Struct ViewScope 

pub struct ViewScope<In, Out, V: View<Out>, PrevChain, InnerSteps> { /* private fields */ }

Builder for steps inside a .view::<V>() scope.

V is the view marker (implements View<Out>). Steps resolve against V::StaticViewType via IntoRefStep.

Implementations

impl<In, Out, V: View<Out>, PrevChain, InnerSteps> ViewScope<In, Out, V, PrevChain, InnerSteps>

pub fn tap<Params, S: IntoRefStep<V::StaticViewType, (), Params>>( self, f: S, registry: &Registry, ) -> ViewScope<In, Out, V, PrevChain, (InnerSteps, ViewTap<S::Step>)>

Observe the view. Side effects via Res/ResMut. Step signature: fn(Params..., &ViewType) -> ().

pub fn inspect<S: IntoRefStep<V::StaticViewType, (), ()>>( self, f: S, registry: &Registry, ) -> ViewScope<In, Out, V, PrevChain, (InnerSteps, ViewTap<S::Step>)>

Observe the view without side effects (no Params). Step signature: fn(&ViewType).

pub fn filter<Params, S: IntoRefStep<V::StaticViewType, bool, Params>>( self, f: S, registry: &Registry, ) -> ViewScope<In, Out, V, PrevChain, (InnerSteps, ViewGuard<S::Step>)>

Filter the event based on the view. Same as guard — returns bool to accept/reject. Step signature: fn(Params..., &ViewType) -> bool.

pub fn guard<Params, S: IntoRefStep<V::StaticViewType, bool, Params>>( self, f: S, registry: &Registry, ) -> ViewScope<In, Out, V, PrevChain, (InnerSteps, ViewGuard<S::Step>)>

Guard the event based on the view. Step signature: fn(Params..., &ViewType) -> bool.

impl<In, Out, V, PrevChain, InnerSteps> ViewScope<In, Out, V, PrevChain, InnerSteps>

where PrevChain: ChainCall<In, Out = Out>, V: View<Out>, InnerSteps: ViewSteps<V::StaticViewType>,

pub fn end_view( self, ) -> PipelineChain<In, Out, ViewNode<PrevChain, InnerSteps, V>>

Close the view scope. The event passes through unchanged.

pub fn end_view_guarded( self, ) -> PipelineChain<In, Option<Out>, ViewGuardedNode<PrevChain, InnerSteps, V>>

Close the view scope. If any guard rejected, returns None.

impl<In, Out, V, PrevChain, InnerSteps> ViewScope<In, Out, V, PrevChain, InnerSteps>

where PrevChain: ChainCall<In, Out = Out>, V: View<Out>, InnerSteps: ViewSteps<V::StaticViewType>, Out: 'static,

pub fn end_view_dag( self, ) -> DagChain<In, Out, ViewNode<PrevChain, InnerSteps, V>>

Close the view scope, returning a DagChain.

pub fn end_view_dag_guarded( self, ) -> DagChain<In, Option<Out>, ViewGuardedNode<PrevChain, InnerSteps, V>>

Close a guarded view scope, returning a DagChain.

pub fn end_view_arm(self) -> DagArm<In, Out, ViewNode<PrevChain, InnerSteps, V>>

Close the view scope, returning a DagArm.

pub fn end_view_arm_guarded( self, ) -> DagArm<In, Option<Out>, ViewGuardedNode<PrevChain, InnerSteps, V>>

Close a guarded view scope, returning a DagArm.