Trait num::Zero
source · pub trait Zero: Sized + Add<Output = Self> {
// Required methods
fn zero() -> Self;
fn is_zero(&self) -> bool;
// Provided method
fn set_zero(&mut self) { ... }
}
Expand description
Defines an additive identity element for Self.
§Laws
a + 0 = a ∀ a ∈ Self
0 + a = a ∀ a ∈ Self
Returns the additive identity element of Self, 0.
§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.
Sets self to the additive identity element of Self, 0.