Trait num::One
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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
Provided Methods
fn is_one(&self) -> bool where
Self: PartialEq<Self>,
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.
Implementations on Foreign Types
impl One for i8
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impl One for i64
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impl One for u8
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impl One for f64
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impl One for i32
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impl One for u32
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impl One for i16
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impl One for u16
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impl<T> One for Wrapping<T> where
T: One,
Wrapping<T>: Mul<Wrapping<T>>,
<Wrapping<T> as Mul<Wrapping<T>>>::Output == Wrapping<T>,
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T: One,
Wrapping<T>: Mul<Wrapping<T>>,
<Wrapping<T> as Mul<Wrapping<T>>>::Output == Wrapping<T>,
impl One for f32
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impl One for usize
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impl One for u64
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impl One for isize
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impl<T> One for Ratio<T> where
T: Clone + Integer,
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T: Clone + Integer,