Enum Rule

pub enum Rule {
    Optional,
    Repeated,
    Required,
}

A field rule

Variants

Optional

A well-formed message can have zero or one of this field (but not more than one).

Repeated

This field can be repeated any number of times (including zero) in a well-formed message. The order of the repeated values will be preserved.

Required

A well-formed message must have exactly one of this field.

Trait Implementations

impl Clone for Rule

fn clone(&self) -> Rule

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Rule

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

Formats the value using the given formatter.

impl Hash for Rule

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 PartialEq for Rule

fn eq(&self, other: &Rule) -> 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 Copy for Rule

impl Eq for Rule

impl StructuralPartialEq for Rule