Struct nom::lib::std::collections::btree_map::VacantEntry 1.0.0[−][src]
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.
Methods
impl<'a, K, V> VacantEntry<'a, K, V> where
K: Ord,
[src]
impl<'a, K, V> VacantEntry<'a, K, V> where
K: Ord,
ⓘImportant traits for &'a mut Rpub fn key(&self) -> &K
1.10.0[src]
ⓘImportant traits for &'a mut R
pub fn key(&self) -> &K
1.10.0
[src]Gets a reference to the key that would be used when inserting a value through the VacantEntry.
Examples
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
1.12.0[src]
pub fn into_key(self) -> K
1.12.0
[src]Take ownership of the key.
Examples
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(); }
ⓘImportant traits for &'a mut Rpub fn insert(self, value: V) -> &'a mut V
[src]
ⓘImportant traits for &'a mut R
pub 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 std::collections::BTreeMap; let mut count: BTreeMap<&str, usize> = BTreeMap::new(); // count the number of occurrences of letters in the vec for x in vec!["a","b","a","c","a","b"] { *count.entry(x).or_insert(0) += 1; } assert_eq!(count["a"], 3);
Trait Implementations
impl<'a, K, V> Debug for VacantEntry<'a, K, V> where
K: 'a + Ord + Debug,
V: 'a,
1.12.0[src]
impl<'a, K, V> Debug for VacantEntry<'a, K, V> where
K: 'a + Ord + Debug,
V: 'a,
1.12.0
[src]Auto Trait Implementations
impl<'a, K, V> Send for VacantEntry<'a, K, V> where
K: Send,
V: Send,
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> Sync for VacantEntry<'a, K, V> where
K: Sync,
V: Sync,