Struct unc_sdk::store::iterable_map::VacantEntry

pub struct VacantEntry<'a, K, V, H>
where
    K: BorshSerialize + Ord,
    V: BorshSerialize,
    H: ToKey,
{ /* private fields */ }

View into a vacant entry in a IterableMap. This is part of the Entry enum.

Implementations

impl<'a, K, V, H> VacantEntry<'a, K, V, H>

where K: BorshSerialize + Ord, V: BorshSerialize + BorshDeserialize, H: ToKey,

pub fn key(&self) -> &K

Gets a reference to the key that would be used when inserting a value through the VacantEntry.

pub fn into_key(self) -> K

Take ownership of the key.

Examples

use unc_sdk::store::IterableMap;
use unc_sdk::store::iterable_map::Entry;

let mut map: IterableMap<String, u32> = IterableMap::new(b"m");

if let Entry::Vacant(v) = map.entry("poneyland".to_string()) {
    v.into_key();
}

pub fn insert(self, value: V) -> &'a mut V

where K: BorshDeserialize + Clone,

Sets the value of the entry with the VacantEntry’s key, and returns a mutable reference to it.

Examples

use unc_sdk::store::IterableMap;
use unc_sdk::store::iterable_map::Entry;

let mut map: IterableMap<String, u32> = IterableMap::new(b"m");

if let Entry::Vacant(o) = map.entry("poneyland".to_string()) {
    o.insert(37);
}
assert_eq!(map["poneyland"], 37);