Struct QuerySpec 

pub struct QuerySpec { /* private fields */ }

Immutable description of which entities a query should visit and how to filter them.

Implementations

impl QuerySpec

pub fn new() -> Self

Empty spec that matches entities with no additional structural constraints.

pub fn with<T: 'static>(self) -> Self

Require a registered data component type.

pub fn with_id(self, id: ComponentId) -> Self

Require a registered data component by ComponentId.

pub fn without<T: 'static>(self) -> Self

Exclude entities that have the component type.

pub fn without_id(self, id: ComponentId) -> Self

Exclude entities that have the component id.

pub fn with_tag<T: 'static>(self) -> Self

Require a zero-sized tag marker type.

pub fn with_tag_id(self, id: ComponentId) -> Self

Require a registered tag marker by ComponentId.

pub fn without_tag<T: 'static>(self) -> Self

Exclude entities that carry the tag marker type.

pub fn without_tag_id(self, id: ComponentId) -> Self

Exclude entities that carry the tag marker id.

pub fn added<T: 'static>(self) -> Self

Require the component to be added inside the active change window.

pub fn added_id(self, id: ComponentId) -> Self

Require the component id to be added inside the active change window.

pub fn changed<T: 'static>(self) -> Self

Require the component to change inside the active change window.

pub fn changed_id(self, id: ComponentId) -> Self

Require the component id to change inside the active change window.

pub fn exact_ids(self, ids: Vec<EntityId>, policy: ExactIdPolicy) -> Self

Visit only the listed entity ids in caller order.

Trait Implementations

impl Clone for QuerySpec

fn clone(&self) -> QuerySpec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QuerySpec

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

Formats the value using the given formatter.

impl Default for QuerySpec

fn default() -> QuerySpec

Returns the “default value” for a type.