Struct Map

pub struct Map {
    pub keys_sorted: bool,
}

A Map is a logical nested type that is represented as

List<entries: Struct<key: K, value: V>>

In this layout, the keys and values are each respectively contiguous. We do not constrain the key and value types, so the application is responsible for ensuring that the keys are hashable and unique. Whether the keys are sorted may be set in the metadata for this field.

In a field with Map type, the field has a child Struct field, which then has two children: key type and the second the value type. The names of the child fields may be respectively “entries”, “key”, and “value”, but this is not enforced.

Map

  - child[0] entries: Struct
    - child[0] key: K
    - child[1] value: V

Neither the “entries” field nor the “key” field may be nullable.

The metadata is structured so that Arrow systems without special handling for Map can make Map an alias for List. The “layout” attribute for the Map field must have the same contents as a List.

Generated from these locations:

• Table Map in the file Schema.fbs:143

Fields

keys_sorted: bool

Set to true if the keys within each value are sorted

Implementations

impl Map

pub fn builder() -> MapBuilder<()>

Creates a MapBuilder for serializing an instance of this table.

pub fn create( builder: &mut Builder, field_keys_sorted: impl WriteAsDefault<bool, bool>, ) -> Offset<Self>

Trait Implementations

impl Clone for Map

fn clone(&self) -> Map

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Map

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

Formats the value using the given formatter.

impl Default for Map

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Map

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for Map

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Map

fn cmp(&self, other: &Map) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Map

fn eq(&self, other: &Map) -> 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 PartialOrd for Map

fn partial_cmp(&self, other: &Map) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for Map

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<'a> TryFrom<MapRef<'a>> for Map

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: MapRef<'a>) -> Result<Self>

Performs the conversion.

impl Eq for Map

impl StructuralPartialEq for Map

impl VectorWrite<Offset<Map>> for Map

Safety

The planus compiler generates implementations that initialize the bytes in write_values.

impl WriteAs<Offset<Map>> for Map

impl WriteAsOffset<Map> for Map

impl<T0: WriteAsDefault<bool, bool>> WriteAsOffset<Map> for MapBuilder<(T0,)>

impl WriteAsOptional<Offset<Map>> for Map