Struct RelationEndpoint 

pub struct RelationEndpoint { /* private fields */ }

A relation endpoint label with optionality metadata.

Implementations

impl RelationEndpoint

pub fn new( label: impl AsRef<str>, required: bool, ) -> Result<RelationEndpoint, RelationError>

Creates a relation endpoint label.

Errors

Returns RelationError when the label is empty or contains control characters.

pub fn label(&self) -> &str

Returns the endpoint label.

pub const fn is_required(&self) -> bool

Returns whether this endpoint is required.

pub const fn is_optional(&self) -> bool

Returns whether this endpoint is optional.

Trait Implementations

impl Clone for RelationEndpoint

fn clone(&self) -> RelationEndpoint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RelationEndpoint

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

Formats the value using the given formatter.

impl Hash for RelationEndpoint

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 Ord for RelationEndpoint

fn cmp(&self, other: &RelationEndpoint) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for RelationEndpoint

fn eq(&self, other: &RelationEndpoint) -> 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 PartialOrd for RelationEndpoint

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

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl Eq for RelationEndpoint

impl StructuralPartialEq for RelationEndpoint