Struct EntitySet 

pub struct EntitySet<'a, E: Entity>(/* private fields */);

Opaque public wrapper around the internal set-expression tree.

Implementations

impl<'a, E: Entity> EntitySet<'a, E>

pub fn empty() -> Self

Create an empty entity set.

pub fn union(self, other: Self) -> Self

pub fn intersection(self, other: Self) -> Self

pub fn difference(self, other: Self) -> Self

pub fn contains(&self, entity_id: EntityId<E>) -> bool

Test whether entity_id is a member of this set.

pub fn to_owned_vec(self) -> Vec<EntityId<E>>

Collect this set’s contents into an owned vector of EntityId<E>.

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

Returns Some(length) only when the set length is trivially known.

This is true only for direct SourceSet leaves except PropertySet. Composite expressions return None.

Trait Implementations

impl<'a, E: Entity> Default for EntitySet<'a, E>

fn default() -> Self

Returns the “default value” for a type.

impl<'a, E: Entity> IntoIterator for EntitySet<'a, E>

type Item = EntityId<E>

The type of the elements being iterated over.

type IntoIter = EntitySetIterator<'a, E>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.