Enum ink_storage::collections::stash::Entry

pub enum Entry<T> {
    Vacant(VacantEntry),
    Occupied(T),
}

An entry within the stash.

The vacant entries within a storage stash form a doubly linked list of vacant entries that is used to quickly re-use their vacant storage.

Variants

Vacant(VacantEntry)

A vacant entry that holds the index to the next and previous vacant entry.

Occupied(T)

An occupied entry that hold the value.

Implementations

impl<T> Entry<T>

pub fn is_occupied(&self) -> bool

Returns true if the entry is occupied.

pub fn is_vacant(&self) -> bool

Returns true if the entry is vacant.

Trait Implementations

impl<T: Debug> Debug for Entry<T>

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

Formats the value using the given formatter.

impl<T> Decode for Entry<T> where
    T: Decode,
    T: Decode, 

fn decode<__CodecInputEdqy: Input>(
    __codec_input_edqy: &mut __CodecInputEdqy
) -> Result<Self, Error>

Attempt to deserialise the value from input.

fn skip<I>(input: &mut I) -> Result<(), Error> where
    I: Input, 

Attempt to skip the encoded value from input.

fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type.

impl<T> Encode for Entry<T> where
    T: Encode,
    T: Encode, 

fn encode_to<__CodecOutputEdqy: Output + ?Sized>(
    &self,
    __codec_dest_edqy: &mut __CodecOutputEdqy
)

Convert self to a slice and append it to the destination.

fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding.

fn encode(&self) -> Vec<u8, Global>

Convert self to an owned vector.

fn using_encoded<R, F>(&self, f: F) -> R where
    F: FnOnce(&[u8]) -> R, 

Convert self to a slice and then invoke the given closure with it.

fn encoded_size(&self) -> usize

Calculates the encoded size.

impl<T> PackedLayout for Entry<T> where
    T: PackedLayout, 

fn pull_packed(&mut self, at: &Key)

Indicates to self that is has just been pulled from the storage.

fn push_packed(&self, at: &Key)

Indicates to self that it is about to be pushed to contract storage.

fn clear_packed(&self, at: &Key)

Indicates to self that it is about to be cleared from contract storage.

impl<T> SpreadLayout for Entry<T> where
    T: PackedLayout, 

const FOOTPRINT: u64

The footprint of the type.

const REQUIRES_DEEP_CLEAN_UP: bool

Indicates whether a type requires deep clean-up of its state meaning that a clean-up routine has to decode an entity into an instance in order to eventually recurse upon its tear-down. This is not required for the majority of primitive data types such as i32, however types such as storage::Box that might want to forward the clean-up procedure to their inner T require a deep clean-up.

fn pull_spread(ptr: &mut KeyPtr) -> Self

Pulls an instance of Self from the contract storage.

fn push_spread(&self, ptr: &mut KeyPtr)

Pushes an instance of Self to the contract storage.

fn clear_spread(&self, ptr: &mut KeyPtr)

Clears an instance of Self from the contract storage.

impl<T> TypeInfo for Entry<T> where
    T: TypeInfo + 'static,
    T: TypeInfo + 'static, 

type Identity = Self

The type identifying for which type info is provided.

fn type_info() -> Type

Returns the static type identifier for Self.

impl<T> EncodeLike<Entry<T>> for Entry<T> where
    T: Encode,
    T: Encode,