Enum prost_types::field::Cardinality

#[repr(i32)]pub enum Cardinality {
    Unknown,
    Optional,
    Required,
    Repeated,
}

Whether a field is optional, required, or repeated.

Variants

Unknown

For fields with unknown cardinality.

Optional

For optional fields.

Required

For required fields. Proto2 syntax only.

Repeated

For repeated fields.

Implementations

impl Cardinality

pub fn is_valid(value: i32) -> bool

Returns true if value is a variant of Cardinality.

pub fn from_i32(value: i32) -> Option<Cardinality>

Converts an i32 to a Cardinality, or None if value is not a valid variant.

Trait Implementations

impl Clone for Cardinality

pub fn clone(&self) -> Cardinality

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for Cardinality

impl Debug for Cardinality

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

Formats the value using the given formatter.

impl Default for Cardinality

pub fn default() -> Cardinality

Returns the "default value" for a type.

impl Eq for Cardinality

impl From<Cardinality> for i32

pub fn from(value: Cardinality) -> i32

Performs the conversion.

impl Hash for Cardinality

pub 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 Cardinality

pub fn cmp(&self, other: &Cardinality) -> 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<Cardinality> for Cardinality

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

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

#[must_use]pub fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl PartialOrd<Cardinality> for Cardinality

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

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

#[must_use]pub fn lt(&self, other: &Rhs) -> bool

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

#[must_use]pub fn le(&self, other: &Rhs) -> bool

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

#[must_use]pub fn gt(&self, other: &Rhs) -> bool

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

#[must_use]pub fn ge(&self, other: &Rhs) -> bool

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

impl StructuralEq for Cardinality

impl StructuralPartialEq for Cardinality