Trait sp_runtime::traits::One

source · [−]
pub trait One: Mul<Self, Output = Self> {
    fn one() -> Self;

    fn set_one(&mut self) { ... }

    fn is_one(&self) -> bool
    where
        Self: PartialEq<Self>,
    { ... }
}
Expand description

Defines a multiplicative identity element for Self.

Laws

a * 1 = a       ∀ a ∈ Self
1 * a = a       ∀ a ∈ Self

Required methods

Returns the multiplicative identity element of Self, 1.

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.

Provided methods

Sets self to the multiplicative identity element of Self, 1.

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

Implementors

impl<T, D: DimName> One for OMatrix<T, D, D> where
    T: Scalar + Zero + One + ClosedMul + ClosedAdd,
    DefaultAllocator: Allocator<T, D, D>, 

impl<T, const D: usize> One for Rotation<T, D> where
    T: Scalar + Zero + One + ClosedAdd + ClosedMul, 

impl<T: SimdRealField> One for Quaternion<T> where
    T::Element: SimdRealField, 

impl<T: SimdRealField> One for UnitQuaternion<T> where
    T::Element: SimdRealField, 

impl<T: SimdRealField> One for DualQuaternion<T> where
    T::Element: SimdRealField, 

impl<T: SimdRealField> One for UnitDualQuaternion<T> where
    T::Element: SimdRealField, 

impl<T: SimdRealField> One for UnitComplex<T> where
    T::Element: SimdRealField, 

impl<T: Scalar + Zero + ClosedAdd, const D: usize> One for Translation<T, D>

impl<T: SimdRealField, R: AbstractRotation<T, D>, const D: usize> One for Isometry<T, R, D> where
    T::Element: SimdRealField, 

impl<T: SimdRealField, R, const D: usize> One for Similarity<T, R, D> where
    T::Element: SimdRealField,
    R: AbstractRotation<T, D>, 

impl<T: RealField, C: TCategory, const D: usize> One for Transform<T, C, D> where
    Const<D>: DimNameAdd<U1>,
    DefaultAllocator: Allocator<T, DimNameSum<Const<D>, U1>, DimNameSum<Const<D>, U1>>, 

impl One for BigInt

impl One for BigUint

impl<T: Clone + Num> One for Complex<T>

impl<T: Clone + Integer> One for Ratio<T>

impl One for AutoSimd<[i8; 2]>

impl One for AutoSimd<[i8; 4]>

impl One for AutoSimd<[i8; 8]>

impl One for AutoSimd<[u8; 2]>

impl One for AutoSimd<[u8; 4]>

impl One for AutoSimd<[u8; 8]>