pub struct VacantEntry<'a, K, V> where K: 'a, V: 'a, { /* fields omitted */ }
A view into a vacant entry in a BTreeMap. It is part of the Entry enum.
impl<'a, K, V> VacantEntry<'a, K, V> where
K: Ord, [src]
pub fn key(&self) -> &KⓘNotable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized,
type Output = <F as Future>::Output;
impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized,
type Item = <I as Iterator>::Item;
impl<R: Read + ?Sized, '_> Read for &'_ mut R
impl<W: Write + ?Sized, '_> Write for &'_ mut W
[src]1.10.0
Gets a reference to the key that would be used when inserting a value through the VacantEntry.
use std::collections::BTreeMap;
let mut map: BTreeMap<&str, usize> = BTreeMap::new();
assert_eq!(map.entry("poneyland").key(), &"poneyland");pub fn into_key(self) -> K[src]1.12.0
Take ownership of the key.
use std::collections::BTreeMap;
use std::collections::btree_map::Entry;
let mut map: BTreeMap<&str, usize> = BTreeMap::new();
if let Entry::Vacant(v) = map.entry("poneyland") {
v.into_key();
}pub fn insert(self, value: V) -> &'a mut VⓘNotable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized,
type Output = <F as Future>::Output;
impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized,
type Item = <I as Iterator>::Item;
impl<R: Read + ?Sized, '_> Read for &'_ mut R
impl<W: Write + ?Sized, '_> Write for &'_ mut W
[src]
Sets the value of the entry with the VacantEntry's key, and returns a mutable reference to it.
use std::collections::BTreeMap;
use std::collections::btree_map::Entry;
let mut map: BTreeMap<&str, u32> = BTreeMap::new();
if let Entry::Vacant(o) = map.entry("poneyland") {
o.insert(37);
}
assert_eq!(map["poneyland"], 37);impl<'_, K, V> Debug for VacantEntry<'_, K, V> where
K: Ord + Debug, [src]1.12.0
impl<'a, K, V> RefUnwindSafe for VacantEntry<'a, K, V> where
K: RefUnwindSafe,
V: RefUnwindSafe, impl<'a, K, V> Send for VacantEntry<'a, K, V> where
K: Send,
V: Send, impl<'a, K, V> Sync for VacantEntry<'a, K, V> where
K: Sync,
V: Sync, impl<'a, K, V> Unpin for VacantEntry<'a, K, V> where
K: Unpin, impl<'a, K, V> !UnwindSafe for VacantEntry<'a, K, V>impl<T> Any for T where
T: 'static + ?Sized, [src]
impl<T> Borrow<T> for T where
T: ?Sized, [src]
fn borrow(&self) -> &TⓘNotable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized,
type Output = <F as Future>::Output;
impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized,
type Item = <I as Iterator>::Item;
impl<R: Read + ?Sized, '_> Read for &'_ mut R
impl<W: Write + ?Sized, '_> Write for &'_ mut W
[src]
impl<T> BorrowMut<T> for T where
T: ?Sized, [src]
fn borrow_mut(&mut self) -> &mut TⓘNotable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized,
type Output = <F as Future>::Output;
impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized,
type Item = <I as Iterator>::Item;
impl<R: Read + ?Sized, '_> Read for &'_ mut R
impl<W: Write + ?Sized, '_> Write for &'_ mut W
[src]
impl<T> From<T> for T[src]
impl<T, U> Into<U> for T where
U: From<T>, [src]
impl<T, U> TryFrom<U> for T where
U: Into<T>, [src]
type Error = InfallibleThe type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>, [src]
© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html