Struct datafusion::common::arrow::ipc::MetadataVersion

#[repr(transparent)]
pub struct MetadataVersion(pub i16);

Tuple Fields

0: i16

Implementations

impl MetadataVersion

pub const V1: MetadataVersion = _

0.1.0 (October 2016).

pub const V2: MetadataVersion = _

0.2.0 (February 2017). Non-backwards compatible with V1.

pub const V3: MetadataVersion = _

0.3.0 -> 0.7.1 (May - December 2017). Non-backwards compatible with V2.

pub const V4: MetadataVersion = _

= 0.8.0 (December 2017). Non-backwards compatible with V3.

pub const V5: MetadataVersion = _

= 1.0.0 (July 2020). Backwards compatible with V4 (V5 readers can read V4 metadata and IPC messages). Implementations are recommended to provide a V4 compatibility mode with V5 format changes disabled.

Incompatible changes between V4 and V5:

• Union buffer layout has changed. In V5, Unions don’t have a validity bitmap buffer.

pub const ENUM_MIN: i16 = 0i16

pub const ENUM_MAX: i16 = 4i16

pub const ENUM_VALUES: &'static [MetadataVersion] = _

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

Returns the variant’s name or “” if unknown.

Trait Implementations

impl Clone for MetadataVersion

fn clone(&self) -> MetadataVersion

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MetadataVersion

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

Formats the value using the given formatter.

impl Default for MetadataVersion

fn default() -> MetadataVersion

Returns the “default value” for a type.

impl EndianScalar for MetadataVersion

type Scalar = i16

fn to_little_endian(self) -> i16

fn from_little_endian(v: i16) -> MetadataVersion

impl<'a> Follow<'a> for MetadataVersion

type Inner = MetadataVersion

unsafe fn follow( buf: &'a [u8], loc: usize, ) -> <MetadataVersion as Follow<'a>>::Inner

Safety

impl Hash for MetadataVersion

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

where __H: Hasher,

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 MetadataVersion

fn cmp(&self, other: &MetadataVersion) -> 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 + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for MetadataVersion

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

fn partial_cmp(&self, other: &MetadataVersion) -> 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 Push for MetadataVersion

type Output = MetadataVersion

unsafe fn push(&self, dst: &mut [u8], _written_len: usize)

Safety

fn size() -> usize

fn alignment() -> PushAlignment

impl<'a> Verifiable for MetadataVersion

fn run_verifier( v: &mut Verifier<'_, '_>, 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.

impl Copy for MetadataVersion

impl Eq for MetadataVersion

impl SimpleToVerifyInSlice for MetadataVersion

impl StructuralPartialEq for MetadataVersion