[−][src]Enum serde_json::map::Entry
A view into a single entry in a map, which may either be vacant or occupied.
This enum is constructed from the entry
method on Map
.
Variants
Vacant(VacantEntry<'a>)
A vacant Entry.
Occupied(OccupiedEntry<'a>)
An occupied Entry.
Methods
impl<'a> Entry<'a>
[src]
impl<'a> Entry<'a>
pub fn key(&self) -> &String
[src]
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");
pub fn or_insert(self, default: Value) -> &'a mut Value
[src]
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);
pub fn or_insert_with<F>(self, default: F) -> &'a mut Value where
F: FnOnce() -> Value,
[src]
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());
Auto Trait Implementations
Blanket Implementations
impl<T> From for T
[src]
impl<T> From for T
impl<T, U> Into for T where
U: From<T>,
[src]
impl<T, U> Into for T where
U: From<T>,
impl<T, U> TryFrom for T where
T: From<U>,
[src]
impl<T, U> TryFrom for T where
T: From<U>,
type Error = !
try_from
)The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
[src]
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
try_from
)Performs the conversion.
impl<T> Borrow for T where
T: ?Sized,
[src]
impl<T> Borrow for T where
T: ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
[src]
impl<T> BorrowMut for T where
T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
[src]
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
impl<T, U> TryInto for T where
U: TryFrom<T>,
[src]
impl<T, U> TryInto for T where
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
try_from
)The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
[src]
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
try_from
)Performs the conversion.
impl<T> Any for T where
T: 'static + ?Sized,
[src]
impl<T> Any for T where
T: 'static + ?Sized,
fn get_type_id(&self) -> TypeId
[src]
fn get_type_id(&self) -> TypeId
🔬 This is a nightly-only experimental API. (get_type_id
)
this method will likely be replaced by an associated static
Gets the TypeId
of self
. Read more