Struct prefix_trie::map::OccupiedEntry

pub struct OccupiedEntry<'a, P, T> { /* private fields */ }

A mutable view into an occupied entry. An occupied entry represents a node that is already present on the tree.

Implementations

impl<'a, P, T> OccupiedEntry<'a, P, T>

pub fn key(&self) -> &P

Gets a reference to the key in the entry.

use prefix_trie::map::Entry;
let mut pm: PrefixMap<ipnet::Ipv4Net, _> = PrefixMap::new();
pm.insert("192.168.1.0/24".parse()?, 1);
match pm.entry("192.168.1.0/24".parse()?) {
    Entry::Occupied(e) => assert_eq!(e.key(), &"192.168.1.0/24".parse()?),
    Entry::Vacant(_) => unreachable!(),
}

pub fn get(&self) -> &T

Gets a reference to the value in the entry.

use prefix_trie::map::Entry;

let mut pm: PrefixMap<ipnet::Ipv4Net, _> = PrefixMap::new();
pm.insert("192.168.1.0/24".parse()?, 1);
match pm.entry("192.168.1.0/24".parse()?) {
    Entry::Occupied(e) => assert_eq!(e.get(), &1),
    Entry::Vacant(_) => unreachable!(),
}

pub fn get_mut(&mut self) -> &mut T

Gets a mutable reference to the value in the entry.

use prefix_trie::map::Entry;

let mut pm: PrefixMap<ipnet::Ipv4Net, _> = PrefixMap::new();
pm.insert("192.168.1.0/24".parse()?, 1);
match pm.entry("192.168.1.0/24".parse()?) {
    Entry::Occupied(mut e) => *e.get_mut() += 1,
    Entry::Vacant(_) => unreachable!(),
}
assert_eq!(pm.get(&"192.168.1.0/24".parse()?), Some(&2));

pub fn insert(&mut self, value: T) -> T

Insert a new value into the entry, returning the old value.

use prefix_trie::map::Entry;

let mut pm: PrefixMap<ipnet::Ipv4Net, _> = PrefixMap::new();
pm.insert("192.168.1.0/24".parse()?, 1);
match pm.entry("192.168.1.0/24".parse()?) {
    Entry::Occupied(mut e) => assert_eq!(e.insert(10), 1),
    Entry::Vacant(_) => unreachable!(),
}
assert_eq!(pm.get(&"192.168.1.0/24".parse()?), Some(&10));

pub fn remove(&mut self) -> T

Remove the current value and return it.

use prefix_trie::map::Entry;

let mut pm: PrefixMap<ipnet::Ipv4Net, i32> = PrefixMap::new();
pm.insert("192.168.1.0/24".parse()?, 1);
match pm.entry("192.168.1.0/24".parse()?) {
    Entry::Occupied(mut e) => assert_eq!(e.remove(), 1),
    Entry::Vacant(_) => unreachable!(),
}
assert_eq!(pm.get(&"192.168.1.0/24".parse()?), None);