Struct VacantEntry

pub struct VacantEntry<'a> { /* private fields */ }

A view into a vacant entry in a Mapping. It is part of the Entry enum.

Implementations

impl<'a> VacantEntry<'a>

pub fn key(&self) -> &Value

Gets a reference to the key that would be used when inserting a value through the VacantEntry.

pub fn into_key(self) -> Value

Takes ownership of the key, leaving the entry vacant.

pub fn insert(self, value: Value) -> &'a mut Value

Sets the value of the entry with the VacantEntry’s key, and returns a mutable reference to it.

Trait Implementations

impl<'a> Debug for VacantEntry<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.