[stdlib] dependsOn → @Lifetime

Author: lorentey

stdlib/public/core/CompilerProtocols.swift

@@ -268,7 +268,8 @@ public protocol CaseIterable {
 /// purposes is discouraged.
 public protocol ExpressibleByNilLiteral: ~Copyable, ~Escapable {
   /// Creates an instance initialized with `nil`.
-  init(nilLiteral: ()) -> dependsOn(immortal) Self
+  @lifetime(immortal)
+  init(nilLiteral: ())
 }
 
 public protocol _ExpressibleByBuiltinIntegerLiteral {

stdlib/public/core/Optional.swift

@@ -155,7 +155,8 @@ extension Optional: ExpressibleByNilLiteral where Wrapped: ~Copyable & ~Escapabl
   /// initializer behind the scenes.
   @_transparent
   @_preInverseGenerics
-  public init(nilLiteral: ()) -> dependsOn(immortal) Self {
+  @lifetime(immortal)
+  public init(nilLiteral: ()) {
     self = .none
   }
 }