Struct OccupiedEntry 

pub struct OccupiedEntry<'a, K, V, S: Storage<ListMapLayout<K, V>>, I: Capacity> { /* private fields */ }

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

Implementations

impl<'a, K, V, S: Storage<ListMapLayout<K, V>>, I: Capacity> OccupiedEntry<'a, K, V, S, I>

pub fn key(&self) -> &K

Gets a reference to the key used to create the entry.

pub fn remove_entry(self) -> (K, V)

Take the ownership of the key and value from the map.

Examples

use coca::collections::InlineListMap;
use coca::collections::list_map::Entry;
 
let mut map = InlineListMap::<&'static str, u32, 4>::new();
 
map.entry("foobar").or_insert(12);
assert_eq!(map.get("foobar"), Some(&12));
 
if let Entry::Occupied(o) = map.entry("foobar") {
    o.remove_entry();
}
 
assert_eq!(map.contains_key("foobar"), false);

pub fn get(&self) -> &V

Gets a reference to the value in the entry.

Examples

use coca::collections::InlineListMap;
use coca::collections::list_map::Entry;
 
let mut map = InlineListMap::<&'static str, u32, 4>::new();
 
map.entry("foobar").or_insert(12);
assert_eq!(map.get("foobar"), Some(&12));
 
if let Entry::Occupied(o) = map.entry("foobar") {
    assert_eq!(o.get(), &12);
}

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 value which may outlive the Entry, see into_mut.

Examples

use coca::collections::InlineListMap;
use coca::collections::list_map::Entry;
 
let mut map = InlineListMap::<&'static str, u32, 4>::new();
 
map.entry("foobar").or_insert(12);
assert_eq!(map.get("foobar"), Some(&12));
 
if let Entry::Occupied(mut o) = map.entry("foobar") {
    *o.get_mut() += 10;
    assert_eq!(*o.get(), 22);
 
    // You can use the same Entry multiple times:
    *o.get_mut() += 2;
}
 
assert_eq!(map.get("foobar"), Some(&24));

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

use coca::collections::InlineListMap;
use coca::collections::list_map::Entry;
 
let mut map = InlineListMap::<&'static str, u32, 4>::new();
 
map.entry("foobar").or_insert(12);
assert_eq!(map.get("foobar"), Some(&12));
 
if let Entry::Occupied(o) = map.entry("foobar") {
    *o.into_mut() += 10;
}
 
assert_eq!(map.get("foobar"), Some(&22));

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

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

Examples

use coca::collections::InlineListMap;
use coca::collections::list_map::Entry;
 
let mut map = InlineListMap::<&'static str, u32, 4>::new();
 
map.entry("foobar").or_insert(12);
assert_eq!(map.get("foobar"), Some(&12));
 
if let Entry::Occupied(mut o) = map.entry("foobar") {
    assert_eq!(o.insert(15), 12);
}
 
assert_eq!(map.get("foobar"), Some(&15));

pub fn remove(self) -> V

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

Examples

use coca::collections::InlineListMap;
use coca::collections::list_map::Entry;
 
let mut map = InlineListMap::<&'static str, u32, 4>::new();
 
map.entry("foobar").or_insert(12);
assert_eq!(map.get("foobar"), Some(&12));
 
if let Entry::Occupied(o) = map.entry("foobar") {
    assert_eq!(o.remove(), 12);
}
 
assert_eq!(map.contains_key("foobar"), false);

pub fn replace_entry(self, value: V) -> (K, V)

Replaces the entry, returning the old key-value pair. The new key in the map will be the key used to create the entry.

Examples

use coca::collections::InlineListMap;
use coca::collections::list_map::Entry;
 
let mut map = InlineListMap::<&'static str, u32, 4>::new();
map.insert("foobar", 15);
 
if let Entry::Occupied(entry) = map.entry("foobar") {
    let (old_key, old_value) = entry.replace_entry(16);
     
    assert_eq!(old_key, "foobar");
    assert_eq!(old_value, 15);
}
 
assert_eq!(map.get("foobar"), Some(&16));

pub fn replace_key(self) -> K

Replaces the key in the map with the one used to create the entry.

This matters for key types that can be == without being identical.

Trait Implementations

impl<K: Debug, V: Debug, S: Storage<ListMapLayout<K, V>>, I: Capacity> Debug for OccupiedEntry<'_, K, V, S, I>

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

Formats the value using the given formatter.