Enum NoExtraKeys 

pub enum NoExtraKeys {}

Default of no extra keys for events.

An enum with no values for convenient use as the default set of extra keys that an EventMetric can accept.

Note: There exist no values for this enum, it can never exist. It its equivalent to the never / ! type.

Trait Implementations

impl Clone for NoExtraKeys

fn clone(&self) -> NoExtraKeys

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NoExtraKeys

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

Formats the value using the given formatter.

impl ExtraKeys for NoExtraKeys

const ALLOWED_KEYS: &'static [&'static str]

List of allowed extra keys as strings.

fn into_ffi_extra(self) -> HashMap<String, String>

Convert the event extras into a hashmap of extra key to extra value.

impl Hash for NoExtraKeys

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 PartialEq for NoExtraKeys

fn eq(&self, other: &NoExtraKeys) -> 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 Copy for NoExtraKeys

impl Eq for NoExtraKeys

impl StructuralPartialEq for NoExtraKeys