Instance Subscriptswift-composable-architecture 1.18.0ComposableArchitecture

subscript(case:)

Accesses the value associated with the given case for reading and writing.

subscript<Case>(case path: CaseKeyPath<State, Case>) -> Case? where State : CasePathable { get set }

Mangled symbol

s22ComposableArchitecture17PresentationStateV4caseqd__Sgs7KeyPathCy13CasePathsCore0H0VyxGAJyqd__GG_tcAH0H8PathableRzluip What are these?

FNV24 hash: 752OB

If you use the techniques of tree-based navigation (see Tree-based navigation), then you will have a single enum that determines the destinations your feature can navigate to, and you will hold onto that state using the Presents macro:

@ObservableState
struct State {
  @Presents var destination: Destination.State
}

The destination property has a projected value of PresentationState, which gives you a succinct syntax for modifying the data in a particular case of the Destination enum, like so:

state.$destination[case: \.detail]?.alert = AlertState {
  Text("Delete?")
}