Struct OccupiedEntryRef 

pub struct OccupiedEntryRef<'a, 'b, K, Q, V, S, A = Global>
where
    A: Allocator,
    Q: ?Sized,
{ /* private fields */ }

A view into an occupied entry in a HashMap. It is part of the EntryRef enum.

Examples

use rune::alloc::hash_map::{EntryRef, HashMap, OccupiedEntryRef};
use rune::alloc::prelude::*;

let mut map = HashMap::new();

map.try_extend([
    ("a".try_to_owned()?, 10),
    ("b".try_to_owned()?, 20),
    ("c".try_to_owned()?, 30)
])?;

let key = String::try_from("a")?;
let _entry_o: OccupiedEntryRef<_, _, _, _> = map.entry_ref(&key).try_insert(100)?;
assert_eq!(map.len(), 3);

// Existing key (insert and update)
match map.entry_ref("a") {
    EntryRef::Vacant(_) => unreachable!(),
    EntryRef::Occupied(mut view) => {
        assert_eq!(view.get(), &100);
        let v = view.get_mut();
        *v *= 10;
        assert_eq!(view.insert(1111), 1000);
    }
}

assert_eq!(map["a"], 1111);
assert_eq!(map.len(), 3);

// Existing key (take)
match map.entry_ref("c") {
    EntryRef::Vacant(_) => unreachable!(),
    EntryRef::Occupied(view) => {
        assert_eq!(view.remove_entry(), ("c".try_to_owned()?, 30));
    }
}
assert_eq!(map.get("c"), None);
assert_eq!(map.len(), 2);