Enum SystemHandleTemplate 

pub enum SystemHandleTemplate<I: SystemInput + 'static = (), O: 'static = ()> {
    Handle(SystemHandle<I, O>),
    Value(SystemHandleValue<I, O>),
}

A Template that produces a SystemHandle.

Variants

Handle(SystemHandle<I, O>)

Creates a SystemHandle by cloning the given SystemHandle value.

Value(SystemHandleValue<I, O>)

Creates a SystemHandle by registering the given system value using World::register_tracked_boxed_system. This will cache the resulting SystemHandle on the template and reuse it for future template builds.

This should generally be constructed using SystemHandleTemplate::value or system_value.

Implementations

impl<I: SystemInput + 'static, O: 'static> SystemHandleTemplate<I, O>

pub fn value<M>(system: impl IntoSystem<I, O, M>) -> Self

This will create a new SystemHandleTemplate for the given system value. This makes it possible to define systems “inline” in templates / scenes that produce a SystemId.

Trait Implementations

impl<I: SystemInput + 'static, O: 'static> Default for SystemHandleTemplate<I, O>

fn default() -> Self

Returns the “default value” for a type.

impl<I: SystemInput + 'static, O: 'static> From<Box<dyn System<In = I, Out = O>>> for SystemHandleTemplate<I, O>

fn from(system: BoxedSystem<I, O>) -> Self

Converts to this type from the input type.

impl<I: SystemInput + 'static, O: 'static> From<SystemHandle<I, O>> for SystemHandleTemplate<I, O>

fn from(handle: SystemHandle<I, O>) -> Self

Converts to this type from the input type.

impl<I: SystemInput + 'static, O: 'static> From<SystemId<I, O>> for SystemHandleTemplate<I, O>

fn from(id: SystemId<I, O>) -> Self

Converts to this type from the input type.

impl<I: SystemInput + 'static, O: 'static> Template for SystemHandleTemplate<I, O>

type Output = SystemHandle<I, O>

The type of value produced by this Template.

fn build_template( &self, context: &mut TemplateContext<'_, '_>, ) -> Result<Self::Output>

Uses this template and the given entity context to produce a Template::Output.

fn clone_template(&self) -> Self

Clones this template. See Clone.