pub trait One: Sized + Mul<Self, Output = Self> {
fn one() -> Self;
}Defines a multiplicative identity element for Self.
fn one() -> Self
Returns the multiplicative identity element of Self, 1.
a * 1 = a ∀ a ∈ Self
1 * a = a ∀ a ∈ Self
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.
impl One for usizeimpl One for u8impl One for u16impl One for u32impl One for u64impl One for isizeimpl One for i8impl One for i16impl One for i32impl One for i64impl One for f32impl One for f64