Enum TimerLabelError 

#[non_exhaustive]
pub enum TimerLabelError {
    Empty,
    TooLong {
        actual_bytes: usize,
        max_bytes: usize,
    },
    SurroundingWhitespace,
    ControlCharacter {
        byte_index: usize,
        character: char,
    },
}

Invalid timer identity label.

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.

Empty

Labels must not be empty.

TooLong

Labels must fit the documented UTF-8 byte bound.

Fields

actual_bytes: usize

Encoded length of the rejected value.

max_bytes: usize

Maximum supported encoded length.

SurroundingWhitespace

Leading and trailing whitespace makes metric labels hard to distinguish.

ControlCharacter

Control characters are not portable operator labels.

Fields

byte_index: usize

UTF-8 byte offset of the rejected character.

character: char

Rejected control character.

Trait Implementations

impl Clone for TimerLabelError

fn clone(&self) -> TimerLabelError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TimerLabelError

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

Formats the value using the given formatter.

impl Display for TimerLabelError

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

Formats the value using the given formatter.

impl Eq for TimerLabelError

impl Error for TimerLabelError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

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

Provides type-based access to context intended for error reports.

impl PartialEq for TimerLabelError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for TimerLabelError