Struct Occurrence 

pub struct Occurrence {
    pub min: u32,
    pub max: Option<u32>,
}

Particle occurrence constraints

Fields

min: u32

Minimum occurrences

max: Option<u32>

Maximum occurrences (None = unbounded)

Implementations

impl Occurrence

pub const ONCE: Occurrence

Default occurrence (1..1)

pub const OPTIONAL: Occurrence

Optional occurrence (0..1)

pub const UNBOUNDED: Occurrence

Unbounded occurrence (0..unbounded)

pub const ONE_OR_MORE: Occurrence

Required with unbounded max (1..unbounded)

pub fn new(min: u32, max: Option<u32>) -> Self

Create a custom occurrence

pub fn is_optional(&self) -> bool

Check if this occurrence is optional

pub fn is_unbounded(&self) -> bool

Check if this occurrence is unbounded

pub fn allows_multiple(&self) -> bool

Check if this occurrence allows multiple

pub fn is_once(&self) -> bool

Check if this occurrence is exactly once

Trait Implementations

impl Clone for Occurrence

fn clone(&self) -> Occurrence

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Occurrence

impl Debug for Occurrence

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

Formats the value using the given formatter.

impl Default for Occurrence

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Occurrence

impl PartialEq for Occurrence

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