Trait rand::distributions::weighted::alias_method::Weight

pub trait Weight: Sized + Copy + SampleUniform + PartialOrd + Add<Output = Self> + AddAssign + Sub<Output = Self> + SubAssign + Mul<Output = Self> + MulAssign + Div<Output = Self> + DivAssign + Sum {
    const MAX: Self;
    const ZERO: Self;

    fn try_from_u32_lossy(n: u32) -> Option<Self>;

    fn sum(values: &[Self]) -> Self { ... }
}

Trait that must be implemented for weights, that are used with WeightedIndex. Currently no guarantees on the correctness of WeightedIndex are given for custom implementations of this trait.

Associated Constants

const MAX: Self

Maximum number representable by Self.

const ZERO: Self

Element of Self equivalent to 0.

Required methods

fn try_from_u32_lossy(n: u32) -> Option<Self>

Produce an instance of Self from a u32 value, or return None if out of range. Loss of precision (where Self is a floating point type) is acceptable.

Provided methods

fn sum(values: &[Self]) -> Self

Sums all values in slice values.

Implementations on Foreign Types

impl Weight for f64

const MAX: Self

const ZERO: Self

fn try_from_u32_lossy(n: u32) -> Option<Self>

fn sum(values: &[Self]) -> Self

impl Weight for f32

const MAX: Self

const ZERO: Self

fn try_from_u32_lossy(n: u32) -> Option<Self>

fn sum(values: &[Self]) -> Self

impl Weight for usize

const MAX: Self

const ZERO: Self

fn try_from_u32_lossy(n: u32) -> Option<Self>

impl Weight for u128

const MAX: Self

const ZERO: Self

fn try_from_u32_lossy(n: u32) -> Option<Self>

impl Weight for u64

const MAX: Self

const ZERO: Self

fn try_from_u32_lossy(n: u32) -> Option<Self>

impl Weight for u32

const MAX: Self

const ZERO: Self

fn try_from_u32_lossy(n: u32) -> Option<Self>

impl Weight for u16

const MAX: Self

const ZERO: Self

fn try_from_u32_lossy(n: u32) -> Option<Self>

impl Weight for u8

const MAX: Self

const ZERO: Self

fn try_from_u32_lossy(n: u32) -> Option<Self>

impl Weight for isize

const MAX: Self

const ZERO: Self

fn try_from_u32_lossy(n: u32) -> Option<Self>

impl Weight for i128

const MAX: Self

const ZERO: Self

fn try_from_u32_lossy(n: u32) -> Option<Self>

impl Weight for i64

const MAX: Self

const ZERO: Self

fn try_from_u32_lossy(n: u32) -> Option<Self>

impl Weight for i32

const MAX: Self

const ZERO: Self

fn try_from_u32_lossy(n: u32) -> Option<Self>

impl Weight for i16

const MAX: Self

const ZERO: Self

fn try_from_u32_lossy(n: u32) -> Option<Self>

impl Weight for i8

const MAX: Self

const ZERO: Self

fn try_from_u32_lossy(n: u32) -> Option<Self>

Implementors