vortex_array/arrays/constant/compute/
cast.rs

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

vortex_array/arrays/constant/compute/
cast.rs
