Struct VacantEntry
pub struct VacantEntry<'a, VE>where
VE: ValueEncoding,{ /* private fields */ }Expand description
A view into a single empty location in a MetadataMap.
This struct is returned as part of the Entry enum.
Implementations§
§impl<'a, VE> VacantEntry<'a, VE>where
VE: ValueEncoding,
impl<'a, VE> VacantEntry<'a, VE>where
VE: ValueEncoding,
pub fn key(&self) -> &MetadataKey<VE>
pub fn key(&self) -> &MetadataKey<VE>
Returns a reference to the entry’s key
pub fn into_key(self) -> MetadataKey<VE>
pub fn into_key(self) -> MetadataKey<VE>
Take ownership of the key
pub fn insert(self, value: MetadataValue<VE>) -> &'a mut MetadataValue<VE>
pub fn insert(self, value: MetadataValue<VE>) -> &'a mut MetadataValue<VE>
Insert the value into the entry.
The value will be associated with this entry’s key. A mutable reference to the inserted value will be returned.
pub fn insert_entry(self, value: MetadataValue<VE>) -> OccupiedEntry<'a, Ascii>
pub fn insert_entry(self, value: MetadataValue<VE>) -> OccupiedEntry<'a, Ascii>
Insert the value into the entry.
The value will be associated with this entry’s key. The new
OccupiedEntry is returned, allowing for further manipulation.
Trait Implementations§
Auto Trait Implementations§
impl<'a, VE> !Freeze for VacantEntry<'a, VE>
impl<'a, VE> RefUnwindSafe for VacantEntry<'a, VE>where
VE: RefUnwindSafe,
impl<'a, VE> Send for VacantEntry<'a, VE>where
VE: Send,
impl<'a, VE> Sync for VacantEntry<'a, VE>where
VE: Sync,
impl<'a, VE> Unpin for VacantEntry<'a, VE>where
VE: Unpin,
impl<'a, VE> !UnwindSafe for VacantEntry<'a, VE>
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