Struct scapegoat::map_types::OccupiedEntry
source · [−]Implementations
sourceimpl<'a, K: Ord + Default, V: Default, const N: usize> OccupiedEntry<'a, K, V, N>
impl<'a, K: Ord + Default, V: Default, const N: usize> OccupiedEntry<'a, K, V, N>
sourcepub fn key(&self) -> &K
pub fn key(&self) -> &K
Gets a reference to the key in the entry.
Examples
use scapegoat::SgMap;
let mut map = SgMap::<&str, usize, 2>::new();
map.entry("poneyland").or_insert(12);
assert_eq!(map.entry("poneyland").key(), &"poneyland");
sourcepub fn get(&self) -> &V
pub fn get(&self) -> &V
Gets a reference to the value in the entry.
Examples
use scapegoat::SgMap;
use scapegoat::map_types::Entry;
let mut map = SgMap::<&str, usize, 2>::new();
map.entry("poneyland").or_insert(12);
if let Entry::Occupied(o) = map.entry("poneyland") {
assert_eq!(o.get(), &12);
}
sourcepub fn get_mut(&mut self) -> &mut V
pub fn get_mut(&mut self) -> &mut V
Gets a mutable reference to the value in the entry.
If you need a reference to the OccupiedEntry
that may outlive the
destruction of the Entry
value, see into_mut
.
Examples
use scapegoat::SgMap;
use scapegoat::map_types::Entry;
let mut map = SgMap::<&str, usize, 2>::new();
map.entry("poneyland").or_insert(12);
assert_eq!(map["poneyland"], 12);
if let Entry::Occupied(mut o) = map.entry("poneyland") {
*o.get_mut() += 10;
assert_eq!(*o.get(), 22);
// We can use the same Entry multiple times.
*o.get_mut() += 2;
}
assert_eq!(map["poneyland"], 24);
sourcepub fn into_mut(self) -> &'a mut V
pub fn into_mut(self) -> &'a mut V
Converts the entry into a mutable reference to its value.
If you need multiple references to the OccupiedEntry
, see get_mut
.
Examples
use scapegoat::SgMap;
use scapegoat::map_types::Entry;
let mut map = SgMap::<&str, usize, 2>::new();
map.entry("poneyland").or_insert(12);
assert_eq!(map["poneyland"], 12);
if let Entry::Occupied(o) = map.entry("poneyland") {
*o.into_mut() += 10;
}
assert_eq!(map["poneyland"], 22);
sourcepub fn insert(&mut self, value: V) -> V
pub fn insert(&mut self, value: V) -> V
Sets the value of the entry with the OccupiedEntry
’s key,
and returns the entry’s old value.
Examples
use scapegoat::SgMap;
use scapegoat::map_types::Entry;
let mut map = SgMap::<&str, usize, 2>::new();
map.entry("poneyland").or_insert(12);
if let Entry::Occupied(mut o) = map.entry("poneyland") {
assert_eq!(o.insert(15), 12);
}
assert_eq!(map["poneyland"], 15);
sourcepub fn remove_entry(self) -> (K, V)
pub fn remove_entry(self) -> (K, V)
Take ownership of the key and value from the map.
Examples
use scapegoat::SgMap;
use scapegoat::map_types::Entry;
let mut map = SgMap::<&str, usize, 2>::new();
map.entry("poneyland").or_insert(12);
if let Entry::Occupied(o) = map.entry("poneyland") {
// We delete the entry from the map.
o.remove_entry();
}
// If now try to get the value, it will panic:
// println!("{}", map["poneyland"]);
sourcepub fn remove(self) -> V
pub fn remove(self) -> V
Takes the value of the entry out of the map, and returns it.
Examples
use scapegoat::SgMap;
use scapegoat::map_types::Entry;
let mut map = SgMap::<&str, usize, 2>::new();
map.entry("poneyland").or_insert(12);
if let Entry::Occupied(o) = map.entry("poneyland") {
assert_eq!(o.remove(), 12);
}
// If we try to get "poneyland"'s value, it'll panic:
// println!("{}", map["poneyland"]);
Auto Trait Implementations
impl<'a, K, V, const N: usize> RefUnwindSafe for OccupiedEntry<'a, K, V, N> where
K: RefUnwindSafe,
V: RefUnwindSafe,
impl<'a, K, V, const N: usize> Send for OccupiedEntry<'a, K, V, N> where
K: Send,
V: Send,
impl<'a, K, V, const N: usize> Sync for OccupiedEntry<'a, K, V, N> where
K: Sync,
V: Sync,
impl<'a, K, V, const N: usize> Unpin for OccupiedEntry<'a, K, V, N>
impl<'a, K, V, const N: usize> !UnwindSafe for OccupiedEntry<'a, K, V, N>
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcepub fn borrow_mut(&mut self) -> &mut T
pub fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more