vortex-array 0.68.0

Vortex in memory columnar data format
Documentation 
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// SPDX-License-Identifier: Apache-2.0
// SPDX-FileCopyrightText: Copyright the Vortex contributors

use vortex_error::VortexResult;

use crate::ArrayRef;
use crate::IntoArray;
use crate::array::ArrayView;
use crate::arrays::Constant;
use crate::arrays::ConstantArray;
use crate::dtype::DType;
use crate::scalar_fn::fns::cast::CastReduce;

impl CastReduce for Constant {
    fn cast(array: ArrayView<'_, Constant>, dtype: &DType) -> VortexResult<Option<ArrayRef>> {
        match array.scalar().cast(dtype) {
            Ok(scalar) => Ok(Some(ConstantArray::new(scalar, array.len()).into_array())),
            Err(_e) => Ok(None),
        }
    }
}

#[cfg(test)]
mod tests {
    use rstest::rstest;

    use crate::IntoArray;
    use crate::arrays::ConstantArray;
    use crate::compute::conformance::cast::test_cast_conformance;
    use crate::scalar::Scalar;

    #[rstest]
    #[case(ConstantArray::new(Scalar::from(42u32), 5).into_array())]
    #[case(ConstantArray::new(Scalar::from(-100i32), 10).into_array())]
    #[case(ConstantArray::new(Scalar::from(3.5f32), 3).into_array())]
    #[case(ConstantArray::new(Scalar::from(true), 7).into_array())]
    #[case(ConstantArray::new(Scalar::null_native::<i32>(), 4).into_array())]
    #[case(ConstantArray::new(Scalar::from(255u8), 1).into_array())]
    fn test_cast_constant_conformance(#[case] array: crate::ArrayRef) {
        test_cast_conformance(&array);
    }
}