Enum Expression

pub enum Expression {
    In(String, BTreeSet<String>),
    NotIn(String, BTreeSet<String>),
    Equal(String, String),
    NotEqual(String, String),
    Exists(String),
    DoesNotExist(String),
}

A selector expression with existing operations

Variants

In(String, BTreeSet<String>)

Key exists and in set:

let exp = Expression::In("foo".into(), ["bar".into(), "baz".into()].into());
assert_eq!(exp.to_string(), "foo in (bar,baz)");
let exp = Expression::In("foo".into(), ["bar".into(), "baz".into()].into_iter().collect());
assert_eq!(exp.to_string(), "foo in (bar,baz)");

NotIn(String, BTreeSet<String>)

Key does not exists or not in set:

let exp = Expression::NotIn("foo".into(), ["bar".into(), "baz".into()].into());
assert_eq!(exp.to_string(), "foo notin (bar,baz)");
let exp = Expression::NotIn("foo".into(), ["bar".into(), "baz".into()].into_iter().collect());
assert_eq!(exp.to_string(), "foo notin (bar,baz)");

Equal(String, String)

Key exists and is equal:

let exp = Expression::Equal("foo".into(), "bar".into());
assert_eq!(exp.to_string(), "foo=bar")

NotEqual(String, String)

Key does not exists or is not equal:

let exp = Expression::NotEqual("foo".into(), "bar".into());
assert_eq!(exp.to_string(), "foo!=bar")

Exists(String)

Key exists:

let exp = Expression::Exists("foo".into());
assert_eq!(exp.to_string(), "foo")

DoesNotExist(String)

Key does not exist:

let exp = Expression::DoesNotExist("foo".into());
assert_eq!(exp.to_string(), "!foo")

Trait Implementations

impl Clone for Expression

fn clone(&self) -> Expression

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Expression

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Expression

fn deserialize<__D>( __deserializer: __D, ) -> Result<Expression, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Expression

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

Perform conversion to string

impl From<Expression> for Selector

fn from(value: Expression) -> Selector

Converts to this type from the input type.

impl FromIterator<Expression> for Selector

fn from_iter<T>(iter: T) -> Selector

where T: IntoIterator<Item = Expression>,

Creates a value from an iterator.

impl IntoIterator for Expression

type IntoIter = IntoIter<<Expression as IntoIterator>::Item>

Which kind of iterator are we turning this into?

type Item = Expression

The type of the elements being iterated over.

fn into_iter(self) -> <Expression as IntoIterator>::IntoIter

Creates an iterator from a value.

impl PartialEq for Expression

fn eq(&self, other: &Expression) -> 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 SelectorExt for Expression

type Search = BTreeMap<String, String>

Collection type to compare with self

fn matches(&self, labels: &BTreeMap<String, String>) -> bool

Perform a match check on the arbitrary components like labels

impl Serialize for Expression

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl TryFrom<LabelSelectorRequirement> for Expression

type Error = ParseExpressionError

The type returned in the event of a conversion error.

fn try_from( requirement: LabelSelectorRequirement, ) -> Result<Expression, <Expression as TryFrom<LabelSelectorRequirement>>::Error>

Performs the conversion.

impl Eq for Expression

impl StructuralPartialEq for Expression