A no-op for non-observable values.
func willModify<Subject, Member>(_ subject: Subject, keyPath: KeyPath<Subject, Member>, _ member: inout Member) -> Member where Subject : Observable s22ComposableArchitecture25ObservationStateRegistrarV10willModify_7keyPath_q_x_s03KeyI0Cyxq_Gq_zt0C010ObservableRzr0_lF What are these?1B9AVSee willModify(_:keyPath:_:) info on what this method does when used with observable values.
import 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 ObservationStateRegistrarProvides storage for tracking and access to data changes.
class KeyPath<Root, Value>A key path from a specific root type to a specific resulting value type.
protocol Observablefunc 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.
init() 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 : Perceptible, Member : ObservableState func willModify<Subject, Member>(_ subject: Subject, keyPath: KeyPath<Subject, Member>, _ member: inout Member) -> Member where Subject : Perceptible