Struct SystemSets 

pub struct SystemSets { /* private fields */ }

Container for system sets in a schedule.

Implementations

impl SystemSets

pub fn len(&self) -> usize

Returns the number of system sets in this container.

pub fn is_empty(&self) -> bool

Returns true if this container is empty.

pub fn contains(&self, set: impl SystemSet) -> bool

Returns true if the given set is present in this container.

pub fn get(&self, key: SystemSetKey) -> Option<&(dyn SystemSet + 'static)>

Returns a reference to the system set with the given key, if it exists.

pub fn get_key_or_insert( &mut self, set: Interned<dyn SystemSet>, ) -> SystemSetKey

Returns the key for the given system set, inserting it into this container if it does not already exist.

pub fn has_conditions(&self, key: SystemSetKey) -> bool

Returns true if the system set with the given key has conditions.

pub fn get_conditions( &self, key: SystemSetKey, ) -> Option<&[ConditionWithAccess]>

Returns a reference to the conditions for the system set with the given key, if it exists.

pub fn get_conditions_mut( &mut self, key: SystemSetKey, ) -> Option<&mut Vec<ConditionWithAccess>>

Returns a mutable reference to the conditions for the system set with the given key, if it exists.

pub fn iter( &self, ) -> impl Iterator<Item = (SystemSetKey, &(dyn SystemSet + 'static), &[ConditionWithAccess])>

Returns an iterator over all system sets in this container, along with their conditions.

pub fn insert( &mut self, set: Interned<dyn SystemSet>, new_conditions: Vec<Box<dyn ReadOnlySystem<Out = bool, In = ()>>>, ) -> SystemSetKey

Inserts conditions for a system set into the container, and queues the newly added conditions to be initialized later in SystemSets::initialize.

If the set was not already present in the container, it is added automatically.

We have to defer initialization of system set conditions in the container until we have &mut World access, so we store these in a list until SystemSets::initialize is called. This is usually done upon the first run of the schedule.

pub fn is_initialized(&self) -> bool

Returns true if all system sets’ conditions in this container have been initialized.

pub fn initialize(&mut self, world: &mut World)

Initializes all system sets’ conditions that have not been initialized yet. Because a system set’s conditions may be appended to multiple times, we track which conditions were added since the last initialization and only initialize those.

Trait Implementations

impl Default for SystemSets

fn default() -> SystemSets

Returns the “default value” for a type.

impl Index<SystemSetKey> for SystemSets

type Output = dyn SystemSet

The returned type after indexing.

fn index( &self, key: SystemSetKey, ) -> &<SystemSets as Index<SystemSetKey>>::Output

Performs the indexing (container[index]) operation.