Struct Empty

pub struct Empty {
    _private: (),
}

Row for the empty function.

Fields

_private: ()

Trait Implementations

impl Clone for Empty

fn clone(&self) -> Empty

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Empty

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

Formats the value using the given formatter.

impl PartialEq for Empty

fn eq(&self, other: &Empty) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Row for Empty

fn datum_at(&self, index: usize) -> DatumRef<'_>

Returns the DatumRef at the given index.

unsafe fn datum_at_unchecked(&self, _index: usize) -> DatumRef<'_>

Returns the DatumRef at the given index without bounds checking.

fn len(&self) -> usize

Returns the number of datum in the row.

fn iter(&self) -> impl ExactSizeIterator<Item = DatumRef<'_>>

Returns an iterator over the datums in the row, in DatumRef form.

fn is_empty(&self) -> bool

Returns true if the row contains no datum.

fn to_owned_row(&self) -> OwnedRow

Converts the row into an OwnedRow.

fn into_owned_row(self) -> OwnedRow

Consumes self and converts it into an OwnedRow.

fn value_serialize_into(&self, buf: impl BufMut)

Serializes the row with value encoding, into the given buf.

fn value_serialize(&self) -> Vec<u8>

Serializes the row with value encoding and returns the bytes.

fn value_serialize_bytes(&self) -> Bytes

Serializes the row with value encoding and returns the bytes.

fn value_estimate_size(&self) -> usize

fn memcmp_serialize_into(&self, serde: &OrderedRowSerde, buf: impl BufMut)

Serializes the row with memcomparable encoding, into the given buf. As each datum may have different order type, a serde should be provided.

fn memcmp_serialize(&self, serde: &OrderedRowSerde) -> Vec<u8>

Serializes the row with memcomparable encoding and return the bytes. As each datum may have different order type, a serde should be provided.

fn hash_datums_into<H: Hasher>(&self, state: &mut H)

Hash the datums of this row into the given hasher.

fn hash<H: BuildHasher>(&self, hash_builder: H) -> HashCode<H>

Returns the hash code of the row.

fn eq(this: &Self, other: impl Row) -> bool

Determines whether the datums of this row are equal to those of another.

impl Copy for Empty

impl Eq for Empty

impl StructuralPartialEq for Empty