Systems

Struct Systems 

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pub struct Systems { /* private fields */ }
Expand description

Container for systems in a schedule.

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impl Systems

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pub fn len(&self) -> usize

Returns the number of systems in this container.

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pub fn is_empty(&self) -> bool

Returns true if this container is empty.

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pub fn get(&self, key: SystemKey) -> Option<&SystemWithAccess>

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

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pub fn get_mut(&mut self, key: SystemKey) -> Option<&mut SystemWithAccess>

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

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

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

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

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

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

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

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pub fn iter( &self, ) -> impl Iterator<Item = (SystemKey, &Box<dyn System<Out = (), In = ()>>, &[ConditionWithAccess])>

Returns an iterator over all systems and their conditions in this container.

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pub fn insert( &mut self, system: Box<dyn System<Out = (), In = ()>>, conditions: Vec<Box<dyn ReadOnlySystem<Out = bool, In = ()>>>, ) -> SystemKey

Inserts a new system into the container, along with its conditions, and queues it to be initialized later in Systems::initialize.

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

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pub fn is_initialized(&self) -> bool

Returns true if all systems in this container have been initialized.

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

Initializes all systems and their conditions that have not been initialized yet.

Trait Implementations§

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impl Default for Systems

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fn default() -> Systems

Returns the “default value” for a type. Read more
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impl Index<SystemKey> for Systems

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type Output = SystemWithAccess

The returned type after indexing.
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fn index(&self, key: SystemKey) -> &<Systems as Index<SystemKey>>::Output

Performs the indexing (container[index]) operation. Read more
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impl IndexMut<SystemKey> for Systems

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fn index_mut( &mut self, key: SystemKey, ) -> &mut <Systems as Index<SystemKey>>::Output

Performs the mutable indexing (container[index]) operation. Read more

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Return the T ShaderType for self. When used in AsBindGroup derives, it is safe to assume that all images in self exist.
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Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> FromWorld for T
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fn from_world(_world: &mut World) -> T

Creates Self using default().

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const WITNESS: W = W::MAKE

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Proof that Self is the same type as Self::Type, provides methods for casting between Self and Self::Type.
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type Type = T

The same type as Self, used to emulate type equality bounds (T == U) with associated type equality constraints (T: Identity<Type = U>).
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Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_result(self) -> Result<T, RunSystemError>

Converts this type into the system output type.
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