Trait num::One

pub trait One: Mul<Self, Output = Self> {
    fn one() -> Self;
}

Defines a multiplicative identity element for Self.

Required Methods

fn one() -> Self

Returns the multiplicative identity element of Self, 1.

Laws

a * 1 = a       ∀ a ∈ Self
1 * a = a       ∀ a ∈ Self

Purity

This function should return the same result at all times regardless of external mutable state, for example values stored in TLS or in static muts.

Implementations on Foreign Types

impl One for f32

fn one() -> f32

impl One for isize

fn one() -> isize

impl One for i32

fn one() -> i32

impl One for i16

fn one() -> i16

impl One for u8

fn one() -> u8

impl One for i8

fn one() -> i8

impl One for f64

fn one() -> f64

impl One for i64

fn one() -> i64

impl One for u32

fn one() -> u32

impl One for usize

fn one() -> usize

impl One for u64

fn one() -> u64

impl One for u16

fn one() -> u16

impl<T> One for Wrapping<T> where
    T: One,
    Wrapping<T>: Mul<Wrapping<T>>,
    <Wrapping<T> as Mul<Wrapping<T>>>::Output == Wrapping<T>, 

fn one() -> Wrapping<T>

impl<T> One for Ratio<T> where
    T: Clone + Integer, 

fn one() -> Ratio<T>

Implementors

• impl<T> One for Complex<T> where
    T: Clone + Num, 
• impl One for BigInt
• impl One for BigUint