Struct MapType

pub struct MapType(Box<(DataType, DataType)>);

Refer to super::super::array::MapArray for the invariants of a map value.

Tuple Fields

0: Box<(DataType, DataType)>

Implementations

impl MapType

pub fn from_kv(key: DataType, value: DataType) -> Self

Panics

Panics if the key type is not valid for a map.

pub fn try_from_kv(key: DataType, value: DataType) -> Result<Self, String>

pub fn try_from_entries(list_entries_type: DataType) -> Result<Self, String>

pub fn from_entries(list_entries_type: DataType) -> Self

Panics

Panics if the key type is not valid for a map, or the entries type is not a valid struct type.

pub fn struct_type_for_map( key_type: DataType, value_type: DataType, ) -> StructType

Panics

Panics if the key type is not valid for a map.

pub fn key(&self) -> &DataType

pub fn value(&self) -> &DataType

pub fn into_struct(self) -> DataType

pub fn into_list(self) -> DataType

pub fn check_key_type_valid(data_type: &DataType) -> Result<(), String>

String and integral types are allowed.

This is similar to Protobuf’s decision.

Note that this isn’t definitive. Just be conservative at the beginning, but not too restrictive (like only allowing strings).

Trait Implementations

impl Clone for MapType

fn clone(&self) -> MapType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MapType

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

Formats the value using the given formatter.

impl Display for MapType

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

Formats the value using the given formatter.

impl From<MapType> for DataType

fn from(value: MapType) -> Self

Converts to this type from the input type.

impl FromStr for MapType

type Err = Error

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for MapType

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 MapType

fn cmp(&self, other: &MapType) -> 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 MapType

fn eq(&self, other: &MapType) -> 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 MapType

fn partial_cmp(&self, other: &MapType) -> 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 Eq for MapType

impl StructuralPartialEq for MapType