Enum OneOrMany

pub enum OneOrMany<T> {
    One(T),
    Many(Vec<T>),
}

Represents either a single value, or multiple values of T. Useful for differentiating between an array of length 1 and a single value.

Variants

One(T)

A single instance of T.

Many(Vec<T>)

One or more instances of T.

Implementations

impl<T> OneOrMany<T>

pub fn is_many(&self) -> bool

Returns true if this OneOrMany<T> is a Many value.

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the values of OneOrMany<T>.

pub fn len(&self) -> usize

Returns the number of values in this OneOrMany<T>.

pub fn as_ref(&self) -> OneOrMany<&T>

Returns a OneOrMany<&T> that references this OneOrMany<T>.

impl<T> OneOrMany<T>

where T: Ord + Clone,

pub fn canonicalize(&mut self)

Canonicalizes self by:

• Transforming to ::One() if is_many() but len() == 1
• Sorting items if is_many()

impl<T> OneOrMany<T>

where T: PartialEq,

pub fn contains(&self, e: &T) -> bool

Returns true if this OneOrMany<T> contains the given element.

Trait Implementations

impl<T: Clone> Clone for OneOrMany<T>

fn clone(&self) -> OneOrMany<T>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Debug> Debug for OneOrMany<T>

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for OneOrMany<Name>

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> Deserialize<'de> for OneOrMany<EventScope>

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> Deserialize<'de> for OneOrMany<ExposeFromRef>

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> Deserialize<'de> for OneOrMany<OfferFromRef>

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> Deserialize<'de> for OneOrMany<OfferToRef>

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> Deserialize<'de> for OneOrMany<Path>

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'a, T: Display> Display for OneOrMany<T>

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

Formats the value using the given formatter.

impl<T> From<T> for OneOrMany<T>

fn from(item: T) -> Self

Converts to this type from the input type.

impl<T> FromIterator<T> for OneOrMany<T>

fn from_iter<I>(iter: I) -> Self

where I: IntoIterator<Item = T> + Sized,

Creates a value from an iterator.

impl<T> Into<Vec<T>> for OneOrMany<T>

fn into(self) -> Vec<T>

Converts this type into the (usually inferred) input type.

impl<'a, T> IntoIterator for &'a OneOrMany<T>

type Item = &'a T

The type of the elements being iterated over.

type IntoIter = Iter<'a, T>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Iter<'a, T>

Creates an iterator from a value.

impl<T> IntoIterator for OneOrMany<T>

type Item = T

The type of the elements being iterated over.

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?

fn into_iter(self) -> IntoIter<T>

Creates an iterator from a value.

impl<T: Ord> Ord for OneOrMany<T>

fn cmp(&self, other: &OneOrMany<T>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<T> PartialEq for OneOrMany<T>

where T: PartialEq,

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T: PartialOrd> PartialOrd for OneOrMany<T>

fn partial_cmp(&self, other: &OneOrMany<T>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for OneOrMany<Name>

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl Serialize for OneOrMany<EventScope>

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl Serialize for OneOrMany<ExposeFromRef>

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl Serialize for OneOrMany<OfferFromRef>

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl Serialize for OneOrMany<OfferToRef>

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl Serialize for OneOrMany<Path>

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl<T: Eq> Eq for OneOrMany<T>