Struct Labels 

pub struct Labels(/* private fields */);

Intrinsic-fact map. See module docs and SRD-0005.

Implementations

impl Labels

pub fn new() -> Self

Empty label map.

pub fn insert(&mut self, key: LabelKey, value: LabelValue) -> Option<LabelValue>

Insert a label. Returns the previous value for key, if any.

pub fn get(&self, key: &LabelKey) -> Option<&LabelValue>

Look up a label.

pub fn iter(&self) -> impl Iterator<Item = (&LabelKey, &LabelValue)>

Sorted-by-key iterator over (key, value) pairs.

pub fn keys(&self) -> impl Iterator<Item = &LabelKey>

Key-only iterator, sorted.

pub fn len(&self) -> usize

Number of labels.

pub fn is_empty(&self) -> bool

true when no labels are set.

pub fn contains_key(&self, key: &LabelKey) -> bool

Key-membership test.

Trait Implementations

impl Clone for Labels

fn clone(&self) -> Labels

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Labels

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

Formats the value using the given formatter.

impl Default for Labels

fn default() -> Labels

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Labels

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl FromIterator<(LabelKey, LabelValue)> for Labels

fn from_iter<I: IntoIterator<Item = (LabelKey, LabelValue)>>(iter: I) -> Self

Creates a value from an iterator.

impl PartialEq for Labels

fn eq(&self, other: &Labels) -> 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 Serialize for Labels

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Labels

impl StructuralPartialEq for Labels