Struct arrow::ipc::gen::Schema::Feature

#[repr(transparent)]pub struct Feature(pub i64);

Represents Arrow Features that might not have full support within implementations. This is intended to be used in two scenarios:

1. A mechanism for readers of Arrow Streams and files to understand that the stream or file makes use of a feature that isn't supported or unknown to the implementation (and therefore can meet the Arrow forward compatibility guarantees).
2. A means of negotiating between a client and server what features a stream is allowed to use. The enums values here are intented to represent higher level features, additional details maybe negotiated with key-value pairs specific to the protocol.

Enums added to this list should be assigned power-of-two values to facilitate exchanging and comparing bitmaps for supported features.

Implementations

impl Feature

pub const UNUSED: Self

Needed to make flatbuffers happy.

pub const DICTIONARY_REPLACEMENT: Self

The stream makes use of multiple full dictionaries with the same ID and assumes clients implement dictionary replacement correctly.

pub const COMPRESSED_BODY: Self

The stream makes use of compressed bodies as described in Message.fbs.

pub const ENUM_MIN: i64

pub const ENUM_MAX: i64

pub const ENUM_VALUES: &'static [Self]

pub fn variant_name(self) -> Option<&'static str>

Returns the variant's name or "" if unknown.

Trait Implementations

impl Clone for Feature

fn clone(&self) -> Feature

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for Feature

impl Debug for Feature

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

Formats the value using the given formatter.

impl EndianScalar for Feature

fn to_little_endian(self) -> Self

fn from_little_endian(self) -> Self

impl Eq for Feature

impl<'a> Follow<'a> for Feature

type Inner = Self

fn follow(buf: &'a [u8], loc: usize) -> Self::Inner

impl Hash for Feature

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

Feeds this value into the given Hasher.

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

Feeds a slice of this type into the given Hasher.

impl Ord for Feature

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

This method returns an Ordering between self and other.

#[must_use]pub fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]pub fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]pub fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl PartialEq<Feature> for Feature

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl PartialOrd<Feature> for Feature

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

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

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl Push for Feature

type Output = Feature

fn push(&self, dst: &mut [u8], _rest: &[u8])

pub fn size() -> usize

pub fn alignment() -> PushAlignment

impl SimpleToVerifyInSlice for Feature

impl StructuralEq for Feature

impl StructuralPartialEq for Feature

impl<'a> Verifiable for Feature

fn run_verifier<'o, 'b>(
    v: &mut Verifier<'o, 'b>,
    pos: usize
) -> Result<(), InvalidFlatbuffer>

Runs the verifier for this type, assuming its at position pos in the verifier's buffer. Should not need to be called directly.