: Mappable,

pub fn new() -> Self

pub fn is_empty(&self) -> bool

pub fn len(&self) -> usize

Trait Implementations

impl<Type> Clone for StorageMap<Type>

where Type: Mappable + Clone, Type::OwnedKey: Clone, Type::OwnedValue: Clone,

fn clone(&self) -> StorageMap<Type>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<Type> Debug for StorageMap<Type>

where Type: Mappable + Debug, Type::OwnedKey: Debug, Type::OwnedValue: Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<Type> Default for StorageMap<Type>

where Type: Mappable,

fn default() -> Self

Returns the “default value” for a type.

impl<Type> StorageInspect<Type> for StorageMap<Type>

where Type: Mappable, Type::Key: Eq + Hash, Type::OwnedKey: Eq + Hash + Borrow<Type::Key>,

type Error = Infallible

fn get( &self, key: &Type::Key, ) -> Result<Option<Cow<'_, Type::OwnedValue>>, Self::Error>

Retrieve Cow<Value> such as Key->Value.

fn contains_key(&self, key: &Type::Key) -> Result<bool, Self::Error>

Return true if there is a Key mapping to a value in the storage.

impl<Type> StorageMutate<Type> for StorageMap<Type>

where Type: Mappable, Type::Key: Eq + Hash, Type::OwnedKey: Eq + Hash + Borrow<Type::Key>,

fn replace( &mut self, key: &Type::Key, value: &Type::Value, ) -> Result<Option<Type::OwnedValue>, Self::Error>

Append Key->Value mapping to the storage.

fn take( &mut self, key: &Type::Key, ) -> Result<Option<Type::OwnedValue>, Self::Error>

Remove Key->Value mapping from the storage.

fn insert( &mut self, key: &<Type as Mappable>::Key, value: &<Type as Mappable>::Value, ) -> Result<(), Self::Error>

Append Key->Value mapping to the storage.

fn remove(&mut self, key: &<Type as Mappable>::Key) -> Result<(), Self::Error>

Remove Key->Value mapping from the storage.