Remove unused Shift instance

Dsl/src/main/scala/com/thoughtworks/dsl/Dsl.scala

@@ -123,80 +123,7 @@ object Dsl extends LowPriorityDsl0 {
     )
   }
 
-  type Continuation[R, +A] = (A => R) => R
-
-  // TODO: Move to a separate library ( domains-continuation? )
-  object Continuation {
-    @inline
-    def now[R, A](a: A): R !! A = _(a)
-
-    @inline
-    def empty[R, A](r: R): R !! A = Function.const(r)
-
-    @inline
-    def delay[R, A](a: () => A): R !! A = _(a())
-
-    // TODO: turn it into an inline def
-    // TODO: Think about package object in Scala 3
-    @inline
-    def apply[R, A](a: => A): (R !! A) = delay(() => a)
-
-    def toTryContinuation[LeftDomain, Value](
-        task: LeftDomain !! Throwable !! Value
-    )(handler: Try[Value] => LeftDomain): LeftDomain = {
-      task { a => failureHandler =>
-        handler(Success(a))
-      } { e =>
-        handler(Failure(e))
-      }
-    }
-
-    def fromTryContinuation[LeftDomain, Value](
-        continuation: LeftDomain !! Try[Value]
-    )(successHandler: Value => LeftDomain !! Throwable)(failureHandler: Throwable => LeftDomain): LeftDomain = {
-      continuation(
-        new (Try[Value] => LeftDomain) {
-          def apply(result: Try[Value]): LeftDomain = {
-            result match {
-              case Success(a) =>
-                val protectedContinuation =
-                  try {
-                    successHandler(a)
-                  } catch {
-                    case NonFatal(e) =>
-                      return failureHandler(e)
-                  }
-                protectedContinuation(failureHandler)
-              case Failure(e) =>
-                failureHandler(e)
-            }
-          }
-        }
-      )
-    }
-
-  }
-
-  type !![R, +A] = Continuation[R, A]
-  val !! = Continuation
-
-  @deprecated("Use bangnotation.reset instead", "Dsl.scala 2.0.0")
-  private[dsl] /* sealed */ trait ResetAnnotation extends Annotation with StaticAnnotation
-  @deprecated("Use bangnotation.reset instead", "Dsl.scala 2.0.0")
-  private[dsl] final class nonTypeConstraintReset extends ResetAnnotation with StaticAnnotation
-
-  /** An annotation to explicitly perform reset control operator on a code block.
-    *
-    * @note
-    *   This annotation can be automatically added if [[compilerplugins.ResetEverywhere ResetEverywhere]] compiler
-    *   plug-in is enabled.
-    */
-  @deprecated("Use bangnotation.reset instead", "Dsl.scala 2.0.0")
-  final class reset extends ResetAnnotation with StaticAnnotation with TypeConstraint
-
-  /** An annotation to mark a method is a shift control operator. */
-  @deprecated("Use bangnotation.reset instead", "Dsl.scala 2.0.0")
-  final class shift extends StaticAnnotation
+  private[dsl] type !![R, +A] = (A => R) => R
 
   def apply[Keyword, Domain, Value](implicit typeClass: Dsl[Keyword, Domain, Value]): Dsl[Keyword, Domain, Value] =
     typeClass

build.sbt

@@ -21,12 +21,18 @@ lazy val bangnotation =
       `keywords-While`
     )
 
+lazy val `domains-Continuation` =
+  crossProject(JSPlatform, JVMPlatform)
+    .crossType(CrossType.Pure)
+    .dependsOn(bangnotation)
+
 lazy val `domains-Task` =
   crossProject(JSPlatform, JVMPlatform)
     .crossType(CrossType.Pure)
     .dependsOn(
       `keywords-Shift`,
       bangnotation,
+      `domains-Continuation`,
       `keywords-In` % Test,
       `keywords-Fork` % Test,
       `keywords-Each` % Test,
@@ -170,6 +176,7 @@ lazy val `keywords-Await` =
     .crossType(CrossType.Pure)
     .dependsOn(
       Dsl,
+      `domains-Continuation`,
       comprehension % Test,
       bangnotation % Test,
       `domains-Task` % Test,

domains-Continuation/src/main/scala/com/thoughtworks/dsl/domains/Continuation.scala

@@ -0,0 +1,62 @@
+package com.thoughtworks.dsl
+package domains
+
+import bangnotation._
+import scala.util._
+import scala.util.control.NonFatal
+
+type Continuation[R, +A] = (A => R) => R
+
+object Continuation {
+  val !! = this
+  type !![R, +A] = Continuation[R, A]
+
+
+  @inline
+  def now[R, A](a: A): R !! A = _(a)
+
+  @inline
+  def empty[R, A](r: R): R !! A = Function.const(r)
+
+  @inline
+  def delay[R, A](a: () => A): R !! A = _(a())
+
+  inline def apply[R, A](inline a: A): R !! A = { handler =>
+    reset(handler(a))
+  }
+
+  def toTryContinuation[LeftDomain, Value](
+      task: LeftDomain !! Throwable !! Value
+  )(handler: Try[Value] => LeftDomain): LeftDomain = {
+    task { a => failureHandler =>
+      handler(Success(a))
+    } { e =>
+      handler(Failure(e))
+    }
+  }
+
+  def fromTryContinuation[LeftDomain, Value](
+      continuation: LeftDomain !! Try[Value]
+  )(successHandler: Value => LeftDomain !! Throwable)(failureHandler: Throwable => LeftDomain): LeftDomain = {
+    continuation(
+      new (Try[Value] => LeftDomain) {
+        def apply(result: Try[Value]): LeftDomain = {
+          result match {
+            case Success(a) =>
+              val protectedContinuation =
+                try {
+                  successHandler(a)
+                } catch {
+                  case NonFatal(e) =>
+                    return failureHandler(e)
+                }
+              protectedContinuation(failureHandler)
+            case Failure(e) =>
+              failureHandler(e)
+          }
+        }
+      }
+    )
+  }
+
+}

domains-Task/.jvm/src/main/scala/com/thoughtworks/dsl/domains/TaskPlatformSpecificFunctions.scala

@@ -4,7 +4,7 @@ import scala.concurrent.SyncVar
 import scala.util.Try
 import scala.util.control.TailCalls
 import scala.concurrent.duration.Duration
-import com.thoughtworks.dsl.Dsl.Continuation
+import com.thoughtworks.dsl.domains.Continuation
 private[domains] trait TaskPlatformSpecificFunctions { this: Task.type =>
 
   def blockingAwait[A](task: Task[A], timeout: Duration = Duration.Inf): A = {

domains-Task/.jvm/src/test/scala/com/thoughtworks/dsl/domains/RaiiSpec.scala

@@ -1,9 +1,8 @@
 package com.thoughtworks.dsl
 package domains
 
-import com.thoughtworks.dsl.Dsl.{!!, Continuation}
 import com.thoughtworks.dsl.keywords.{Shift, Yield}
-import com.thoughtworks.dsl.domains._
+import com.thoughtworks.dsl.domains._, Continuation.!!
 import com.thoughtworks.dsl.bangnotation._
 
 import scala.util.control.NonFatal

domains-Task/.jvm/src/test/scala/com/thoughtworks/dsl/domains/UsingSpec.scala

@@ -1,7 +1,7 @@
 package com.thoughtworks.dsl
 package domains
 
-import com.thoughtworks.dsl.Dsl.{!!, Continuation}
+import Continuation.!!
 import com.thoughtworks.dsl.bangnotation._
 import com.thoughtworks.dsl.keywords.{Using, Yield}
 import org.scalatest.Assertion

domains-Task/src/main/scala/com/thoughtworks/dsl/domains/Task.scala

@@ -1,7 +1,7 @@
 package com.thoughtworks.dsl
 package domains
 
-import com.thoughtworks.dsl.Dsl.{!!, Continuation}
+import com.thoughtworks.dsl.domains.Continuation, Continuation.!!
 import com.thoughtworks.dsl.keywords.Shift
 import com.thoughtworks.dsl.bangnotation._
 

keywords-Await/src/main/scala/com/thoughtworks/dsl/keywords/Await.scala

@@ -3,7 +3,7 @@ package keywords
 import Dsl.IsKeyword
 import Dsl.Typed
 import com.thoughtworks.dsl.Dsl
-import com.thoughtworks.dsl.Dsl.!!
+import com.thoughtworks.dsl.domains.Continuation.!!
 import scala.concurrent.Await.result
 import scala.concurrent.duration.Duration
 import scala.concurrent.{ExecutionContext, Future}

keywords-Shift/src/main/scala/com/thoughtworks/dsl/keywords/Shift.scala

@@ -4,7 +4,6 @@ import Dsl.IsKeyword
 import Dsl.Typed
 
 import com.thoughtworks.dsl.Dsl
-import com.thoughtworks.dsl.Dsl.{!!, Continuation}
 import com.thoughtworks.dsl.keywords.Shift.{SameDomainStackSafeShiftDsl, StackSafeShiftDsl}
 
 import scala.annotation.tailrec
@@ -15,7 +14,7 @@ import scala.util.control.TailCalls.TailRec
 /** @author
   *   杨博 (Yang Bo)
   */
-opaque type Shift[R, A] = Dsl.Continuation[R, A]
+opaque type Shift[R, A] = (A => R) => R
 
 private[keywords] trait LowPriorityShift1 {
 
@@ -30,13 +29,6 @@ private[keywords] trait LowPriorityShift1 {
 
 private[keywords] trait LowPriorityShift0 extends LowPriorityShift1 { this: Shift.type =>
 
-  @inline
-  implicit def stackSafeShiftDsl[Domain, NewDomain, Value](implicit
-      stackSafeShiftDsl: StackSafeShiftDsl[Domain, NewDomain, Value]
-  ): Dsl[Shift[Domain, Value], NewDomain, Value] = {
-    stackSafeShiftDsl
-  }
-
   given [LeftDomain, RightDomain, Value](using
       restDsl: SameDomainStackSafeShiftDsl[LeftDomain, RightDomain]
   ): SameDomainStackSafeShiftDsl[LeftDomain !! RightDomain, Value] = { (keyword, handler) =>
@@ -151,8 +143,10 @@ object Shift extends LowPriorityShift0 {
         taskFlatMap(keyword.continuation, handler)
     }
 
-  def apply[R, A](continuation: Continuation[R, A]): Shift[R, A] = continuation
+  private[keywords] type !![R, +A] = (A => R) => R
+
+  def apply[R, A](continuation: R !! A): Shift[R, A] = continuation
 
-  extension [R, A](shift: Shift[R, A]) def continuation: Continuation[R, A] = shift
+  extension [R, A](shift: Shift[R, A]) def continuation: R !! A = shift
 
 }