Enum lair_keystore::dependencies::serde_json::map::Entry
source · [−]pub enum Entry<'a> {
Vacant(VacantEntry<'a>),
Occupied(OccupiedEntry<'a>),
}
Expand description
Variants
Vacant(VacantEntry<'a>)
A vacant Entry.
Occupied(OccupiedEntry<'a>)
An occupied Entry.
Implementations
sourceimpl<'a> Entry<'a>
impl<'a> Entry<'a>
sourcepub fn key(&self) -> &String
pub fn key(&self) -> &String
Returns a reference to this entry’s key.
Examples
let mut map = serde_json::Map::new();
assert_eq!(map.entry("serde").key(), &"serde");
sourcepub fn or_insert(self, default: Value) -> &'a mut Value
pub fn or_insert(self, default: Value) -> &'a mut Value
Ensures a value is in the entry by inserting the default if empty, and returns a mutable reference to the value in the entry.
Examples
let mut map = serde_json::Map::new();
map.entry("serde").or_insert(json!(12));
assert_eq!(map["serde"], 12);
sourcepub fn or_insert_with<F>(self, default: F) -> &'a mut Value where
F: FnOnce() -> Value,
pub fn or_insert_with<F>(self, default: F) -> &'a mut Value where
F: FnOnce() -> Value,
Ensures a value is in the entry by inserting the result of the default function if empty, and returns a mutable reference to the value in the entry.
Examples
let mut map = serde_json::Map::new();
map.entry("serde").or_insert_with(|| json!("hoho"));
assert_eq!(map["serde"], "hoho".to_owned());
sourcepub fn and_modify<F>(self, f: F) -> Entry<'a> where
F: FnOnce(&mut Value),
pub fn and_modify<F>(self, f: F) -> Entry<'a> where
F: FnOnce(&mut Value),
Provides in-place mutable access to an occupied entry before any potential inserts into the map.
Examples
let mut map = serde_json::Map::new();
map.entry("serde")
.and_modify(|e| *e = json!("rust"))
.or_insert(json!("cpp"));
assert_eq!(map["serde"], "cpp");
map.entry("serde")
.and_modify(|e| *e = json!("rust"))
.or_insert(json!("cpp"));
assert_eq!(map["serde"], "rust");
Auto Trait Implementations
impl<'a> RefUnwindSafe for Entry<'a>
impl<'a> Send for Entry<'a>
impl<'a> Sync for Entry<'a>
impl<'a> Unpin for Entry<'a>
impl<'a> !UnwindSafe for Entry<'a>
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> Instrument for T
impl<T> Instrument for T
sourcefn instrument(self, span: Span) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
fn instrument(self, span: Span) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
T: Future, type Output = <T as Future>::Output;
sourcefn in_current_span(self) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
fn in_current_span(self) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
T: Future, type Output = <T as Future>::Output;
impl<T> Pointable for T
impl<T> Pointable for T
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
fn vzip(self) -> V
sourceimpl<T> WithSubscriber for T
impl<T> WithSubscriber for T
sourcefn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>ⓘNotable traits for WithDispatch<T>impl<T> Future for WithDispatch<T> where
T: Future, type Output = <T as Future>::Output;
where
S: Into<Dispatch>,
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>ⓘNotable traits for WithDispatch<T>impl<T> Future for WithDispatch<T> where
T: Future, type Output = <T as Future>::Output;
where
S: Into<Dispatch>,
T: Future, type Output = <T as Future>::Output;
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
sourcefn with_current_subscriber(self) -> WithDispatch<Self>ⓘNotable traits for WithDispatch<T>impl<T> Future for WithDispatch<T> where
T: Future, type Output = <T as Future>::Output;
fn with_current_subscriber(self) -> WithDispatch<Self>ⓘNotable traits for WithDispatch<T>impl<T> Future for WithDispatch<T> where
T: Future, type Output = <T as Future>::Output;
T: Future, type Output = <T as Future>::Output;
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more