Enum ResetHint 

#[non_exhaustive]
pub enum ResetHint {
    Unknown,
    Reset,
    NoReset,
    Gauge,
}

What is known about counter resets between this sample and the previous.

A histogram is usually a counter: buckets only grow. A reset — a process restart — has to be visible to rate(), and the scraper often knows without the database having to guess.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Unknown

Nothing is known; a reader must detect resets by comparing samples.

Reset

This is the first histogram after a counter reset.

NoReset

There was no reset between this sample and the previous one.

Gauge

A gauge histogram: counter resets do not apply.

Trait Implementations

impl Clone for ResetHint

fn clone(&self) -> ResetHint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ResetHint

impl Debug for ResetHint

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

Formats the value using the given formatter.

impl Default for ResetHint

fn default() -> ResetHint

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ResetHint

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ResetHint

impl PartialEq for ResetHint

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ResetHint

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ResetHint