Enum ElementPosition 

pub enum ElementPosition<E> {
    Unassigned,
    Assigned {
        entity: E,
        index: usize,
    },
}

Position of an element within a list variable.

Variants

Unassigned

Element is not assigned to any list.

Assigned

Element is at the given index within the entity’s list.

Fields

entity: E

The entity that owns the list containing this element.

index: usize

The index of this element within the list.

Implementations

impl<E> ElementPosition<E>

pub fn is_unassigned(&self) -> bool

Returns true if the element is unassigned.

pub fn is_assigned(&self) -> bool

Returns true if the element is assigned.

pub fn index(&self) -> Option<usize>

Returns the index if assigned.

pub fn entity(&self) -> Option<&E>

Returns the entity if assigned.

Trait Implementations

impl<E: Clone> Clone for ElementPosition<E>

fn clone(&self) -> ElementPosition<E>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<E: Debug> Debug for ElementPosition<E>

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

Formats the value using the given formatter.

impl<E: PartialEq> PartialEq for ElementPosition<E>

fn eq(&self, other: &ElementPosition<E>) -> 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<E: Eq> Eq for ElementPosition<E>

impl<E> StructuralPartialEq for ElementPosition<E>