Implement `cast` for `Unit<Vector<T, D, S>>`
Currently, `cast` is resolved via `Unit`'s `Deref` impl, which leads to it confusingly stripping the `Unit` from `UnitVector`s. Add an inherent impl which takes precedence, similar to the existing specialization for `UnitQuaternion`.
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@ -2186,3 +2186,28 @@ where
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}
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}
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}
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impl<T, D, S> Unit<Vector<T, D, S>>
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where
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T: Scalar,
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D: Dim,
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S: RawStorage<T, D, U1>,
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{
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/// Cast the components of `self` to another type.
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///
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/// # Example
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/// ```
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/// # use nalgebra::Vector3;
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/// let v = Vector3::<f64>::y_axis();
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/// let v2 = v.cast::<f32>();
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/// assert_eq!(v2, Vector3::<f32>::y_axis());
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/// ```
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pub fn cast<T2: Scalar>(self) -> Unit<OVector<T2, D>>
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where
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T: Scalar,
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OVector<T2, D>: SupersetOf<Vector<T, D, S>>,
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DefaultAllocator: Allocator<T2, D, U1>,
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{
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Unit::new_unchecked(crate::convert_ref(self.as_ref()))
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}
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}
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