Trait LayoutChildren 

pub trait LayoutChildren:
    'static
    + Send
    + Sync {
    // Required methods
    fn to_arc(&self) -> Arc<dyn LayoutChildren> ;
    fn child(&self, idx: usize, dtype: &DType) -> VortexResult<LayoutRef>;
    fn child_row_count(&self, idx: usize) -> u64;
    fn nchildren(&self) -> usize;

    // Provided method
    fn child_is_indivisible(&self, _idx: usize) -> bool { ... }
}

Abstract way of accessing the children of a layout.

This allows us to abstract over the lazy flatbuffer-based layouts, as well as the in-memory layout trees.

Required Methods

fn to_arc(&self) -> Arc<dyn LayoutChildren>

fn child(&self, idx: usize, dtype: &DType) -> VortexResult<LayoutRef>

fn child_row_count(&self, idx: usize) -> u64

fn nchildren(&self) -> usize

Provided Methods

fn child_is_indivisible(&self, _idx: usize) -> bool

Returns true if the child at idx is known — without materializing it — to be indivisible: it registers no split boundaries strictly inside its row range (see VTable::is_indivisible).

Implementations must conservatively return false when answering would require materializing the child.

Trait Implementations

impl Debug for dyn LayoutChildren

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl LayoutChildren for Arc<dyn LayoutChildren>

fn to_arc(&self) -> Arc<dyn LayoutChildren>

fn child(&self, idx: usize, dtype: &DType) -> VortexResult<LayoutRef>

fn child_row_count(&self, idx: usize) -> u64

fn nchildren(&self) -> usize

fn child_is_indivisible(&self, idx: usize) -> bool

Implementors