ObservationStateRegistrar
Provides storage for tracking and access to data changes.
struct ObservationStateRegistrarProvides storage for tracking and access to data changes.
struct ObservationStateRegistrarimport ComposableArchitectureThe Composable Architecture (TCA, for short) is a library for building applications in a consistent and understandable way, with composition, testing, and ergonomics in mind. It can be used in SwiftUI, UIKit, and more, and on any Apple platform (iOS, macOS, tvOS, and watchOS).
struct ObservableStateIDA unique identifier for a observed value.
protocol CopyableA type whose values can be implicitly or explicitly copied.
protocol DecodableA type that can decode itself from an external representation.
protocol EncodableA type that can encode itself to an external representation.
protocol EquatableA type that can be compared for value equality.
protocol Escapableprotocol Hashable : EquatableA type that can be hashed into a Hasher to produce an integer hash value.
protocol Sendableinit() init(from decoder: any Decoder) throws var id: ObservableStateID { get }static func == (_: Self, _: Self) -> Bool mutating func _$willModify() func access<Subject, Member>(_ subject: Subject, keyPath: KeyPath<Subject, Member>) where Subject : Observable Registers access to a specific property for observation.
func access<Subject, Member>(_ subject: Subject, keyPath: KeyPath<Subject, Member>) where Subject : Perceptible func didModify<Subject, Member>(_ subject: Subject, keyPath: KeyPath<Subject, Member>, _ member: inout Member, _ oldValue: Member, _ isIdentityEqual: (Member, Member) -> Bool) where Subject : Observable A property observation called after setting the value of the subject.
func didModify<Subject, Member>(_ subject: Subject, keyPath: KeyPath<Subject, Member>, _ member: inout Member, _ oldValue: Member, _ isIdentityEqual: (Member, Member) -> Bool) where Subject : Perceptible func encode(to encoder: any Encoder) throws func hash(into hasher: inout Hasher) func mutate<Subject, Member, Value>(_ subject: Subject, keyPath: KeyPath<Subject, Member>, _ value: inout Value, _ newValue: Value, _ isIdentityEqual: (Value, Value) -> Bool) where Subject : Observable Mutates a value to a new value, and decided to notify observers based on the identity of the value.
func mutate<Subject, Member, Value>(_ subject: Subject, keyPath: KeyPath<Subject, Member>, _ value: inout Value, _ newValue: Value, _ isIdentityEqual: (Value, Value) -> Bool) where Subject : Perceptible func willModify<Subject, Member>(_ subject: Subject, keyPath: KeyPath<Subject, Member>, _ member: inout Member) -> Member where Subject : Observable, Member : ObservableState A property observation called before setting the value of the subject.
func willModify<Subject, Member>(_ subject: Subject, keyPath: KeyPath<Subject, Member>, _ member: inout Member) -> Member where Subject : Observable A no-op for non-observable values.
func willModify<Subject, Member>(_ subject: Subject, keyPath: KeyPath<Subject, Member>, _ member: inout Member) -> Member where Subject : Perceptible, Member : ObservableState func willModify<Subject, Member>(_ subject: Subject, keyPath: KeyPath<Subject, Member>, _ member: inout Member) -> Member where Subject : Perceptible static func != (lhs: Self, rhs: Self) -> Bool Returns a Boolean value indicating whether two values are not equal.