vortex_array::vtable

Trait OperationsVTable

Source 
pub trait OperationsVTable<V: VTable> {
    // Required methods
    fn slice(
        array: &V::Array,
        start: usize,
        stop: usize,
    ) -> VortexResult<ArrayRef>;
    fn scalar_at(array: &V::Array, index: usize) -> VortexResult<Scalar>;
}

Required Methods§

Source

fn slice(array: &V::Array, start: usize, stop: usize) -> VortexResult<ArrayRef>

Perform a constant-time slice of the array.

If an encoding cannot perform this slice in constant time, it should internally store an offset and length in order to defer slicing until the array is accessed.

This function returns ArrayRef since some encodings can return a simpler array for some slices, for example a crate::arrays::ChunkedArray may slice into a single chunk.

§Preconditions

Bounds-checking has already been performed by the time this function is called.

Source

fn scalar_at(array: &V::Array, index: usize) -> VortexResult<Scalar>

Fetch the scalar at the given index.

§Preconditions

Bounds-checking has already been performed by the time this function is called, and the index is guaranteed to be non-null.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§