Trait WeightElement 

pub trait WeightElement:
    Clone
    + Default
    + 'static {
    type Sum: NumericSize;

    const IS_UNIT: bool;

    // Required method
    fn to_sum(&self) -> Self::Sum;
}

Maps a weight element to its sum/metric type.

This decouples the per-element weight type from the accumulation type. For concrete weights (i32, f64), Sum is the same type. For the unit weight One, Sum = i32.

Required Associated Constants

const IS_UNIT: bool

Whether this is the unit weight type (One).

Required Associated Types

type Sum: NumericSize

The numeric type used for sums and comparisons.

Required Methods

fn to_sum(&self) -> Self::Sum

Convert this weight element to the sum type.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl WeightElement for f64

const IS_UNIT: bool = false

type Sum = f64

fn to_sum(&self) -> f64

impl WeightElement for i32

const IS_UNIT: bool = false

type Sum = i32

fn to_sum(&self) -> i32

Implementors

impl WeightElement for One

const IS_UNIT: bool = true

type Sum = i32