pub struct OccupiedEntry<'a, K: Key, V> { /* private fields */ }
Expand description

A view into a occupied entry in a SecondaryMap. It is part of the Entry enum.

Implementations§

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impl<'a, K: Key, V> OccupiedEntry<'a, K, V>

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pub fn key(&self) -> K

Returns this entry’s key.

Examples
let mut sm = SlotMap::new();
let mut sec = SecondaryMap::new();

let k = sm.insert(1);
sec.insert(k, 10);
assert_eq!(sec.entry(k).unwrap().key(), k);
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pub fn remove_entry(self) -> (K, V)

Removes the entry from the slot map and returns the key and value.

Examples
let mut sm = SlotMap::new();
let mut sec = SecondaryMap::new();

let foo = sm.insert("foo");
sec.entry(foo).unwrap().or_insert("bar");

if let Some(Entry::Occupied(o)) = sec.entry(foo) {
    assert_eq!(o.remove_entry(), (foo, "bar"));
}
assert_eq!(sec.contains_key(foo), false);
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pub fn get(&self) -> &V

Gets a reference to the value in the entry.

Examples
let mut sm = SlotMap::new();
let mut sec = SecondaryMap::new();

let k = sm.insert(1);
sec.insert(k, 10);

if let Entry::Occupied(o) = sec.entry(k).unwrap() {
    assert_eq!(*o.get(), 10);
}
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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 which may outlive the destruction of the Entry value, see into_mut.

Examples
let mut sm = SlotMap::new();
let mut sec = SecondaryMap::new();

let k = sm.insert(1);
sec.insert(k, 10);
if let Entry::Occupied(mut o) = sec.entry(k).unwrap() {
    *o.get_mut() = 20;
}
assert_eq!(sec[k], 20);
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pub fn into_mut(self) -> &'a mut V

Converts the OccupiedEntry into a mutable reference to the value in the entry with a lifetime bound to the map itself.

If you need multiple references to the OccupiedEntry, see get_mut.

Examples
let mut sm = SlotMap::new();
let mut sec = SecondaryMap::new();

let k = sm.insert(0);
sec.insert(k, 0);

let r;
if let Entry::Occupied(o) = sec.entry(k).unwrap() {
    r = o.into_mut(); // v outlives the entry.
} else {
    r = sm.get_mut(k).unwrap();
}
*r = 1;
assert_eq!((sm[k], sec[k]), (0, 1));
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pub fn insert(&mut self, value: V) -> V

Sets the value of the entry, and returns the entry’s old value.

Examples
let mut sm = SlotMap::new();
let mut sec = SecondaryMap::new();

let k = sm.insert(1);
sec.insert(k, 10);

if let Entry::Occupied(mut o) = sec.entry(k).unwrap() {
    let v = o.insert(20);
    assert_eq!(v, 10);
    assert_eq!(*o.get(), 20);
}
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pub fn remove(self) -> V

Takes the value out of the entry, and returns it.

Examples

let mut sm = SlotMap::new();
let mut sec = SecondaryMap::new();

let k = sm.insert(1);
sec.insert(k, 10);

if let Entry::Occupied(mut o) = sec.entry(k).unwrap() {
    assert_eq!(o.remove(), 10);
    assert_eq!(sec.contains_key(k), false);
}

Trait Implementations§

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impl<'a, K: Debug + Key, V: Debug> Debug for OccupiedEntry<'a, K, V>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<'a, K, V> RefUnwindSafe for OccupiedEntry<'a, K, V>
where V: RefUnwindSafe,

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impl<'a, K, V> Send for OccupiedEntry<'a, K, V>
where V: Send,

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impl<'a, K, V> Sync for OccupiedEntry<'a, K, V>
where V: Sync,

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impl<'a, K, V> Unpin for OccupiedEntry<'a, K, V>

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impl<'a, K, V> !UnwindSafe for OccupiedEntry<'a, K, V>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.