Add deprecations to APIs not needed in iOS 17+.

Sources/Perception/Macros.swift

@@ -9,18 +9,30 @@
 //
 //===----------------------------------------------------------------------===//
 
+@available(iOS, deprecated: 17, renamed: "Observable")
+@available(macOS, deprecated: 14, renamed: "Observable")
+@available(watchOS, deprecated: 10, renamed: "Observable")
+@available(tvOS, deprecated: 17, renamed: "Observable")
 @attached(
   member, names: named(_$id), named(_$perceptionRegistrar), named(access), named(withMutation))
 @attached(memberAttribute)
 @attached(extension, conformances: Perceptible, _Observable)
 public macro Perceptible() =
   #externalMacro(module: "PerceptionMacros", type: "PerceptibleMacro")
 
+@available(iOS, deprecated: 17, renamed: "ObservationTracked")
+@available(macOS, deprecated: 14, renamed: "ObservationTracked")
+@available(watchOS, deprecated: 10, renamed: "ObservationTracked")
+@available(tvOS, deprecated: 17, renamed: "ObservationTracked")
 @attached(accessor, names: named(init), named(get), named(set), named(_modify))
 @attached(peer, names: prefixed(_))
 public macro PerceptionTracked() =
   #externalMacro(module: "PerceptionMacros", type: "PerceptionTrackedMacro")
 
+@available(iOS, deprecated: 17, renamed: "ObservationIgnored")
+@available(macOS, deprecated: 14, renamed: "ObservationIgnored")
+@available(watchOS, deprecated: 10, renamed: "ObservationIgnored")
+@available(tvOS, deprecated: 17, renamed: "ObservationIgnored")
 @attached(accessor, names: named(willSet))
 public macro PerceptionIgnored() =
   #externalMacro(module: "PerceptionMacros", type: "PerceptionIgnoredMacro")

Sources/Perception/Perceptible.swift

@@ -16,4 +16,8 @@
 /// type doesn't add observation functionality to the type. Instead, always use
 /// the ``Perception/Perceptible()`` macro when adding observation
 /// support to a type.
+@available(iOS, deprecated: 17, renamed: "Observable")
+@available(macOS, deprecated: 14, renamed: "Observable")
+@available(watchOS, deprecated: 10, renamed: "Observable")
+@available(tvOS, deprecated: 17, renamed: "Observable")
 public protocol Perceptible {}

Sources/Perception/PerceptionChecking.swift

@@ -11,11 +11,30 @@ import Foundation
 /// This check only happens in `DEBUG` builds, and so does not affect App Store releases of your
 /// app. However, the checks can sometimes be costly and slow down your app in development. If
 /// you wish to fully disable the checks, you can set this boolean to `false.`
+@available(
+  iOS, deprecated: 17, message: "'isPerceptionCheckingEnabled' is no longer needed in iOS 17+"
+)
+@available(
+  macOS, deprecated: 14, message: "'isPerceptionCheckingEnabled' is no longer needed in macOS 14+"
+)
+@available(
+  watchOS, deprecated: 10,
+  message: "'isPerceptionCheckingEnabled' is no longer needed in watchOS 10+"
+)
+@available(
+  tvOS, deprecated: 17, message: "'isPerceptionCheckingEnabled' is no longer needed in tvOS 17+"
+)
 public var isPerceptionCheckingEnabled: Bool {
   get { perceptionChecking.isPerceptionCheckingEnabled }
   set { perceptionChecking.isPerceptionCheckingEnabled = newValue }
 }
 
+@available(iOS, deprecated: 17, message: "'_PerceptionLocals' is no longer needed in iOS 17+")
+@available(macOS, deprecated: 14, message: "'_PerceptionLocals' is no longer needed in macOS 14+")
+@available(
+  watchOS, deprecated: 10, message: "'_PerceptionLocals' is no longer needed in watchOS 10+"
+)
+@available(tvOS, deprecated: 17, message: "'_PerceptionLocals' is no longer needed in tvOS 17+")
 public enum _PerceptionLocals {
   @TaskLocal public static var isInPerceptionTracking = false
   @TaskLocal public static var skipPerceptionChecking = false

Sources/Perception/PerceptionRegistrar.swift

@@ -5,6 +5,10 @@ import IssueReporting
 ///
 /// You don't need to create an instance of `PerceptionRegistrar` when using
 /// the ``Perception/Perceptible()`` macro to indicate observability of a type.
+@available(iOS, deprecated: 17, message: "Use 'ObservationRegistrar' instead.")
+@available(macOS, deprecated: 14, message: "Use 'ObservationRegistrar' instead.")
+@available(watchOS, deprecated: 10, message: "Use 'ObservationRegistrar' instead.")
+@available(tvOS, deprecated: 17, message: "Use 'ObservationRegistrar' instead.")
 public struct PerceptionRegistrar: Sendable {
   private let _rawValue: AnySendable
   #if DEBUG

Sources/Perception/WithPerceptionTracking.swift

@@ -47,6 +47,18 @@
   /// To debug this, expand the warning in the Issue Navigator of Xcode (cmd+5), and click through
   /// the stack frames displayed to find the line in your view where you are accessing state without
   /// being inside ``WithPerceptionTracking``.
+  @available(
+    iOS, deprecated: 17, message: "'WithPerceptionTracking' is no longer needed in iOS 17+"
+  )
+  @available(
+    macOS, deprecated: 14, message: "'WithPerceptionTracking' is no longer needed in macOS 14+"
+  )
+  @available(
+    watchOS, deprecated: 10, message: "'WithPerceptionTracking' is no longer needed in watchOS 10+"
+  )
+  @available(
+    tvOS, deprecated: 17, message: "'WithPerceptionTracking' is no longer needed in tvOS 17+"
+  )
   public struct WithPerceptionTracking<Content> {
     @State var id = 0
     let content: () -> Content