[][src]Trait bigdecimal::One

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

    fn is_one(&self) -> bool
    where
        Self: PartialEq<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.

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Provided methods

fn is_one(&self) -> bool where
    Self: PartialEq<Self>, 

Returns true if self is equal to the multiplicative identity.

For performance reasons, it's best to implement this manually. After a semver bump, this method will be required, and the where Self: PartialEq bound will be removed.

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Implementations on Foreign Types

impl One for BigInt[src]

impl One for BigUint[src]

impl One for i32[src]

fn is_one(&self) -> bool where
    Self: PartialEq<Self>, 
[src]

impl One for i8[src]

fn is_one(&self) -> bool where
    Self: PartialEq<Self>, 
[src]

impl One for f32[src]

fn is_one(&self) -> bool where
    Self: PartialEq<Self>, 
[src]

impl One for usize[src]

fn is_one(&self) -> bool where
    Self: PartialEq<Self>, 
[src]

impl One for u8[src]

fn is_one(&self) -> bool where
    Self: PartialEq<Self>, 
[src]

impl One for isize[src]

fn is_one(&self) -> bool where
    Self: PartialEq<Self>, 
[src]

impl One for i16[src]

fn is_one(&self) -> bool where
    Self: PartialEq<Self>, 
[src]

impl One for u64[src]

fn is_one(&self) -> bool where
    Self: PartialEq<Self>, 
[src]

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

fn is_one(&self) -> bool where
    Self: PartialEq<Self>, 
[src]

impl One for f64[src]

fn is_one(&self) -> bool where
    Self: PartialEq<Self>, 
[src]

impl One for i128[src]

fn is_one(&self) -> bool where
    Self: PartialEq<Self>, 
[src]

impl One for u128[src]

fn is_one(&self) -> bool where
    Self: PartialEq<Self>, 
[src]

impl One for i64[src]

fn is_one(&self) -> bool where
    Self: PartialEq<Self>, 
[src]

impl One for u32[src]

fn is_one(&self) -> bool where
    Self: PartialEq<Self>, 
[src]

impl One for u16[src]

fn is_one(&self) -> bool where
    Self: PartialEq<Self>, 
[src]

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Implementors

impl One for BigDecimal[src]

fn is_one(&self) -> bool where
    Self: PartialEq<Self>, 
[src]

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