Struct FirstValueF64Accumulator 

pub struct FirstValueF64Accumulator { /* private fields */ }

Accumulator for FIRST_VALUE aggregation on f64 values.

Implementations

impl FirstValueF64Accumulator

pub fn result_f64(&self) -> Option<f64>

Gets the result as f64.

Trait Implementations

impl Accumulator for FirstValueF64Accumulator

type Input = (f64, i64)

The input type for the aggregation.

type Output = Option<f64>

The output type produced by the aggregation.

fn add(&mut self, (value, timestamp): (f64, i64))

Adds a value to the accumulator.

fn merge(&mut self, other: &Self)

Merges another accumulator into this one.

fn result(&self) -> Option<f64>

Extracts the final result from the accumulator.

fn is_empty(&self) -> bool

Returns true if the accumulator is empty (no values added).

impl Archive for FirstValueF64Accumulator

where Option<i64>: Archive,

const COPY_OPTIMIZATION: CopyOptimization<Self>

An optimization flag that allows the bytes of this type to be copied directly to a writer instead of calling serialize.

type Archived = ArchivedFirstValueF64Accumulator

The archived representation of this type.

type Resolver = FirstValueF64AccumulatorResolver

The resolver for this type. It must contain all the additional information from serializing needed to make the archived type from the normal type.

fn resolve(&self, resolver: Self::Resolver, out: Place<Self::Archived>)

Creates the archived version of this value at the given position and writes it to the given output.

impl Clone for FirstValueF64Accumulator

fn clone(&self) -> FirstValueF64Accumulator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FirstValueF64Accumulator

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

Formats the value using the given formatter.

impl Default for FirstValueF64Accumulator

fn default() -> FirstValueF64Accumulator

Returns the “default value” for a type.

impl<__D: Fallible + ?Sized> Deserialize<FirstValueF64Accumulator, __D> for Archived<FirstValueF64Accumulator>

where Option<i64>: Archive, <Option<i64> as Archive>::Archived: Deserialize<Option<i64>, __D>,

fn deserialize( &self, deserializer: &mut __D, ) -> Result<FirstValueF64Accumulator, <__D as Fallible>::Error>

Deserializes using the given deserializer

impl PartialEq<ArchivedFirstValueF64Accumulator> for FirstValueF64Accumulator

where Option<i64>: Archive, <Option<i64> as Archive>::Archived: PartialEq<Option<i64>>,

fn eq(&self, other: &ArchivedFirstValueF64Accumulator) -> 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<FirstValueF64Accumulator> for ArchivedFirstValueF64Accumulator

where Option<i64>: Archive, <Option<i64> as Archive>::Archived: PartialEq<Option<i64>>,

fn eq(&self, other: &FirstValueF64Accumulator) -> 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<__S: Fallible + ?Sized> Serialize<__S> for FirstValueF64Accumulator

where Option<i64>: Serialize<__S>,

fn serialize( &self, serializer: &mut __S, ) -> Result<<Self as Archive>::Resolver, <__S as Fallible>::Error>

Writes the dependencies for the object and returns a resolver that can create the archived type.