vortex_array/arrays/constant/compute/
cast.rs

1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: Copyright the Vortex contributors
3
4use vortex_dtype::DType;
5use vortex_error::VortexResult;
6
7use crate::arrays::{ConstantArray, ConstantVTable};
8use crate::compute::{CastKernel, CastKernelAdapter};
9use crate::{ArrayRef, IntoArray, register_kernel};
10
11impl CastKernel for ConstantVTable {
12    fn cast(&self, array: &ConstantArray, dtype: &DType) -> VortexResult<Option<ArrayRef>> {
13        match array.scalar().cast(dtype) {
14            Ok(scalar) => Ok(Some(ConstantArray::new(scalar, array.len()).into_array())),
15            Err(_e) => Ok(None),
16        }
17    }
18}
19
20register_kernel!(CastKernelAdapter(ConstantVTable).lift());
21
22#[cfg(test)]
23mod tests {
24    use rstest::rstest;
25    use vortex_scalar::Scalar;
26
27    use crate::IntoArray;
28    use crate::arrays::ConstantArray;
29    use crate::compute::conformance::cast::test_cast_conformance;
30
31    #[rstest]
32    #[case(ConstantArray::new(Scalar::from(42u32), 5).into_array())]
33    #[case(ConstantArray::new(Scalar::from(-100i32), 10).into_array())]
34    #[case(ConstantArray::new(Scalar::from(3.5f32), 3).into_array())]
35    #[case(ConstantArray::new(Scalar::from(true), 7).into_array())]
36    #[case(ConstantArray::new(Scalar::null_typed::<i32>(), 4).into_array())]
37    #[case(ConstantArray::new(Scalar::from(255u8), 1).into_array())]
38    fn test_cast_constant_conformance(#[case] array: crate::ArrayRef) {
39        test_cast_conformance(array.as_ref());
40    }
41}
vortex_array/arrays/constant/compute/cast.rs

vortex_array/arrays/constant/compute/
cast.rs
