pub struct OccupiedEntry<'a> { /* private fields */ }
Expand description
An occupied Entry. It is part of the Entry
enum.
Implementations§
source§impl<'a> OccupiedEntry<'a>
impl<'a> OccupiedEntry<'a>
sourcepub fn key(&self) -> &String
pub fn key(&self) -> &String
Gets a reference to the key in the entry.
§Examples
use serde_json::map::Entry;
let mut map = serde_json::Map::new();
map.insert("serde".to_owned(), json!(12));
match map.entry("serde") {
Entry::Occupied(occupied) => {
assert_eq!(occupied.key(), &"serde");
}
Entry::Vacant(_) => unimplemented!(),
}
sourcepub fn get(&self) -> &Value
pub fn get(&self) -> &Value
Gets a reference to the value in the entry.
§Examples
use serde_json::map::Entry;
let mut map = serde_json::Map::new();
map.insert("serde".to_owned(), json!(12));
match map.entry("serde") {
Entry::Occupied(occupied) => {
assert_eq!(occupied.get(), 12);
}
Entry::Vacant(_) => unimplemented!(),
}
sourcepub fn get_mut(&mut self) -> &mut Value
pub fn get_mut(&mut self) -> &mut Value
Gets a mutable reference to the value in the entry.
§Examples
use serde_json::map::Entry;
let mut map = serde_json::Map::new();
map.insert("serde".to_owned(), json!([1, 2, 3]));
match map.entry("serde") {
Entry::Occupied(mut occupied) => {
occupied.get_mut().as_array_mut().unwrap().push(json!(4));
}
Entry::Vacant(_) => unimplemented!(),
}
assert_eq!(map["serde"].as_array().unwrap().len(), 4);
sourcepub fn into_mut(self) -> &'a mut Value
pub fn into_mut(self) -> &'a mut Value
Converts the entry into a mutable reference to its value.
§Examples
use serde_json::map::Entry;
let mut map = serde_json::Map::new();
map.insert("serde".to_owned(), json!([1, 2, 3]));
match map.entry("serde") {
Entry::Occupied(mut occupied) => {
occupied.into_mut().as_array_mut().unwrap().push(json!(4));
}
Entry::Vacant(_) => unimplemented!(),
}
assert_eq!(map["serde"].as_array().unwrap().len(), 4);
sourcepub fn insert(&mut self, value: Value) -> Value
pub fn insert(&mut self, value: Value) -> Value
Sets the value of the entry with the OccupiedEntry
’s key, and returns
the entry’s old value.
§Examples
use serde_json::map::Entry;
let mut map = serde_json::Map::new();
map.insert("serde".to_owned(), json!(12));
match map.entry("serde") {
Entry::Occupied(mut occupied) => {
assert_eq!(occupied.insert(json!(13)), 12);
assert_eq!(occupied.get(), 13);
}
Entry::Vacant(_) => unimplemented!(),
}
sourcepub fn remove(self) -> Value
pub fn remove(self) -> Value
Takes the value of the entry out of the map, and returns it.
§Examples
use serde_json::map::Entry;
let mut map = serde_json::Map::new();
map.insert("serde".to_owned(), json!(12));
match map.entry("serde") {
Entry::Occupied(occupied) => {
assert_eq!(occupied.remove(), 12);
}
Entry::Vacant(_) => unimplemented!(),
}
Auto Trait Implementations§
impl<'a> Freeze for OccupiedEntry<'a>
impl<'a> RefUnwindSafe for OccupiedEntry<'a>
impl<'a> Send for OccupiedEntry<'a>
impl<'a> Sync for OccupiedEntry<'a>
impl<'a> Unpin for OccupiedEntry<'a>
impl<'a> !UnwindSafe for OccupiedEntry<'a>
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more