Struct ez_jsonrpc_types::map::VacantEntry
source · pub struct VacantEntry<'a, T> { /* private fields */ }
Expand description
A vacant Entry. It is part of the Entry
enum.
Implementations§
source§impl<'a, T> VacantEntry<'a, T>
impl<'a, T> VacantEntry<'a, T>
sourcepub fn key(&self) -> &String
pub fn key(&self) -> &String
Gets a reference to the key that would be used when inserting a value through the VacantEntry.
§Examples
use serde_json::map::Entry;
let mut map = serde_json::Map::new();
match map.entry("serde") {
Entry::Vacant(vacant) => {
assert_eq!(vacant.key(), &"serde");
}
Entry::Occupied(_) => unimplemented!(),
}
sourcepub fn insert(self, value: T) -> &'a mut T
pub fn insert(self, value: T) -> &'a mut T
Sets the value of the entry with the VacantEntry’s key, and returns a mutable reference to it.
§Examples
use serde_json::map::Entry;
let mut map = serde_json::Map::new();
match map.entry("serde") {
Entry::Vacant(vacant) => {
vacant.insert(json!("hoho"));
}
Entry::Occupied(_) => unimplemented!(),
}
Auto Trait Implementations§
impl<'a, T> Freeze for VacantEntry<'a, T>
impl<'a, T> RefUnwindSafe for VacantEntry<'a, T>where
T: RefUnwindSafe,
impl<'a, T> Send for VacantEntry<'a, T>where
T: Send,
impl<'a, T> Sync for VacantEntry<'a, T>where
T: Sync,
impl<'a, T> Unpin for VacantEntry<'a, T>
impl<'a, T> !UnwindSafe for VacantEntry<'a, T>
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