Struct Tag 

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

A metric tag.

Implementations

impl Tag

pub const fn empty() -> Self

Creates a new, empty tag.

pub const fn from_static(s: &'static str) -> Self

Creates a new tag from a static string.

pub fn is_empty(&self) -> bool

Returns true if the tag is empty.

pub fn len(&self) -> usize

Returns the length of the tag, in bytes.

pub fn as_str(&self) -> &str

Returns a reference to the entire underlying tag string.

pub fn name(&self) -> &str

Gets the name of the tag.

For bare tags (e.g. production), this is simply the tag value itself. For key/value-style tags (e.g. service:web), this is the key part of the tag, or service based on the example.

pub fn value(&self) -> Option<&str>

Gets the value of the tag.

For bare tags (e.g. production), this always returns None. For key/value-style tags (e.g. service:web), this is the value part of the tag, or web based on the example.

pub fn as_borrowed(&self) -> BorrowedTag<'_>

Returns a borrowed version of the tag.

pub fn into_inner(self) -> MetaString

Consumes the tag and returns the inner MetaString.

Trait Implementations

impl AsRef<str> for Tag

fn as_ref(&self) -> &str

Converts this type into a shared reference of the (usually inferred) input type.

impl CheapMetaString for Tag

fn try_cheap_clone(&self) -> Option<MetaString>

Attempts to cheaply clone the string.

impl Clone for Tag

fn clone(&self) -> Tag

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Tag

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

Formats the value using the given formatter.

impl Display for Tag

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

Formats the value using the given formatter.

impl Extend<Tag> for TagSet

fn extend<T: IntoIterator<Item = Tag>>(&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<T> From<T> for Tag

where T: Into<MetaString>,

fn from(s: T) -> Self

Converts to this type from the input type.

impl From<Tag> for TagSet

fn from(tag: Tag) -> Self

Converts to this type from the input type.

impl FromIterator<Tag> for SharedTagSet

fn from_iter<T: IntoIterator<Item = Tag>>(iter: T) -> Self

Creates a value from an iterator.

impl FromIterator<Tag> for TagSet

fn from_iter<I: IntoIterator<Item = Tag>>(iter: I) -> Self

Creates a value from an iterator.

impl Hash for Tag

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Tag

fn cmp(&self, other: &Tag) -> 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 PartialEq<str> for Tag

fn eq(&self, other: &str) -> 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 PartialEq for Tag

fn eq(&self, other: &Tag) -> 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 PartialOrd for Tag

fn partial_cmp(&self, other: &Tag) -> 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 Tag

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 Tag

impl StructuralPartialEq for Tag