Enum DefinitionInterpretation

pub enum DefinitionInterpretation {
    AllValidItem,
    AllValidList,
    NullableItem,
    NullableList,
    EmptyableList,
    NullableAndEmptyableList,
}

This tells us how an array handles definition. Given a stack of these and a nested array and a set of definition levels we can calculate how we should interpret the definition levels.

For example, if the interpretation is [AllValidItem, NullableItem] then a 0 means “valid item” and a 1 means “null struct”. If the interpretation is [NullableItem, NullableItem] then a 0 means “valid item” and a 1 means “null item” and a 2 means “null struct”.

Lists are tricky because we might use up to two definition levels for a single layer of list nesting because we need one value to indicate “empty list” and another value to indicate “null list”.

Variants

AllValidItem

AllValidList

NullableItem

NullableList

EmptyableList

NullableAndEmptyableList

Implementations

impl DefinitionInterpretation

pub fn num_def_levels(&self) -> u16

How many definition levels do we need for this layer

pub fn is_all_valid(&self) -> bool

Does this layer have nulls?

pub fn is_list(&self) -> bool

Does this layer represent a list?

Trait Implementations

impl Clone for DefinitionInterpretation

fn clone(&self) -> DefinitionInterpretation

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DefinitionInterpretation

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

Formats the value using the given formatter.

impl PartialEq for DefinitionInterpretation

fn eq(&self, other: &DefinitionInterpretation) -> 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 Copy for DefinitionInterpretation

impl Eq for DefinitionInterpretation

impl StructuralPartialEq for DefinitionInterpretation