Enum Arity 

pub enum Arity {
    Zero,
    Exact(usize),
    Any,
}

Arity is a way to describe how many inputs an operation expects. It can be zero, a specific number, or any number.

Variants

Zero

Exact(usize)

Any

Methods from Deref<Target = usize>

pub const MIN: usize = 0

pub const MAX: usize

pub const BITS: u32

Trait Implementations

impl Clone for Arity

fn clone(&self) -> Arity

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Arity

impl Debug for Arity

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

Formats the value using the given formatter.

impl Default for Arity

fn default() -> Arity

Returns the “default value” for a type.

impl Deref for Arity

type Target = usize

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Display for Arity

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

Formats the value using the given formatter.

impl Eq for Arity

impl From<usize> for Arity

fn from(value: usize) -> Self

Converts to this type from the input type.

impl Hash for Arity

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 Arity

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Arity