## Coverage Report

#### Created: 2025-11-17 14:14

next uncovered line (L), next uncovered region (R), next uncovered branch (B)

    /Users/andrewlamb/Software/arrow-rs/arrow-data/src/transform/list_view.rs

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    // Licensed to the Apache Software Foundation (ASF) under one
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    // or more contributor license agreements.  See the NOTICE file
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    // distributed with this work for additional information
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    // regarding copyright ownership.  The ASF licenses this file
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    // to you under the Apache License, Version 2.0 (the
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    // "License"); you may not use this file except in compliance
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    // with the License.  You may obtain a copy of the License at
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    //
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    //   http://www.apache.org/licenses/LICENSE-2.0
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    //
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    // Unless required by applicable law or agreed to in writing,
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    // software distributed under the License is distributed on an
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    // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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    // KIND, either express or implied.  See the License for the
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    // specific language governing permissions and limitations
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    // under the License.
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    use crate::ArrayData;
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    use crate::transform::_MutableArrayData;
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    use arrow_buffer::ArrowNativeType;
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    use num_integer::Integer;
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    use num_traits::CheckedAdd;
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    0
    pub(super) fn build_extend<T: ArrowNativeType + Integer + CheckedAdd>(
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        array: &ArrayData,
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    ) -> crate::transform::Extend<'_> {
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        let offsets = array.buffer::<T>(0);
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        let sizes = array.buffer::<T>(1);
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        Box::new(
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            move |mutable: &mut _MutableArrayData, _index: usize, start: usize, len: usize| {
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                let offset_buffer = &mut mutable.buffer1;
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                let sizes_buffer = &mut mutable.buffer2;
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                for &offset in &offsets[start..start + len] {
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                    offset_buffer.push(offset);
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                }
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                // sizes
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                for &size in &sizes[start..start + len] {
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                    sizes_buffer.push(size);
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                }
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                // the beauty of views is that we don't need to copy child_data, we just splat
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                // the offsets and sizes.
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            },
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        )
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    }
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    pub(super) fn extend_nulls<T: ArrowNativeType>(mutable: &mut _MutableArrayData, len: usize) {
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        let offset_buffer = &mut mutable.buffer1;
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        let sizes_buffer = &mut mutable.buffer2;
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        // We push 0 as a placeholder for NULL values in both the offsets and sizes
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        (0..len).for_each(|_| offset_buffer.push(T::default()));
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        (0..len).for_each(|_| sizes_buffer.push(T::default()));
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    0
    }