Trait num::Zero [] [src]

pub trait Zero: Add<Self, Output = Self> {
    fn zero() -> Self;
fn is_zero(&self) -> bool; }

Defines an additive identity element for Self.

Required Methods

Returns the additive identity element of Self, 0.

Laws

a + 0 = a       ∀ a ∈ Self
0 + 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.

Returns true if self is equal to the additive identity.

Implementations on Foreign Types

impl Zero for i16
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impl Zero for u32
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impl Zero for i8
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impl Zero for i32
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impl Zero for usize
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impl Zero for isize
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impl<T> Zero for Wrapping<T> where
    T: Zero,
    Wrapping<T>: Add<Wrapping<T>>,
    <Wrapping<T> as Add<Wrapping<T>>>::Output == Wrapping<T>, 
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impl Zero for i64
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impl Zero for f32
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impl Zero for u16
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impl Zero for u8
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impl Zero for f64
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impl Zero for u64
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impl<T> Zero for Ratio<T> where
    T: Clone + Integer
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Implementors