Struct ByField 

pub struct ByField(pub Cow<'static, str>);

Group spans/events by the value of a particular field.

If a field by the contained name is found, its recorded value (usually its Debug value) is used as the grouping identifier. If the field is not found, an empty String is used.

Tuple Fields

0: Cow<'static, str>

Trait Implementations

impl Clone for ByField

fn clone(&self) -> ByField

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ByField

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

Formats the value using the given formatter.

impl Default for ByField

fn default() -> ByField

Returns the “default value” for a type.

impl EventGroup for ByField

type Id = String

The type of the timing event group.

fn group(&self, e: &Event<'_>) -> Self::Id

Extract the group for this event.

impl<T> From<T> for ByField

where T: Into<Cow<'static, str>>,

fn from(t: T) -> Self

Converts to this type from the input type.

impl PartialEq for ByField

fn eq(&self, other: &ByField) -> 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 SpanGroup for ByField

type Id = String

The type of the timing span group.

fn group(&self, a: &Attributes<'_>) -> Self::Id

Extract the group for this span’s attributes.

impl Eq for ByField

impl StructuralPartialEq for ByField