AsyncMacro.global is gone

Author: xeno-by

src/main/scala/scala/async/internal/AnfTransform.scala

@@ -5,13 +5,13 @@
 
 package scala.async.internal
 
-import scala.tools.nsc.Global
 import scala.Predef._
+import scala.reflect.internal.util.Collections.map2
 
 private[async] trait AnfTransform {
   self: AsyncMacro =>
 
-  import c.universe.{gen => _, _}
+  import c.universe._
   import Flag._
   import c.internal._
   import decorators._
@@ -61,7 +61,7 @@ private[async] trait AnfTransform {
               } else {
                 val varDef = defineVar(name.ifRes, expr.tpe, tree.pos)
                 def branchWithAssign(orig: Tree) = api.typecheck(atPos(orig.pos) {
-                  def cast(t: Tree) = mkAttributedCastPreservingAnnotations(t, varDef.symbol.tpe)
+                  def cast(t: Tree) = mkAttributedCastPreservingAnnotations(t, tpe(varDef.symbol))
                   orig match {
                     case Block(thenStats, thenExpr) => Block(thenStats, Assign(Ident(varDef.symbol), cast(thenExpr)))
                     case _                          => Assign(Ident(varDef.symbol), cast(orig))
@@ -82,7 +82,7 @@ private[async] trait AnfTransform {
               else {
                 val varDef = defineVar(name.matchRes, expr.tpe, tree.pos)
                 def typedAssign(lhs: Tree) =
-                  api.typecheck(atPos(lhs.pos)(Assign(Ident(varDef.symbol), mkAttributedCastPreservingAnnotations(lhs, varDef.symbol.tpe))))
+                  api.typecheck(atPos(lhs.pos)(Assign(Ident(varDef.symbol), mkAttributedCastPreservingAnnotations(lhs, tpe(varDef.symbol)))))
                 val casesWithAssign = cases map {
                   case cd@CaseDef(pat, guard, body) =>
                     val newBody = body match {
@@ -102,7 +102,7 @@ private[async] trait AnfTransform {
 
         private def defineVar(prefix: String, tp: Type, pos: Position): ValDef = {
           val sym = api.currentOwner.newTermSymbol(name.fresh(prefix), pos, MUTABLE | SYNTHETIC).setInfo(uncheckedBounds(tp))
-          ValDef(sym, gen.mkZero(uncheckedBounds(tp))).setType(NoType).setPos(pos)
+          valDef(sym, gen.mkZero(uncheckedBounds(tp))).setType(NoType).setPos(pos)
         }
       }
 
@@ -129,7 +129,7 @@ private[async] trait AnfTransform {
       def defineVal(prefix: String, lhs: Tree, pos: Position): ValDef = {
         val sym = api.currentOwner.newTermSymbol(name.fresh(prefix), pos, SYNTHETIC).setInfo(uncheckedBounds(lhs.tpe))
         lhs.changeOwner(api.currentOwner, sym)
-        ValDef(sym, lhs.changeOwner(api.currentOwner, sym)).setType(NoType).setPos(pos)
+        valDef(sym, lhs.changeOwner(api.currentOwner, sym)).setType(NoType).setPos(pos)
       }
 
       object anf {
@@ -161,7 +161,7 @@ private[async] trait AnfTransform {
               val stats :+ expr1 = linearize.transformToList(expr)
               stats :+ treeCopy.Typed(tree, expr1, tpt)
 
-            case treeInfo.Applied(fun, targs, argss) if argss.nonEmpty =>
+            case q"$fun[..$targs](...$argss)" if argss.nonEmpty =>
               // we can assume that no await call appears in a by-name argument position,
               // this has already been checked.
               val funStats :+ simpleFun = linearize.transformToList(fun)
@@ -271,7 +271,7 @@ private[async] trait AnfTransform {
         case _: ValDef | _: DefDef | _: Function | _: ClassDef | _: TypeDef =>
           api.atOwner(tree.symbol)(anfLinearize(tree))
         case _: ModuleDef                                                   =>
-          api.atOwner(tree.symbol.moduleClass orElse tree.symbol)(anfLinearize(tree))
+          api.atOwner(tree.symbol.asModule.moduleClass orElse tree.symbol)(anfLinearize(tree))
         case _                                                              =>
           anfLinearize(tree)
       }

src/main/scala/scala/async/internal/AsyncAnalysis.scala

@@ -28,7 +28,7 @@ trait AsyncAnalysis {
     var hasUnsupportedAwaits = false
 
     override def nestedClass(classDef: ClassDef) {
-      val kind = if (classDef.symbol.isTrait) "trait" else "class"
+      val kind = if (classDef.symbol.asClass.isTrait) "trait" else "class"
       reportUnsupportedAwait(classDef, s"nested ${kind}")
     }
 

src/main/scala/scala/async/internal/AsyncBase.scala

@@ -45,10 +45,7 @@ abstract class AsyncBase {
     import c.universe._, c.internal._, decorators._
     val asyncMacro = AsyncMacro(c, self)
 
-    val code = asyncMacro.asyncTransform[T](
-      body.tree.asInstanceOf[asyncMacro.global.Tree],
-      execContext.tree.asInstanceOf[asyncMacro.global.Tree]
-    )(implicitly[c.WeakTypeTag[T]].asInstanceOf[asyncMacro.global.WeakTypeTag[T]]).asInstanceOf[Tree]
+    val code = asyncMacro.asyncTransform[T](body.tree, execContext.tree)(c.weakTypeTag[T])
     AsyncUtils.vprintln(s"async state machine transform expands to:\n ${code}")
 
     // Mark range positions for synthetic code as transparent to allow some wiggle room for overlapping ranges

src/main/scala/scala/async/internal/AsyncMacro.scala

@@ -1,19 +1,14 @@
 package scala.async.internal
 
-import scala.tools.nsc.Global
-import scala.tools.nsc.transform.TypingTransformers
-
 object AsyncMacro {
-  def apply(c0: reflect.macros.Context, base: AsyncBase): AsyncMacro = {
+  def apply(c0: reflect.macros.Context, base: AsyncBase): AsyncMacro { val c: c0.type } = {
     import language.reflectiveCalls
-    val powerContext = c0.asInstanceOf[c0.type { val universe: Global; val callsiteTyper: universe.analyzer.Typer }]
     new AsyncMacro { self =>
-      val c: scala.reflect.macros.Context { val universe: global.type } = c0.asInstanceOf[scala.reflect.macros.Context { val universe: global.type }]
-      val global: powerContext.universe.type   = powerContext.universe
+      val c: c0.type                                             = c0
       // This member is required by `AsyncTransform`:
-      val asyncBase: AsyncBase                 = base
+      val asyncBase: AsyncBase                                   = base
       // These members are required by `ExprBuilder`:
-      val futureSystem: FutureSystem           = base.futureSystem
+      val futureSystem: FutureSystem                             = base.futureSystem
       val futureSystemOps: futureSystem.Ops {val c: self.c.type} = futureSystem.mkOps(c)
     }
   }
@@ -23,9 +18,8 @@ private[async] trait AsyncMacro
   extends AnfTransform with TransformUtils with Lifter
   with ExprBuilder with AsyncTransform with AsyncAnalysis with LiveVariables {
 
-  val c: scala.reflect.macros.Context { val universe: global.type }
-  val global: Global
+  val c: scala.reflect.macros.Context
 
   lazy val macroPos = c.macroApplication.pos.makeTransparent
-  def atMacroPos(t: global.Tree) = c.universe.atPos(macroPos)(t)
+  def atMacroPos(t: c.Tree) = c.universe.atPos(macroPos)(t)
 }

src/main/scala/scala/async/internal/AsyncTransform.scala

@@ -3,7 +3,7 @@ package scala.async.internal
 trait AsyncTransform {
   self: AsyncMacro =>
 
-  import c.universe.{gen => _, _}
+  import c.universe._
   import c.internal._
   import decorators._
 
@@ -15,7 +15,7 @@ trait AsyncTransform {
     // We annotate the type of the whole expression as `T @uncheckedBounds` so as not to introduce
     // warnings about non-conformant LUBs. See SI-7694
     // This implicit propagates the annotated type in the type tag.
-    implicit val uncheckedBoundsResultTag: WeakTypeTag[T] = WeakTypeTag[T](rootMirror, FixedMirrorTypeCreator(rootMirror, uncheckedBounds(resultType.tpe)))
+    implicit val uncheckedBoundsResultTag: WeakTypeTag[T] = c.WeakTypeTag[T](uncheckedBounds(resultType.tpe))
 
     reportUnsupportedAwaits(body)
 
@@ -82,7 +82,7 @@ trait AsyncTransform {
           List(
             asyncBase.nullOut(c.universe)(c.Expr[String](Literal(Constant(fieldSym.name.toString))), c.Expr[Any](Ident(fieldSym))).tree
           ),
-          Assign(gen.mkAttributedStableRef(fieldSym.owner.thisType, fieldSym), gen.mkZero(fieldSym.info))
+          Assign(gen.mkAttributedStableRef(thisType(fieldSym.owner), fieldSym), gen.mkZero(fieldSym.info))
         )
       }
       val asyncState = asyncBlock.asyncStates.find(_.state == state).get
@@ -143,9 +143,9 @@ trait AsyncTransform {
     liftedSyms.foreach {
       sym =>
         if (sym != null) {
-          sym.owner = stateMachineClass
+          sym.setOwner(stateMachineClass)
           if (sym.isModule)
-            sym.moduleClass.owner = stateMachineClass
+            sym.asModule.moduleClass.setOwner(stateMachineClass)
         }
     }
     // Replace the ValDefs in the splicee with Assigns to the corresponding lifted
@@ -158,7 +158,7 @@ trait AsyncTransform {
       case ValDef(_, _, _, rhs) if liftedSyms(tree.symbol) =>
         api.atOwner(api.currentOwner) {
           val fieldSym = tree.symbol
-          val set = Assign(gen.mkAttributedStableRef(fieldSym.owner.thisType, fieldSym), api.recur(rhs))
+          val set = Assign(gen.mkAttributedStableRef(thisType(fieldSym.owner.asClass), fieldSym), api.recur(rhs))
           set.changeOwner(tree.symbol, api.currentOwner)
           api.typecheck(atPos(tree.pos)(set))
         }
@@ -167,7 +167,7 @@ trait AsyncTransform {
       case Ident(name) if liftedSyms(tree.symbol)          =>
         val fieldSym = tree.symbol
         atPos(tree.pos) {
-          gen.mkAttributedStableRef(fieldSym.owner.thisType, fieldSym).setType(tree.tpe)
+          gen.mkAttributedStableRef(thisType(fieldSym.owner.asClass), fieldSym).setType(tree.tpe)
         }
       case _                                               =>
         api.default(tree)

src/main/scala/scala/async/internal/ExprBuilder.scala

@@ -15,6 +15,7 @@ trait ExprBuilder {
 
   import c.universe._
   import defn._
+  import c.internal._
 
   val futureSystem: FutureSystem
   val futureSystemOps: futureSystem.Ops { val c: builder.c.type }

src/main/scala/scala/async/internal/Lifter.scala

@@ -4,6 +4,8 @@ trait Lifter {
   self: AsyncMacro =>
   import c.universe._
   import Flag._
+  import c.internal._
+  import decorators._
 
   /**
    * Identify which DefTrees are used (including transitively) which are declared
@@ -88,7 +90,7 @@ trait Lifter {
 
           // Only mark transitive references of defs, modules and classes. The RHS of lifted vals/vars
           // stays in its original location, so things that it refers to need not be lifted.
-          if (!(sym.isVal || sym.isVar))
+          if (!(sym.isTerm && (sym.asTerm.isVal || sym.asTerm.isVar)))
             defSymToReferenced(sym).foreach(sym2 => markForLift(sym2))
         }
       }
@@ -111,35 +113,35 @@ trait Lifter {
         val treeLifted = t match {
           case vd@ValDef(_, _, tpt, rhs)                    =>
             sym.setFlag(MUTABLE | STABLE | PRIVATE | LOCAL)
-            sym.name = name.fresh(sym.name.toTermName)
-            sym.modifyInfo(_.deconst)
+            sym.setName(name.fresh(sym.name.toTermName))
+            sym.setInfo(deconst(sym.info))
             val zeroRhs = atPos(t.pos)(gen.mkZero(vd.symbol.info))
-            treeCopy.ValDef(vd, Modifiers(sym.flags), sym.name, TypeTree(sym.tpe).setPos(t.pos), zeroRhs)
+            treeCopy.ValDef(vd, Modifiers(sym.flags), sym.name, TypeTree(tpe(sym)).setPos(t.pos), zeroRhs)
           case dd@DefDef(_, _, tparams, vparamss, tpt, rhs) =>
-            sym.name = this.name.fresh(sym.name.toTermName)
+            sym.setName(this.name.fresh(sym.name.toTermName))
             sym.setFlag(PRIVATE | LOCAL)
             // Was `DefDef(sym, rhs)`, but this ran afoul of `ToughTypeSpec.nestedMethodWithInconsistencyTreeAndInfoParamSymbols`
             // due to the handling of type parameter skolems in `thisMethodType` in `Namers`
             treeCopy.DefDef(dd, Modifiers(sym.flags), sym.name, tparams, vparamss, tpt, rhs)
           case cd@ClassDef(_, _, tparams, impl)             =>
-            sym.name = newTypeName(name.fresh(sym.name.toString).toString)
+            sym.setName(newTypeName(name.fresh(sym.name.toString).toString))
             companionship.companionOf(cd.symbol) match {
               case NoSymbol     =>
               case moduleSymbol =>
-                moduleSymbol.name = sym.name.toTermName
-                moduleSymbol.moduleClass.name = moduleSymbol.name.toTypeName
+                moduleSymbol.setName(sym.name.toTermName)
+                moduleSymbol.asModule.moduleClass.setName(moduleSymbol.name.toTypeName)
             }
             treeCopy.ClassDef(cd, Modifiers(sym.flags), sym.name, tparams, impl)
           case md@ModuleDef(_, _, impl)                     =>
             companionship.companionOf(md.symbol) match {
               case NoSymbol    =>
-                sym.name = name.fresh(sym.name.toTermName)
-                sym.moduleClass.name = sym.name.toTypeName
+                sym.setName(name.fresh(sym.name.toTermName))
+                sym.asModule.moduleClass.setName(sym.name.toTypeName)
               case classSymbol => // will be renamed by `case ClassDef` above.
             }
             treeCopy.ModuleDef(md, Modifiers(sym.flags), sym.name, impl)
           case td@TypeDef(_, _, tparams, rhs)               =>
-            sym.name = newTypeName(name.fresh(sym.name.toString).toString)
+            sym.setName(newTypeName(name.fresh(sym.name.toString).toString))
             treeCopy.TypeDef(td, Modifiers(sym.flags), sym.name, tparams, rhs)
         }
         atPos(t.pos)(treeLifted)

src/main/scala/scala/async/internal/LiveVariables.scala

@@ -55,7 +55,7 @@ trait LiveVariables {
 
     // determine which fields should be live also at the end (will not be nulled out)
     val noNull: Set[Symbol] = liftedSyms.filter { sym =>
-      sym.tpe.typeSymbol.isPrimitiveValueClass || liftables.exists { tree =>
+      tpe(sym).typeSymbol.asClass.isPrimitive || liftables.exists { tree =>
         !liftedSyms.contains(tree.symbol) && tree.exists(_.symbol == sym)
       }
     }

src/main/scala/scala/async/internal/TransformUtils.scala

@@ -5,15 +5,17 @@ package scala.async.internal
 
 import scala.reflect.macros.Context
 import reflect.ClassTag
+import scala.collection.immutable.ListMap
 
 /**
  * Utilities used in both `ExprBuilder` and `AnfTransform`.
  */
 private[async] trait TransformUtils {
   self: AsyncMacro =>
 
-  import c.universe.{gen => _, _}
+  import c.universe._
   import c.internal._
+  import decorators._
 
   object name {
     val resume        = newTermName("resume")
@@ -51,7 +53,7 @@ private[async] trait TransformUtils {
     if (Boolean_ShortCircuits contains fun.symbol) (i, j) => true
     else {
       val paramss = fun.tpe.paramss
-      val byNamess = paramss.map(_.map(_.isByNameParam))
+      val byNamess = paramss.map(_.map(_.asTerm.isByNameParam))
       (i, j) => util.Try(byNamess(i)(j)).getOrElse(false)
     }
   }
@@ -86,10 +88,6 @@ private[async] trait TransformUtils {
     val Async_await   = asyncBase.awaitMethod(c.universe)(c.macroApplication.symbol).ensuring(_ != NoSymbol)
   }
 
-  def isSafeToInline(tree: Tree) = {
-    treeInfo.isExprSafeToInline(tree)
-  }
-
   // `while(await(x))` ... or `do { await(x); ... } while(...)` contain an `If` that loops;
   // we must break that `If` into states so that it convert the label jump into a state machine
   // transition
@@ -192,7 +190,7 @@ private[async] trait TransformUtils {
         case dd: DefDef            => nestedMethod(dd)
         case fun: Function         => function(fun)
         case m@Match(EmptyTree, _) => patMatFunction(m) // Pattern matching anonymous function under -Xoldpatmat of after `restorePatternMatchingFunctions`
-        case treeInfo.Applied(fun, targs, argss) if argss.nonEmpty =>
+        case q"$fun[..$targs](...$argss)" if argss.nonEmpty =>
           val isInByName = isByName(fun)
           for ((args, i) <- argss.zipWithIndex) {
             for ((arg, j) <- args.zipWithIndex) {
@@ -219,11 +217,42 @@ private[async] trait TransformUtils {
   // Attributed version of `TreeGen#mkCastPreservingAnnotations`
   def mkAttributedCastPreservingAnnotations(tree: Tree, tp: Type): Tree = {
     atPos(tree.pos) {
-      val casted = c.typecheck(gen.mkCast(tree, uncheckedBounds(tp.withoutAnnotations).dealias))
+      val casted = c.typecheck(gen.mkCast(tree, uncheckedBounds(withoutAnnotations(tp)).dealias))
       Typed(casted, TypeTree(tp)).setType(tp)
     }
   }
 
+  def deconst(tp: Type): Type = tp match {
+    case AnnotatedType(anns, underlying) => annotatedType(anns, deconst(underlying))
+    case ExistentialType(quants, underlying) => existentialType(quants, deconst(underlying))
+    case ConstantType(value) => deconst(value.tpe)
+    case _ => tp
+  }
+
+  def withAnnotation(tp: Type, ann: Annotation): Type = withAnnotations(tp, List(ann))
+
+  def withAnnotations(tp: Type, anns: List[Annotation]): Type = tp match {
+    case AnnotatedType(existingAnns, underlying) => annotatedType(anns ::: existingAnns, underlying)
+    case ExistentialType(quants, underlying) => existentialType(quants, withAnnotations(underlying, anns))
+    case _ => annotatedType(anns, tp)
+  }
+
+  def withoutAnnotations(tp: Type): Type = tp match {
+    case AnnotatedType(anns, underlying) => withoutAnnotations(underlying)
+    case ExistentialType(quants, underlying) => existentialType(quants, withoutAnnotations(underlying))
+    case _ => tp
+  }
+
+  def tpe(sym: Symbol): Type = {
+    if (sym.isType) sym.asType.toType
+    else sym.info
+  }
+
+  def thisType(sym: Symbol): Type = {
+    if (sym.isClass) sym.asClass.thisPrefix
+    else NoPrefix
+  }
+
   // =====================================
   // Copy/Pasted from Scala 2.10.3. See SI-7694.
   private lazy val UncheckedBoundsClass = {
@@ -232,7 +261,7 @@ private[async] trait TransformUtils {
   }
   final def uncheckedBounds(tp: Type): Type = {
     if (tp.typeArgs.isEmpty || UncheckedBoundsClass == NoSymbol) tp
-    else tp.withAnnotation(AnnotationInfo marker UncheckedBoundsClass.tpe)
+    else withAnnotation(tp, Annotation(UncheckedBoundsClass.asType.toType, Nil, ListMap()))
   }
   // =====================================
 }