Struct cache_2q::VacantEntry
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pub struct VacantEntry<'a, K: 'a, V: 'a> { /* fields omitted */ }
Methods
impl<'a, K: 'a, V: 'a> VacantEntry<'a, K, V>
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fn key(&self) -> &K
Gets a reference to the key that would be used when inserting a value
through the VacantEntry
.
Examples
use cache_2q::{Cache, Entry}; let mut cache: Cache<&str, u32> = Cache::new(8); if let Entry::Vacant(v) = cache.entry("poneyland") { assert_eq!(v.key(), &"poneyland"); } else { panic!("Entry should be vacant"); }
fn into_key(self) -> K
Take ownership of the key.
Examples
use cache_2q::{Cache, Entry}; let mut cache: Cache<String, u32> = Cache::new(8); if let Entry::Vacant(v) = cache.entry("poneyland".into()) { assert_eq!(v.into_key(), "poneyland".to_string()); } else { panic!("Entry should be vacant"); }
impl<'a, K: 'a + Eq, V: 'a> VacantEntry<'a, K, V>
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fn insert(self, value: V) -> &'a mut V
Sets the value of the entry with the VacantEntry's key, and returns a mutable reference to it.
Examples
use cache_2q::{Cache, Entry}; let mut cache: Cache<&str, u32> = Cache::new(8); if let Entry::Vacant(o) = cache.entry("poneyland") { o.insert(37); } else { panic!("Entry should be vacant"); } assert_eq!(*cache.get("poneyland").unwrap(), 37);