Enum Label 

#[repr(i32)]
pub enum Label {
    LABEL_OPTIONAL = 1,
    LABEL_REPEATED = 3,
    LABEL_REQUIRED = 2,
}

Variants

LABEL_OPTIONAL = 1

0 is reserved for errors

LABEL_REPEATED = 3

LABEL_REQUIRED = 2

The required label is only allowed in google.protobuf. In proto3 and Editions it’s explicitly prohibited. In Editions, the field_presence feature can be used to get this behavior.

Implementations

impl Label

pub const Optional: Label = Self::LABEL_OPTIONAL

Idiomatic alias for Self::LABEL_OPTIONAL; Debug prints the variant name.

pub const Repeated: Label = Self::LABEL_REPEATED

Idiomatic alias for Self::LABEL_REPEATED; Debug prints the variant name.

pub const Required: Label = Self::LABEL_REQUIRED

Idiomatic alias for Self::LABEL_REQUIRED; Debug prints the variant name.

Trait Implementations

impl Clone for Label

fn clone(&self) -> Label

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Label

impl Debug for Label

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

Formats the value using the given formatter.

impl Default for Label

fn default() -> Label

Returns the “default value” for a type.

impl Enumeration for Label

fn from_i32(value: i32) -> Option<Label>

Convert from an i32 wire value to the enum.

fn to_i32(&self) -> i32

Convert the enum to its i32 wire value.

fn proto_name(&self) -> &'static str

The name of this enum variant as it appears in the .proto file.

fn from_proto_name(name: &str) -> Option<Label>

Look up a variant by its protobuf name string.

fn values() -> &'static [Label]

All known variants of this enum, in proto declaration order.

impl Eq for Label

impl Hash for Label

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 PartialEq for Label

fn eq(&self, other: &Label) -> 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 StructuralPartialEq for Label