Struct ValueSingleOrList 

pub struct ValueSingleOrList<T> { /* private fields */ }

A list like struct optimized for holding zero or one items.

Once more than one value has been added to this storage it will switch to using a Vec internally.

Implementations

impl<T: PartialEq> ValueSingleOrList<T>

pub fn single(&self) -> Option<&T>

Single contained value. Only valid if is_single is set.

pub fn list(&self) -> Option<&Vec<T>>

List of values.

pub fn has_list(&self) -> bool

If this struct is backed by a list.

pub fn is_single(&self) -> bool

If this struct contains only single value and storage was not promoted to a list.

pub fn add(&mut self, value: T)

Adds a value.

pub fn remove(&mut self, value: &T) -> bool

Removes a value.

Trait Implementations

impl<T> Default for ValueSingleOrList<T>

fn default() -> Self

Returns the “default value” for a type.