Struct turbolift::serde_json::map::VacantEntry [−][src]
pub struct VacantEntry<'a> { /* fields omitted */ }
Expand description
A vacant Entry. It is part of the Entry
enum.
Implementations
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!(), }
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> RefUnwindSafe for VacantEntry<'a>
impl<'a> Send for VacantEntry<'a>
impl<'a> Sync for VacantEntry<'a>
impl<'a> Unpin for VacantEntry<'a>
impl<'a> !UnwindSafe for VacantEntry<'a>
Blanket Implementations
Mutably borrows from an owned value. Read more
Instruments this type with the provided Span
, returning an
Instrumented
wrapper. Read more
Instruments this type with the provided Span
, returning an
Instrumented
wrapper. Read more
type Output = T
type Output = T
Should always be Self
pub fn vzip(self) -> V
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more