Struct Labelset

pub struct Labelset { /* private fields */ }

A set of key-value labels that can be installed as the current label set.

Implementations

impl Labelset

pub fn new() -> Self

Create a new label set.

pub fn with_capacity(capacity: usize) -> Self

Create a new label set with the specified capacity.

pub fn clone_from_current() -> Self

Create a new label set by cloning the current one, if it exists, or creating a new one otherwise.

pub fn try_clone_from_current() -> Option<Self>

Create a new label set by cloning the current one, if it exists,

pub fn enter<F, Ret>(&mut self, f: F) -> Ret

where F: FnOnce() -> Ret,

Run a function with this set of labels applied.

pub fn set<K, V>(&mut self, key: K, value: V)

where K: AsRef<[u8]>, V: AsRef<[u8]>,

Adds the specified key-value pair to the label set.

pub fn delete<K>(&mut self, key: K)

where K: AsRef<[u8]>,

Deletes the specified label, if it exists, from the label set.

pub fn get<K>(&self, key: K) -> Option<&[u8]>

where K: AsRef<[u8]>,

Gets the label corresponding to a key on the given label set, or None if no such label exists.

Trait Implementations

impl Clone for Labelset

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Labelset

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

Formats the value using the given formatter.

impl Default for Labelset

fn default() -> Self

Returns the “default value” for a type.

impl Drop for Labelset

fn drop(&mut self)

Executes the destructor for this type.

impl<K, V> Extend<(K, V)> for Labelset

where K: AsRef<[u8]>, V: AsRef<[u8]>,

fn extend<T: IntoIterator<Item = (K, V)>>(&mut self, iter: T)

Extends a collection with the contents of an iterator.

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl Send for Labelset