diff --git a/.scalafix.conf b/.scalafix.conf
index 53fd4b5f589e..b084cb6cba83 100644
--- a/.scalafix.conf
+++ b/.scalafix.conf
@@ -1,3 +1,3 @@
 rules = [OrganizeImports]
 OrganizeImports.removeUnused = false
-OrganizeImports.targetDialect = Scala2
+OrganizeImports.targetDialect = Scala3
diff --git a/compiler/src/dotty/tools/backend/jvm/BCodeAsmCommon.scala b/compiler/src/dotty/tools/backend/jvm/BCodeAsmCommon.scala
index f2f5865843c8..06ee72f78088 100644
--- a/compiler/src/dotty/tools/backend/jvm/BCodeAsmCommon.scala
+++ b/compiler/src/dotty/tools/backend/jvm/BCodeAsmCommon.scala
@@ -2,8 +2,8 @@ package dotty.tools
 package backend
 package jvm
 
-import dotty.tools.dotc.core.Flags._
-import dotty.tools.dotc.core.Symbols._
+import dotty.tools.dotc.core.Flags.*
+import dotty.tools.dotc.core.Symbols.*
 import dotty.tools.dotc.report
 
 import scala.language.unsafeNulls
diff --git a/compiler/src/dotty/tools/backend/jvm/BCodeBodyBuilder.scala b/compiler/src/dotty/tools/backend/jvm/BCodeBodyBuilder.scala
index 0b6dcb7df3c1..62ed65f8ee3c 100644
--- a/compiler/src/dotty/tools/backend/jvm/BCodeBodyBuilder.scala
+++ b/compiler/src/dotty/tools/backend/jvm/BCodeBodyBuilder.scala
@@ -4,18 +4,18 @@ package jvm
 
 import dotty.tools.dotc.CompilationUnit
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core.Constants._
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Constants.*
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.Decorators.em
-import dotty.tools.dotc.core.Flags.{Label => LabelFlag, _}
-import dotty.tools.dotc.core.Phases._
+import dotty.tools.dotc.core.Flags.{Label as LabelFlag, *}
+import dotty.tools.dotc.core.Phases.*
 import dotty.tools.dotc.core.StdNames.nme
 import dotty.tools.dotc.core.StdNames.str
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.core.Types._
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.core.Types.*
 import dotty.tools.dotc.report
 import dotty.tools.dotc.transform.Erasure
-import dotty.tools.dotc.util.Spans._
+import dotty.tools.dotc.util.Spans.*
 
 import scala.annotation.switch
 import scala.annotation.tailrec
diff --git a/compiler/src/dotty/tools/backend/jvm/BCodeHelpers.scala b/compiler/src/dotty/tools/backend/jvm/BCodeHelpers.scala
index d24680941535..c06de52916ad 100644
--- a/compiler/src/dotty/tools/backend/jvm/BCodeHelpers.scala
+++ b/compiler/src/dotty/tools/backend/jvm/BCodeHelpers.scala
@@ -6,21 +6,21 @@ import dotty.tools.backend.jvm.DottyBackendInterface.symExtensions
 import dotty.tools.dotc.CompilationUnit
 import dotty.tools.dotc.ast.Trees
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core.Annotations._
-import dotty.tools.dotc.core.Constants._
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Decorators._
-import dotty.tools.dotc.core.Flags._
+import dotty.tools.dotc.core.Annotations.*
+import dotty.tools.dotc.core.Constants.*
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Decorators.*
+import dotty.tools.dotc.core.Flags.*
 import dotty.tools.dotc.core.NameKinds
 import dotty.tools.dotc.core.NameKinds.ExpandedName
 import dotty.tools.dotc.core.Names.Name
-import dotty.tools.dotc.core.Phases._
+import dotty.tools.dotc.core.Phases.*
 import dotty.tools.dotc.core.Signature
-import dotty.tools.dotc.core.StdNames._
-import dotty.tools.dotc.core.Symbols._
+import dotty.tools.dotc.core.StdNames.*
+import dotty.tools.dotc.core.Symbols.*
 import dotty.tools.dotc.core.TypeErasure
 import dotty.tools.dotc.core.Types
-import dotty.tools.dotc.core.Types._
+import dotty.tools.dotc.core.Types.*
 import dotty.tools.dotc.report
 import dotty.tools.dotc.transform.ElimErasedValueType
 import dotty.tools.dotc.transform.GenericSignatures
diff --git a/compiler/src/dotty/tools/backend/jvm/BCodeSkelBuilder.scala b/compiler/src/dotty/tools/backend/jvm/BCodeSkelBuilder.scala
index ffdb76bfcb24..cfbc07e7c402 100644
--- a/compiler/src/dotty/tools/backend/jvm/BCodeSkelBuilder.scala
+++ b/compiler/src/dotty/tools/backend/jvm/BCodeSkelBuilder.scala
@@ -6,16 +6,16 @@ import dotty.tools.dotc.CompilationUnit
 import dotty.tools.dotc.ast.TreeTypeMap
 import dotty.tools.dotc.ast.Trees.SyntheticUnit
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Decorators._
-import dotty.tools.dotc.core.Flags._
-import dotty.tools.dotc.core.NameKinds._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Decorators.*
+import dotty.tools.dotc.core.Flags.*
+import dotty.tools.dotc.core.NameKinds.*
 import dotty.tools.dotc.core.Names.TermName
-import dotty.tools.dotc.core.StdNames._
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.core.Types._
+import dotty.tools.dotc.core.StdNames.*
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.core.Types.*
 import dotty.tools.dotc.report
-import dotty.tools.dotc.util.Spans._
+import dotty.tools.dotc.util.Spans.*
 
 import scala.annotation.tailrec
 import scala.collection.immutable
diff --git a/compiler/src/dotty/tools/backend/jvm/BCodeSyncAndTry.scala b/compiler/src/dotty/tools/backend/jvm/BCodeSyncAndTry.scala
index 9d6d1f6a1664..380874207ab2 100644
--- a/compiler/src/dotty/tools/backend/jvm/BCodeSyncAndTry.scala
+++ b/compiler/src/dotty/tools/backend/jvm/BCodeSyncAndTry.scala
@@ -5,7 +5,7 @@ package jvm
 import dotty.tools.dotc.CompilationUnit
 import dotty.tools.dotc.ast.tpd
 import dotty.tools.dotc.core.StdNames.nme
-import dotty.tools.dotc.core.Symbols._
+import dotty.tools.dotc.core.Symbols.*
 
 import scala.collection.immutable
 import scala.language.unsafeNulls
diff --git a/compiler/src/dotty/tools/backend/jvm/BTypesFromSymbols.scala b/compiler/src/dotty/tools/backend/jvm/BTypesFromSymbols.scala
index 6ef9feb3a8ce..8c66080d5e65 100644
--- a/compiler/src/dotty/tools/backend/jvm/BTypesFromSymbols.scala
+++ b/compiler/src/dotty/tools/backend/jvm/BTypesFromSymbols.scala
@@ -2,13 +2,13 @@ package dotty.tools
 package backend
 package jvm
 
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Flags._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Flags.*
 import dotty.tools.dotc.core.Phases
+import dotty.tools.dotc.core.Phases.*
 import dotty.tools.dotc.core.Phases.Phase
-import dotty.tools.dotc.core.Phases._
 import dotty.tools.dotc.core.StdNames
-import dotty.tools.dotc.core.Symbols._
+import dotty.tools.dotc.core.Symbols.*
 
 import scala.annotation.threadUnsafe
 import scala.collection.mutable
diff --git a/compiler/src/dotty/tools/backend/jvm/BackendUtils.scala b/compiler/src/dotty/tools/backend/jvm/BackendUtils.scala
index da1fbd593949..1494ac7d491f 100644
--- a/compiler/src/dotty/tools/backend/jvm/BackendUtils.scala
+++ b/compiler/src/dotty/tools/backend/jvm/BackendUtils.scala
@@ -3,7 +3,7 @@ package dotty.tools.backend.jvm
 import dotty.tools.dotc.report
 
 import scala.collection.mutable
-import scala.jdk.CollectionConverters._
+import scala.jdk.CollectionConverters.*
 import scala.language.unsafeNulls
 import scala.tools.asm
 import scala.tools.asm.Handle
diff --git a/compiler/src/dotty/tools/backend/jvm/ClassfileWriters.scala b/compiler/src/dotty/tools/backend/jvm/ClassfileWriters.scala
index 1702ec146637..21f54cfb4fd7 100644
--- a/compiler/src/dotty/tools/backend/jvm/ClassfileWriters.scala
+++ b/compiler/src/dotty/tools/backend/jvm/ClassfileWriters.scala
@@ -1,6 +1,6 @@
 package dotty.tools.backend.jvm
 
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.Decorators.em
 import dotty.tools.io.AbstractFile
 import dotty.tools.io.JarArchive
@@ -15,7 +15,7 @@ import java.nio.ByteBuffer
 import java.nio.channels.ClosedByInterruptException
 import java.nio.channels.FileChannel
 import java.nio.charset.StandardCharsets.UTF_8
-import java.nio.file._
+import java.nio.file.*
 import java.nio.file.attribute.FileAttribute
 import java.util
 import java.util.concurrent.ConcurrentHashMap
@@ -24,7 +24,7 @@ import java.util.zip.Deflater
 import java.util.zip.ZipEntry
 import java.util.zip.ZipOutputStream
 import scala.language.unsafeNulls
-import scala.util.chaining._
+import scala.util.chaining.*
 
 import BTypes.InternalName
 
diff --git a/compiler/src/dotty/tools/backend/jvm/CodeGen.scala b/compiler/src/dotty/tools/backend/jvm/CodeGen.scala
index 1e001b2d99ab..0d5b55c6ddb4 100644
--- a/compiler/src/dotty/tools/backend/jvm/CodeGen.scala
+++ b/compiler/src/dotty/tools/backend/jvm/CodeGen.scala
@@ -4,8 +4,8 @@ import dotty.tools.dotc.CompilationUnit
 import dotty.tools.dotc.ast.Trees.PackageDef
 import dotty.tools.dotc.ast.Trees.ValDef
 import dotty.tools.dotc.ast.tpd
+import dotty.tools.dotc.core.*
 import dotty.tools.dotc.core.Phases.Phase
-import dotty.tools.dotc.core._
 import dotty.tools.dotc.core.tasty.TastyUnpickler
 import dotty.tools.dotc.interfaces
 import dotty.tools.dotc.report
@@ -20,16 +20,16 @@ import java.io.DataOutputStream
 import java.nio.channels.ClosedByInterruptException
 import java.util.Optional
 import scala.collection.mutable
-import scala.jdk.CollectionConverters._
+import scala.jdk.CollectionConverters.*
 import scala.language.unsafeNulls
 import scala.tools.asm
-import scala.tools.asm.tree._
+import scala.tools.asm.tree.*
 
-import Contexts._
-import Phases._
-import Symbols._
+import Contexts.*
+import Phases.*
+import Symbols.*
 import StdNames.nme
-import tpd._
+import tpd.*
 
 
 class CodeGen(val int: DottyBackendInterface, val primitives: DottyPrimitives)( val bTypes: BTypesFromSymbols[int.type]) { self =>
diff --git a/compiler/src/dotty/tools/backend/jvm/CollectSuperCalls.scala b/compiler/src/dotty/tools/backend/jvm/CollectSuperCalls.scala
index e9739e6481c2..725c6f7fc99d 100644
--- a/compiler/src/dotty/tools/backend/jvm/CollectSuperCalls.scala
+++ b/compiler/src/dotty/tools/backend/jvm/CollectSuperCalls.scala
@@ -1,10 +1,10 @@
 package dotty.tools.backend.jvm
 
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.Flags.Trait
-import dotty.tools.dotc.core.Phases._
-import dotty.tools.dotc.core.Symbols._
+import dotty.tools.dotc.core.Phases.*
+import dotty.tools.dotc.core.Symbols.*
 import dotty.tools.dotc.transform.MegaPhase.MiniPhase
 
 /** Collect all super calls to trait members.
diff --git a/compiler/src/dotty/tools/backend/jvm/CoreBTypes.scala b/compiler/src/dotty/tools/backend/jvm/CoreBTypes.scala
index 714c93ceaa2b..6f718ae4f4dc 100644
--- a/compiler/src/dotty/tools/backend/jvm/CoreBTypes.scala
+++ b/compiler/src/dotty/tools/backend/jvm/CoreBTypes.scala
@@ -4,7 +4,7 @@ package jvm
 
 
 import dotty.tools.dotc.core.StdNames
-import dotty.tools.dotc.core.Symbols._
+import dotty.tools.dotc.core.Symbols.*
 import dotty.tools.dotc.transform.Erasure
 
 import scala.tools.asm.Handle
diff --git a/compiler/src/dotty/tools/backend/jvm/DottyBackendInterface.scala b/compiler/src/dotty/tools/backend/jvm/DottyBackendInterface.scala
index 2b5f2f5472fe..f43612146af7 100644
--- a/compiler/src/dotty/tools/backend/jvm/DottyBackendInterface.scala
+++ b/compiler/src/dotty/tools/backend/jvm/DottyBackendInterface.scala
@@ -1,22 +1,22 @@
 package dotty.tools.backend.jvm
 
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core.Flags._
-import dotty.tools.dotc.core._
+import dotty.tools.dotc.core.*
+import dotty.tools.dotc.core.Flags.*
 import dotty.tools.dotc.report
 import dotty.tools.dotc.util.ReadOnlyMap
 import dotty.tools.io.AbstractFile
 
-import java.io.{File => _}
+import java.io.File as _
 import scala.language.unsafeNulls
 import scala.reflect.ClassTag
 
-import Contexts._
-import Types._
-import Symbols._
-import Phases._
+import Contexts.*
+import Types.*
+import Symbols.*
+import Phases.*
 import Decorators.em
-import tpd._
+import tpd.*
 import StdNames.nme
 import NameKinds.{LazyBitMapName, LazyLocalName}
 import Names.Name
diff --git a/compiler/src/dotty/tools/backend/jvm/GenBCode.scala b/compiler/src/dotty/tools/backend/jvm/GenBCode.scala
index aa49388d0dba..887164937c2b 100644
--- a/compiler/src/dotty/tools/backend/jvm/GenBCode.scala
+++ b/compiler/src/dotty/tools/backend/jvm/GenBCode.scala
@@ -1,17 +1,17 @@
 package dotty.tools.backend.jvm
 
 import dotty.tools.dotc.CompilationUnit
+import dotty.tools.dotc.core.*
 import dotty.tools.dotc.core.Phases.Phase
-import dotty.tools.dotc.core._
 import dotty.tools.dotc.interfaces.CompilerCallback
 import dotty.tools.dotc.report
-import dotty.tools.io._
+import dotty.tools.io.*
 
 import scala.collection.mutable
 import scala.compiletime.uninitialized
 
-import Contexts._
-import Symbols._
+import Contexts.*
+import Symbols.*
 
 class GenBCode extends Phase { self =>
 
diff --git a/compiler/src/dotty/tools/backend/jvm/GeneratedClassHandler.scala b/compiler/src/dotty/tools/backend/jvm/GeneratedClassHandler.scala
index 527f0cdfff15..de5f5f327c47 100644
--- a/compiler/src/dotty/tools/backend/jvm/GeneratedClassHandler.scala
+++ b/compiler/src/dotty/tools/backend/jvm/GeneratedClassHandler.scala
@@ -1,14 +1,14 @@
 package dotty.tools.backend.jvm
 
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.Decorators.em
 import dotty.tools.dotc.core.Phases
 import dotty.tools.dotc.profile.ThreadPoolFactory
 import dotty.tools.io.AbstractFile
 
 import java.nio.channels.ClosedByInterruptException
+import java.util.concurrent.*
 import java.util.concurrent.ThreadPoolExecutor.CallerRunsPolicy
-import java.util.concurrent._
 import scala.collection.mutable.ListBuffer
 import scala.compiletime.uninitialized
 import scala.concurrent.Await
diff --git a/compiler/src/dotty/tools/backend/jvm/GenericSignatureVisitor.scala b/compiler/src/dotty/tools/backend/jvm/GenericSignatureVisitor.scala
index 6be94fbc76cf..221f9a0f6cdb 100644
--- a/compiler/src/dotty/tools/backend/jvm/GenericSignatureVisitor.scala
+++ b/compiler/src/dotty/tools/backend/jvm/GenericSignatureVisitor.scala
@@ -1,13 +1,13 @@
 package dotty.tools.backend.jvm
 
-import scala.annotation._
+import scala.annotation.*
 import scala.collection.mutable
-import scala.jdk.CollectionConverters._
+import scala.jdk.CollectionConverters.*
 import scala.language.unsafeNulls
 import scala.tools.asm.ClassReader
 import scala.tools.asm.Handle
 import scala.tools.asm.Type
-import scala.tools.asm.tree._
+import scala.tools.asm.tree.*
 import scala.util.control.NoStackTrace
 import scala.util.control.NonFatal
 
diff --git a/compiler/src/dotty/tools/backend/jvm/PostProcessor.scala b/compiler/src/dotty/tools/backend/jvm/PostProcessor.scala
index 7d5b156d8d4d..71f9cb4bab3e 100644
--- a/compiler/src/dotty/tools/backend/jvm/PostProcessor.scala
+++ b/compiler/src/dotty/tools/backend/jvm/PostProcessor.scala
@@ -1,6 +1,6 @@
 package dotty.tools.backend.jvm
 
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.Decorators.em
 import dotty.tools.dotc.util.NoSourcePosition
 import dotty.tools.dotc.util.SourcePosition
diff --git a/compiler/src/dotty/tools/backend/jvm/PostProcessorFrontendAccess.scala b/compiler/src/dotty/tools/backend/jvm/PostProcessorFrontendAccess.scala
index ac3e73a5b035..702476b071ae 100644
--- a/compiler/src/dotty/tools/backend/jvm/PostProcessorFrontendAccess.scala
+++ b/compiler/src/dotty/tools/backend/jvm/PostProcessorFrontendAccess.scala
@@ -4,11 +4,11 @@ import dotty.tools.dotc.core.Contexts.Context
 import dotty.tools.dotc.core.Phases
 import dotty.tools.dotc.report
 import dotty.tools.dotc.reporting.Message
-import dotty.tools.dotc.util._
+import dotty.tools.dotc.util.*
 import dotty.tools.io.AbstractFile
 
-import java.util.{Collection => JCollection}
-import java.util.{Map => JMap}
+import java.util.Collection as JCollection
+import java.util.Map as JMap
 import scala.collection.mutable.Clearable
 import scala.collection.mutable.HashSet
 import scala.compiletime.uninitialized
diff --git a/compiler/src/dotty/tools/backend/jvm/scalaPrimitives.scala b/compiler/src/dotty/tools/backend/jvm/scalaPrimitives.scala
index 7d7478f36a26..fac7c7d33602 100644
--- a/compiler/src/dotty/tools/backend/jvm/scalaPrimitives.scala
+++ b/compiler/src/dotty/tools/backend/jvm/scalaPrimitives.scala
@@ -4,11 +4,11 @@ package backend.jvm
 import scala.annotation.threadUnsafe
 
 import dotc.ast.Trees.Select
-import dotc.ast.tpd._
-import dotc.core._
-import Contexts._
+import dotc.ast.tpd.*
+import dotc.core.*
+import Contexts.*
 import Names.TermName
-import StdNames._
+import StdNames.*
 import Types.{JavaArrayType, UnspecifiedErrorType, Type}
 import Symbols.{Symbol, NoSymbol}
 import Decorators.em
diff --git a/compiler/src/dotty/tools/backend/sjs/GenSJSIR.scala b/compiler/src/dotty/tools/backend/sjs/GenSJSIR.scala
index 937163eda328..36e81955898e 100644
--- a/compiler/src/dotty/tools/backend/sjs/GenSJSIR.scala
+++ b/compiler/src/dotty/tools/backend/sjs/GenSJSIR.scala
@@ -1,9 +1,9 @@
 package dotty.tools.backend.sjs
 
-import dotty.tools.dotc.core._
+import dotty.tools.dotc.core.*
 
-import Contexts._
-import Phases._
+import Contexts.*
+import Phases.*
 
 /** Generates Scala.js IR files for the compilation unit. */
 class GenSJSIR extends Phase {
diff --git a/compiler/src/dotty/tools/backend/sjs/JSCodeGen.scala b/compiler/src/dotty/tools/backend/sjs/JSCodeGen.scala
index 48aa625ca830..55a4866b138b 100644
--- a/compiler/src/dotty/tools/backend/sjs/JSCodeGen.scala
+++ b/compiler/src/dotty/tools/backend/sjs/JSCodeGen.scala
@@ -3,41 +3,41 @@ package dotty.tools.backend.sjs
 import dotty.tools.FatalError
 import dotty.tools.dotc.CompilationUnit
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core._
+import dotty.tools.dotc.core.*
 import dotty.tools.dotc.report
 import dotty.tools.dotc.transform.Erasure
 import dotty.tools.dotc.transform.ValueClasses
-import dotty.tools.dotc.transform.sjs.JSSymUtils._
+import dotty.tools.dotc.transform.sjs.JSSymUtils.*
 import dotty.tools.dotc.util.SourcePosition
 import org.scalajs.ir
 import org.scalajs.ir.ClassKind
+import org.scalajs.ir.Names as jsNames
 import org.scalajs.ir.Names.ClassName
 import org.scalajs.ir.Names.MethodName
 import org.scalajs.ir.Names.SimpleMethodName
 import org.scalajs.ir.OriginalName
 import org.scalajs.ir.OriginalName.NoOriginalName
 import org.scalajs.ir.Position
+import org.scalajs.ir.Trees as js
 import org.scalajs.ir.Trees.OptimizerHints
-import org.scalajs.ir.{Names => jsNames}
-import org.scalajs.ir.{Trees => js}
-import org.scalajs.ir.{Types => jstpe}
+import org.scalajs.ir.Types as jstpe
 
 import scala.annotation.switch
 import scala.collection.mutable
 import scala.language.unsafeNulls
 import scala.reflect.NameTransformer
 
-import Contexts._
-import Decorators._
-import Flags._
-import Names._
+import Contexts.*
+import Decorators.*
+import Flags.*
+import Names.*
 import NameKinds.DefaultGetterName
-import Types._
-import Symbols._
-import Phases._
-import StdNames._
+import Types.*
+import Symbols.*
+import Phases.*
+import StdNames.*
 import TypeErasure.ErasedValueType
-import JSEncoding._
+import JSEncoding.*
 import ScopedVar.withScopedVars
 
 /** Main codegen for Scala.js IR.
diff --git a/compiler/src/dotty/tools/backend/sjs/JSDefinitions.scala b/compiler/src/dotty/tools/backend/sjs/JSDefinitions.scala
index c8371a149ceb..e2977c78fbd8 100644
--- a/compiler/src/dotty/tools/backend/sjs/JSDefinitions.scala
+++ b/compiler/src/dotty/tools/backend/sjs/JSDefinitions.scala
@@ -1,17 +1,17 @@
 package dotty.tools.backend.sjs
 
 import dotty.tools.dotc.config.SJSPlatform
-import dotty.tools.dotc.core._
+import dotty.tools.dotc.core.*
 
 import scala.annotation.threadUnsafe
 import scala.compiletime.uninitialized
 import scala.language.unsafeNulls
 
-import Names._
-import Types._
-import Contexts._
-import Symbols._
-import StdNames._
+import Names.*
+import Types.*
+import Contexts.*
+import Symbols.*
+import StdNames.*
 
 object JSDefinitions {
   /** The Scala.js-specific definitions for the current context. */
diff --git a/compiler/src/dotty/tools/backend/sjs/JSEncoding.scala b/compiler/src/dotty/tools/backend/sjs/JSEncoding.scala
index cf6bce4ef4d5..6ee4e97e31f4 100644
--- a/compiler/src/dotty/tools/backend/sjs/JSEncoding.scala
+++ b/compiler/src/dotty/tools/backend/sjs/JSEncoding.scala
@@ -1,8 +1,8 @@
 package dotty.tools.backend.sjs
 
 import dotty.tools.backend.jvm.DottyBackendInterface.symExtensions
-import dotty.tools.dotc.core._
-import dotty.tools.dotc.transform.sjs.JSSymUtils._
+import dotty.tools.dotc.core.*
+import dotty.tools.dotc.transform.sjs.JSSymUtils.*
 import org.scalajs.ir
 import org.scalajs.ir.Names.ClassName
 import org.scalajs.ir.Names.FieldName
@@ -12,20 +12,20 @@ import org.scalajs.ir.Names.MethodName
 import org.scalajs.ir.Names.SimpleMethodName
 import org.scalajs.ir.OriginalName
 import org.scalajs.ir.OriginalName.NoOriginalName
+import org.scalajs.ir.Trees as js
+import org.scalajs.ir.Types as jstpe
 import org.scalajs.ir.UTF8String
-import org.scalajs.ir.{Trees => js}
-import org.scalajs.ir.{Types => jstpe}
 
 import scala.collection.mutable
 import scala.language.unsafeNulls
 
-import Contexts._
-import Flags._
-import Types._
-import Symbols._
-import NameOps._
-import Names._
-import StdNames._
+import Contexts.*
+import Flags.*
+import Types.*
+import Symbols.*
+import NameOps.*
+import Names.*
+import StdNames.*
 import JSDefinitions.jsdefn
 
 /** Encoding of symbol names for JavaScript
diff --git a/compiler/src/dotty/tools/backend/sjs/JSExportsGen.scala b/compiler/src/dotty/tools/backend/sjs/JSExportsGen.scala
index dd0eaf02b71d..d15b2f0a8883 100644
--- a/compiler/src/dotty/tools/backend/sjs/JSExportsGen.scala
+++ b/compiler/src/dotty/tools/backend/sjs/JSExportsGen.scala
@@ -1,36 +1,36 @@
 package dotty.tools.backend.sjs
 
-import dotty.tools.dotc.core._
+import dotty.tools.dotc.core.*
 import dotty.tools.dotc.report
-import dotty.tools.dotc.transform.sjs.JSExportUtils._
-import dotty.tools.dotc.transform.sjs.JSSymUtils._
+import dotty.tools.dotc.transform.sjs.JSExportUtils.*
+import dotty.tools.dotc.transform.sjs.JSSymUtils.*
 import dotty.tools.dotc.util.SourcePosition
 import dotty.tools.dotc.util.SrcPos
+import org.scalajs.ir.Names as jsNames
 import org.scalajs.ir.Names.DefaultModuleID
 import org.scalajs.ir.OriginalName.NoOriginalName
 import org.scalajs.ir.Position
 import org.scalajs.ir.Position.NoPosition
+import org.scalajs.ir.Trees as js
 import org.scalajs.ir.Trees.OptimizerHints
-import org.scalajs.ir.{Names => jsNames}
-import org.scalajs.ir.{Trees => js}
-import org.scalajs.ir.{Types => jstpe}
+import org.scalajs.ir.Types as jstpe
 
 import scala.annotation.tailrec
 import scala.collection.mutable
 import scala.language.unsafeNulls
 
-import Contexts._
-import Decorators._
-import Denotations._
-import Flags._
-import Names._
+import Contexts.*
+import Decorators.*
+import Denotations.*
+import Flags.*
+import Names.*
 import NameKinds.DefaultGetterName
-import NameOps._
-import Phases._
-import Symbols._
-import Types._
+import NameOps.*
+import Phases.*
+import Symbols.*
+import Types.*
 import TypeErasure.ErasedValueType
-import JSEncoding._
+import JSEncoding.*
 
 final class JSExportsGen(jsCodeGen: JSCodeGen)(using Context) {
   import jsCodeGen.*
diff --git a/compiler/src/dotty/tools/backend/sjs/JSPositions.scala b/compiler/src/dotty/tools/backend/sjs/JSPositions.scala
index 1d01e4bd9014..061a6d414fb9 100644
--- a/compiler/src/dotty/tools/backend/sjs/JSPositions.scala
+++ b/compiler/src/dotty/tools/backend/sjs/JSPositions.scala
@@ -1,6 +1,6 @@
 package dotty.tools.backend.sjs
 
-import dotty.tools.dotc.core._
+import dotty.tools.dotc.core.*
 import dotty.tools.dotc.report
 import dotty.tools.dotc.util.SourceFile
 import dotty.tools.dotc.util.SourcePosition
@@ -11,7 +11,7 @@ import java.net.URI
 import java.net.URISyntaxException
 import scala.language.unsafeNulls
 
-import Contexts._
+import Contexts.*
 import Decorators.em
 
 /** Conversion utilities from dotty Positions to IR Positions. */
diff --git a/compiler/src/dotty/tools/backend/sjs/JSPrimitives.scala b/compiler/src/dotty/tools/backend/sjs/JSPrimitives.scala
index 4e394cf57ffd..30d3cc828e14 100644
--- a/compiler/src/dotty/tools/backend/sjs/JSPrimitives.scala
+++ b/compiler/src/dotty/tools/backend/sjs/JSPrimitives.scala
@@ -1,15 +1,15 @@
 package dotty.tools.backend.sjs
 
 import dotty.tools.backend.jvm.DottyPrimitives
-import dotty.tools.dotc.ast.tpd._
-import dotty.tools.dotc.core._
+import dotty.tools.dotc.ast.tpd.*
+import dotty.tools.dotc.core.*
 import dotty.tools.dotc.report
 import dotty.tools.dotc.util.ReadOnlyMap
 
 import Names.TermName
-import Types._
-import Contexts._
-import Symbols._
+import Types.*
+import Contexts.*
+import Symbols.*
 import Decorators.em
 
 object JSPrimitives {
diff --git a/compiler/src/dotty/tools/dotc/Bench.scala b/compiler/src/dotty/tools/dotc/Bench.scala
index 0d1190e6ec93..d3e129c1ef62 100644
--- a/compiler/src/dotty/tools/dotc/Bench.scala
+++ b/compiler/src/dotty/tools/dotc/Bench.scala
@@ -4,7 +4,7 @@ package dotc
 import scala.annotation.internal.sharable
 import scala.compiletime.uninitialized
 
-import core.Contexts._
+import core.Contexts.*
 import reporting.Reporter
 import io.AbstractFile
 
diff --git a/compiler/src/dotty/tools/dotc/CompilationUnit.scala b/compiler/src/dotty/tools/dotc/CompilationUnit.scala
index 53e33346d007..ba6cbf676094 100644
--- a/compiler/src/dotty/tools/dotc/CompilationUnit.scala
+++ b/compiler/src/dotty/tools/dotc/CompilationUnit.scala
@@ -4,10 +4,10 @@ package dotc
 import scala.annotation.internal.sharable
 import scala.util.control.NoStackTrace
 
-import core._
-import Contexts._
+import core.*
+import Contexts.*
 import SymDenotations.ClassDenotation
-import Symbols._
+import Symbols.*
 import Comments.Comment
 import util.{FreshNameCreator, SourceFile, NoSource}
 import util.Spans.Span
@@ -15,7 +15,7 @@ import ast.{tpd, untpd}
 import tpd.{Tree, TreeTraverser}
 import ast.Trees.{Import, Ident}
 import typer.Nullables
-import core.Decorators._
+import core.Decorators.*
 import config.{SourceVersion, Feature}
 import StdNames.nme
 import transform.MacroAnnotations
diff --git a/compiler/src/dotty/tools/dotc/Compiler.scala b/compiler/src/dotty/tools/dotc/Compiler.scala
index 51a82f8999ac..575cf28c73da 100644
--- a/compiler/src/dotty/tools/dotc/Compiler.scala
+++ b/compiler/src/dotty/tools/dotc/Compiler.scala
@@ -3,12 +3,12 @@ package dotc
 
 import dotty.tools.backend
 
-import core._
-import Contexts._
+import core.*
+import Contexts.*
 import typer.{TyperPhase, RefChecks}
 import parsing.Parser
 import Phases.Phase
-import transform._
+import transform.*
 import backend.jvm.{CollectSuperCalls, GenBCode}
 import localopt.StringInterpolatorOpt
 
diff --git a/compiler/src/dotty/tools/dotc/Driver.scala b/compiler/src/dotty/tools/dotc/Driver.scala
index 0a56bf56a397..14da2803d02c 100644
--- a/compiler/src/dotty/tools/dotc/Driver.scala
+++ b/compiler/src/dotty/tools/dotc/Driver.scala
@@ -8,10 +8,10 @@ import scala.util.control.NonFatal
 
 import config.CompilerCommand
 import core.Comments.{ContextDoc, ContextDocstrings}
-import core.Contexts._
+import core.Contexts.*
 import core.{MacroClassLoader, TypeError}
-import reporting._
-import core.Decorators._
+import reporting.*
+import core.Decorators.*
 import config.Feature
 import fromtasty.{TASTYCompiler, TastyFileUtil}
 
diff --git a/compiler/src/dotty/tools/dotc/Resident.scala b/compiler/src/dotty/tools/dotc/Resident.scala
index 6cfc8505cbbc..5c47d381aced 100644
--- a/compiler/src/dotty/tools/dotc/Resident.scala
+++ b/compiler/src/dotty/tools/dotc/Resident.scala
@@ -4,7 +4,7 @@ package dotc
 import java.io.EOFException
 import scala.annotation.tailrec
 
-import core.Contexts._
+import core.Contexts.*
 import reporting.Reporter
 
 /** A compiler which stays resident between runs. This is more of a PoC than
diff --git a/compiler/src/dotty/tools/dotc/Run.scala b/compiler/src/dotty/tools/dotc/Run.scala
index 878edc4ae6cf..aa094435d5d4 100644
--- a/compiler/src/dotty/tools/dotc/Run.scala
+++ b/compiler/src/dotty/tools/dotc/Run.scala
@@ -11,20 +11,20 @@ import scala.compiletime.uninitialized
 import scala.io.Codec
 import scala.util.control.NonFatal
 
-import core._
-import Contexts._
-import Periods._
-import Symbols._
-import Scopes._
+import core.*
+import Contexts.*
+import Periods.*
+import Symbols.*
+import Scopes.*
 import Names.Name
 import Denotations.Denotation
 import typer.Typer
 import typer.ImportInfo.withRootImports
-import Decorators._
+import Decorators.*
 import io.AbstractFile
 import Phases.{unfusedPhases, Phase}
 import sbt.interfaces.ProgressCallback
-import util._
+import util.*
 import reporting.{Suppression, Action, Profile, ActiveProfile, NoProfile}
 import reporting.Diagnostic
 import reporting.Diagnostic.Warning
diff --git a/compiler/src/dotty/tools/dotc/ScalacCommand.scala b/compiler/src/dotty/tools/dotc/ScalacCommand.scala
index 2e0d9a08f25d..5f7f80a262d8 100644
--- a/compiler/src/dotty/tools/dotc/ScalacCommand.scala
+++ b/compiler/src/dotty/tools/dotc/ScalacCommand.scala
@@ -1,6 +1,6 @@
 package dotty.tools.dotc
 
-import config.Properties._
+import config.Properties.*
 import config.CompilerCommand
 
 object ScalacCommand extends CompilerCommand:
diff --git a/compiler/src/dotty/tools/dotc/ast/Desugar.scala b/compiler/src/dotty/tools/dotc/ast/Desugar.scala
index bed4e6764ad8..55e180fe5777 100644
--- a/compiler/src/dotty/tools/dotc/ast/Desugar.scala
+++ b/compiler/src/dotty/tools/dotc/ast/Desugar.scala
@@ -5,27 +5,27 @@ package ast
 import scala.annotation.internal.sharable
 import scala.annotation.threadUnsafe
 
-import core._
-import util.Spans._
-import Types._
-import Contexts._
-import Constants._
-import Names._
-import NameOps._
-import Flags._
-import Symbols._
-import StdNames._
-import Trees._
-import ContextOps._
-import Decorators._
+import core.*
+import util.Spans.*
+import Types.*
+import Contexts.*
+import Constants.*
+import Names.*
+import NameOps.*
+import Flags.*
+import Symbols.*
+import StdNames.*
+import Trees.*
+import ContextOps.*
+import Decorators.*
 import Annotations.Annotation
 import NameKinds.{UniqueName, ContextBoundParamName, ContextFunctionParamName, DefaultGetterName, WildcardParamName}
 import typer.{Namer, Checking}
 import util.{Property, SourceFile, SourcePosition, Chars}
 import config.Feature.{sourceVersion, migrateTo3, enabled}
-import config.SourceVersion._
+import config.SourceVersion.*
 import collection.mutable.ListBuffer
-import reporting._
+import reporting.*
 import annotation.constructorOnly
 import printing.Formatting.hl
 import config.Printers
diff --git a/compiler/src/dotty/tools/dotc/ast/DesugarEnums.scala b/compiler/src/dotty/tools/dotc/ast/DesugarEnums.scala
index a2aceea2c6ab..da3e5d0b4f87 100644
--- a/compiler/src/dotty/tools/dotc/ast/DesugarEnums.scala
+++ b/compiler/src/dotty/tools/dotc/ast/DesugarEnums.scala
@@ -4,19 +4,19 @@ package ast
 
 import scala.annotation.internal.sharable
 
-import core._
-import util.Spans._
-import Types._
-import Contexts._
-import Constants._
-import Names._
-import Flags._
-import Symbols._
-import StdNames._
-import Trees._
-import Decorators._
+import core.*
+import util.Spans.*
+import Types.*
+import Contexts.*
+import Constants.*
+import Names.*
+import Flags.*
+import Symbols.*
+import StdNames.*
+import Trees.*
+import Decorators.*
 import util.{Property, SourceFile}
-import typer.ErrorReporting._
+import typer.ErrorReporting.*
 import transform.SyntheticMembers.ExtendsSingletonMirror
 
 /** Helper methods to desugar enums */
diff --git a/compiler/src/dotty/tools/dotc/ast/MainProxies.scala b/compiler/src/dotty/tools/dotc/ast/MainProxies.scala
index e1733b4790ba..799b501c9581 100644
--- a/compiler/src/dotty/tools/dotc/ast/MainProxies.scala
+++ b/compiler/src/dotty/tools/dotc/ast/MainProxies.scala
@@ -1,16 +1,16 @@
 package dotty.tools.dotc
 package ast
 
-import core._
-import Symbols._
-import Types._
-import Contexts._
-import Decorators._
-import util.Spans._
-import Flags._
-import Constants._
+import core.*
+import Symbols.*
+import Types.*
+import Contexts.*
+import Decorators.*
+import util.Spans.*
+import Flags.*
+import Constants.*
 import StdNames.{nme, tpnme}
-import ast.Trees._
+import ast.Trees.*
 import Names.Name
 import Comments.Comment
 import NameKinds.DefaultGetterName
diff --git a/compiler/src/dotty/tools/dotc/ast/NavigateAST.scala b/compiler/src/dotty/tools/dotc/ast/NavigateAST.scala
index a7b4feb80c98..2034f0919f7c 100644
--- a/compiler/src/dotty/tools/dotc/ast/NavigateAST.scala
+++ b/compiler/src/dotty/tools/dotc/ast/NavigateAST.scala
@@ -5,9 +5,9 @@ import dotty.tools.dotc.core.Types.AnnotatedType
 import dotty.tools.dotc.core.Types.ImportType
 import dotty.tools.dotc.core.Types.Type
 
-import core.Contexts._
-import core.Decorators._
-import util.Spans._
+import core.Contexts.*
+import core.Decorators.*
+import util.Spans.*
 import Trees.{MemberDef, DefTree, WithLazyFields}
 
 /** Utility functions to go from typed to untyped ASTs */
diff --git a/compiler/src/dotty/tools/dotc/ast/Positioned.scala b/compiler/src/dotty/tools/dotc/ast/Positioned.scala
index 82c2d1bc7654..47d104e0acec 100644
--- a/compiler/src/dotty/tools/dotc/ast/Positioned.scala
+++ b/compiler/src/dotty/tools/dotc/ast/Positioned.scala
@@ -4,11 +4,11 @@ package ast
 
 import scala.compiletime.uninitialized
 
-import util.Spans._
+import util.Spans.*
 import util.{SourceFile, SourcePosition, SrcPos}
-import core.Contexts._
-import core.Decorators._
-import core.NameOps._
+import core.Contexts.*
+import core.Decorators.*
+import core.NameOps.*
 import core.Flags.{JavaDefined, ExtensionMethod}
 import core.StdNames.nme
 import ast.Trees.mods
diff --git a/compiler/src/dotty/tools/dotc/ast/TreeInfo.scala b/compiler/src/dotty/tools/dotc/ast/TreeInfo.scala
index 1045b39a2fce..4955c48be068 100644
--- a/compiler/src/dotty/tools/dotc/ast/TreeInfo.scala
+++ b/compiler/src/dotty/tools/dotc/ast/TreeInfo.scala
@@ -5,18 +5,18 @@ package ast
 import scala.annotation.tailrec
 import scala.collection.mutable
 
-import core._
-import Flags._
-import Trees._
-import Types._
-import Contexts._
-import Names._
-import StdNames._
-import NameOps._
-import Symbols._
+import core.*
+import Flags.*
+import Trees.*
+import Types.*
+import Contexts.*
+import Names.*
+import StdNames.*
+import NameOps.*
+import Symbols.*
 import typer.ConstFold
 import reporting.trace
-import Decorators._
+import Decorators.*
 import Constants.Constant
 
 trait TreeInfo[T <: Untyped] { self: Trees.Instance[T] =>
diff --git a/compiler/src/dotty/tools/dotc/ast/TreeMapWithImplicits.scala b/compiler/src/dotty/tools/dotc/ast/TreeMapWithImplicits.scala
index df14082c7adf..5603a422a77b 100644
--- a/compiler/src/dotty/tools/dotc/ast/TreeMapWithImplicits.scala
+++ b/compiler/src/dotty/tools/dotc/ast/TreeMapWithImplicits.scala
@@ -1,11 +1,11 @@
 package dotty.tools.dotc
 package ast
 
-import Trees._
-import core.Contexts._
+import Trees.*
+import core.Contexts.*
 import core.ContextOps.enter
-import core.Flags._
-import core.Symbols._
+import core.Flags.*
+import core.Symbols.*
 import core.TypeError
 
 /** A TreeMap that maintains the necessary infrastructure to support
diff --git a/compiler/src/dotty/tools/dotc/ast/TreeTypeMap.scala b/compiler/src/dotty/tools/dotc/ast/TreeTypeMap.scala
index 5588e6e6268b..fc6a15c6af97 100644
--- a/compiler/src/dotty/tools/dotc/ast/TreeTypeMap.scala
+++ b/compiler/src/dotty/tools/dotc/ast/TreeTypeMap.scala
@@ -2,16 +2,16 @@ package dotty.tools
 package dotc
 package ast
 
-import core._
-import Types._
-import Contexts._
-import Flags._
-import Symbols._
-import Annotations._
-import Trees._
-import Symbols._
+import core.*
+import Types.*
+import Contexts.*
+import Flags.*
+import Symbols.*
+import Annotations.*
+import Trees.*
+import Symbols.*
 import Constants.Constant
-import Decorators._
+import Decorators.*
 
 
 /** A map that applies three functions and a substitution together to a tree and
diff --git a/compiler/src/dotty/tools/dotc/ast/Trees.scala b/compiler/src/dotty/tools/dotc/ast/Trees.scala
index 421c27228d9a..59fd49bf0d31 100644
--- a/compiler/src/dotty/tools/dotc/ast/Trees.scala
+++ b/compiler/src/dotty/tools/dotc/ast/Trees.scala
@@ -2,20 +2,20 @@ package dotty.tools
 package dotc
 package ast
 
-import core._
-import Types._
-import Names._
-import NameOps._
-import Flags._
-import util.Spans._
-import Contexts._
-import Constants._
+import core.*
+import Types.*
+import Names.*
+import NameOps.*
+import Flags.*
+import util.Spans.*
+import Contexts.*
+import Constants.*
 import typer.{ ConstFold, ProtoTypes }
-import SymDenotations._
-import Symbols._
-import Denotations._
-import StdNames._
-import Comments._
+import SymDenotations.*
+import Symbols.*
+import Denotations.*
+import StdNames.*
+import Comments.*
 import collection.mutable.ListBuffer
 import printing.Printer
 import printing.Texts.Text
@@ -26,8 +26,8 @@ import annotation.internal.sharable
 import annotation.unchecked.uncheckedVariance
 import annotation.constructorOnly
 import compiletime.uninitialized
-import Decorators._
-import staging.StagingLevel._
+import Decorators.*
+import staging.StagingLevel.*
 
 object Trees {
 
diff --git a/compiler/src/dotty/tools/dotc/ast/tpd.scala b/compiler/src/dotty/tools/dotc/ast/tpd.scala
index 0bbe7bfac831..9e742dd7276b 100644
--- a/compiler/src/dotty/tools/dotc/ast/tpd.scala
+++ b/compiler/src/dotty/tools/dotc/ast/tpd.scala
@@ -10,22 +10,22 @@ import scala.collection.mutable.ListBuffer
 import scala.compiletime.uninitialized
 
 import typer.ProtoTypes
-import core._
+import core.*
 import Scopes.newScope
-import util.Spans._
-import Types._
-import Contexts._
-import Constants._
-import Names._
-import Flags._
-import NameOps._
-import Symbols._
-import StdNames._
-import Annotations._
-import Trees._
-import Symbols._
-import Decorators._
-import DenotTransformers._
+import util.Spans.*
+import Types.*
+import Contexts.*
+import Constants.*
+import Names.*
+import Flags.*
+import NameOps.*
+import Symbols.*
+import StdNames.*
+import Annotations.*
+import Trees.*
+import Symbols.*
+import Decorators.*
+import DenotTransformers.*
 import collection.{immutable, mutable}
 import util.{Property, SourceFile}
 import NameKinds.{TempResultName, OuterSelectName}
diff --git a/compiler/src/dotty/tools/dotc/ast/untpd.scala b/compiler/src/dotty/tools/dotc/ast/untpd.scala
index 51d6f61a6c3c..41b075729191 100644
--- a/compiler/src/dotty/tools/dotc/ast/untpd.scala
+++ b/compiler/src/dotty/tools/dotc/ast/untpd.scala
@@ -4,20 +4,20 @@ package ast
 
 import dotty.tools.dotc.typer.ProtoTypes
 
-import core._
-import Types._
-import Contexts._
-import Constants._
-import Names._
-import Flags._
-import Symbols._
-import StdNames._
-import Trees._
+import core.*
+import Types.*
+import Contexts.*
+import Constants.*
+import Names.*
+import Flags.*
+import Symbols.*
+import StdNames.*
+import Trees.*
 import util.{Property, SourceFile, NoSource}
 import util.Spans.Span
 import annotation.constructorOnly
 import annotation.internal.sharable
-import Decorators._
+import Decorators.*
 
 object untpd extends Trees.Instance[Untyped] with UntypedTreeInfo {
 
diff --git a/compiler/src/dotty/tools/dotc/cc/CaptureAnnotation.scala b/compiler/src/dotty/tools/dotc/cc/CaptureAnnotation.scala
index 2182e513a2d7..5cf1dab20400 100644
--- a/compiler/src/dotty/tools/dotc/cc/CaptureAnnotation.scala
+++ b/compiler/src/dotty/tools/dotc/cc/CaptureAnnotation.scala
@@ -2,14 +2,14 @@ package dotty.tools
 package dotc
 package cc
 
-import core._
-import Types._
-import Symbols._
-import Contexts._
-import Annotations._
-import ast.Trees._
+import core.*
+import Types.*
+import Symbols.*
+import Contexts.*
+import Annotations.*
+import ast.Trees.*
 import ast.{tpd, untpd}
-import Decorators._
+import Decorators.*
 import config.Printers.capt
 import printing.Printer
 import printing.Texts.Text
diff --git a/compiler/src/dotty/tools/dotc/cc/CaptureOps.scala b/compiler/src/dotty/tools/dotc/cc/CaptureOps.scala
index 83fe42bbb52a..fe4604f1bb47 100644
--- a/compiler/src/dotty/tools/dotc/cc/CaptureOps.scala
+++ b/compiler/src/dotty/tools/dotc/cc/CaptureOps.scala
@@ -2,20 +2,20 @@ package dotty.tools
 package dotc
 package cc
 
-import core._
-import Types._
-import Symbols._
-import Contexts._
-import Annotations._
-import Flags._
+import core.*
+import Types.*
+import Symbols.*
+import Contexts.*
+import Annotations.*
+import Flags.*
 import Names.TermName
 import ast.{tpd, untpd}
-import Decorators._
-import NameOps._
+import Decorators.*
+import NameOps.*
 import config.SourceVersion
 import config.Printers.capt
 import util.Property.Key
-import tpd._
+import tpd.*
 import StdNames.nme
 import config.Feature
 import collection.mutable
diff --git a/compiler/src/dotty/tools/dotc/cc/CaptureSet.scala b/compiler/src/dotty/tools/dotc/cc/CaptureSet.scala
index 1cab07a39736..2e491b97bc52 100644
--- a/compiler/src/dotty/tools/dotc/cc/CaptureSet.scala
+++ b/compiler/src/dotty/tools/dotc/cc/CaptureSet.scala
@@ -4,12 +4,12 @@ package cc
 
 import scala.collection.mutable
 
-import core._
-import Types._
-import Symbols._
-import Flags._
-import Contexts._
-import Decorators._
+import core.*
+import Types.*
+import Symbols.*
+import Flags.*
+import Contexts.*
+import Decorators.*
 import config.Printers.{capt, captDebug}
 import Annotations.Annotation
 import annotation.threadUnsafe
@@ -17,7 +17,7 @@ import annotation.constructorOnly
 import annotation.internal.sharable
 import reporting.trace
 import printing.{Showable, Printer}
-import printing.Texts._
+import printing.Texts.*
 import util.{SimpleIdentitySet, Property}
 import typer.ErrorReporting.Addenda
 import util.common.alwaysTrue
diff --git a/compiler/src/dotty/tools/dotc/cc/CapturingType.scala b/compiler/src/dotty/tools/dotc/cc/CapturingType.scala
index e73f04f76e6f..4220065d35d7 100644
--- a/compiler/src/dotty/tools/dotc/cc/CapturingType.scala
+++ b/compiler/src/dotty/tools/dotc/cc/CapturingType.scala
@@ -2,10 +2,10 @@ package dotty.tools
 package dotc
 package cc
 
-import core._
-import Types._
-import Symbols._
-import Contexts._
+import core.*
+import Types.*
+import Symbols.*
+import Contexts.*
 import Decorators.i
 
 /** A (possibly boxed) capturing type. This is internally represented as an annotated type with a @retains
diff --git a/compiler/src/dotty/tools/dotc/cc/CheckCaptures.scala b/compiler/src/dotty/tools/dotc/cc/CheckCaptures.scala
index 669c712bc78d..c7fe8dec420b 100644
--- a/compiler/src/dotty/tools/dotc/cc/CheckCaptures.scala
+++ b/compiler/src/dotty/tools/dotc/cc/CheckCaptures.scala
@@ -4,29 +4,29 @@ package cc
 
 import scala.collection.mutable
 
-import core._
-import Phases._
-import DenotTransformers._
-import SymDenotations._
-import Contexts._
-import Names._
-import Flags._
-import Symbols._
-import Decorators._
-import Types._
-import StdNames._
-import Denotations._
+import core.*
+import Phases.*
+import DenotTransformers.*
+import SymDenotations.*
+import Contexts.*
+import Names.*
+import Flags.*
+import Symbols.*
+import Decorators.*
+import Types.*
+import StdNames.*
+import Denotations.*
 import config.Printers.{capt, recheckr, noPrinter}
 import config.{Config, Feature}
 import ast.{tpd, untpd, Trees}
-import Trees._
+import Trees.*
 import typer.RefChecks.{checkAllOverrides, checkSelfAgainstParents, OverridingPairsChecker}
 import typer.Checking.{checkBounds, checkAppliedTypesIn}
 import typer.ErrorReporting.{Addenda, err}
 import typer.ProtoTypes.{AnySelectionProto, LhsProto}
 import util.{SimpleIdentitySet, EqHashMap, EqHashSet, SrcPos, Property}
 import transform.{Recheck, PreRecheck, CapturedVars}
-import Recheck._
+import Recheck.*
 import CaptureSet.{withCaptureSetsExplained, IdempotentCaptRefMap, CompareResult}
 import StdNames.nme
 import NameKinds.{DefaultGetterName, WildcardParamName}
diff --git a/compiler/src/dotty/tools/dotc/cc/RetainingType.scala b/compiler/src/dotty/tools/dotc/cc/RetainingType.scala
index fffc2cc5f47b..ab58d1f99975 100644
--- a/compiler/src/dotty/tools/dotc/cc/RetainingType.scala
+++ b/compiler/src/dotty/tools/dotc/cc/RetainingType.scala
@@ -2,11 +2,11 @@ package dotty.tools
 package dotc
 package cc
 
-import core._
-import Types._
-import Symbols._
-import Contexts._
-import ast.tpd._
+import core.*
+import Types.*
+import Symbols.*
+import Contexts.*
+import ast.tpd.*
 import Annotations.Annotation
 import Decorators.i
 
diff --git a/compiler/src/dotty/tools/dotc/cc/Setup.scala b/compiler/src/dotty/tools/dotc/cc/Setup.scala
index e3e2bd07c8ec..bf9ae29e0734 100644
--- a/compiler/src/dotty/tools/dotc/cc/Setup.scala
+++ b/compiler/src/dotty/tools/dotc/cc/Setup.scala
@@ -2,24 +2,24 @@ package dotty.tools
 package dotc
 package cc
 
-import core._
-import Phases._
-import DenotTransformers._
-import SymDenotations._
-import Contexts._
-import Names._
-import Flags._
-import Symbols._
-import Decorators._
-import Types._
-import StdNames._
+import core.*
+import Phases.*
+import DenotTransformers.*
+import SymDenotations.*
+import Contexts.*
+import Names.*
+import Flags.*
+import Symbols.*
+import Decorators.*
+import Types.*
+import StdNames.*
 import Annotations.Annotation
 import config.Feature
 import config.Printers.{capt, captDebug}
 import ast.tpd
-import tpd._
+import tpd.*
 import transform.{PreRecheck, Recheck}
-import Recheck._
+import Recheck.*
 import CaptureSet.{IdentityCaptRefMap, IdempotentCaptRefMap}
 import Synthetics.isExcluded
 import util.Property
diff --git a/compiler/src/dotty/tools/dotc/cc/Synthetics.scala b/compiler/src/dotty/tools/dotc/cc/Synthetics.scala
index 96d4eabb9bc7..c189e710315f 100644
--- a/compiler/src/dotty/tools/dotc/cc/Synthetics.scala
+++ b/compiler/src/dotty/tools/dotc/cc/Synthetics.scala
@@ -2,13 +2,13 @@ package dotty.tools
 package dotc
 package cc
 
-import core._
-import Symbols._
-import SymDenotations._
-import Contexts._
-import Flags._
-import Types._
-import Decorators._
+import core.*
+import Symbols.*
+import SymDenotations.*
+import Contexts.*
+import Flags.*
+import Types.*
+import Decorators.*
 import StdNames.nme
 import Names.Name
 import NameKinds.DefaultGetterName
diff --git a/compiler/src/dotty/tools/dotc/classpath/ClassPathFactory.scala b/compiler/src/dotty/tools/dotc/classpath/ClassPathFactory.scala
index e667c3be0953..9283043a9940 100644
--- a/compiler/src/dotty/tools/dotc/classpath/ClassPathFactory.scala
+++ b/compiler/src/dotty/tools/dotc/classpath/ClassPathFactory.scala
@@ -3,12 +3,12 @@
  */
 package dotty.tools.dotc.classpath
 
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.io.AbstractFile
 import dotty.tools.io.ClassPath
 import dotty.tools.io.VirtualDirectory
 
-import FileUtils._
+import FileUtils.*
 
 /**
  * Provides factory methods for classpath. When creating classpath instances for a given path,
diff --git a/compiler/src/dotty/tools/dotc/classpath/DirectoryClassPath.scala b/compiler/src/dotty/tools/dotc/classpath/DirectoryClassPath.scala
index f21a15fef46b..21d976d39cef 100644
--- a/compiler/src/dotty/tools/dotc/classpath/DirectoryClassPath.scala
+++ b/compiler/src/dotty/tools/dotc/classpath/DirectoryClassPath.scala
@@ -12,17 +12,17 @@ import dotty.tools.io.EfficientClassPath
 import dotty.tools.io.JDK9Reflectors
 import dotty.tools.io.PlainFile
 
-import java.io.{File => JFile}
+import java.io.File as JFile
 import java.net.URI
 import java.net.URL
 import java.nio.file.FileSystems
 import java.nio.file.Files
 import scala.collection.immutable.ArraySeq
-import scala.jdk.CollectionConverters._
+import scala.jdk.CollectionConverters.*
 import scala.language.unsafeNulls
 import scala.util.control.NonFatal
 
-import FileUtils._
+import FileUtils.*
 import PlainFile.toPlainFile
 
 /**
diff --git a/compiler/src/dotty/tools/dotc/classpath/FileUtils.scala b/compiler/src/dotty/tools/dotc/classpath/FileUtils.scala
index 093d2a402505..b403ee48ed09 100644
--- a/compiler/src/dotty/tools/dotc/classpath/FileUtils.scala
+++ b/compiler/src/dotty/tools/dotc/classpath/FileUtils.scala
@@ -6,8 +6,8 @@ package dotc.classpath
 
 import dotty.tools.io.AbstractFile
 
+import java.io.File as JFile
 import java.io.FileFilter
-import java.io.{File => JFile}
 import java.net.URL
 import scala.language.unsafeNulls
 
diff --git a/compiler/src/dotty/tools/dotc/classpath/VirtualDirectoryClassPath.scala b/compiler/src/dotty/tools/dotc/classpath/VirtualDirectoryClassPath.scala
index 718e6f876fcb..ddf9a3c8fe73 100644
--- a/compiler/src/dotty/tools/dotc/classpath/VirtualDirectoryClassPath.scala
+++ b/compiler/src/dotty/tools/dotc/classpath/VirtualDirectoryClassPath.scala
@@ -9,7 +9,7 @@ import java.net.URI
 import java.net.URL
 import scala.language.unsafeNulls
 
-import FileUtils._
+import FileUtils.*
 
 case class VirtualDirectoryClassPath(dir: VirtualDirectory) extends ClassPath with DirectoryLookup[ClassFileEntryImpl] with NoSourcePaths {
   type F = AbstractFile
diff --git a/compiler/src/dotty/tools/dotc/classpath/ZipAndJarFileLookupFactory.scala b/compiler/src/dotty/tools/dotc/classpath/ZipAndJarFileLookupFactory.scala
index cdea2edb1a50..3a4b607fb094 100644
--- a/compiler/src/dotty/tools/dotc/classpath/ZipAndJarFileLookupFactory.scala
+++ b/compiler/src/dotty/tools/dotc/classpath/ZipAndJarFileLookupFactory.scala
@@ -4,7 +4,7 @@
 package dotty.tools.dotc
 package classpath
 
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.io.AbstractFile
 import dotty.tools.io.ClassPath
 import dotty.tools.io.ClassRepresentation
@@ -19,7 +19,7 @@ import java.nio.file.attribute.FileTime
 import scala.annotation.tailrec
 import scala.language.unsafeNulls
 
-import FileUtils._
+import FileUtils.*
 
 /**
  * A trait providing an optional cache for classpath entries obtained from zip and jar files.
diff --git a/compiler/src/dotty/tools/dotc/classpath/ZipArchiveFileLookup.scala b/compiler/src/dotty/tools/dotc/classpath/ZipArchiveFileLookup.scala
index aad243fa2044..d9d97f72e8be 100644
--- a/compiler/src/dotty/tools/dotc/classpath/ZipArchiveFileLookup.scala
+++ b/compiler/src/dotty/tools/dotc/classpath/ZipArchiveFileLookup.scala
@@ -12,7 +12,7 @@ import java.io.File
 import java.net.URL
 import scala.language.unsafeNulls
 
-import FileUtils._
+import FileUtils.*
 
 /**
  * A trait allowing to look for classpath entries of given type in zip and jar files.
diff --git a/compiler/src/dotty/tools/dotc/config/CliCommand.scala b/compiler/src/dotty/tools/dotc/config/CliCommand.scala
index 37a290126f95..9dfc5d8cc69d 100644
--- a/compiler/src/dotty/tools/dotc/config/CliCommand.scala
+++ b/compiler/src/dotty/tools/dotc/config/CliCommand.scala
@@ -5,8 +5,8 @@ import scala.PartialFunction.cond
 import scala.language.unsafeNulls
 import scala.util.chaining.given
 
-import Settings._
-import core.Contexts._
+import Settings.*
+import core.Contexts.*
 import printing.Highlighting
 
 trait CliCommand:
diff --git a/compiler/src/dotty/tools/dotc/config/CommandLineParser.scala b/compiler/src/dotty/tools/dotc/config/CommandLineParser.scala
index 5a8aa6334879..13e27ee04601 100644
--- a/compiler/src/dotty/tools/dotc/config/CommandLineParser.scala
+++ b/compiler/src/dotty/tools/dotc/config/CommandLineParser.scala
@@ -5,7 +5,7 @@ import java.nio.file.Files
 import java.nio.file.Paths
 import scala.annotation.tailrec
 import scala.collection.mutable.ArrayBuffer
-import scala.jdk.CollectionConverters._
+import scala.jdk.CollectionConverters.*
 
 /** Split a line of text using shell conventions.
  */
diff --git a/compiler/src/dotty/tools/dotc/config/CompilerCommand.scala b/compiler/src/dotty/tools/dotc/config/CompilerCommand.scala
index 644896c30e3b..2ffe900fbdbf 100644
--- a/compiler/src/dotty/tools/dotc/config/CompilerCommand.scala
+++ b/compiler/src/dotty/tools/dotc/config/CompilerCommand.scala
@@ -1,8 +1,8 @@
 package dotty.tools.dotc
 package config
 
-import Settings._
-import core.Contexts._
+import Settings.*
+import core.Contexts.*
 
 abstract class CompilerCommand extends CliCommand:
   type ConcreteSettings = ScalaSettings
diff --git a/compiler/src/dotty/tools/dotc/config/Feature.scala b/compiler/src/dotty/tools/dotc/config/Feature.scala
index 8f2c74b8bf84..ffd68515720a 100644
--- a/compiler/src/dotty/tools/dotc/config/Feature.scala
+++ b/compiler/src/dotty/tools/dotc/config/Feature.scala
@@ -2,14 +2,14 @@ package dotty.tools
 package dotc
 package config
 
-import core._
-import Contexts._
-import Symbols._
-import Names._
+import core.*
+import Contexts.*
+import Symbols.*
+import Names.*
 import StdNames.nme
-import Decorators._
+import Decorators.*
 import util.{SrcPos, NoSourcePosition}
-import SourceVersion._
+import SourceVersion.*
 import reporting.Message
 import NameKinds.QualifiedName
 
diff --git a/compiler/src/dotty/tools/dotc/config/JavaPlatform.scala b/compiler/src/dotty/tools/dotc/config/JavaPlatform.scala
index 2ba42caa43e0..8603b16f1457 100644
--- a/compiler/src/dotty/tools/dotc/config/JavaPlatform.scala
+++ b/compiler/src/dotty/tools/dotc/config/JavaPlatform.scala
@@ -2,14 +2,14 @@ package dotty.tools
 package dotc
 package config
 
-import io._
+import io.*
 import classpath.AggregateClassPath
-import core._
-import Symbols._
-import Types._
-import Contexts._
-import StdNames._
-import Flags._
+import core.*
+import Symbols.*
+import Types.*
+import Contexts.*
+import StdNames.*
+import Flags.*
 import transform.ExplicitOuter
 
 class JavaPlatform extends Platform {
diff --git a/compiler/src/dotty/tools/dotc/config/MigrationVersion.scala b/compiler/src/dotty/tools/dotc/config/MigrationVersion.scala
index ffc8c232c5e7..4dd9d065395b 100644
--- a/compiler/src/dotty/tools/dotc/config/MigrationVersion.scala
+++ b/compiler/src/dotty/tools/dotc/config/MigrationVersion.scala
@@ -2,8 +2,8 @@ package dotty.tools
 package dotc
 package config
 
-import SourceVersion._
-import Feature._
+import SourceVersion.*
+import Feature.*
 import core.Contexts.Context
 
 class MigrationVersion(
diff --git a/compiler/src/dotty/tools/dotc/config/OutputDirs.scala b/compiler/src/dotty/tools/dotc/config/OutputDirs.scala
index 0411c5604768..ba121d06e35a 100644
--- a/compiler/src/dotty/tools/dotc/config/OutputDirs.scala
+++ b/compiler/src/dotty/tools/dotc/config/OutputDirs.scala
@@ -4,7 +4,7 @@ package config
 
 import scala.language.unsafeNulls
 
-import io._
+import io.*
 
 /** A class for holding mappings from source directories to
  *  their output location. This functionality can be accessed
diff --git a/compiler/src/dotty/tools/dotc/config/PathResolver.scala b/compiler/src/dotty/tools/dotc/config/PathResolver.scala
index 67cf251690b8..4fb120d2fd92 100644
--- a/compiler/src/dotty/tools/dotc/config/PathResolver.scala
+++ b/compiler/src/dotty/tools/dotc/config/PathResolver.scala
@@ -11,8 +11,8 @@ import io.{ClassPath, Directory, Path}
 import classpath.{AggregateClassPath, ClassPathFactory, JrtClassPath}
 import ClassPath.split
 import PartialFunction.condOpt
-import core.Contexts._
-import Settings._
+import core.Contexts.*
+import Settings.*
 
 object PathResolver {
 
diff --git a/compiler/src/dotty/tools/dotc/config/Platform.scala b/compiler/src/dotty/tools/dotc/config/Platform.scala
index 71414263f225..a80ed11ad010 100644
--- a/compiler/src/dotty/tools/dotc/config/Platform.scala
+++ b/compiler/src/dotty/tools/dotc/config/Platform.scala
@@ -3,8 +3,8 @@ package dotc
 package config
 
 import io.{ClassPath, AbstractFile}
-import core.Contexts._
-import core.Symbols._
+import core.Contexts.*
+import core.Symbols.*
 import core.SymbolLoader
 import core.StdNames.nme
 import core.Flags.Module
diff --git a/compiler/src/dotty/tools/dotc/config/Properties.scala b/compiler/src/dotty/tools/dotc/config/Properties.scala
index 58259f1beea0..39e6bfa3ff13 100644
--- a/compiler/src/dotty/tools/dotc/config/Properties.scala
+++ b/compiler/src/dotty/tools/dotc/config/Properties.scala
@@ -4,7 +4,7 @@ package config
 
 import java.io.IOException
 import java.nio.charset.StandardCharsets
-import java.util.jar.Attributes.{ Name => AttributeName }
+import java.util.jar.Attributes.Name as AttributeName
 import scala.annotation.internal.sharable
 import scala.language.unsafeNulls
 
diff --git a/compiler/src/dotty/tools/dotc/config/SJSPlatform.scala b/compiler/src/dotty/tools/dotc/config/SJSPlatform.scala
index 3fc882c73b6e..6d856961a9a3 100644
--- a/compiler/src/dotty/tools/dotc/config/SJSPlatform.scala
+++ b/compiler/src/dotty/tools/dotc/config/SJSPlatform.scala
@@ -1,10 +1,10 @@
 package dotty.tools.dotc.config
 
 import dotty.tools.backend.sjs.JSDefinitions
-import dotty.tools.dotc.core._
+import dotty.tools.dotc.core.*
 
-import Contexts._
-import Symbols._
+import Contexts.*
+import Symbols.*
 
 object SJSPlatform {
   /** The `SJSPlatform` for the current context. */
diff --git a/compiler/src/dotty/tools/dotc/config/ScalaSettings.scala b/compiler/src/dotty/tools/dotc/config/ScalaSettings.scala
index 6fc643022afa..3ffbd73f0465 100644
--- a/compiler/src/dotty/tools/dotc/config/ScalaSettings.scala
+++ b/compiler/src/dotty/tools/dotc/config/ScalaSettings.scala
@@ -5,7 +5,7 @@ import dotty.tools.dotc.config.PathResolver.Defaults
 import dotty.tools.dotc.config.Settings.Setting
 import dotty.tools.dotc.config.Settings.SettingGroup
 import dotty.tools.dotc.config.SourceVersion
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.rewrites.Rewrites
 import dotty.tools.io.AbstractFile
 import dotty.tools.io.Directory
@@ -15,7 +15,7 @@ import dotty.tools.io.PlainDirectory
 
 import java.util.zip.Deflater
 import scala.language.unsafeNulls
-import scala.util.chaining._
+import scala.util.chaining.*
 
 import Setting.ChoiceWithHelp
 
diff --git a/compiler/src/dotty/tools/dotc/config/Settings.scala b/compiler/src/dotty/tools/dotc/config/Settings.scala
index 06935b8282e7..97fb756f7966 100644
--- a/compiler/src/dotty/tools/dotc/config/Settings.scala
+++ b/compiler/src/dotty/tools/dotc/config/Settings.scala
@@ -11,7 +11,7 @@ import scala.language.unsafeNulls
 import scala.util.Failure
 import scala.util.Success
 
-import core.Contexts._
+import core.Contexts.*
 import annotation.tailrec
 import collection.mutable.ArrayBuffer
 import reflect.ClassTag
diff --git a/compiler/src/dotty/tools/dotc/config/SourceVersion.scala b/compiler/src/dotty/tools/dotc/config/SourceVersion.scala
index b58e804b1fbc..7a464d331930 100644
--- a/compiler/src/dotty/tools/dotc/config/SourceVersion.scala
+++ b/compiler/src/dotty/tools/dotc/config/SourceVersion.scala
@@ -2,7 +2,7 @@ package dotty.tools
 package dotc
 package config
 
-import core.Decorators._
+import core.Decorators.*
 import util.Property
 
 enum SourceVersion:
diff --git a/compiler/src/dotty/tools/dotc/core/Annotations.scala b/compiler/src/dotty/tools/dotc/core/Annotations.scala
index 3665068c57cd..70c442bf9358 100644
--- a/compiler/src/dotty/tools/dotc/core/Annotations.scala
+++ b/compiler/src/dotty/tools/dotc/core/Annotations.scala
@@ -4,13 +4,13 @@ package core
 
 import scala.annotation.internal.sharable
 
-import Symbols._
-import Types._
-import Contexts._
-import Constants._
-import Phases._
+import Symbols.*
+import Types.*
+import Contexts.*
+import Constants.*
+import Phases.*
 import ast.tpd
-import tpd._
+import tpd.*
 import util.Spans.Span
 import printing.{Showable, Printer}
 import printing.Texts.Text
diff --git a/compiler/src/dotty/tools/dotc/core/Atoms.scala b/compiler/src/dotty/tools/dotc/core/Atoms.scala
index bcaaf6794107..a68a07947965 100644
--- a/compiler/src/dotty/tools/dotc/core/Atoms.scala
+++ b/compiler/src/dotty/tools/dotc/core/Atoms.scala
@@ -2,7 +2,7 @@ package dotty.tools
 package dotc
 package core
 
-import Types._
+import Types.*
 
 /** Indicates the singleton types that a type must or may consist of.
  *  @param lo   The lower bound: singleton types in this set are guaranteed
diff --git a/compiler/src/dotty/tools/dotc/core/CheckRealizable.scala b/compiler/src/dotty/tools/dotc/core/CheckRealizable.scala
index 7302071f52e5..7cf912441def 100644
--- a/compiler/src/dotty/tools/dotc/core/CheckRealizable.scala
+++ b/compiler/src/dotty/tools/dotc/core/CheckRealizable.scala
@@ -2,13 +2,13 @@ package dotty.tools
 package dotc
 package core
 
-import Contexts._
-import Types._
-import Symbols._
-import Names._
-import Flags._
+import Contexts.*
+import Types.*
+import Symbols.*
+import Names.*
+import Flags.*
 import Denotations.SingleDenotation
-import Decorators._
+import Decorators.*
 import collection.mutable
 import config.SourceVersion.future
 import config.Feature.sourceVersion
diff --git a/compiler/src/dotty/tools/dotc/core/Comments.scala b/compiler/src/dotty/tools/dotc/core/Comments.scala
index af0a36331326..fd3009574f6b 100644
--- a/compiler/src/dotty/tools/dotc/core/Comments.scala
+++ b/compiler/src/dotty/tools/dotc/core/Comments.scala
@@ -5,11 +5,11 @@ package core
 import scala.language.unsafeNulls
 
 import ast.{ untpd, tpd }
-import Symbols._
-import Contexts._
+import Symbols.*
+import Contexts.*
 import util.{SourceFile, ReadOnlyMap}
-import util.Spans._
-import util.CommentParsing._
+import util.Spans.*
+import util.CommentParsing.*
 import util.Property.Key
 import parsing.Parsers.Parser
 import reporting.ProperDefinitionNotFound
diff --git a/compiler/src/dotty/tools/dotc/core/Constants.scala b/compiler/src/dotty/tools/dotc/core/Constants.scala
index 76367f880995..313272a684bd 100644
--- a/compiler/src/dotty/tools/dotc/core/Constants.scala
+++ b/compiler/src/dotty/tools/dotc/core/Constants.scala
@@ -2,9 +2,9 @@ package dotty.tools
 package dotc
 package core
 
-import Types._
-import Symbols._
-import Contexts._
+import Types.*
+import Symbols.*
+import Contexts.*
 import printing.Printer
 import printing.Texts.Text
 
diff --git a/compiler/src/dotty/tools/dotc/core/Constraint.scala b/compiler/src/dotty/tools/dotc/core/Constraint.scala
index d1efa2590620..5fa98ee873ba 100644
--- a/compiler/src/dotty/tools/dotc/core/Constraint.scala
+++ b/compiler/src/dotty/tools/dotc/core/Constraint.scala
@@ -2,8 +2,8 @@ package dotty.tools
 package dotc
 package core
 
-import Types._
-import Contexts._
+import Types.*
+import Contexts.*
 import printing.Showable
 import util.{SimpleIdentitySet, SimpleIdentityMap}
 
diff --git a/compiler/src/dotty/tools/dotc/core/ConstraintHandling.scala b/compiler/src/dotty/tools/dotc/core/ConstraintHandling.scala
index 15902eea4579..da94226b34af 100644
--- a/compiler/src/dotty/tools/dotc/core/ConstraintHandling.scala
+++ b/compiler/src/dotty/tools/dotc/core/ConstraintHandling.scala
@@ -2,15 +2,15 @@ package dotty.tools
 package dotc
 package core
 
-import Types._
-import Contexts._
-import Symbols._
-import Decorators._
-import Flags._
+import Types.*
+import Contexts.*
+import Symbols.*
+import Decorators.*
+import Flags.*
 import config.Config
 import config.Printers.typr
 import typer.ProtoTypes.{newTypeVar, representedParamRef}
-import UnificationDirection._
+import UnificationDirection.*
 import NameKinds.AvoidNameKind
 import util.SimpleIdentitySet
 import NullOpsDecorator.stripNull
diff --git a/compiler/src/dotty/tools/dotc/core/ConstraintRunInfo.scala b/compiler/src/dotty/tools/dotc/core/ConstraintRunInfo.scala
index b7053446f2a0..92782f9cd225 100644
--- a/compiler/src/dotty/tools/dotc/core/ConstraintRunInfo.scala
+++ b/compiler/src/dotty/tools/dotc/core/ConstraintRunInfo.scala
@@ -3,7 +3,7 @@ package core
 
 import scala.compiletime.uninitialized
 
-import Contexts._
+import Contexts.*
 import config.Printers.{default, typr}
 
 trait ConstraintRunInfo { self: Run =>
diff --git a/compiler/src/dotty/tools/dotc/core/ContextOps.scala b/compiler/src/dotty/tools/dotc/core/ContextOps.scala
index 921dc4ffcd7b..dd1662a511ca 100644
--- a/compiler/src/dotty/tools/dotc/core/ContextOps.scala
+++ b/compiler/src/dotty/tools/dotc/core/ContextOps.scala
@@ -1,12 +1,12 @@
 package dotty.tools.dotc
 package core
 
-import Contexts._
-import Symbols._
-import Types._
-import Flags._
-import Denotations._
-import SymDenotations._
+import Contexts.*
+import Symbols.*
+import Types.*
+import Flags.*
+import Denotations.*
+import SymDenotations.*
 import Names.Name
 import StdNames.nme
 import ast.untpd
diff --git a/compiler/src/dotty/tools/dotc/core/Contexts.scala b/compiler/src/dotty/tools/dotc/core/Contexts.scala
index 1a63d4459681..a9fbd94010a6 100644
--- a/compiler/src/dotty/tools/dotc/core/Contexts.scala
+++ b/compiler/src/dotty/tools/dotc/core/Contexts.scala
@@ -12,27 +12,27 @@ import scala.annotation.internal.sharable
 import scala.io.Codec
 
 import interfaces.CompilerCallback
-import Decorators._
-import Periods._
-import Names._
-import Phases._
-import Types._
-import Symbols._
-import Scopes._
-import Uniques._
-import ast.Trees._
+import Decorators.*
+import Periods.*
+import Names.*
+import Phases.*
+import Types.*
+import Symbols.*
+import Scopes.*
+import Uniques.*
+import ast.Trees.*
 import ast.untpd
 import util.{NoSource, SimpleIdentityMap, SourceFile, HashSet, ReusableInstance}
 import typer.{Implicits, ImportInfo, SearchHistory, SearchRoot, TypeAssigner, Typer, Nullables}
 import inlines.Inliner
-import Nullables._
+import Nullables.*
 import Implicits.ContextualImplicits
-import config.Settings._
+import config.Settings.*
 import config.Config
-import reporting._
+import reporting.*
 import io.{AbstractFile, NoAbstractFile, PlainFile, Path}
 import collection.mutable
-import printing._
+import printing.*
 import config.{JavaPlatform, SJSPlatform, Platform, ScalaSettings}
 import classfile.ReusableDataReader
 import StdNames.nme
@@ -40,7 +40,7 @@ import compiletime.uninitialized
 import DenotTransformers.DenotTransformer
 import util.Property.Key
 import util.Store
-import plugins._
+import plugins.*
 
 object Contexts {
 
diff --git a/compiler/src/dotty/tools/dotc/core/Decorators.scala b/compiler/src/dotty/tools/dotc/core/Decorators.scala
index a2e870a65ef6..82896dacec3f 100644
--- a/compiler/src/dotty/tools/dotc/core/Decorators.scala
+++ b/compiler/src/dotty/tools/dotc/core/Decorators.scala
@@ -6,13 +6,13 @@ import scala.annotation.tailrec
 import scala.collection.mutable.ListBuffer
 import scala.util.control.NonFatal
 
-import Contexts._
-import Names._
-import Phases._
-import Symbols._
+import Contexts.*
+import Names.*
+import Phases.*
+import Symbols.*
 import printing.{ Printer, Showable }
-import printing.Formatting._
-import printing.Texts._
+import printing.Formatting.*
+import printing.Texts.*
 import transform.MegaPhase
 import reporting.{Message, NoExplanation}
 
diff --git a/compiler/src/dotty/tools/dotc/core/Definitions.scala b/compiler/src/dotty/tools/dotc/core/Definitions.scala
index 40673c66a5a8..cdcb22e39927 100644
--- a/compiler/src/dotty/tools/dotc/core/Definitions.scala
+++ b/compiler/src/dotty/tools/dotc/core/Definitions.scala
@@ -3,23 +3,23 @@ package dotc
 package core
 
 import scala.annotation.tailrec
-import scala.annotation.{threadUnsafe => tu}
+import scala.annotation.threadUnsafe as tu
 import scala.collection.mutable
 import scala.compiletime.uninitialized
 
-import Types._
-import Contexts._
-import Symbols._
-import SymDenotations._
-import StdNames._
-import Names._
-import Phases._
-import Flags._
-import Scopes._
-import Decorators._
-import NameOps._
-import Periods._
-import NullOpsDecorator._
+import Types.*
+import Contexts.*
+import Symbols.*
+import SymDenotations.*
+import StdNames.*
+import Names.*
+import Phases.*
+import Flags.*
+import Scopes.*
+import Decorators.*
+import NameOps.*
+import Periods.*
+import NullOpsDecorator.*
 import unpickleScala2.Scala2Unpickler.ensureConstructor
 import collection.mutable
 import Denotations.{SingleDenotation, staticRef}
diff --git a/compiler/src/dotty/tools/dotc/core/DenotTransformers.scala b/compiler/src/dotty/tools/dotc/core/DenotTransformers.scala
index 6690cae3a142..59982fb99b5f 100644
--- a/compiler/src/dotty/tools/dotc/core/DenotTransformers.scala
+++ b/compiler/src/dotty/tools/dotc/core/DenotTransformers.scala
@@ -1,13 +1,13 @@
 package dotty.tools.dotc
 package core
 
-import Periods._
-import SymDenotations._
-import Contexts._
-import Types._
-import Symbols._
-import Denotations._
-import Phases._
+import Periods.*
+import SymDenotations.*
+import Contexts.*
+import Types.*
+import Symbols.*
+import Denotations.*
+import Phases.*
 
 object DenotTransformers {
 
diff --git a/compiler/src/dotty/tools/dotc/core/Denotations.scala b/compiler/src/dotty/tools/dotc/core/Denotations.scala
index e5166b749e83..28c58e1bd6cd 100644
--- a/compiler/src/dotty/tools/dotc/core/Denotations.scala
+++ b/compiler/src/dotty/tools/dotc/core/Denotations.scala
@@ -5,24 +5,24 @@ package core
 import scala.compiletime.uninitialized
 
 import SymDenotations.{ SymDenotation, ClassDenotation, NoDenotation, LazyType, stillValid, acceptStale, traceInvalid }
-import Contexts._
-import Names._
-import NameKinds._
-import StdNames._
+import Contexts.*
+import Names.*
+import NameKinds.*
+import StdNames.*
 import Symbols.NoSymbol
-import Symbols._
-import Types._
-import Periods._
-import Flags._
-import DenotTransformers._
-import Decorators._
-import Signature.MatchDegree._
-import printing.Texts._
+import Symbols.*
+import Types.*
+import Periods.*
+import Flags.*
+import DenotTransformers.*
+import Decorators.*
+import Signature.MatchDegree.*
+import printing.Texts.*
 import printing.Printer
 import io.AbstractFile
 import config.Config
 import config.Printers.overload
-import util.common._
+import util.common.*
 import typer.ProtoTypes.NoViewsAllowed
 import collection.mutable.ListBuffer
 
diff --git a/compiler/src/dotty/tools/dotc/core/GadtConstraint.scala b/compiler/src/dotty/tools/dotc/core/GadtConstraint.scala
index 3906c4a7c36a..9c32058ae816 100644
--- a/compiler/src/dotty/tools/dotc/core/GadtConstraint.scala
+++ b/compiler/src/dotty/tools/dotc/core/GadtConstraint.scala
@@ -6,14 +6,14 @@ import scala.annotation.internal.sharable
 import scala.annotation.tailrec
 import scala.collection.mutable
 
-import Contexts._
-import Decorators._
-import Symbols._
-import Types._
+import Contexts.*
+import Decorators.*
+import Symbols.*
+import Types.*
 import NameKinds.UniqueName
 import config.Printers.{gadts, gadtsConstr}
 import util.{SimpleIdentitySet, SimpleIdentityMap}
-import printing._
+import printing.*
 
 object GadtConstraint:
   @sharable val empty: GadtConstraint =
diff --git a/compiler/src/dotty/tools/dotc/core/Hashable.scala b/compiler/src/dotty/tools/dotc/core/Hashable.scala
index 247e9f01edc2..1db399735e80 100644
--- a/compiler/src/dotty/tools/dotc/core/Hashable.scala
+++ b/compiler/src/dotty/tools/dotc/core/Hashable.scala
@@ -1,9 +1,9 @@
 package dotty.tools.dotc
 package core
 
-import scala.util.hashing.{ MurmurHash3 => hashing }
+import scala.util.hashing.MurmurHash3 as hashing
 
-import Types._
+import Types.*
 import annotation.tailrec
 
 object Hashable {
diff --git a/compiler/src/dotty/tools/dotc/core/JavaNullInterop.scala b/compiler/src/dotty/tools/dotc/core/JavaNullInterop.scala
index 60fc4a4274e0..6244923cfb52 100644
--- a/compiler/src/dotty/tools/dotc/core/JavaNullInterop.scala
+++ b/compiler/src/dotty/tools/dotc/core/JavaNullInterop.scala
@@ -1,11 +1,11 @@
 package dotty.tools.dotc
 package core
 
-import Contexts._
+import Contexts.*
 import Flags.JavaDefined
 import StdNames.nme
-import Symbols._
-import Types._
+import Symbols.*
+import Types.*
 
 /** This module defines methods to interpret types of Java symbols, which are implicitly nullable in Java,
  *  as Scala types, which are explicitly nullable.
diff --git a/compiler/src/dotty/tools/dotc/core/MacroClassLoader.scala b/compiler/src/dotty/tools/dotc/core/MacroClassLoader.scala
index e9661c657754..1fb4676df12b 100644
--- a/compiler/src/dotty/tools/dotc/core/MacroClassLoader.scala
+++ b/compiler/src/dotty/tools/dotc/core/MacroClassLoader.scala
@@ -1,6 +1,6 @@
 package dotty.tools.dotc.core
 
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.reporting.trace
 import dotty.tools.dotc.util.Property
 import dotty.tools.io.ClassPath
diff --git a/compiler/src/dotty/tools/dotc/core/MatchTypeTrace.scala b/compiler/src/dotty/tools/dotc/core/MatchTypeTrace.scala
index 9f0259cc5800..b5b689f42622 100644
--- a/compiler/src/dotty/tools/dotc/core/MatchTypeTrace.scala
+++ b/compiler/src/dotty/tools/dotc/core/MatchTypeTrace.scala
@@ -2,10 +2,10 @@ package dotty.tools
 package dotc
 package core
 
-import Types._
-import Contexts._
-import Symbols._
-import Decorators._
+import Types.*
+import Contexts.*
+import Symbols.*
+import Decorators.*
 import util.Property
 import Names.Name
 
diff --git a/compiler/src/dotty/tools/dotc/core/NameKinds.scala b/compiler/src/dotty/tools/dotc/core/NameKinds.scala
index 79b6f7bc0c02..bae15eb8e230 100644
--- a/compiler/src/dotty/tools/dotc/core/NameKinds.scala
+++ b/compiler/src/dotty/tools/dotc/core/NameKinds.scala
@@ -4,12 +4,12 @@ package core
 
 import scala.annotation.internal.sharable
 
-import Names._
-import NameOps._
-import StdNames._
-import NameTags._
-import Contexts._
-import Decorators._
+import Names.*
+import NameOps.*
+import StdNames.*
+import NameTags.*
+import Contexts.*
+import Decorators.*
 
 /** Defines possible kinds of NameInfo of a derived name */
 object NameKinds {
diff --git a/compiler/src/dotty/tools/dotc/core/NameOps.scala b/compiler/src/dotty/tools/dotc/core/NameOps.scala
index 093f7fc7f560..dd019dae3332 100644
--- a/compiler/src/dotty/tools/dotc/core/NameOps.scala
+++ b/compiler/src/dotty/tools/dotc/core/NameOps.scala
@@ -7,17 +7,17 @@ import java.security.MessageDigest
 import scala.io.Codec
 
 import Int.MaxValue
-import Names._
-import StdNames._
-import Contexts._
-import Symbols._
-import Flags._
-import NameKinds._
-import Types._
+import Names.*
+import StdNames.*
+import Contexts.*
+import Symbols.*
+import Flags.*
+import NameKinds.*
+import Types.*
 import util.Chars.{isOperatorPart, digit2int}
-import Decorators._
-import Definitions._
-import nme._
+import Decorators.*
+import Definitions.*
+import nme.*
 
 object NameOps {
 
diff --git a/compiler/src/dotty/tools/dotc/core/NamerOps.scala b/compiler/src/dotty/tools/dotc/core/NamerOps.scala
index ab7613fff6c5..109a225cdfed 100644
--- a/compiler/src/dotty/tools/dotc/core/NamerOps.scala
+++ b/compiler/src/dotty/tools/dotc/core/NamerOps.scala
@@ -2,14 +2,14 @@ package dotty.tools
 package dotc
 package core
 
-import Contexts._
-import Symbols._
-import Types._
-import Flags._
-import Scopes._
-import Decorators._
-import Names._
-import NameOps._
+import Contexts.*
+import Symbols.*
+import Types.*
+import Flags.*
+import Scopes.*
+import Decorators.*
+import Names.*
+import NameOps.*
 import SymDenotations.{LazyType, SymDenotation}
 import StdNames.nme
 import TypeApplications.EtaExpansion
diff --git a/compiler/src/dotty/tools/dotc/core/NullOpsDecorator.scala b/compiler/src/dotty/tools/dotc/core/NullOpsDecorator.scala
index 769d32dd0151..4f22f9d31e36 100644
--- a/compiler/src/dotty/tools/dotc/core/NullOpsDecorator.scala
+++ b/compiler/src/dotty/tools/dotc/core/NullOpsDecorator.scala
@@ -1,8 +1,8 @@
 package dotty.tools.dotc
 package core
 
-import Contexts._
-import Types._
+import Contexts.*
+import Types.*
 
 /** Defines operations on nullable types and tree. */
 object NullOpsDecorator:
diff --git a/compiler/src/dotty/tools/dotc/core/OrderingConstraint.scala b/compiler/src/dotty/tools/dotc/core/OrderingConstraint.scala
index ca10332d7db3..a4a5a195d3dd 100644
--- a/compiler/src/dotty/tools/dotc/core/OrderingConstraint.scala
+++ b/compiler/src/dotty/tools/dotc/core/OrderingConstraint.scala
@@ -4,15 +4,15 @@ package core
 
 import scala.compiletime.uninitialized
 
-import Types._
-import Contexts._
-import Symbols._
-import Decorators._
-import TypeApplications._
+import Types.*
+import Contexts.*
+import Symbols.*
+import Decorators.*
+import TypeApplications.*
 import util.{SimpleIdentitySet, SimpleIdentityMap}
 import collection.mutable
 import printing.Printer
-import printing.Texts._
+import printing.Texts.*
 import config.Config
 import config.Printers.constr
 import reflect.ClassTag
diff --git a/compiler/src/dotty/tools/dotc/core/ParamInfo.scala b/compiler/src/dotty/tools/dotc/core/ParamInfo.scala
index e88d6540e64b..e499f718365a 100644
--- a/compiler/src/dotty/tools/dotc/core/ParamInfo.scala
+++ b/compiler/src/dotty/tools/dotc/core/ParamInfo.scala
@@ -1,7 +1,7 @@
 package dotty.tools.dotc.core
 
 import Names.Name
-import Contexts._
+import Contexts.*
 import Types.Type
 import Variances.{Variance, varianceToInt}
 
diff --git a/compiler/src/dotty/tools/dotc/core/PatternTypeConstrainer.scala b/compiler/src/dotty/tools/dotc/core/PatternTypeConstrainer.scala
index b0dd15c8f2b7..685c374bcbab 100644
--- a/compiler/src/dotty/tools/dotc/core/PatternTypeConstrainer.scala
+++ b/compiler/src/dotty/tools/dotc/core/PatternTypeConstrainer.scala
@@ -4,13 +4,13 @@ package core
 
 import dotty.tools.dotc.reporting.trace
 
-import Decorators._
-import Symbols._
-import Types._
-import Flags._
+import Decorators.*
+import Symbols.*
+import Types.*
+import Flags.*
 import Contexts.ctx
 import config.Feature.migrateTo3
-import config.Printers._
+import config.Printers.*
 
 trait PatternTypeConstrainer { self: TypeComparer =>
 
diff --git a/compiler/src/dotty/tools/dotc/core/Periods.scala b/compiler/src/dotty/tools/dotc/core/Periods.scala
index ee877fb538d4..019c5932b3c9 100644
--- a/compiler/src/dotty/tools/dotc/core/Periods.scala
+++ b/compiler/src/dotty/tools/dotc/core/Periods.scala
@@ -1,6 +1,6 @@
 package dotty.tools.dotc.core
 
-import Contexts._
+import Contexts.*
 import Phases.unfusedPhases
 
 object Periods {
diff --git a/compiler/src/dotty/tools/dotc/core/Phases.scala b/compiler/src/dotty/tools/dotc/core/Phases.scala
index 4957b292552e..d92cf9c8657b 100644
--- a/compiler/src/dotty/tools/dotc/core/Phases.scala
+++ b/compiler/src/dotty/tools/dotc/core/Phases.scala
@@ -3,21 +3,21 @@ package dotc
 package core
 
 import dotty.tools.backend.jvm.GenBCode
-import dotty.tools.dotc.transform.MegaPhase._
-import dotty.tools.dotc.transform._
+import dotty.tools.dotc.transform.*
+import dotty.tools.dotc.transform.MegaPhase.*
 
 import scala.annotation.internal.sharable
 import scala.collection.mutable.ListBuffer
 import scala.compiletime.uninitialized
 import scala.util.control.NonFatal
 
-import Periods._
-import Contexts._
-import DenotTransformers._
-import Denotations._
-import Decorators._
+import Periods.*
+import Contexts.*
+import DenotTransformers.*
+import Denotations.*
+import Decorators.*
 import config.Printers.config
-import Periods._
+import Periods.*
 import parsing.Parser
 import printing.XprintMode
 import typer.{TyperPhase, RefChecks}
diff --git a/compiler/src/dotty/tools/dotc/core/Scopes.scala b/compiler/src/dotty/tools/dotc/core/Scopes.scala
index e6df7d051c41..7f0557cb2f0e 100644
--- a/compiler/src/dotty/tools/dotc/core/Scopes.scala
+++ b/compiler/src/dotty/tools/dotc/core/Scopes.scala
@@ -9,14 +9,14 @@ package core
 
 import scala.compiletime.uninitialized
 
-import Symbols._
+import Symbols.*
 import Types.{TermRef, NoPrefix}
-import Flags._
-import Names._
-import Contexts._
-import Phases._
-import Denotations._
-import printing.Texts._
+import Flags.*
+import Names.*
+import Contexts.*
+import Phases.*
+import Denotations.*
+import printing.Texts.*
 import printing.Printer
 import SymDenotations.NoDenotation
 import collection.mutable
diff --git a/compiler/src/dotty/tools/dotc/core/Signature.scala b/compiler/src/dotty/tools/dotc/core/Signature.scala
index c69805e7c28f..920be5d7e29a 100644
--- a/compiler/src/dotty/tools/dotc/core/Signature.scala
+++ b/compiler/src/dotty/tools/dotc/core/Signature.scala
@@ -3,13 +3,13 @@ package core
 
 import scala.annotation.tailrec
 
-import Names._
-import Types._
-import Contexts._
-import StdNames._
-import Decorators._
+import Names.*
+import Types.*
+import Contexts.*
+import StdNames.*
+import Decorators.*
 import TypeErasure.sigName
-import Signature._
+import Signature.*
 
 /** The signature of a denotation.
  *
diff --git a/compiler/src/dotty/tools/dotc/core/StdNames.scala b/compiler/src/dotty/tools/dotc/core/StdNames.scala
index e43323745ab5..5ce432b30663 100644
--- a/compiler/src/dotty/tools/dotc/core/StdNames.scala
+++ b/compiler/src/dotty/tools/dotc/core/StdNames.scala
@@ -5,9 +5,9 @@ import scala.annotation.internal.sharable
 import scala.annotation.switch
 import scala.collection.mutable
 
-import Names._
-import Symbols._
-import Contexts._
+import Names.*
+import Symbols.*
+import Contexts.*
 
 object StdNames {
 
diff --git a/compiler/src/dotty/tools/dotc/core/Substituters.scala b/compiler/src/dotty/tools/dotc/core/Substituters.scala
index 245dad97c40b..4b0a9278ab10 100644
--- a/compiler/src/dotty/tools/dotc/core/Substituters.scala
+++ b/compiler/src/dotty/tools/dotc/core/Substituters.scala
@@ -1,9 +1,9 @@
 package dotty.tools.dotc
 package core
 
-import Types._
-import Symbols._
-import Contexts._
+import Types.*
+import Symbols.*
+import Contexts.*
 import cc.CaptureSet.IdempotentCaptRefMap
 
 /** Substitution operations on types. See the corresponding `subst` and
diff --git a/compiler/src/dotty/tools/dotc/core/SymDenotations.scala b/compiler/src/dotty/tools/dotc/core/SymDenotations.scala
index 840845598e98..e4bd0e05eb2d 100644
--- a/compiler/src/dotty/tools/dotc/core/SymDenotations.scala
+++ b/compiler/src/dotty/tools/dotc/core/SymDenotations.scala
@@ -9,27 +9,27 @@ import scala.annotation.internal.sharable
 import scala.compiletime.uninitialized
 import scala.util.control.NonFatal
 
-import Periods._
-import Contexts._
-import Symbols._
-import Denotations._
-import Names._
-import NameOps._
-import Annotations._
-import Types._
-import Flags._
-import Decorators._
-import DenotTransformers._
-import StdNames._
-import Scopes._
-import NameOps._
-import NameKinds._
+import Periods.*
+import Contexts.*
+import Symbols.*
+import Denotations.*
+import Names.*
+import NameOps.*
+import Annotations.*
+import Types.*
+import Flags.*
+import Decorators.*
+import DenotTransformers.*
+import StdNames.*
+import Scopes.*
+import NameOps.*
+import NameKinds.*
 import Phases.{Phase, typerPhase, unfusedPhases}
 import Constants.Constant
 import TypeApplications.TypeParamInfo
 import Scopes.Scope
-import Decorators._
-import ast._
+import Decorators.*
+import ast.*
 import ast.Trees.{LambdaTypeTree, TypeBoundsTree}
 import Trees.Literal
 import Variances.Variance
@@ -37,7 +37,7 @@ import annotation.tailrec
 import util.SimpleIdentityMap
 import util.Stats
 import config.Config
-import reporting._
+import reporting.*
 import collection.mutable
 import cc.{CapturingType, derivedCapturingType}
 
diff --git a/compiler/src/dotty/tools/dotc/core/SymUtils.scala b/compiler/src/dotty/tools/dotc/core/SymUtils.scala
index b3619357f0e5..6f251f052532 100644
--- a/compiler/src/dotty/tools/dotc/core/SymUtils.scala
+++ b/compiler/src/dotty/tools/dotc/core/SymUtils.scala
@@ -5,20 +5,20 @@ import dotty.tools.dotc.transform.sjs.JSSymUtils.sjsNeedsField
 
 import scala.annotation.tailrec
 
-import core._
-import Types._
-import Contexts._
-import Symbols._
-import SymDenotations._
-import Names._
-import NameOps._
-import StdNames._
-import NameKinds._
-import Flags._
-import Decorators._
+import core.*
+import Types.*
+import Contexts.*
+import Symbols.*
+import SymDenotations.*
+import Names.*
+import NameOps.*
+import StdNames.*
+import NameKinds.*
+import Flags.*
+import Decorators.*
 import Constants.Constant
 import Annotations.Annotation
-import Phases._
+import Phases.*
 import ast.tpd.Literal
 import transform.Mixin
 
diff --git a/compiler/src/dotty/tools/dotc/core/SymbolLoaders.scala b/compiler/src/dotty/tools/dotc/core/SymbolLoaders.scala
index 6065c219f1e8..26e8bae5fe04 100644
--- a/compiler/src/dotty/tools/dotc/core/SymbolLoaders.scala
+++ b/compiler/src/dotty/tools/dotc/core/SymbolLoaders.scala
@@ -18,17 +18,17 @@ import java.io.IOException
 import java.nio.channels.ClosedByInterruptException
 import scala.util.control.NonFatal
 
-import Contexts._
-import Symbols._
-import Flags._
-import SymDenotations._
-import Types._
-import Scopes._
-import Names._
-import NameOps._
-import StdNames._
+import Contexts.*
+import Symbols.*
+import Flags.*
+import SymDenotations.*
+import Types.*
+import Scopes.*
+import Names.*
+import NameOps.*
+import StdNames.*
 import classfile.{ClassfileParser, ClassfileTastyUUIDParser}
-import Decorators._
+import Decorators.*
 import util.Stats
 import reporting.trace
 import ast.desugar
diff --git a/compiler/src/dotty/tools/dotc/core/Symbols.scala b/compiler/src/dotty/tools/dotc/core/Symbols.scala
index a622588648a9..ab01e23aa937 100644
--- a/compiler/src/dotty/tools/dotc/core/Symbols.scala
+++ b/compiler/src/dotty/tools/dotc/core/Symbols.scala
@@ -8,22 +8,22 @@ import dotty.tools.tasty.TastyVersion
 import scala.annotation.internal.sharable
 import scala.compiletime.uninitialized
 
-import Periods._
-import Names._
-import Scopes._
-import Flags._
-import Decorators._
-import Contexts._
-import Phases._
-import SymDenotations._
-import Denotations._
-import printing.Texts._
+import Periods.*
+import Names.*
+import Scopes.*
+import Flags.*
+import Decorators.*
+import Contexts.*
+import Phases.*
+import SymDenotations.*
+import Denotations.*
+import printing.Texts.*
 import printing.Printer
-import Types._
-import util.Spans._
-import DenotTransformers._
-import StdNames._
-import NameOps._
+import Types.*
+import util.Spans.*
+import DenotTransformers.*
+import StdNames.*
+import NameOps.*
 import NameKinds.LazyImplicitName
 import ast.tpd
 import tpd.{Tree, TreeProvider, TreeOps}
diff --git a/compiler/src/dotty/tools/dotc/core/TypeApplications.scala b/compiler/src/dotty/tools/dotc/core/TypeApplications.scala
index 39e28353e91b..8145552fac6c 100644
--- a/compiler/src/dotty/tools/dotc/core/TypeApplications.scala
+++ b/compiler/src/dotty/tools/dotc/core/TypeApplications.scala
@@ -4,13 +4,13 @@ package core
 
 import dotty.tools.dotc.config.Config
 
-import Types._
-import Contexts._
-import Symbols._
+import Types.*
+import Contexts.*
+import Symbols.*
 import SymDenotations.LazyType
-import Decorators._
-import util.Stats._
-import Names._
+import Decorators.*
+import util.Stats.*
+import Names.*
 import StdNames.nme
 import Flags.{Module, Provisional}
 
diff --git a/compiler/src/dotty/tools/dotc/core/TypeComparer.scala b/compiler/src/dotty/tools/dotc/core/TypeComparer.scala
index f0457f99b607..cb9900526a60 100644
--- a/compiler/src/dotty/tools/dotc/core/TypeComparer.scala
+++ b/compiler/src/dotty/tools/dotc/core/TypeComparer.scala
@@ -4,14 +4,14 @@ package core
 
 import scala.util.control.NonFatal
 
-import Types._
-import Contexts._
-import Symbols._
-import Flags._
-import Names._
-import NameOps._
-import Denotations._
-import Decorators._
+import Types.*
+import Contexts.*
+import Symbols.*
+import Flags.*
+import Names.*
+import NameOps.*
+import Denotations.*
+import Decorators.*
 import Phases.{gettersPhase, elimByNamePhase}
 import StdNames.nme
 import TypeOps.refineUsingParent
@@ -22,14 +22,14 @@ import config.Feature.{migrateTo3, sourceVersion}
 import config.Printers.{subtyping, gadts, matchTypes, noPrinter}
 import config.SourceVersion
 import TypeErasure.{erasedLub, erasedGlb}
-import TypeApplications._
+import TypeApplications.*
 import Variances.{Variance, variancesConform}
 import Constants.Constant
 import typer.ProtoTypes.constrained
 import typer.Applications.productSelectorTypes
 import reporting.trace
 import annotation.constructorOnly
-import cc._
+import cc.*
 import NameKinds.WildcardParamName
 
 /** Provides methods to compare types.
diff --git a/compiler/src/dotty/tools/dotc/core/TypeErasure.scala b/compiler/src/dotty/tools/dotc/core/TypeErasure.scala
index 1904066a83ce..bcf12fecb756 100644
--- a/compiler/src/dotty/tools/dotc/core/TypeErasure.scala
+++ b/compiler/src/dotty/tools/dotc/core/TypeErasure.scala
@@ -4,22 +4,22 @@ package core
 
 import scala.annotation.tailrec
 
-import Symbols._
-import Types._
-import Contexts._
-import Flags._
-import Names._
-import StdNames._
-import Phases._
+import Symbols.*
+import Types.*
+import Contexts.*
+import Flags.*
+import Names.*
+import StdNames.*
+import Phases.*
 import Flags.JavaDefined
 import Uniques.unique
 import TypeOps.makePackageObjPrefixExplicit
 import backend.sjs.JSDefinitions
-import transform.ExplicitOuter._
-import transform.ValueClasses._
-import transform.ContextFunctionResults._
+import transform.ExplicitOuter.*
+import transform.ValueClasses.*
+import transform.ContextFunctionResults.*
 import unpickleScala2.Scala2Erasure
-import Decorators._
+import Decorators.*
 import Definitions.MaxImplementedFunctionArity
 
 /** The language in which the definition being erased was written. */
diff --git a/compiler/src/dotty/tools/dotc/core/TypeErrors.scala b/compiler/src/dotty/tools/dotc/core/TypeErrors.scala
index 120bf8bde7d2..1881c71d0d04 100644
--- a/compiler/src/dotty/tools/dotc/core/TypeErrors.scala
+++ b/compiler/src/dotty/tools/dotc/core/TypeErrors.scala
@@ -4,15 +4,15 @@ package core
 
 import scala.annotation.constructorOnly
 
-import Types._
-import Symbols._
-import Flags._
-import Names._
-import Contexts._
-import SymDenotations._
-import Denotations._
-import Decorators._
-import reporting._
+import Types.*
+import Symbols.*
+import Flags.*
+import Names.*
+import Contexts.*
+import SymDenotations.*
+import Denotations.*
+import Decorators.*
+import reporting.*
 import ast.untpd
 import util.Property
 import config.Printers.{cyclicErrors, noPrinter}
diff --git a/compiler/src/dotty/tools/dotc/core/TypeEval.scala b/compiler/src/dotty/tools/dotc/core/TypeEval.scala
index 1c85a127952f..44f34c4e5953 100644
--- a/compiler/src/dotty/tools/dotc/core/TypeEval.scala
+++ b/compiler/src/dotty/tools/dotc/core/TypeEval.scala
@@ -2,11 +2,11 @@ package dotty.tools
 package dotc
 package core
 
-import Types._
-import Contexts._
-import Symbols._
-import Constants._
-import Decorators._
+import Types.*
+import Contexts.*
+import Symbols.*
+import Constants.*
+import Decorators.*
 import config.Printers.typr
 import reporting.trace
 import StdNames.tpnme
diff --git a/compiler/src/dotty/tools/dotc/core/TypeOps.scala b/compiler/src/dotty/tools/dotc/core/TypeOps.scala
index a20c80b1e130..eefc1cd98497 100644
--- a/compiler/src/dotty/tools/dotc/core/TypeOps.scala
+++ b/compiler/src/dotty/tools/dotc/core/TypeOps.scala
@@ -5,25 +5,25 @@ package core
 import scala.annotation.internal.sharable
 import scala.annotation.threadUnsafe
 
-import Contexts._
-import Types._
-import Symbols._
-import Names._
-import NameKinds._
-import Flags._
-import SymDenotations._
-import util.Spans._
+import Contexts.*
+import Types.*
+import Symbols.*
+import Names.*
+import NameKinds.*
+import Flags.*
+import SymDenotations.*
+import util.Spans.*
 import util.Stats
-import Decorators._
-import StdNames._
+import Decorators.*
+import StdNames.*
 import collection.mutable
-import ast.tpd._
+import ast.tpd.*
 import reporting.trace
 import config.Printers.typr
 import config.Feature
-import typer.ProtoTypes._
+import typer.ProtoTypes.*
 import typer.ForceDegree
-import typer.Inferencing._
+import typer.Inferencing.*
 import typer.IfBottom
 import reporting.TestingReporter
 import cc.{CapturingType, derivedCapturingType, CaptureSet, isBoxed, isBoxedCapturing}
diff --git a/compiler/src/dotty/tools/dotc/core/TypeUtils.scala b/compiler/src/dotty/tools/dotc/core/TypeUtils.scala
index 1394cf11285f..9d236a6553d6 100644
--- a/compiler/src/dotty/tools/dotc/core/TypeUtils.scala
+++ b/compiler/src/dotty/tools/dotc/core/TypeUtils.scala
@@ -3,11 +3,11 @@ package dotc
 package core
 
 import TypeErasure.ErasedValueType
-import Types._
-import Contexts._
-import Symbols._
-import Flags._
-import Decorators._
+import Types.*
+import Contexts.*
+import Symbols.*
+import Flags.*
+import Decorators.*
 import Names.Name
 
 class TypeUtils {
diff --git a/compiler/src/dotty/tools/dotc/core/TyperState.scala b/compiler/src/dotty/tools/dotc/core/TyperState.scala
index edf853b44ce3..a4c3d828cc99 100644
--- a/compiler/src/dotty/tools/dotc/core/TyperState.scala
+++ b/compiler/src/dotty/tools/dotc/core/TyperState.scala
@@ -6,15 +6,15 @@ import java.lang.ref.WeakReference
 import scala.annotation.internal.sharable
 import scala.compiletime.uninitialized
 
-import Types._
-import Contexts._
+import Types.*
+import Contexts.*
 import util.SimpleIdentitySet
-import reporting._
+import reporting.*
 import config.Config
 import config.Printers.constr
 import collection.mutable
 import util.{Stats, SimpleIdentityMap}
-import Decorators._
+import Decorators.*
 
 object TyperState {
   @sharable private var nextId: Int = 0
diff --git a/compiler/src/dotty/tools/dotc/core/Types.scala b/compiler/src/dotty/tools/dotc/core/Types.scala
index 8802e93860fb..195e703b943d 100644
--- a/compiler/src/dotty/tools/dotc/core/Types.scala
+++ b/compiler/src/dotty/tools/dotc/core/Types.scala
@@ -5,35 +5,35 @@ package core
 import java.lang.ref.WeakReference
 import scala.annotation.internal.sharable
 import scala.annotation.threadUnsafe
-import scala.util.hashing.{ MurmurHash3 => hashing }
-
-import Symbols._
-import Flags._
-import Names._
-import StdNames._
-import NameOps._
-import NullOpsDecorator._
+import scala.util.hashing.MurmurHash3 as hashing
+
+import Symbols.*
+import Flags.*
+import Names.*
+import StdNames.*
+import NameOps.*
+import NullOpsDecorator.*
 import NameKinds.{SkolemName, WildcardParamName}
-import Scopes._
-import Constants._
-import Contexts._
-import Phases._
-import Annotations._
-import SymDenotations._
-import Decorators._
-import Denotations._
-import Periods._
-import CheckRealizable._
+import Scopes.*
+import Constants.*
+import Contexts.*
+import Phases.*
+import Annotations.*
+import SymDenotations.*
+import Decorators.*
+import Denotations.*
+import Periods.*
+import CheckRealizable.*
 import Variances.{Variance, setStructuralVariances, Invariant}
 import typer.Nullables
-import util.Stats._
+import util.Stats.*
 import util.{SimpleIdentityMap, SimpleIdentitySet}
-import ast.tpd._
+import ast.tpd.*
 import ast.TreeTypeMap
-import printing.Texts._
+import printing.Texts.*
 import printing.Printer
-import Hashable._
-import Uniques._
+import Hashable.*
+import Uniques.*
 import collection.mutable
 import config.Config
 import config.Feature.sourceVersion
diff --git a/compiler/src/dotty/tools/dotc/core/Uniques.scala b/compiler/src/dotty/tools/dotc/core/Uniques.scala
index 4ba357b5d7b0..072379ecd358 100644
--- a/compiler/src/dotty/tools/dotc/core/Uniques.scala
+++ b/compiler/src/dotty/tools/dotc/core/Uniques.scala
@@ -3,13 +3,13 @@ package core
 
 import scala.annotation.tailrec
 
-import Types._
-import Contexts._
-import util.Stats._
-import Hashable._
-import Names._
+import Types.*
+import Contexts.*
+import util.Stats.*
+import Hashable.*
+import Names.*
 import config.Config
-import Decorators._
+import Decorators.*
 import util.{WeakHashSet, Stats}
 import WeakHashSet.Entry
 
diff --git a/compiler/src/dotty/tools/dotc/core/Variances.scala b/compiler/src/dotty/tools/dotc/core/Variances.scala
index e53aedc61fa4..899620e752a4 100644
--- a/compiler/src/dotty/tools/dotc/core/Variances.scala
+++ b/compiler/src/dotty/tools/dotc/core/Variances.scala
@@ -1,13 +1,13 @@
 package dotty.tools.dotc
 package core
 
-import Types._
-import Contexts._
-import Flags._
-import Symbols._
-import Annotations._
+import Types.*
+import Contexts.*
+import Flags.*
+import Symbols.*
+import Annotations.*
 import TypeApplications.TypeParamInfo
-import Decorators._
+import Decorators.*
 
 object Variances {
 
diff --git a/compiler/src/dotty/tools/dotc/core/classfile/ClassfileParser.scala b/compiler/src/dotty/tools/dotc/core/classfile/ClassfileParser.scala
index 2753211d0d31..6f72f0a5bdac 100644
--- a/compiler/src/dotty/tools/dotc/core/classfile/ClassfileParser.scala
+++ b/compiler/src/dotty/tools/dotc/core/classfile/ClassfileParser.scala
@@ -18,23 +18,23 @@ import scala.compiletime.uninitialized
 import scala.language.unsafeNulls
 import scala.util.control.NonFatal
 
-import Contexts._
-import Symbols._
-import Types._
-import Names._
-import StdNames._
-import NameOps._
-import Scopes._
-import Decorators._
-import SymDenotations._
-import unpickleScala2.Scala2Unpickler._
-import Constants._
-import Annotations._
-import util.Spans._
-import Phases._
+import Contexts.*
+import Symbols.*
+import Types.*
+import Names.*
+import StdNames.*
+import NameOps.*
+import Scopes.*
+import Decorators.*
+import SymDenotations.*
+import unpickleScala2.Scala2Unpickler.*
+import Constants.*
+import Annotations.*
+import util.Spans.*
+import Phases.*
 import ast.{ tpd, untpd }
-import ast.tpd._
-import util._
+import ast.tpd.*
+import util.*
 import typer.Checking.checkNonCyclic
 import io.{AbstractFile, ZipArchive}
 
diff --git a/compiler/src/dotty/tools/dotc/core/classfile/ClassfileTastyUUIDParser.scala b/compiler/src/dotty/tools/dotc/core/classfile/ClassfileTastyUUIDParser.scala
index 4203fcca9690..1312d13d2b6d 100644
--- a/compiler/src/dotty/tools/dotc/core/classfile/ClassfileTastyUUIDParser.scala
+++ b/compiler/src/dotty/tools/dotc/core/classfile/ClassfileTastyUUIDParser.scala
@@ -1,13 +1,13 @@
 package dotty.tools.dotc
 package core.classfile
 
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Decorators._
-import dotty.tools.dotc.core.Names._
-import dotty.tools.dotc.core.StdNames._
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.core.Types._
-import dotty.tools.dotc.util._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Decorators.*
+import dotty.tools.dotc.core.Names.*
+import dotty.tools.dotc.core.StdNames.*
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.core.Types.*
+import dotty.tools.dotc.util.*
 import dotty.tools.io.AbstractFile
 import dotty.tools.tasty.TastyReader
 
diff --git a/compiler/src/dotty/tools/dotc/core/tasty/AttributePickler.scala b/compiler/src/dotty/tools/dotc/core/tasty/AttributePickler.scala
index 1c37cd5bdfe4..a50f375b4ca5 100644
--- a/compiler/src/dotty/tools/dotc/core/tasty/AttributePickler.scala
+++ b/compiler/src/dotty/tools/dotc/core/tasty/AttributePickler.scala
@@ -3,7 +3,7 @@ package dotty.tools.dotc.core.tasty
 import dotty.tools.dotc.ast.tpd
 import dotty.tools.dotc.ast.untpd
 import dotty.tools.tasty.TastyBuffer
-import dotty.tools.tasty.TastyFormat._
+import dotty.tools.tasty.TastyFormat.*
 
 object AttributePickler:
 
diff --git a/compiler/src/dotty/tools/dotc/core/tasty/Attributes.scala b/compiler/src/dotty/tools/dotc/core/tasty/Attributes.scala
index 62d9f780d31a..9e7c62ea9b5d 100644
--- a/compiler/src/dotty/tools/dotc/core/tasty/Attributes.scala
+++ b/compiler/src/dotty/tools/dotc/core/tasty/Attributes.scala
@@ -1,6 +1,6 @@
 package dotty.tools.dotc.core.tasty
 
-import dotty.tools.tasty.TastyFormat._
+import dotty.tools.tasty.TastyFormat.*
 
 import scala.collection.immutable.BitSet
 import scala.collection.immutable.TreeMap
diff --git a/compiler/src/dotty/tools/dotc/core/tasty/DottyUnpickler.scala b/compiler/src/dotty/tools/dotc/core/tasty/DottyUnpickler.scala
index 363cefe75f96..1d06a8814580 100644
--- a/compiler/src/dotty/tools/dotc/core/tasty/DottyUnpickler.scala
+++ b/compiler/src/dotty/tools/dotc/core/tasty/DottyUnpickler.scala
@@ -14,10 +14,10 @@ import dotty.tools.tasty.TastyVersion
 
 import scala.language.unsafeNulls
 
-import Contexts._
-import SymDenotations._
-import Decorators._
-import TastyUnpickler._
+import Contexts.*
+import SymDenotations.*
+import Decorators.*
+import TastyUnpickler.*
 import classfile.ClassfileParser
 import Names.SimpleName
 import TreeUnpickler.UnpickleMode
diff --git a/compiler/src/dotty/tools/dotc/core/tasty/NameBuffer.scala b/compiler/src/dotty/tools/dotc/core/tasty/NameBuffer.scala
index e83d342b20fe..5e9a3e086f8b 100644
--- a/compiler/src/dotty/tools/dotc/core/tasty/NameBuffer.scala
+++ b/compiler/src/dotty/tools/dotc/core/tasty/NameBuffer.scala
@@ -7,11 +7,11 @@ import dotty.tools.tasty.TastyBuffer
 
 import scala.io.Codec
 
-import TastyBuffer._
+import TastyBuffer.*
 import collection.mutable
 import Names.{Name, chrs, SimpleName, DerivedName, TypeName}
-import NameKinds._
-import NameOps._
+import NameKinds.*
+import NameOps.*
 import NameTags.{SIGNED, TARGETSIGNED}
 
 class NameBuffer extends TastyBuffer(10000) {
diff --git a/compiler/src/dotty/tools/dotc/core/tasty/PositionPickler.scala b/compiler/src/dotty/tools/dotc/core/tasty/PositionPickler.scala
index 9f294f975778..c29fb4ae1422 100644
--- a/compiler/src/dotty/tools/dotc/core/tasty/PositionPickler.scala
+++ b/compiler/src/dotty/tools/dotc/core/tasty/PositionPickler.scala
@@ -7,15 +7,15 @@ import dotty.tools.tasty.TastyBuffer
 import dotty.tools.tasty.TastyFormat.PositionsSection
 import dotty.tools.tasty.TastyFormat.SOURCE
 
-import TastyBuffer._
-import ast._
+import TastyBuffer.*
+import ast.*
 import Trees.WithLazyFields
 import util.{SourceFile, NoSource}
-import core._
-import Annotations._
-import Decorators._
+import core.*
+import Annotations.*
+import Decorators.*
 import collection.mutable
-import util.Spans._
+import util.Spans.*
 import reporting.Message
 
 object PositionPickler:
diff --git a/compiler/src/dotty/tools/dotc/core/tasty/PositionUnpickler.scala b/compiler/src/dotty/tools/dotc/core/tasty/PositionUnpickler.scala
index bf5aa255a3a2..13224274eb36 100644
--- a/compiler/src/dotty/tools/dotc/core/tasty/PositionUnpickler.scala
+++ b/compiler/src/dotty/tools/dotc/core/tasty/PositionUnpickler.scala
@@ -11,7 +11,7 @@ import scala.compiletime.uninitialized
 
 import TastyFormat.SOURCE
 import TastyBuffer.{Addr, NameRef}
-import util.Spans._
+import util.Spans.*
 import Names.TermName
 
 /** Unpickler for tree positions */
diff --git a/compiler/src/dotty/tools/dotc/core/tasty/TastyClassName.scala b/compiler/src/dotty/tools/dotc/core/tasty/TastyClassName.scala
index 5d75e45dc047..40386605bfa2 100644
--- a/compiler/src/dotty/tools/dotc/core/tasty/TastyClassName.scala
+++ b/compiler/src/dotty/tools/dotc/core/tasty/TastyClassName.scala
@@ -7,11 +7,11 @@ import dotty.tools.tasty.TastyFormat.ASTsSection
 import dotty.tools.tasty.TastyReader
 
 import TastyBuffer.NameRef
-import Contexts._
-import Decorators._
+import Contexts.*
+import Decorators.*
 import Names.TermName
 import StdNames.nme
-import TastyUnpickler._
+import TastyUnpickler.*
 
 /** Reads the package and class name of the class contained in this TASTy */
 class TastyClassName(bytes: Array[Byte]) {
diff --git a/compiler/src/dotty/tools/dotc/core/tasty/TastyPickler.scala b/compiler/src/dotty/tools/dotc/core/tasty/TastyPickler.scala
index 530aa3be6a3c..010d0e5e2794 100644
--- a/compiler/src/dotty/tools/dotc/core/tasty/TastyPickler.scala
+++ b/compiler/src/dotty/tools/dotc/core/tasty/TastyPickler.scala
@@ -9,11 +9,11 @@ import dotty.tools.tasty.TastyHash
 
 import scala.language.unsafeNulls
 
-import TastyFormat._
-import TastyBuffer._
+import TastyFormat.*
+import TastyBuffer.*
 import collection.mutable
 import core.Symbols.ClassSymbol
-import Decorators._
+import Decorators.*
 
 object TastyPickler:
   private val versionString = s"Scala ${config.Properties.simpleVersionString}"
diff --git a/compiler/src/dotty/tools/dotc/core/tasty/TastyPrinter.scala b/compiler/src/dotty/tools/dotc/core/tasty/TastyPrinter.scala
index bc9abaa3cbc2..1fcc88072da0 100644
--- a/compiler/src/dotty/tools/dotc/core/tasty/TastyPrinter.scala
+++ b/compiler/src/dotty/tools/dotc/core/tasty/TastyPrinter.scala
@@ -18,10 +18,10 @@ import java.nio.file.Paths
 import scala.compiletime.uninitialized
 
 import TastyBuffer.NameRef
-import Contexts._
-import Decorators._
+import Contexts.*
+import Decorators.*
 import Names.Name
-import TastyUnpickler._
+import TastyUnpickler.*
 import util.Spans.offsetToInt
 
 object TastyPrinter:
diff --git a/compiler/src/dotty/tools/dotc/core/tasty/TastyUnpickler.scala b/compiler/src/dotty/tools/dotc/core/tasty/TastyUnpickler.scala
index 7183dffa255b..ea626c9422b9 100644
--- a/compiler/src/dotty/tools/dotc/core/tasty/TastyUnpickler.scala
+++ b/compiler/src/dotty/tools/dotc/core/tasty/TastyUnpickler.scala
@@ -14,11 +14,11 @@ import dotty.tools.tasty.UnpicklerConfig
 import scala.collection.mutable
 import scala.language.unsafeNulls
 
-import TastyFormat.NameTags._
+import TastyFormat.NameTags.*
 import TastyFormat.nameTagToString
 import TastyBuffer.NameRef
 import Names.{TermName, termName, EmptyTermName}
-import NameKinds._
+import NameKinds.*
 
 object TastyUnpickler {
 
diff --git a/compiler/src/dotty/tools/dotc/core/tasty/TreePickler.scala b/compiler/src/dotty/tools/dotc/core/tasty/TreePickler.scala
index 40d893abc3fd..dbf03fd29318 100644
--- a/compiler/src/dotty/tools/dotc/core/tasty/TreePickler.scala
+++ b/compiler/src/dotty/tools/dotc/core/tasty/TreePickler.scala
@@ -3,24 +3,24 @@ package dotc
 package core
 package tasty
 
-import dotty.tools.tasty.TastyBuffer._
+import dotty.tools.tasty.TastyBuffer.*
+import dotty.tools.tasty.TastyFormat.*
 import dotty.tools.tasty.TastyFormat.ASTsSection
-import dotty.tools.tasty.TastyFormat._
 
 import scala.language.unsafeNulls
 
-import ast.Trees._
+import ast.Trees.*
 import ast.{untpd, tpd}
-import Contexts._
-import Symbols._
-import Types._
-import Names._
-import Constants._
-import Decorators._
-import Annotations._
-import Flags._
+import Contexts.*
+import Symbols.*
+import Types.*
+import Names.*
+import Constants.*
+import Decorators.*
+import Annotations.*
+import Flags.*
 import Comments.{Comment, docCtx}
-import NameKinds._
+import NameKinds.*
 import StdNames.{nme, tpnme}
 import config.Config
 import collection.mutable
diff --git a/compiler/src/dotty/tools/dotc/core/tasty/TreeUnpickler.scala b/compiler/src/dotty/tools/dotc/core/tasty/TreeUnpickler.scala
index e2dd17d9a690..89f55d9b7bcb 100644
--- a/compiler/src/dotty/tools/dotc/core/tasty/TreeUnpickler.scala
+++ b/compiler/src/dotty/tools/dotc/core/tasty/TreeUnpickler.scala
@@ -5,7 +5,7 @@ package tasty
 
 import dotty.tools.dotc.quoted.QuotePatterns
 import dotty.tools.tasty.TastyBuffer
-import dotty.tools.tasty.TastyFormat._
+import dotty.tools.tasty.TastyFormat.*
 import dotty.tools.tasty.TastyReader
 
 import scala.annotation.constructorOnly
@@ -18,32 +18,32 @@ import scala.compiletime.uninitialized
 import scala.language.unsafeNulls
 
 import Comments.docCtx
-import Contexts._
-import Symbols._
-import Types._
-import Scopes._
-import SymDenotations._
-import Denotations._
-import Names._
-import NameOps._
-import StdNames._
-import Flags._
-import Constants._
-import Annotations._
-import NameKinds._
-import NamerOps._
-import ContextOps._
+import Contexts.*
+import Symbols.*
+import Types.*
+import Scopes.*
+import SymDenotations.*
+import Denotations.*
+import Names.*
+import NameOps.*
+import StdNames.*
+import Flags.*
+import Constants.*
+import Annotations.*
+import NameKinds.*
+import NamerOps.*
+import ContextOps.*
 import Variances.Invariant
 import TastyUnpickler.NameTable
 import typer.ConstFold
 import typer.Checking.checkNonCyclic
-import typer.Nullables._
-import util.Spans._
+import typer.Nullables.*
+import util.Spans.*
 import util.{SourceFile, Property}
 import ast.{Trees, tpd, untpd}
-import Trees._
-import Decorators._
-import TastyBuffer._
+import Trees.*
+import Decorators.*
+import TastyBuffer.*
 import config.Printers.pickling
 
 /** Unpickler for typed trees
diff --git a/compiler/src/dotty/tools/dotc/core/unpickleScala2/PickleBuffer.scala b/compiler/src/dotty/tools/dotc/core/unpickleScala2/PickleBuffer.scala
index 4c00bd2c6dc2..e4c253fddc53 100644
--- a/compiler/src/dotty/tools/dotc/core/unpickleScala2/PickleBuffer.scala
+++ b/compiler/src/dotty/tools/dotc/core/unpickleScala2/PickleBuffer.scala
@@ -3,7 +3,7 @@ package dotc
 package core
 package unpickleScala2
 
-import Flags._
+import Flags.*
 
 /** Variable length byte arrays, with methods for basic pickling and unpickling.
  *
diff --git a/compiler/src/dotty/tools/dotc/core/unpickleScala2/Scala2Erasure.scala b/compiler/src/dotty/tools/dotc/core/unpickleScala2/Scala2Erasure.scala
index 08c101669a92..f9f068f15193 100644
--- a/compiler/src/dotty/tools/dotc/core/unpickleScala2/Scala2Erasure.scala
+++ b/compiler/src/dotty/tools/dotc/core/unpickleScala2/Scala2Erasure.scala
@@ -5,14 +5,14 @@ package unpickleScala2
 
 import scala.collection.mutable.ListBuffer
 
-import Symbols._
-import Types._
-import Contexts._
-import Flags._
-import Names._
-import StdNames._
-import Phases._
-import Decorators._
+import Symbols.*
+import Types.*
+import Contexts.*
+import Flags.*
+import Names.*
+import StdNames.*
+import Phases.*
+import Decorators.*
 
 /** Erasure logic specific to Scala 2 symbols. */
 object Scala2Erasure:
diff --git a/compiler/src/dotty/tools/dotc/core/unpickleScala2/Scala2Unpickler.scala b/compiler/src/dotty/tools/dotc/core/unpickleScala2/Scala2Unpickler.scala
index ed8293b07bcd..5d531200472f 100644
--- a/compiler/src/dotty/tools/dotc/core/unpickleScala2/Scala2Unpickler.scala
+++ b/compiler/src/dotty/tools/dotc/core/unpickleScala2/Scala2Unpickler.scala
@@ -14,38 +14,38 @@ import scala.collection.mutable
 import scala.collection.mutable.ListBuffer
 import scala.language.unsafeNulls
 
-import Contexts._
-import Symbols._
-import Types._
-import Scopes._
-import SymDenotations._
-import Names._
-import NameOps._
-import StdNames._
-import Denotations._
-import NameOps._
-import Flags._
-import Constants._
-import Annotations._
-import Phases._
+import Contexts.*
+import Symbols.*
+import Types.*
+import Scopes.*
+import SymDenotations.*
+import Names.*
+import NameOps.*
+import StdNames.*
+import Denotations.*
+import NameOps.*
+import Flags.*
+import Constants.*
+import Annotations.*
+import Phases.*
 import NameKinds.{Scala2MethodNameKinds, SuperAccessorName, ExpandedName}
-import util.Spans._
-import ast.tpd._
+import util.Spans.*
+import ast.tpd.*
 import ast.untpd.Modifiers
 import backend.sjs.JSDefinitions
-import printing.Texts._
+import printing.Texts.*
 import printing.Printer
 import io.AbstractFile
-import util.common._
+import util.common.*
 import util.NoSourcePosition
 import typer.Checking.checkNonCyclic
-import typer.Nullables._
-import PickleBuffer._
-import PickleFormat._
-import Decorators._
-import TypeApplications._
+import typer.Nullables.*
+import PickleBuffer.*
+import PickleFormat.*
+import Decorators.*
+import TypeApplications.*
 import classfile.ClassfileParser
-import reporting._
+import reporting.*
 
 object Scala2Unpickler {
 
diff --git a/compiler/src/dotty/tools/dotc/coverage/Location.scala b/compiler/src/dotty/tools/dotc/coverage/Location.scala
index cc73db914995..5871f2117e2f 100644
--- a/compiler/src/dotty/tools/dotc/coverage/Location.scala
+++ b/compiler/src/dotty/tools/dotc/coverage/Location.scala
@@ -2,12 +2,12 @@ package dotty.tools.dotc
 package coverage
 
 import dotty.tools.dotc.core.Contexts.Context
-import dotty.tools.dotc.core.Flags._
+import dotty.tools.dotc.core.Flags.*
 import dotty.tools.dotc.util.SourceFile
 
 import java.nio.file.Path
 
-import ast.tpd._
+import ast.tpd.*
 
 /** Information about the location of a coverable piece of code.
   *
diff --git a/compiler/src/dotty/tools/dotc/decompiler/DecompilationPrinter.scala b/compiler/src/dotty/tools/dotc/decompiler/DecompilationPrinter.scala
index be2edfc25c55..2052da885299 100644
--- a/compiler/src/dotty/tools/dotc/decompiler/DecompilationPrinter.scala
+++ b/compiler/src/dotty/tools/dotc/decompiler/DecompilationPrinter.scala
@@ -1,7 +1,7 @@
 package dotty.tools.dotc
 package decompiler
 
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.Phases.Phase
 import dotty.tools.io.File
 
diff --git a/compiler/src/dotty/tools/dotc/decompiler/IDEDecompilerDriver.scala b/compiler/src/dotty/tools/dotc/decompiler/IDEDecompilerDriver.scala
index 674c886e3eb9..d3bc22b45ff7 100644
--- a/compiler/src/dotty/tools/dotc/decompiler/IDEDecompilerDriver.scala
+++ b/compiler/src/dotty/tools/dotc/decompiler/IDEDecompilerDriver.scala
@@ -2,10 +2,10 @@ package dotty.tools
 package dotc
 package decompiler
 
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core._
+import dotty.tools.dotc.core.*
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.tasty.TastyHTMLPrinter
-import dotty.tools.dotc.reporting._
+import dotty.tools.dotc.reporting.*
 import dotty.tools.io.AbstractFile
 
 import scala.language.unsafeNulls
diff --git a/compiler/src/dotty/tools/dotc/decompiler/Main.scala b/compiler/src/dotty/tools/dotc/decompiler/Main.scala
index 9986e4c3144f..df69882e2455 100644
--- a/compiler/src/dotty/tools/dotc/decompiler/Main.scala
+++ b/compiler/src/dotty/tools/dotc/decompiler/Main.scala
@@ -1,7 +1,7 @@
 package dotty.tools.dotc.decompiler
 
 import dotty.tools.dotc
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.io.AbstractFile
 
 import java.nio.file.Files
diff --git a/compiler/src/dotty/tools/dotc/decompiler/TASTYDecompiler.scala b/compiler/src/dotty/tools/dotc/decompiler/TASTYDecompiler.scala
index 4a1517018005..df0930980a67 100644
--- a/compiler/src/dotty/tools/dotc/decompiler/TASTYDecompiler.scala
+++ b/compiler/src/dotty/tools/dotc/decompiler/TASTYDecompiler.scala
@@ -1,7 +1,7 @@
 package dotty.tools.dotc.decompiler
 
 import dotty.tools.dotc.core.Phases.Phase
-import dotty.tools.dotc.fromtasty._
+import dotty.tools.dotc.fromtasty.*
 
 /** Compiler from tasty to user readable high text representation
  *  of the compiled scala code.
diff --git a/compiler/src/dotty/tools/dotc/fromtasty/Debug.scala b/compiler/src/dotty/tools/dotc/fromtasty/Debug.scala
index b1c5d1ea0a84..ffd60fc7b12d 100644
--- a/compiler/src/dotty/tools/dotc/fromtasty/Debug.scala
+++ b/compiler/src/dotty/tools/dotc/fromtasty/Debug.scala
@@ -4,7 +4,7 @@ package fromtasty
 
 import dotty.tools.io.Directory
 
-import java.io.{File => JFile}
+import java.io.File as JFile
 import java.nio.file.Files
 import java.nio.file.Paths
 import scala.language.unsafeNulls
diff --git a/compiler/src/dotty/tools/dotc/fromtasty/ReadTasty.scala b/compiler/src/dotty/tools/dotc/fromtasty/ReadTasty.scala
index 734e723eaab6..74010b3f64d1 100644
--- a/compiler/src/dotty/tools/dotc/fromtasty/ReadTasty.scala
+++ b/compiler/src/dotty/tools/dotc/fromtasty/ReadTasty.scala
@@ -2,13 +2,13 @@ package dotty.tools
 package dotc
 package fromtasty
 
-import core._
-import Decorators._
-import Contexts._
+import core.*
+import Decorators.*
+import Contexts.*
 import Symbols.{Symbol, ClassSymbol}
 import SymDenotations.ClassDenotation
 import Denotations.staticRef
-import NameOps._
+import NameOps.*
 import ast.Trees.Tree
 import Phases.Phase
 import core.tasty.Attributes
diff --git a/compiler/src/dotty/tools/dotc/fromtasty/TASTYCompiler.scala b/compiler/src/dotty/tools/dotc/fromtasty/TASTYCompiler.scala
index 923892b62f13..c0adf454b063 100644
--- a/compiler/src/dotty/tools/dotc/fromtasty/TASTYCompiler.scala
+++ b/compiler/src/dotty/tools/dotc/fromtasty/TASTYCompiler.scala
@@ -2,8 +2,8 @@ package dotty.tools
 package dotc
 package fromtasty
 
-import core._
-import Contexts._
+import core.*
+import Contexts.*
 import Phases.Phase
 
 class TASTYCompiler extends Compiler {
diff --git a/compiler/src/dotty/tools/dotc/fromtasty/TASTYRun.scala b/compiler/src/dotty/tools/dotc/fromtasty/TASTYRun.scala
index 74fc6a246247..8ef3ac87f089 100644
--- a/compiler/src/dotty/tools/dotc/fromtasty/TASTYRun.scala
+++ b/compiler/src/dotty/tools/dotc/fromtasty/TASTYRun.scala
@@ -6,7 +6,7 @@ import java.io.File
 import scala.language.unsafeNulls
 
 import io.{JarArchive, AbstractFile, Path}
-import core.Contexts._
+import core.Contexts.*
 import core.Decorators.em
 
 class TASTYRun(comp: Compiler, ictx: Context) extends Run(comp, ictx) {
diff --git a/compiler/src/dotty/tools/dotc/inlines/InlineReducer.scala b/compiler/src/dotty/tools/dotc/inlines/InlineReducer.scala
index 93b222de408e..61e59e0c8a4f 100644
--- a/compiler/src/dotty/tools/dotc/inlines/InlineReducer.scala
+++ b/compiler/src/dotty/tools/dotc/inlines/InlineReducer.scala
@@ -2,15 +2,15 @@ package dotty.tools
 package dotc
 package inlines
 
-import ast._
-import core._
-import Flags._
-import Symbols._
-import Types._
-import Decorators._
-import Contexts._
+import ast.*
+import core.*
+import Flags.*
+import Symbols.*
+import Types.*
+import Decorators.*
+import Contexts.*
 import StdNames.nme
-import typer._
+import typer.*
 import Names.TermName
 import NameKinds.{InlineAccessorName, InlineBinderName, InlineScrutineeName}
 import config.Printers.inlining
diff --git a/compiler/src/dotty/tools/dotc/inlines/Inliner.scala b/compiler/src/dotty/tools/dotc/inlines/Inliner.scala
index b9f92e4b91b8..4ed07bf1f38d 100644
--- a/compiler/src/dotty/tools/dotc/inlines/Inliner.scala
+++ b/compiler/src/dotty/tools/dotc/inlines/Inliner.scala
@@ -7,16 +7,16 @@ import dotty.tools.dotc.transform.Splicer
 
 import scala.annotation.constructorOnly
 
-import ast._
-import core._
-import Flags._
-import Symbols._
-import Types._
-import Decorators._
-import Constants._
-import Contexts._
+import ast.*
+import core.*
+import Flags.*
+import Symbols.*
+import Types.*
+import Decorators.*
+import Constants.*
+import Contexts.*
 import StdNames.nme
-import typer._
+import typer.*
 import Names.Name
 import NameKinds.InlineBinderName
 import ProtoTypes.shallowSelectionProto
diff --git a/compiler/src/dotty/tools/dotc/inlines/Inlines.scala b/compiler/src/dotty/tools/dotc/inlines/Inlines.scala
index 2b03b3c0331f..24d80bd8f1d4 100644
--- a/compiler/src/dotty/tools/dotc/inlines/Inlines.scala
+++ b/compiler/src/dotty/tools/dotc/inlines/Inlines.scala
@@ -6,16 +6,16 @@ import dotty.tools.dotc.util.SourceFile
 import dotty.tools.dotc.util.SourcePosition
 import dotty.tools.dotc.util.SrcPos
 
-import ast._
-import core._
-import Flags._
-import Symbols._
-import Types._
-import Decorators._
-import Constants._
-import Contexts._
+import ast.*
+import core.*
+import Flags.*
+import Symbols.*
+import Types.*
+import Decorators.*
+import Constants.*
+import Contexts.*
 import StdNames.{tpnme, nme}
-import typer._
+import typer.*
 import NameKinds.BodyRetainerName
 import SymDenotations.SymDenotation
 import config.Printers.inlining
diff --git a/compiler/src/dotty/tools/dotc/inlines/PrepareInlineable.scala b/compiler/src/dotty/tools/dotc/inlines/PrepareInlineable.scala
index 3879fe4e2f70..9ec60cbac5cc 100644
--- a/compiler/src/dotty/tools/dotc/inlines/PrepareInlineable.scala
+++ b/compiler/src/dotty/tools/dotc/inlines/PrepareInlineable.scala
@@ -8,20 +8,20 @@ import dotty.tools.dotc.ast.untpd
 import dotty.tools.dotc.reporting.Message
 import dotty.tools.dotc.util.SrcPos
 
-import Trees._
-import core._
-import Flags._
-import Symbols._
-import Flags._
-import Types._
-import Decorators._
+import Trees.*
+import core.*
+import Flags.*
+import Symbols.*
+import Flags.*
+import Types.*
+import Decorators.*
 import StdNames.nme
-import Contexts._
+import Contexts.*
 import Names.{Name, TermName}
 import NameKinds.{InlineAccessorName, UniqueInlineName}
 import inlines.Inlines
-import NameOps._
-import Annotations._
+import NameOps.*
+import Annotations.*
 import transform.{AccessProxies, Splicer}
 import staging.CrossStageSafety
 import config.Printers.inlining
diff --git a/compiler/src/dotty/tools/dotc/interactive/Completion.scala b/compiler/src/dotty/tools/dotc/interactive/Completion.scala
index e03f1833e0a0..16621620eebf 100644
--- a/compiler/src/dotty/tools/dotc/interactive/Completion.scala
+++ b/compiler/src/dotty/tools/dotc/interactive/Completion.scala
@@ -4,17 +4,17 @@ import dotty.tools.dotc.ast.NavigateAST
 import dotty.tools.dotc.ast.untpd
 import dotty.tools.dotc.config.Printers.interactiv
 import dotty.tools.dotc.core.ContextOps.localContext
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Decorators._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Decorators.*
 import dotty.tools.dotc.core.Denotations.SingleDenotation
-import dotty.tools.dotc.core.Flags._
+import dotty.tools.dotc.core.Flags.*
 import dotty.tools.dotc.core.NameKinds.SimpleNameKind
-import dotty.tools.dotc.core.NameOps._
+import dotty.tools.dotc.core.NameOps.*
 import dotty.tools.dotc.core.Names
 import dotty.tools.dotc.core.Names.Name
 import dotty.tools.dotc.core.Names.TermName
 import dotty.tools.dotc.core.Phases
-import dotty.tools.dotc.core.Scopes._
+import dotty.tools.dotc.core.Scopes.*
 import dotty.tools.dotc.core.StdNames.nme
 import dotty.tools.dotc.core.SymDenotations.SymDenotation
 import dotty.tools.dotc.core.Symbols
diff --git a/compiler/src/dotty/tools/dotc/interactive/Interactive.scala b/compiler/src/dotty/tools/dotc/interactive/Interactive.scala
index ed48b9adf196..bbbc56681ba9 100644
--- a/compiler/src/dotty/tools/dotc/interactive/Interactive.scala
+++ b/compiler/src/dotty/tools/dotc/interactive/Interactive.scala
@@ -2,21 +2,21 @@ package dotty.tools
 package dotc
 package interactive
 
-import scala.collection._
+import scala.collection.*
 import scala.language.unsafeNulls
 
 import ast.{NavigateAST, Trees, tpd, untpd}
-import core._
-import Decorators._
-import ContextOps._
-import Contexts._
-import Flags._
-import Names._
-import NameOps._
-import Symbols._
-import Trees._
-import Types._
-import util.Spans._
+import core.*
+import Decorators.*
+import ContextOps.*
+import Contexts.*
+import Flags.*
+import Names.*
+import NameOps.*
+import Symbols.*
+import Trees.*
+import Types.*
+import util.Spans.*
 import util.SourceFile
 import util.SourcePosition
 
diff --git a/compiler/src/dotty/tools/dotc/interactive/InteractiveCompiler.scala b/compiler/src/dotty/tools/dotc/interactive/InteractiveCompiler.scala
index 38a93125a342..af1484896c72 100644
--- a/compiler/src/dotty/tools/dotc/interactive/InteractiveCompiler.scala
+++ b/compiler/src/dotty/tools/dotc/interactive/InteractiveCompiler.scala
@@ -2,10 +2,10 @@ package dotty.tools
 package dotc
 package interactive
 
-import core._
-import Phases._
-import parsing._
-import typer._
+import core.*
+import Phases.*
+import parsing.*
+import typer.*
 
 class InteractiveCompiler extends Compiler {
   // TODO: Figure out what phases should be run in IDEs
diff --git a/compiler/src/dotty/tools/dotc/interactive/InteractiveDriver.scala b/compiler/src/dotty/tools/dotc/interactive/InteractiveDriver.scala
index 26218cd02af0..b6305741d5ec 100644
--- a/compiler/src/dotty/tools/dotc/interactive/InteractiveDriver.scala
+++ b/compiler/src/dotty/tools/dotc/interactive/InteractiveDriver.scala
@@ -4,30 +4,30 @@ package interactive
 
 import dotty.tools.io.AbstractFile
 
-import java.io._
+import java.io.*
 import java.net.URI
 import java.nio.charset.StandardCharsets
-import java.nio.file._
+import java.nio.file.*
 import java.nio.file.attribute.BasicFileAttributes
-import java.util.zip._
-import scala.collection._
+import java.util.zip.*
+import scala.collection.*
 import scala.io.Codec
 import scala.language.unsafeNulls
 
 import ast.{Trees, tpd}
-import core._
-import core.Decorators._
-import Contexts._
-import Names._
-import NameOps._
-import Symbols._
-import SymDenotations._
-import Trees._
-import Types._
+import core.*
+import core.Decorators.*
+import Contexts.*
+import Names.*
+import NameOps.*
+import Symbols.*
+import SymDenotations.*
+import Trees.*
+import Types.*
 import Denotations.staticRef
-import classpath._
-import reporting._
-import util._
+import classpath.*
+import reporting.*
+import util.*
 
 /** A Driver subclass designed to be used from IDEs */
 class InteractiveDriver(val settings: List[String]) extends Driver {
diff --git a/compiler/src/dotty/tools/dotc/interactive/SourceTree.scala b/compiler/src/dotty/tools/dotc/interactive/SourceTree.scala
index e3e1fbfe1d56..90d7a38f0a41 100644
--- a/compiler/src/dotty/tools/dotc/interactive/SourceTree.scala
+++ b/compiler/src/dotty/tools/dotc/interactive/SourceTree.scala
@@ -4,13 +4,13 @@ package interactive
 
 
 import ast.tpd
-import core._
-import Contexts._
-import NameOps._
-import Symbols._
-import StdNames._
-import util._
-import util.Spans._
+import core.*
+import Contexts.*
+import NameOps.*
+import Symbols.*
+import StdNames.*
+import util.*
+import util.Spans.*
 
 /**
  * A `tree` coming from `source`
diff --git a/compiler/src/dotty/tools/dotc/parsing/CharArrayReader.scala b/compiler/src/dotty/tools/dotc/parsing/CharArrayReader.scala
index 1b6f3e2c156a..516b16571dee 100644
--- a/compiler/src/dotty/tools/dotc/parsing/CharArrayReader.scala
+++ b/compiler/src/dotty/tools/dotc/parsing/CharArrayReader.scala
@@ -4,7 +4,7 @@ package parsing
 
 import scala.compiletime.uninitialized
 
-import util.Chars._
+import util.Chars.*
 
 abstract class CharArrayReader { self =>
 
diff --git a/compiler/src/dotty/tools/dotc/parsing/JavaParsers.scala b/compiler/src/dotty/tools/dotc/parsing/JavaParsers.scala
index 0ba7199555d4..c2ac66d401f1 100644
--- a/compiler/src/dotty/tools/dotc/parsing/JavaParsers.scala
+++ b/compiler/src/dotty/tools/dotc/parsing/JavaParsers.scala
@@ -10,20 +10,20 @@ import dotty.tools.dotc.util.SourceFile
 import scala.collection.mutable.LinkedHashMap
 import scala.collection.mutable.ListBuffer
 
-import JavaTokens._
-import JavaScanners._
+import JavaTokens.*
+import JavaScanners.*
 import Scanners.Offset
-import Parsers._
-import core._
-import Contexts._
+import Parsers.*
+import core.*
+import Contexts.*
 import Symbols.defn
-import Names._
-import Types._
-import ast.Trees._
-import Decorators._
-import StdNames._
-import reporting._
-import util.Spans._
+import Names.*
+import Types.*
+import ast.Trees.*
+import Decorators.*
+import StdNames.*
+import reporting.*
+import util.Spans.*
 
 object JavaParsers {
 
diff --git a/compiler/src/dotty/tools/dotc/parsing/JavaScanners.scala b/compiler/src/dotty/tools/dotc/parsing/JavaScanners.scala
index 54e7877eac7b..b02b02970b39 100644
--- a/compiler/src/dotty/tools/dotc/parsing/JavaScanners.scala
+++ b/compiler/src/dotty/tools/dotc/parsing/JavaScanners.scala
@@ -5,12 +5,12 @@ package parsing
 import scala.annotation.switch
 import scala.annotation.tailrec
 
-import core.Contexts._
+import core.Contexts.*
 import core.Names.SimpleName
-import Scanners._
+import Scanners.*
 import util.SourceFile
-import JavaTokens._
-import util.Chars._
+import JavaTokens.*
+import util.Chars.*
 import PartialFunction.cond
 import core.Decorators.em
 
diff --git a/compiler/src/dotty/tools/dotc/parsing/Parsers.scala b/compiler/src/dotty/tools/dotc/parsing/Parsers.scala
index 5b60bdd82608..916c577805ba 100644
--- a/compiler/src/dotty/tools/dotc/parsing/Parsers.scala
+++ b/compiler/src/dotty/tools/dotc/parsing/Parsers.scala
@@ -11,29 +11,29 @@ import scala.collection.mutable.ListBuffer
 import scala.language.unsafeNulls
 
 import util.{ SourceFile, SourcePosition, NoSourcePosition }
-import Tokens._
-import Scanners._
+import Tokens.*
+import Scanners.*
 import xml.MarkupParsers.MarkupParser
-import core._
-import Flags._
-import Contexts._
-import Names._
+import core.*
+import Flags.*
+import Contexts.*
+import Names.*
 import NameKinds.{WildcardParamName, QualifiedName}
-import NameOps._
+import NameOps.*
 import ast.{Positioned, Trees}
-import ast.Trees._
-import StdNames._
-import util.Spans._
-import Constants._
+import ast.Trees.*
+import StdNames.*
+import util.Spans.*
+import Constants.*
 import Symbols.NoSymbol
-import ScriptParsers._
-import Decorators._
+import ScriptParsers.*
+import Decorators.*
 import util.Chars
 import rewrites.Rewrites.{patch, overlapsPatch}
-import reporting._
+import reporting.*
 import config.Feature
 import config.Feature.{sourceVersion, migrateTo3, globalOnlyImports}
-import config.SourceVersion._
+import config.SourceVersion.*
 import config.SourceVersion
 
 object Parsers {
diff --git a/compiler/src/dotty/tools/dotc/parsing/Scanners.scala b/compiler/src/dotty/tools/dotc/parsing/Scanners.scala
index 328d3c75b4f6..9a8f6588a696 100644
--- a/compiler/src/dotty/tools/dotc/parsing/Scanners.scala
+++ b/compiler/src/dotty/tools/dotc/parsing/Scanners.scala
@@ -12,18 +12,18 @@ import scala.collection.immutable.SortedMap
 import scala.collection.mutable
 import scala.language.unsafeNulls
 
-import core.Names._
-import core.Contexts._
-import core.Decorators._
-import util.Spans._
-import core.StdNames._
-import core.Comments._
+import core.Names.*
+import core.Contexts.*
+import core.Decorators.*
+import util.Spans.*
+import core.StdNames.*
+import core.Comments.*
 import util.SourceFile
-import util.Chars._
+import util.Chars.*
 import util.{SourcePosition, CharBuffer}
 import util.Spans.Span
 import config.Config
-import Tokens._
+import Tokens.*
 import rewrites.Rewrites.patch
 import config.Feature
 import config.Feature.{migrateTo3, fewerBracesEnabled}
diff --git a/compiler/src/dotty/tools/dotc/parsing/ScriptParsers.scala b/compiler/src/dotty/tools/dotc/parsing/ScriptParsers.scala
index 1e78e380c65b..d71e4cf11102 100644
--- a/compiler/src/dotty/tools/dotc/parsing/ScriptParsers.scala
+++ b/compiler/src/dotty/tools/dotc/parsing/ScriptParsers.scala
@@ -3,9 +3,9 @@ package dotc
 package parsing
 
 import util.SourceFile
-import core._
-import Contexts._
-import Parsers._
+import core.*
+import Contexts.*
+import Parsers.*
 
 
 /** <p>Performs the following context-free rewritings:</p>
diff --git a/compiler/src/dotty/tools/dotc/parsing/Tokens.scala b/compiler/src/dotty/tools/dotc/parsing/Tokens.scala
index eea68594b08d..fbf4e8d701dd 100644
--- a/compiler/src/dotty/tools/dotc/parsing/Tokens.scala
+++ b/compiler/src/dotty/tools/dotc/parsing/Tokens.scala
@@ -5,7 +5,7 @@ package parsing
 import scala.language.unsafeNulls
 
 import collection.immutable.BitSet
-import core.Decorators._
+import core.Decorators.*
 import core.StdNames.nme
 
 abstract class TokensCommon {
diff --git a/compiler/src/dotty/tools/dotc/parsing/package.scala b/compiler/src/dotty/tools/dotc/parsing/package.scala
index ee3ecda60aee..0e51b487d7c4 100644
--- a/compiler/src/dotty/tools/dotc/parsing/package.scala
+++ b/compiler/src/dotty/tools/dotc/parsing/package.scala
@@ -1,9 +1,9 @@
 package dotty.tools.dotc
 
-import util.Chars._
+import util.Chars.*
 import core.Names.Name
 import core.StdNames.nme
-import core.NameOps._
+import core.NameOps.*
 
 package object parsing {
 
diff --git a/compiler/src/dotty/tools/dotc/parsing/xml/MarkupParserCommon.scala b/compiler/src/dotty/tools/dotc/parsing/xml/MarkupParserCommon.scala
index 091604a3ed06..f30b0b4f6b0d 100644
--- a/compiler/src/dotty/tools/dotc/parsing/xml/MarkupParserCommon.scala
+++ b/compiler/src/dotty/tools/dotc/parsing/xml/MarkupParserCommon.scala
@@ -11,7 +11,7 @@ package xml
 
 import scala.collection.BufferedIterator
 
-import Utility._
+import Utility.*
 import util.Chars.SU
 
 /** This is not a public trait - it contains common code shared
diff --git a/compiler/src/dotty/tools/dotc/parsing/xml/MarkupParsers.scala b/compiler/src/dotty/tools/dotc/parsing/xml/MarkupParsers.scala
index 88fca6358a28..8676a5ab705b 100644
--- a/compiler/src/dotty/tools/dotc/parsing/xml/MarkupParsers.scala
+++ b/compiler/src/dotty/tools/dotc/parsing/xml/MarkupParsers.scala
@@ -12,13 +12,13 @@ import scala.util.control.ControlThrowable
 import core.Contexts.Context
 import mutable.{ Buffer, ArrayBuffer, ListBuffer }
 import util.Chars.SU
-import Parsers._
-import util.Spans._
-import core._
-import Constants._
+import Parsers.*
+import util.Spans.*
+import core.*
+import Constants.*
 import Decorators.{em, toMessage}
 import util.SourceFile
-import Utility._
+import Utility.*
 
 
 // XXX/Note: many/most of the functions in here are almost direct cut and pastes
diff --git a/compiler/src/dotty/tools/dotc/parsing/xml/SymbolicXMLBuilder.scala b/compiler/src/dotty/tools/dotc/parsing/xml/SymbolicXMLBuilder.scala
index ab41d5a32845..f13352f0c371 100644
--- a/compiler/src/dotty/tools/dotc/parsing/xml/SymbolicXMLBuilder.scala
+++ b/compiler/src/dotty/tools/dotc/parsing/xml/SymbolicXMLBuilder.scala
@@ -7,16 +7,16 @@ import scala.collection.mutable
 import scala.compiletime.uninitialized
 import scala.language.unsafeNulls
 
-import core._
-import Decorators._
+import core.*
+import Decorators.*
 import Flags.Mutable
-import Names._
-import StdNames._
-import ast.Trees._
+import Names.*
+import StdNames.*
+import ast.Trees.*
 import ast.{tpd, untpd}
-import Symbols._
-import Contexts._
-import util.Spans._
+import Symbols.*
+import Contexts.*
+import util.Spans.*
 import Parsers.Parser
 
 /** This class builds instance of `Tree` that represent XML.
diff --git a/compiler/src/dotty/tools/dotc/plugins/Plugin.scala b/compiler/src/dotty/tools/dotc/plugins/Plugin.scala
index 98d291e8a63d..a691c4d94f71 100644
--- a/compiler/src/dotty/tools/dotc/plugins/Plugin.scala
+++ b/compiler/src/dotty/tools/dotc/plugins/Plugin.scala
@@ -1,7 +1,7 @@
 package dotty.tools.dotc
 package plugins
 
-import dotty.tools.io._
+import dotty.tools.io.*
 
 import java.io.InputStream
 import java.util.Properties
@@ -10,9 +10,9 @@ import scala.util.Failure
 import scala.util.Success
 import scala.util.Try
 
-import core._
-import Contexts._
-import Phases._
+import core.*
+import Contexts.*
+import Phases.*
 import transform.MegaPhase.MiniPhase
 
 trait PluginPhase extends MiniPhase {
diff --git a/compiler/src/dotty/tools/dotc/plugins/Plugins.scala b/compiler/src/dotty/tools/dotc/plugins/Plugins.scala
index 7af1d16859d1..75a3fa6f3cab 100644
--- a/compiler/src/dotty/tools/dotc/plugins/Plugins.scala
+++ b/compiler/src/dotty/tools/dotc/plugins/Plugins.scala
@@ -1,17 +1,17 @@
 package dotty.tools.dotc
 package plugins
 
-import dotty.tools.io._
+import dotty.tools.io.*
 
 import scala.compiletime.uninitialized
 import scala.language.unsafeNulls
 
-import core._
-import Contexts._
+import core.*
+import Contexts.*
 import Decorators.em
 import config.{ PathResolver, Feature }
-import Phases._
-import config.Printers.plugins.{ println => debug }
+import Phases.*
+import config.Printers.plugins.println as debug
 import config.Properties
 
 /** Support for run-time loading of compiler plugins.
diff --git a/compiler/src/dotty/tools/dotc/printing/Formatting.scala b/compiler/src/dotty/tools/dotc/printing/Formatting.scala
index 7c9564a7e3b9..f9dbb41ec073 100644
--- a/compiler/src/dotty/tools/dotc/printing/Formatting.scala
+++ b/compiler/src/dotty/tools/dotc/printing/Formatting.scala
@@ -5,16 +5,16 @@ package printing
 import scala.collection.mutable
 import scala.language.unsafeNulls
 
-import core._
-import Texts._
-import Types._
-import Flags._
-import Symbols._
-import Contexts._
-import Decorators._
+import core.*
+import Texts.*
+import Types.*
+import Flags.*
+import Symbols.*
+import Contexts.*
+import Decorators.*
 import reporting.Message
 import util.DiffUtil
-import Highlighting._
+import Highlighting.*
 
 object Formatting {
 
diff --git a/compiler/src/dotty/tools/dotc/printing/Highlighting.scala b/compiler/src/dotty/tools/dotc/printing/Highlighting.scala
index fe02becb9a97..70c6b80f7e45 100644
--- a/compiler/src/dotty/tools/dotc/printing/Highlighting.scala
+++ b/compiler/src/dotty/tools/dotc/printing/Highlighting.scala
@@ -4,7 +4,7 @@ package printing
 
 import scala.collection.mutable
 
-import core.Contexts._
+import core.Contexts.*
 
 object Highlighting {
 
diff --git a/compiler/src/dotty/tools/dotc/printing/MessageLimiter.scala b/compiler/src/dotty/tools/dotc/printing/MessageLimiter.scala
index c9ac4a5af4ce..24f02f37956e 100644
--- a/compiler/src/dotty/tools/dotc/printing/MessageLimiter.scala
+++ b/compiler/src/dotty/tools/dotc/printing/MessageLimiter.scala
@@ -2,8 +2,8 @@ package dotty.tools
 package dotc
 package printing
 
-import core._
-import Contexts._
+import core.*
+import Contexts.*
 import util.Property
 import Texts.Text
 
diff --git a/compiler/src/dotty/tools/dotc/printing/OutlinePrinter.scala b/compiler/src/dotty/tools/dotc/printing/OutlinePrinter.scala
index bb3024508237..cd8267355201 100644
--- a/compiler/src/dotty/tools/dotc/printing/OutlinePrinter.scala
+++ b/compiler/src/dotty/tools/dotc/printing/OutlinePrinter.scala
@@ -2,15 +2,15 @@ package dotty.tools
 package dotc
 package printing
 
-import core._
-import Texts._
-import Flags._
-import NameOps._
-import StdNames._
-import Contexts._
-import Symbols._
+import core.*
+import Texts.*
+import Flags.*
+import NameOps.*
+import StdNames.*
+import Contexts.*
+import Symbols.*
 import ast.{Trees, untpd}
-import Trees._
+import Trees.*
 
 object OutlinePrinter:
   def apply(_ctx: Context): Printer = new OutlinePrinter(_ctx)
diff --git a/compiler/src/dotty/tools/dotc/printing/PlainPrinter.scala b/compiler/src/dotty/tools/dotc/printing/PlainPrinter.scala
index 920c9f13f140..3a4c21ba8b78 100644
--- a/compiler/src/dotty/tools/dotc/printing/PlainPrinter.scala
+++ b/compiler/src/dotty/tools/dotc/printing/PlainPrinter.scala
@@ -4,23 +4,23 @@ package printing
 import scala.annotation.switch
 import scala.util.control.NonFatal
 
-import core._
-import Texts._
-import Types._
-import Flags._
-import Names._
-import Symbols._
-import NameOps._
-import Constants._
-import Denotations._
-import StdNames._
-import Contexts._
+import core.*
+import Texts.*
+import Types.*
+import Flags.*
+import Names.*
+import Symbols.*
+import NameOps.*
+import Constants.*
+import Denotations.*
+import StdNames.*
+import Contexts.*
 import Scopes.Scope
 import Denotations.Denotation
 import Annotations.Annotation
 import StdNames.nme
-import ast.Trees._
-import typer.Implicits._
+import ast.Trees.*
+import typer.Implicits.*
 import typer.ImportInfo
 import Variances.varianceSign
 import util.SourcePosition
diff --git a/compiler/src/dotty/tools/dotc/printing/Printer.scala b/compiler/src/dotty/tools/dotc/printing/Printer.scala
index 240e6526a461..dd5bc0faf176 100644
--- a/compiler/src/dotty/tools/dotc/printing/Printer.scala
+++ b/compiler/src/dotty/tools/dotc/printing/Printer.scala
@@ -4,18 +4,18 @@ package printing
 
 import scala.annotation.internal.sharable
 
-import core._
-import Texts._
-import ast.Trees._
+import core.*
+import Texts.*
+import ast.Trees.*
 import Types.{Type, SingletonType, LambdaParam, NamedType}
 import Symbols.Symbol
 import Scopes.Scope
 import Constants.Constant
 import Names.Name
-import Denotations._
+import Denotations.*
 import Annotations.Annotation
 import Contexts.Context
-import typer.Implicits._
+import typer.Implicits.*
 import util.SourcePosition
 import typer.ImportInfo
 import cc.CaptureSet
diff --git a/compiler/src/dotty/tools/dotc/printing/RefinedPrinter.scala b/compiler/src/dotty/tools/dotc/printing/RefinedPrinter.scala
index 63a917f54b49..6ebd8be26c83 100644
--- a/compiler/src/dotty/tools/dotc/printing/RefinedPrinter.scala
+++ b/compiler/src/dotty/tools/dotc/printing/RefinedPrinter.scala
@@ -12,25 +12,25 @@ import dotty.tools.dotc.ast.untpd.ValOrDefDef
 import dotty.tools.dotc.parsing.JavaParsers
 import dotty.tools.dotc.util.SourcePosition
 
-import core._
-import Constants._
-import Texts._
-import Types._
-import Flags._
-import Names._
-import Symbols._
-import NameOps._
+import core.*
+import Constants.*
+import Texts.*
+import Types.*
+import Flags.*
+import Names.*
+import Symbols.*
+import NameOps.*
 import TypeErasure.ErasedValueType
-import Contexts._
+import Contexts.*
 import Annotations.Annotation
-import Denotations._
-import SymDenotations._
+import Denotations.*
+import SymDenotations.*
 import StdNames.{nme, tpnme}
 import ast.{Trees, tpd, untpd}
 import typer.{Implicits, Namer, Applications}
-import typer.ProtoTypes._
-import Trees._
-import TypeApplications._
+import typer.ProtoTypes.*
+import Trees.*
+import TypeApplications.*
 import NameKinds.{WildcardParamName, DefaultGetterName}
 import util.Chars.isOperatorPart
 import config.{Config, Feature}
diff --git a/compiler/src/dotty/tools/dotc/printing/ReplPrinter.scala b/compiler/src/dotty/tools/dotc/printing/ReplPrinter.scala
index ea3afef27fae..f02cbf159224 100644
--- a/compiler/src/dotty/tools/dotc/printing/ReplPrinter.scala
+++ b/compiler/src/dotty/tools/dotc/printing/ReplPrinter.scala
@@ -2,13 +2,13 @@ package dotty.tools.dotc.printing
 
 import dotty.tools.dotc.core.Constants
 import dotty.tools.dotc.core.Constants.Constant
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Flags._
-import dotty.tools.dotc.core.NameOps._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Flags.*
+import dotty.tools.dotc.core.NameOps.*
 import dotty.tools.dotc.core.Names.Name
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.core.Types._
-import dotty.tools.dotc.printing.Texts._
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.core.Types.*
+import dotty.tools.dotc.printing.Texts.*
 
 
 class ReplPrinter(_ctx: Context) extends RefinedPrinter(_ctx) {
diff --git a/compiler/src/dotty/tools/dotc/printing/Showable.scala b/compiler/src/dotty/tools/dotc/printing/Showable.scala
index 9cd83ebad37e..3b4b0fda1d55 100644
--- a/compiler/src/dotty/tools/dotc/printing/Showable.scala
+++ b/compiler/src/dotty/tools/dotc/printing/Showable.scala
@@ -1,10 +1,10 @@
 package dotty.tools.dotc
 package printing
 
-import core._
-import Contexts._
-import Texts._
-import Decorators._
+import core.*
+import Contexts.*
+import Texts.*
+import Decorators.*
 import config.Config.summarizeDepth
 
 trait Showable extends Any {
diff --git a/compiler/src/dotty/tools/dotc/printing/SyntaxHighlighting.scala b/compiler/src/dotty/tools/dotc/printing/SyntaxHighlighting.scala
index 60e2388fad7c..913d433e0620 100644
--- a/compiler/src/dotty/tools/dotc/printing/SyntaxHighlighting.scala
+++ b/compiler/src/dotty/tools/dotc/printing/SyntaxHighlighting.scala
@@ -2,11 +2,11 @@ package dotty.tools.dotc
 package printing
 
 import dotty.tools.dotc.ast.untpd
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.StdNames._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.StdNames.*
 import dotty.tools.dotc.parsing.Parsers.Parser
 import dotty.tools.dotc.parsing.Scanners.Scanner
-import dotty.tools.dotc.parsing.Tokens._
+import dotty.tools.dotc.parsing.Tokens.*
 import dotty.tools.dotc.reporting.Reporter
 import dotty.tools.dotc.util.SourceFile
 import dotty.tools.dotc.util.Spans.Span
diff --git a/compiler/src/dotty/tools/dotc/profile/Profiler.scala b/compiler/src/dotty/tools/dotc/profile/Profiler.scala
index 1da9fc4e0299..0d1c169b212d 100644
--- a/compiler/src/dotty/tools/dotc/profile/Profiler.scala
+++ b/compiler/src/dotty/tools/dotc/profile/Profiler.scala
@@ -1,6 +1,6 @@
 package dotty.tools.dotc.profile
 
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.Phases.Phase
 import dotty.tools.io.AbstractFile
 
@@ -18,7 +18,7 @@ import javax.management.Notification
 import javax.management.NotificationEmitter
 import javax.management.NotificationListener
 import javax.management.openmbean.CompositeData
-import scala.annotation._
+import scala.annotation.*
 import scala.language.unsafeNulls
 
 import annotation.internal.sharable
diff --git a/compiler/src/dotty/tools/dotc/profile/ThreadPoolFactory.scala b/compiler/src/dotty/tools/dotc/profile/ThreadPoolFactory.scala
index 8b1c1435569c..a35da62dc954 100644
--- a/compiler/src/dotty/tools/dotc/profile/ThreadPoolFactory.scala
+++ b/compiler/src/dotty/tools/dotc/profile/ThreadPoolFactory.scala
@@ -1,10 +1,10 @@
 package dotty.tools.dotc.profile
 
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.Phases.Phase
 
+import java.util.concurrent.*
 import java.util.concurrent.ThreadPoolExecutor.AbortPolicy
-import java.util.concurrent._
 import java.util.concurrent.atomic.AtomicInteger
 import scala.language.unsafeNulls
 
diff --git a/compiler/src/dotty/tools/dotc/quoted/Interpreter.scala b/compiler/src/dotty/tools/dotc/quoted/Interpreter.scala
index 32870c0a4b69..071d85ab3732 100644
--- a/compiler/src/dotty/tools/dotc/quoted/Interpreter.scala
+++ b/compiler/src/dotty/tools/dotc/quoted/Interpreter.scala
@@ -3,20 +3,20 @@ package quoted
 
 import dotty.tools.dotc.ast.TreeMapWithImplicits
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core.Annotations._
-import dotty.tools.dotc.core.Constants._
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Annotations.*
+import dotty.tools.dotc.core.Constants.*
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.CyclicReference
-import dotty.tools.dotc.core.Decorators._
+import dotty.tools.dotc.core.Decorators.*
 import dotty.tools.dotc.core.Denotations.staticRef
-import dotty.tools.dotc.core.Flags._
+import dotty.tools.dotc.core.Flags.*
 import dotty.tools.dotc.core.NameKinds.FlatName
-import dotty.tools.dotc.core.Names._
-import dotty.tools.dotc.core.StdNames._
-import dotty.tools.dotc.core.Symbols._
+import dotty.tools.dotc.core.Names.*
+import dotty.tools.dotc.core.StdNames.*
+import dotty.tools.dotc.core.Symbols.*
 import dotty.tools.dotc.core.TypeErasure
-import dotty.tools.dotc.core.Types._
-import dotty.tools.dotc.quoted._
+import dotty.tools.dotc.core.Types.*
+import dotty.tools.dotc.quoted.*
 import dotty.tools.dotc.reporting.Message
 import dotty.tools.dotc.typer.ImportInfo.withRootImports
 import dotty.tools.dotc.util.SrcPos
@@ -25,7 +25,7 @@ import dotty.tools.repl.AbstractFileClassLoader
 import java.io.PrintWriter
 import java.io.StringWriter
 import java.lang.reflect.InvocationTargetException
-import java.lang.reflect.{Method => JLRMethod}
+import java.lang.reflect.Method as JLRMethod
 import scala.collection.mutable
 import scala.language.unsafeNulls
 import scala.reflect.ClassTag
diff --git a/compiler/src/dotty/tools/dotc/quoted/MacroExpansion.scala b/compiler/src/dotty/tools/dotc/quoted/MacroExpansion.scala
index b8048b1ba47a..aeb14f056a5c 100644
--- a/compiler/src/dotty/tools/dotc/quoted/MacroExpansion.scala
+++ b/compiler/src/dotty/tools/dotc/quoted/MacroExpansion.scala
@@ -1,7 +1,7 @@
 package dotty.tools.dotc.quoted
 
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.typer.Typer
 import dotty.tools.dotc.util.Property
 import dotty.tools.dotc.util.SourcePosition
diff --git a/compiler/src/dotty/tools/dotc/quoted/PickledQuotes.scala b/compiler/src/dotty/tools/dotc/quoted/PickledQuotes.scala
index d82d06c5d5c2..fa2eea44a972 100644
--- a/compiler/src/dotty/tools/dotc/quoted/PickledQuotes.scala
+++ b/compiler/src/dotty/tools/dotc/quoted/PickledQuotes.scala
@@ -1,15 +1,15 @@
 package dotty.tools.dotc.quoted
 
 import dotty.tools.dotc.ast.TreeTypeMap
-import dotty.tools.dotc.ast.Trees._
+import dotty.tools.dotc.ast.Trees.*
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.config.Printers._
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Decorators._
-import dotty.tools.dotc.core.Flags._
+import dotty.tools.dotc.config.Printers.*
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Decorators.*
+import dotty.tools.dotc.core.Flags.*
 import dotty.tools.dotc.core.Mode
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.core.Types._
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.core.Types.*
 import dotty.tools.dotc.core.tasty.Attributes
 import dotty.tools.dotc.core.tasty.DottyUnpickler
 import dotty.tools.dotc.core.tasty.PositionPickler
@@ -23,9 +23,9 @@ import dotty.tools.io.NoAbstractFile
 
 import scala.collection.mutable
 import scala.quoted.Quotes
-import scala.quoted.runtime.impl._
+import scala.quoted.runtime.impl.*
 
-import QuoteUtils._
+import QuoteUtils.*
 
 object PickledQuotes {
   import tpd.*
diff --git a/compiler/src/dotty/tools/dotc/quoted/QuotePatterns.scala b/compiler/src/dotty/tools/dotc/quoted/QuotePatterns.scala
index 4248dd6a83a2..22133799c9fd 100644
--- a/compiler/src/dotty/tools/dotc/quoted/QuotePatterns.scala
+++ b/compiler/src/dotty/tools/dotc/quoted/QuotePatterns.scala
@@ -2,21 +2,21 @@ package dotty.tools.dotc
 package quoted
 
 import dotty.tools.dotc.ast.TreeTypeMap
-import dotty.tools.dotc.ast.Trees._
+import dotty.tools.dotc.ast.Trees.*
 import dotty.tools.dotc.ast.tpd
 import dotty.tools.dotc.ast.untpd
-import dotty.tools.dotc.core.Annotations._
-import dotty.tools.dotc.core.Constants._
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Decorators._
-import dotty.tools.dotc.core.Flags._
+import dotty.tools.dotc.core.*
+import dotty.tools.dotc.core.Annotations.*
+import dotty.tools.dotc.core.Constants.*
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Decorators.*
+import dotty.tools.dotc.core.Flags.*
 import dotty.tools.dotc.core.NameKinds.PatMatGivenVarName
-import dotty.tools.dotc.core.Names._
-import dotty.tools.dotc.core.StdNames._
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.core.TypeOps._
-import dotty.tools.dotc.core.Types._
-import dotty.tools.dotc.core._
+import dotty.tools.dotc.core.Names.*
+import dotty.tools.dotc.core.StdNames.*
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.core.TypeOps.*
+import dotty.tools.dotc.core.Types.*
 import dotty.tools.dotc.reporting.IllegalVariableInPatternAlternative
 
 import scala.collection.mutable
diff --git a/compiler/src/dotty/tools/dotc/quoted/QuoteUtils.scala b/compiler/src/dotty/tools/dotc/quoted/QuoteUtils.scala
index 29b0d6004328..a015c726c59f 100644
--- a/compiler/src/dotty/tools/dotc/quoted/QuoteUtils.scala
+++ b/compiler/src/dotty/tools/dotc/quoted/QuoteUtils.scala
@@ -1,8 +1,8 @@
 package dotty.tools.dotc.quoted
 
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Symbols._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Symbols.*
 
 object QuoteUtils:
   import tpd.*
diff --git a/compiler/src/dotty/tools/dotc/quoted/QuotesCache.scala b/compiler/src/dotty/tools/dotc/quoted/QuotesCache.scala
index 39ade04437c3..67b1bfe3b58a 100644
--- a/compiler/src/dotty/tools/dotc/quoted/QuotesCache.scala
+++ b/compiler/src/dotty/tools/dotc/quoted/QuotesCache.scala
@@ -1,7 +1,7 @@
 package dotty.tools.dotc.quoted
 
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.util.Property
 
 
diff --git a/compiler/src/dotty/tools/dotc/quoted/reflect/FromSymbol.scala b/compiler/src/dotty/tools/dotc/quoted/reflect/FromSymbol.scala
index 87d0cbb7be08..cfc09a8ed836 100644
--- a/compiler/src/dotty/tools/dotc/quoted/reflect/FromSymbol.scala
+++ b/compiler/src/dotty/tools/dotc/quoted/reflect/FromSymbol.scala
@@ -3,11 +3,11 @@ package reflect
 
 import dotty.tools.dotc.ast.tpd
 import dotty.tools.dotc.ast.untpd
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Flags._
-import dotty.tools.dotc.core.StdNames._
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.core.Types._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Flags.*
+import dotty.tools.dotc.core.StdNames.*
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.core.Types.*
 
 object FromSymbol {
 
diff --git a/compiler/src/dotty/tools/dotc/report.scala b/compiler/src/dotty/tools/dotc/report.scala
index f31b8cc9a75a..33424a575ad9 100644
--- a/compiler/src/dotty/tools/dotc/report.scala
+++ b/compiler/src/dotty/tools/dotc/report.scala
@@ -4,16 +4,16 @@ import dotty.tools.dotc.config.MigrationVersion
 
 import java.lang.System.currentTimeMillis
 
-import reporting._
-import Diagnostic._
+import reporting.*
+import Diagnostic.*
 import util.{SourcePosition, NoSourcePosition, SrcPos}
-import core._
-import Contexts._
-import Flags._
-import Symbols._
-import Decorators._
+import core.*
+import Contexts.*
+import Flags.*
+import Symbols.*
+import Decorators.*
 import config.SourceVersion
-import ast._
+import ast.*
 import config.Feature.sourceVersion
 
 object report:
diff --git a/compiler/src/dotty/tools/dotc/reporting/ConsoleReporter.scala b/compiler/src/dotty/tools/dotc/reporting/ConsoleReporter.scala
index ea8b9f95b4df..fa1aa936fdaa 100644
--- a/compiler/src/dotty/tools/dotc/reporting/ConsoleReporter.scala
+++ b/compiler/src/dotty/tools/dotc/reporting/ConsoleReporter.scala
@@ -5,7 +5,7 @@ package reporting
 import java.io.BufferedReader
 import java.io.PrintWriter
 
-import core.Contexts._
+import core.Contexts.*
 import Diagnostic.Error
 
 /**
diff --git a/compiler/src/dotty/tools/dotc/reporting/Diagnostic.scala b/compiler/src/dotty/tools/dotc/reporting/Diagnostic.scala
index 3eac2cef1f11..727d00ddefc3 100644
--- a/compiler/src/dotty/tools/dotc/reporting/Diagnostic.scala
+++ b/compiler/src/dotty/tools/dotc/reporting/Diagnostic.scala
@@ -3,17 +3,17 @@ package dotc
 package reporting
 
 import dotty.tools.dotc.config.Settings.Setting
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.interfaces.Diagnostic.ERROR
 import dotty.tools.dotc.interfaces.Diagnostic.INFO
 import dotty.tools.dotc.interfaces.Diagnostic.WARNING
 import dotty.tools.dotc.util.SourcePosition
 
 import java.util.Collections
+import java.util.List as JList
 import java.util.Optional
-import java.util.{List => JList}
 import scala.language.unsafeNulls
-import scala.util.chaining._
+import scala.util.chaining.*
 
 import core.Decorators.toMessage
 
diff --git a/compiler/src/dotty/tools/dotc/reporting/DidYouMean.scala b/compiler/src/dotty/tools/dotc/reporting/DidYouMean.scala
index cdaf9b2fbc87..9b38700aa67c 100644
--- a/compiler/src/dotty/tools/dotc/reporting/DidYouMean.scala
+++ b/compiler/src/dotty/tools/dotc/reporting/DidYouMean.scala
@@ -2,13 +2,13 @@ package dotty.tools
 package dotc
 package reporting
 
-import core._
-import Contexts._
-import Decorators._
-import Symbols._
-import Names._
-import Types._
-import Flags._
+import core.*
+import Contexts.*
+import Decorators.*
+import Symbols.*
+import Names.*
+import Types.*
+import Flags.*
 import typer.ProtoTypes.{FunProto, SelectionProto}
 
 /** A utility object to support "did you mean" hinting */
diff --git a/compiler/src/dotty/tools/dotc/reporting/ExploringReporter.scala b/compiler/src/dotty/tools/dotc/reporting/ExploringReporter.scala
index a2062bd1b2c7..f469c03764c0 100644
--- a/compiler/src/dotty/tools/dotc/reporting/ExploringReporter.scala
+++ b/compiler/src/dotty/tools/dotc/reporting/ExploringReporter.scala
@@ -6,7 +6,7 @@ import scala.language.unsafeNulls
 
 import collection.mutable
 import core.Contexts.Context
-import Diagnostic._
+import Diagnostic.*
 
 /** A re-usable Reporter used in Contexts#test */
 class ExploringReporter extends StoreReporter(null, fromTyperState = false):
diff --git a/compiler/src/dotty/tools/dotc/reporting/HideNonSensicalMessages.scala b/compiler/src/dotty/tools/dotc/reporting/HideNonSensicalMessages.scala
index 74cc6b99d2e6..81e17c495d90 100644
--- a/compiler/src/dotty/tools/dotc/reporting/HideNonSensicalMessages.scala
+++ b/compiler/src/dotty/tools/dotc/reporting/HideNonSensicalMessages.scala
@@ -2,7 +2,7 @@ package dotty.tools
 package dotc
 package reporting
 
-import core.Contexts._
+import core.Contexts.*
 
 /**
  * This trait implements `isHidden` so that we avoid reporting non-sensical messages.
diff --git a/compiler/src/dotty/tools/dotc/reporting/Message.scala b/compiler/src/dotty/tools/dotc/reporting/Message.scala
index 42b9bc976eeb..51f975e5d8b9 100644
--- a/compiler/src/dotty/tools/dotc/reporting/Message.scala
+++ b/compiler/src/dotty/tools/dotc/reporting/Message.scala
@@ -5,12 +5,12 @@ package reporting
 import scala.annotation.threadUnsafe
 import scala.language.unsafeNulls
 
-import core._
-import Contexts._
-import Decorators._
-import Symbols._
-import Types._
-import Flags._
+import core.*
+import Contexts.*
+import Decorators.*
+import Symbols.*
+import Types.*
+import Flags.*
 import printing.{RefinedPrinter, MessageLimiter, ErrorMessageLimiter}
 import printing.Texts.Text
 import printing.Formatting.hl
diff --git a/compiler/src/dotty/tools/dotc/reporting/MessageRendering.scala b/compiler/src/dotty/tools/dotc/reporting/MessageRendering.scala
index 5e9e600c12de..a1bb6a2408a3 100644
--- a/compiler/src/dotty/tools/dotc/reporting/MessageRendering.scala
+++ b/compiler/src/dotty/tools/dotc/reporting/MessageRendering.scala
@@ -2,16 +2,16 @@ package dotty.tools
 package dotc
 package reporting
 
-import java.lang.System.{lineSeparator => EOL}
+import java.lang.System.lineSeparator as EOL
 import scala.annotation.switch
 import scala.collection.mutable
 import scala.language.unsafeNulls
 
-import core.Contexts._
-import core.Decorators._
+import core.Contexts.*
+import core.Decorators.*
 import printing.Highlighting.{Blue, Red, Yellow}
 import printing.SyntaxHighlighting
-import Diagnostic._
+import Diagnostic.*
 import util.{ SourcePosition, NoSourcePosition }
 import util.Chars.{ LF, CR, FF, SU }
 
diff --git a/compiler/src/dotty/tools/dotc/reporting/Profile.scala b/compiler/src/dotty/tools/dotc/reporting/Profile.scala
index 1f8afc888938..6e2f83364dbe 100644
--- a/compiler/src/dotty/tools/dotc/reporting/Profile.scala
+++ b/compiler/src/dotty/tools/dotc/reporting/Profile.scala
@@ -2,7 +2,7 @@ package dotty.tools
 package dotc
 package reporting
 
-import core._
+import core.*
 import Contexts.{Context, ctx}
 import Symbols.{Symbol, NoSymbol}
 import collection.mutable
diff --git a/compiler/src/dotty/tools/dotc/reporting/Reporter.scala b/compiler/src/dotty/tools/dotc/reporting/Reporter.scala
index c7a4123976ca..fe145dcf3ec7 100644
--- a/compiler/src/dotty/tools/dotc/reporting/Reporter.scala
+++ b/compiler/src/dotty/tools/dotc/reporting/Reporter.scala
@@ -2,12 +2,12 @@ package dotty.tools
 package dotc
 package reporting
 
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.Mode
 import dotty.tools.dotc.core.Symbols.NoSymbol
 import dotty.tools.dotc.core.Symbols.Symbol
-import dotty.tools.dotc.reporting.Diagnostic._
-import dotty.tools.dotc.reporting.Message._
+import dotty.tools.dotc.reporting.Diagnostic.*
+import dotty.tools.dotc.reporting.Message.*
 import dotty.tools.dotc.util.NoSourcePosition
 
 import java.io.BufferedReader
diff --git a/compiler/src/dotty/tools/dotc/reporting/StoreReporter.scala b/compiler/src/dotty/tools/dotc/reporting/StoreReporter.scala
index 9783a3208a60..aef5f2c5863b 100644
--- a/compiler/src/dotty/tools/dotc/reporting/StoreReporter.scala
+++ b/compiler/src/dotty/tools/dotc/reporting/StoreReporter.scala
@@ -2,10 +2,10 @@ package dotty.tools
 package dotc
 package reporting
 
-import core.Contexts._
+import core.Contexts.*
 import collection.mutable
 import config.Printers.typr
-import Diagnostic._
+import Diagnostic.*
 
 /** This class implements a Reporter that stores all messages
   *
diff --git a/compiler/src/dotty/tools/dotc/reporting/TestReporter.scala b/compiler/src/dotty/tools/dotc/reporting/TestReporter.scala
index 8d7204a93fa2..c0b5ffe8e650 100644
--- a/compiler/src/dotty/tools/dotc/reporting/TestReporter.scala
+++ b/compiler/src/dotty/tools/dotc/reporting/TestReporter.scala
@@ -5,7 +5,7 @@ package reporting
 import scala.language.unsafeNulls
 
 import collection.mutable
-import Diagnostic._
+import Diagnostic.*
 
 /** A re-usable Reporter used in Contexts#test */
 class TestingReporter extends StoreReporter(null, fromTyperState = false):
diff --git a/compiler/src/dotty/tools/dotc/reporting/ThrowingReporter.scala b/compiler/src/dotty/tools/dotc/reporting/ThrowingReporter.scala
index 153212522541..75c698a28ee4 100644
--- a/compiler/src/dotty/tools/dotc/reporting/ThrowingReporter.scala
+++ b/compiler/src/dotty/tools/dotc/reporting/ThrowingReporter.scala
@@ -2,7 +2,7 @@ package dotty.tools
 package dotc
 package reporting
 
-import core.Contexts._
+import core.Contexts.*
 import Diagnostic.Error
 
 /**
diff --git a/compiler/src/dotty/tools/dotc/reporting/UniqueMessagePositions.scala b/compiler/src/dotty/tools/dotc/reporting/UniqueMessagePositions.scala
index 7db85c4c015b..7eee08d4de3a 100644
--- a/compiler/src/dotty/tools/dotc/reporting/UniqueMessagePositions.scala
+++ b/compiler/src/dotty/tools/dotc/reporting/UniqueMessagePositions.scala
@@ -5,7 +5,7 @@ package reporting
 import scala.collection.mutable
 
 import util.SourceFile
-import core.Contexts._
+import core.Contexts.*
 
 /** This trait implements `isHidden` so that multiple messages per position
   * are suppressed, unless they are of increasing severity. */
diff --git a/compiler/src/dotty/tools/dotc/reporting/WConf.scala b/compiler/src/dotty/tools/dotc/reporting/WConf.scala
index 4447c74f842d..ea129a4b9c0c 100644
--- a/compiler/src/dotty/tools/dotc/reporting/WConf.scala
+++ b/compiler/src/dotty/tools/dotc/reporting/WConf.scala
@@ -2,7 +2,7 @@ package dotty.tools
 package dotc
 package reporting
 
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.util.SourcePosition
 
 import java.util.regex.PatternSyntaxException
diff --git a/compiler/src/dotty/tools/dotc/reporting/messages.scala b/compiler/src/dotty/tools/dotc/reporting/messages.scala
index 569862ac3146..29fc64e302ed 100644
--- a/compiler/src/dotty/tools/dotc/reporting/messages.scala
+++ b/compiler/src/dotty/tools/dotc/reporting/messages.scala
@@ -8,40 +8,40 @@ import dotty.tools.dotc.util.SourcePosition
 import dotty.tools.dotc.util.Spans.Span
 
 import java.util.regex.Matcher.quoteReplacement
-import scala.jdk.CollectionConverters._
+import scala.jdk.CollectionConverters.*
 import scala.util.control.NonFatal
 import scala.util.matching.Regex
 
-import core._
-import Contexts._
-import Decorators._
-import Symbols._
-import Names._
-import NameOps._
-import Types._
-import Flags._
-import Phases._
+import core.*
+import Contexts.*
+import Decorators.*
+import Symbols.*
+import Names.*
+import NameOps.*
+import Types.*
+import Flags.*
+import Phases.*
 import Denotations.SingleDenotation
 import SymDenotations.SymDenotation
 import NameKinds.{WildcardParamName, ContextFunctionParamName}
 import parsing.Scanners.Token
 import parsing.Tokens
-import printing.Highlighting._
+import printing.Highlighting.*
 import printing.Formatting
-import ErrorMessageID._
+import ErrorMessageID.*
 import ast.Trees
 import config.{Feature, ScalaVersion}
 import typer.ErrorReporting.{err, matchReductionAddendum, substitutableTypeSymbolsInScope}
 import typer.ProtoTypes.{ViewProto, SelectionProto, FunProto}
-import typer.Implicits._
+import typer.Implicits.*
 import typer.Inferencing
 import StdNames.nme
 import printing.Formatting.hl
-import ast.Trees._
+import ast.Trees.*
 import ast.untpd
 import ast.tpd
 import cc.CaptureSet.IdentityCaptRefMap
-import DidYouMean._
+import DidYouMean.*
 
 /**  Messages
   *  ========
diff --git a/compiler/src/dotty/tools/dotc/reporting/trace.scala b/compiler/src/dotty/tools/dotc/reporting/trace.scala
index f0399a8b8d8e..d359e2034a94 100644
--- a/compiler/src/dotty/tools/dotc/reporting/trace.scala
+++ b/compiler/src/dotty/tools/dotc/reporting/trace.scala
@@ -2,14 +2,14 @@ package dotty.tools
 package dotc
 package reporting
 
-import scala.compiletime._
+import scala.compiletime.*
 import scala.language.unsafeNulls
 
-import core._
-import Contexts._
-import Decorators._
-import config._
-import printing.Formatting._
+import core.*
+import Contexts.*
+import Decorators.*
+import config.*
+import printing.Formatting.*
 
 /** Exposes the {{{ trace("question") { op } }}} syntax.
  *
diff --git a/compiler/src/dotty/tools/dotc/rewrites/Rewrites.scala b/compiler/src/dotty/tools/dotc/rewrites/Rewrites.scala
index 3b39ca142fce..817e541d21e0 100644
--- a/compiler/src/dotty/tools/dotc/rewrites/Rewrites.scala
+++ b/compiler/src/dotty/tools/dotc/rewrites/Rewrites.scala
@@ -11,7 +11,7 @@ import scala.annotation.tailrec
 
 import util.{SourceFile, Spans}
 import Spans.Span
-import core.Contexts._
+import core.Contexts.*
 import collection.mutable
 
 /** Handles rewriting of Scala2 files to Dotty */
diff --git a/compiler/src/dotty/tools/dotc/sbt/APIUtils.scala b/compiler/src/dotty/tools/dotc/sbt/APIUtils.scala
index c64a425c3ba4..080ba27ce8aa 100644
--- a/compiler/src/dotty/tools/dotc/sbt/APIUtils.scala
+++ b/compiler/src/dotty/tools/dotc/sbt/APIUtils.scala
@@ -6,11 +6,11 @@ import xsbti.api.SafeLazy.strict
 
 import scala.language.unsafeNulls
 
-import core._
-import Contexts._
-import Flags._
-import Symbols._
-import NameOps._
+import core.*
+import Contexts.*
+import Flags.*
+import Symbols.*
+import NameOps.*
 
 /** Utilities to deal with xsbti.api.
  *
diff --git a/compiler/src/dotty/tools/dotc/sbt/ExtractAPI.scala b/compiler/src/dotty/tools/dotc/sbt/ExtractAPI.scala
index 5c0ade9ba048..3c14c19e0a2e 100644
--- a/compiler/src/dotty/tools/dotc/sbt/ExtractAPI.scala
+++ b/compiler/src/dotty/tools/dotc/sbt/ExtractAPI.scala
@@ -6,22 +6,22 @@ import dotty.tools.io.File
 import java.io.PrintWriter
 import scala.collection.mutable
 import scala.language.unsafeNulls
-import scala.util.chaining._
+import scala.util.chaining.*
 import scala.util.hashing.MurmurHash3
 
 import ExtractDependencies.internalError
 import ast.{Positioned, Trees, tpd}
-import core._
-import core.Decorators._
-import Annotations._
-import Contexts._
-import Flags._
-import Phases._
-import Trees._
-import Types._
-import Symbols._
-import Names._
-import NameOps._
+import core.*
+import core.Decorators.*
+import Annotations.*
+import Contexts.*
+import Flags.*
+import Phases.*
+import Trees.*
+import Types.*
+import Symbols.*
+import Names.*
+import NameOps.*
 import inlines.Inlines
 import transform.ValueClasses
 
diff --git a/compiler/src/dotty/tools/dotc/sbt/ExtractDependencies.scala b/compiler/src/dotty/tools/dotc/sbt/ExtractDependencies.scala
index bbe4d120858e..bc739f878498 100644
--- a/compiler/src/dotty/tools/dotc/sbt/ExtractDependencies.scala
+++ b/compiler/src/dotty/tools/dotc/sbt/ExtractDependencies.scala
@@ -5,15 +5,15 @@ import dotty.tools.dotc.ast.tpd
 import dotty.tools.dotc.classpath.FileUtils.hasClassExtension
 import dotty.tools.dotc.classpath.FileUtils.hasTastyExtension
 import dotty.tools.dotc.classpath.FileUtils.isTasty
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Decorators._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Decorators.*
 import dotty.tools.dotc.core.Denotations.StaleSymbol
-import dotty.tools.dotc.core.Flags._
-import dotty.tools.dotc.core.NameOps._
-import dotty.tools.dotc.core.Names._
-import dotty.tools.dotc.core.Phases._
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.core.Types._
+import dotty.tools.dotc.core.Flags.*
+import dotty.tools.dotc.core.NameOps.*
+import dotty.tools.dotc.core.Names.*
+import dotty.tools.dotc.core.Phases.*
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.core.Types.*
 import dotty.tools.dotc.util.NoSourcePosition
 import dotty.tools.dotc.util.SrcPos
 import dotty.tools.io
@@ -23,7 +23,7 @@ import dotty.tools.io.PlainFile
 import dotty.tools.io.ZipArchive
 import xsbti.UseScope
 import xsbti.api.DependencyContext
-import xsbti.api.DependencyContext._
+import xsbti.api.DependencyContext.*
 
 import java.io.File
 import java.nio.file.Path
@@ -32,7 +32,7 @@ import java.util.EnumSet
 import scala.collection.Set
 import scala.collection.mutable
 import scala.compiletime.uninitialized
-import scala.jdk.CollectionConverters._
+import scala.jdk.CollectionConverters.*
 import scala.language.unsafeNulls
 
 /** This phase sends information on classes' dependencies to sbt via callbacks.
diff --git a/compiler/src/dotty/tools/dotc/sbt/ShowAPI.scala b/compiler/src/dotty/tools/dotc/sbt/ShowAPI.scala
index c18bc2ff1feb..9e2cd2ceca40 100644
--- a/compiler/src/dotty/tools/dotc/sbt/ShowAPI.scala
+++ b/compiler/src/dotty/tools/dotc/sbt/ShowAPI.scala
@@ -9,7 +9,7 @@
 package dotty.tools.dotc
 package sbt
 
-import xsbti.api._
+import xsbti.api.*
 
 import scala.language.unsafeNulls
 import scala.util.Try
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/ConstantOps.scala b/compiler/src/dotty/tools/dotc/semanticdb/ConstantOps.scala
index 975d5480fe9b..c10767c6073c 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/ConstantOps.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/ConstantOps.scala
@@ -2,10 +2,10 @@ package dotty.tools
 package dotc
 package semanticdb
 
-import dotty.tools.dotc.{semanticdb => s}
+import dotty.tools.dotc.semanticdb as s
 
 import core.Contexts.Context
-import core.Constants._
+import core.Constants.*
 
 object ConstantOps:
   extension (const: Constant)
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/Descriptor.scala b/compiler/src/dotty/tools/dotc/semanticdb/Descriptor.scala
index d33afd1bd6a8..b86932797c8e 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/Descriptor.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/Descriptor.scala
@@ -1,8 +1,8 @@
 package dotty.tools.dotc.semanticdb
 
-import dotty.tools.dotc.semanticdb.{Descriptor => d}
+import dotty.tools.dotc.semanticdb.Descriptor as d
 
-import java.lang.System.{lineSeparator => EOL}
+import java.lang.System.lineSeparator as EOL
 import scala.language.unsafeNulls
 
 class DescriptorParser(s: String) {
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/DiagnosticOps.scala b/compiler/src/dotty/tools/dotc/semanticdb/DiagnosticOps.scala
index 6096b57214a3..b8e9515a17d3 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/DiagnosticOps.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/DiagnosticOps.scala
@@ -5,7 +5,7 @@ import dotty.tools.dotc.interfaces.Diagnostic.ERROR
 import dotty.tools.dotc.interfaces.Diagnostic.INFO
 import dotty.tools.dotc.interfaces.Diagnostic.WARNING
 import dotty.tools.dotc.reporting.Diagnostic
-import dotty.tools.dotc.{semanticdb => s}
+import dotty.tools.dotc.semanticdb as s
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/ExtractSemanticDB.scala b/compiler/src/dotty/tools/dotc/semanticdb/ExtractSemanticDB.scala
index 0bc7684db577..7dbcc44bb9a6 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/ExtractSemanticDB.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/ExtractSemanticDB.scala
@@ -3,32 +3,32 @@ package dotc
 package semanticdb
 
 import dotty.tools.dotc.reporting.Diagnostic.Warning
-import dotty.tools.dotc.semanticdb.DiagnosticOps._
-import dotty.tools.dotc.{semanticdb => s}
+import dotty.tools.dotc.semanticdb as s
+import dotty.tools.dotc.semanticdb.DiagnosticOps.*
 import dotty.tools.io.AbstractFile
 import dotty.tools.io.JarArchive
 
 import java.nio.file.Path
 import scala.PartialFunction.condOpt
 import scala.annotation.tailrec
-import scala.annotation.{threadUnsafe => tu}
+import scala.annotation.threadUnsafe as tu
 import scala.collection.mutable
-import scala.jdk.CollectionConverters._
+import scala.jdk.CollectionConverters.*
 import scala.language.unsafeNulls
 import scala.util.Failure
 import scala.util.Success
 import scala.util.Using
 
-import core._
-import Phases._
-import ast.tpd._
+import core.*
+import Phases.*
+import ast.tpd.*
 import ast.Trees.{mods, WithEndMarker}
-import Contexts._
-import Symbols._
-import Flags._
+import Contexts.*
+import Symbols.*
+import Flags.*
 import Names.Name
 import StdNames.nme
-import NameOps._
+import NameOps.*
 import Denotations.StaleSymbol
 import util.Spans.Span
 import util.SourceFile
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/PPrint.scala b/compiler/src/dotty/tools/dotc/semanticdb/PPrint.scala
index 2e2932b0556f..8e6ce1f7bae1 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/PPrint.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/PPrint.scala
@@ -1,12 +1,12 @@
 package dotty.tools.dotc.semanticdb
 
+import dotty.tools.dotc.semanticdb as s
 import dotty.tools.dotc.semanticdb.Scala3.given
 import dotty.tools.dotc.util.SourceFile
-import dotty.tools.dotc.{semanticdb => s}
 
 import scala.collection.mutable
 
-import SymbolInformation.Kind._
+import SymbolInformation.Kind.*
 class SymbolInformationPrinter (symtab: PrinterSymtab):
   val notes = InfoNotes()
   val infoPrinter = InfoPrinter(notes)
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/Scala3.scala b/compiler/src/dotty/tools/dotc/semanticdb/Scala3.scala
index 3b3746e342cc..fc0d0485902c 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/Scala3.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/Scala3.scala
@@ -11,14 +11,14 @@ import scala.annotation.internal.sharable
 import scala.annotation.switch
 
 import core.Symbols.{ Symbol , defn, NoSymbol }
-import core.Contexts._
+import core.Contexts.*
 import core.Names
 import core.Names.Name
 import core.Types.{Type, TypeBounds}
-import core.Flags._
+import core.Flags.*
 import core.NameKinds
 import core.StdNames.nme
-import SymbolInformation.{Kind => k}
+import SymbolInformation.Kind as k
 
 object Scala3:
   import Symbols.*
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/SemanticSymbolBuilder.scala b/compiler/src/dotty/tools/dotc/semanticdb/SemanticSymbolBuilder.scala
index 7bcc8dd94987..56c03892fe50 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/SemanticSymbolBuilder.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/SemanticSymbolBuilder.scala
@@ -5,10 +5,10 @@ package semanticdb
 import scala.annotation.tailrec
 import scala.collection.mutable
 
-import core._
-import Contexts._
-import Symbols._
-import Flags._
+import core.*
+import Contexts.*
+import Symbols.*
+import Flags.*
 import Names.Name
 
 class SemanticSymbolBuilder:
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/SyntheticsExtractor.scala b/compiler/src/dotty/tools/dotc/semanticdb/SyntheticsExtractor.scala
index 83e120518091..8bd5306d9d5e 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/SyntheticsExtractor.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/SyntheticsExtractor.scala
@@ -1,11 +1,11 @@
 package dotty.tools.dotc.semanticdb
 
-import dotty.tools.dotc.ast.tpd._
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Flags._
+import dotty.tools.dotc.ast.tpd.*
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Flags.*
 import dotty.tools.dotc.core.NameKinds
 import dotty.tools.dotc.core.StdNames.nme
-import dotty.tools.dotc.{semanticdb => s}
+import dotty.tools.dotc.semanticdb as s
 
 
 class SyntheticsExtractor:
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/Tools.scala b/compiler/src/dotty/tools/dotc/semanticdb/Tools.scala
index 8c0f1f4000fb..ef69ed3c7241 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/Tools.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/Tools.scala
@@ -4,8 +4,8 @@ import dotty.tools.dotc.semanticdb.Scala3.given
 import dotty.tools.dotc.util.SourceFile
 
 import java.nio.charset.StandardCharsets
-import java.nio.file._
-import scala.jdk.CollectionConverters._
+import java.nio.file.*
+import scala.jdk.CollectionConverters.*
 
 object Tools:
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/TypeOps.scala b/compiler/src/dotty/tools/dotc/semanticdb/TypeOps.scala
index ae2b8b860945..558bf13f626e 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/TypeOps.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/TypeOps.scala
@@ -3,13 +3,13 @@ package dotc
 package semanticdb
 
 import dotty.tools.dotc.core.Names.Designator
-import dotty.tools.dotc.{semanticdb => s}
+import dotty.tools.dotc.semanticdb as s
 
 import scala.util.chaining.scalaUtilChainingOps
 
-import core.Symbols._
+import core.Symbols.*
 import core.Contexts.Context
-import core.Types._
+import core.Types.*
 import core.Annotations.Annotation
 import core.Flags
 import core.Names.Name
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/Access.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/Access.scala
index 2aacef9a5855..f8a0ecf72670 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/Access.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/Access.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/Annotation.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/Annotation.scala
index 33b8ed8be424..303da6a16ccd 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/Annotation.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/Annotation.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/Constant.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/Constant.scala
index f9a640ebabae..6bb20066bf18 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/Constant.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/Constant.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/Diagnostic.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/Diagnostic.scala
index 4b09032c1a4d..cc100f67c2c3 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/Diagnostic.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/Diagnostic.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/Documentation.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/Documentation.scala
index f645694b4c56..1e3874a25636 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/Documentation.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/Documentation.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/Language.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/Language.scala
index 5bd35ec3dbf0..016d8dab39e3 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/Language.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/Language.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/Location.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/Location.scala
index 7a26dd30aca0..5f3a22229511 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/Location.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/Location.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/Range.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/Range.scala
index bb1af9a81ba0..e1b03b90ab15 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/Range.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/Range.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/Schema.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/Schema.scala
index 707604ffd221..5605f092ffd8 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/Schema.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/Schema.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/Scope.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/Scope.scala
index 0026f3f5883c..89006d85b43f 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/Scope.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/Scope.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/Signature.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/Signature.scala
index 06b425a36ff1..939feee675ec 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/Signature.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/Signature.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/SymbolInformation.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/SymbolInformation.scala
index b7886ed1d911..7458a989e112 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/SymbolInformation.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/SymbolInformation.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/SymbolOccurrence.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/SymbolOccurrence.scala
index 849d905152ca..1e12f252c5d0 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/SymbolOccurrence.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/SymbolOccurrence.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/Synthetic.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/Synthetic.scala
index c81c567fb9d7..c1855967dfb9 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/Synthetic.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/Synthetic.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/TextDocument.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/TextDocument.scala
index 060768344a87..33a97c33ecc1 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/TextDocument.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/TextDocument.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/TextDocuments.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/TextDocuments.scala
index 43024c6a31b9..b44a27037ef5 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/TextDocuments.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/TextDocuments.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/Tree.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/Tree.scala
index e55ee2ab9445..738521b3cf6a 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/Tree.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/Tree.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/generated/Type.scala b/compiler/src/dotty/tools/dotc/semanticdb/generated/Type.scala
index 22c1d6f11b3d..ce029733e917 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/generated/Type.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/generated/Type.scala
@@ -5,7 +5,7 @@
 // Protofile syntax: PROTO3
 
 package dotty.tools.dotc.semanticdb
-import dotty.tools.dotc.semanticdb.internal._
+import dotty.tools.dotc.semanticdb.internal.*
 
 import scala.annotation.internal.sharable
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/internal/SemanticdbInputStream.scala b/compiler/src/dotty/tools/dotc/semanticdb/internal/SemanticdbInputStream.scala
index f5134ef76f57..d282fa77cedd 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/internal/SemanticdbInputStream.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/internal/SemanticdbInputStream.scala
@@ -7,7 +7,7 @@ import java.util.Arrays
 import scala.collection.mutable
 import scala.language.unsafeNulls
 
-import SemanticdbInputStream._
+import SemanticdbInputStream.*
 
 object SemanticdbInputStream {
 
diff --git a/compiler/src/dotty/tools/dotc/semanticdb/internal/SemanticdbOutputStream.scala b/compiler/src/dotty/tools/dotc/semanticdb/internal/SemanticdbOutputStream.scala
index 4ab7a0565096..3216129b965a 100644
--- a/compiler/src/dotty/tools/dotc/semanticdb/internal/SemanticdbOutputStream.scala
+++ b/compiler/src/dotty/tools/dotc/semanticdb/internal/SemanticdbOutputStream.scala
@@ -6,7 +6,7 @@ import java.nio.ByteBuffer
 import java.nio.charset.StandardCharsets
 import scala.language.unsafeNulls
 
-import SemanticdbOutputStream._
+import SemanticdbOutputStream.*
 
 object SemanticdbOutputStream {
 
diff --git a/compiler/src/dotty/tools/dotc/staging/CrossStageSafety.scala b/compiler/src/dotty/tools/dotc/staging/CrossStageSafety.scala
index 284f93d1a7e8..265e618ef074 100644
--- a/compiler/src/dotty/tools/dotc/staging/CrossStageSafety.scala
+++ b/compiler/src/dotty/tools/dotc/staging/CrossStageSafety.scala
@@ -3,19 +3,19 @@ package staging
 
 import dotty.tools.dotc.ast.tpd
 import dotty.tools.dotc.ast.untpd
-import dotty.tools.dotc.core.Annotations._
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Decorators._
-import dotty.tools.dotc.core.Flags._
-import dotty.tools.dotc.core.NameKinds._
-import dotty.tools.dotc.core.StdNames._
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.core.Types._
+import dotty.tools.dotc.core.Annotations.*
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Decorators.*
+import dotty.tools.dotc.core.Flags.*
+import dotty.tools.dotc.core.NameKinds.*
+import dotty.tools.dotc.core.StdNames.*
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.core.Types.*
 import dotty.tools.dotc.quoted.QuotePatterns
-import dotty.tools.dotc.staging.QuoteTypeTags._
-import dotty.tools.dotc.staging.StagingLevel._
+import dotty.tools.dotc.staging.QuoteTypeTags.*
+import dotty.tools.dotc.staging.StagingLevel.*
 import dotty.tools.dotc.util.Property
-import dotty.tools.dotc.util.Spans._
+import dotty.tools.dotc.util.Spans.*
 import dotty.tools.dotc.util.SrcPos
 
 /** Checks that staging level consistency holds and heals staged types.
diff --git a/compiler/src/dotty/tools/dotc/staging/HealType.scala b/compiler/src/dotty/tools/dotc/staging/HealType.scala
index 829a980b7742..40fbce09c268 100644
--- a/compiler/src/dotty/tools/dotc/staging/HealType.scala
+++ b/compiler/src/dotty/tools/dotc/staging/HealType.scala
@@ -1,14 +1,14 @@
 package dotty.tools.dotc
 package staging
 
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Decorators._
-import dotty.tools.dotc.core.Flags._
-import dotty.tools.dotc.core.StdNames._
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.core.Types._
-import dotty.tools.dotc.staging.QuoteTypeTags._
-import dotty.tools.dotc.staging.StagingLevel._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Decorators.*
+import dotty.tools.dotc.core.Flags.*
+import dotty.tools.dotc.core.StdNames.*
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.core.Types.*
+import dotty.tools.dotc.staging.QuoteTypeTags.*
+import dotty.tools.dotc.staging.StagingLevel.*
 import dotty.tools.dotc.typer.Implicits.SearchFailureType
 import dotty.tools.dotc.util.SrcPos
 
diff --git a/compiler/src/dotty/tools/dotc/staging/QuoteTypeTags.scala b/compiler/src/dotty/tools/dotc/staging/QuoteTypeTags.scala
index c41e2629d278..467f1f440fd6 100644
--- a/compiler/src/dotty/tools/dotc/staging/QuoteTypeTags.scala
+++ b/compiler/src/dotty/tools/dotc/staging/QuoteTypeTags.scala
@@ -1,11 +1,11 @@
 package dotty.tools.dotc.staging
 
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Decorators._
-import dotty.tools.dotc.core.StdNames._
-import dotty.tools.dotc.core.Types._
-import dotty.tools.dotc.staging.StagingLevel._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Decorators.*
+import dotty.tools.dotc.core.StdNames.*
+import dotty.tools.dotc.core.Types.*
+import dotty.tools.dotc.staging.StagingLevel.*
 import dotty.tools.dotc.util.Property
 
 import scala.collection.mutable.LinkedHashSet
diff --git a/compiler/src/dotty/tools/dotc/staging/StagingLevel.scala b/compiler/src/dotty/tools/dotc/staging/StagingLevel.scala
index 05b3efab408c..0a229881804e 100644
--- a/compiler/src/dotty/tools/dotc/staging/StagingLevel.scala
+++ b/compiler/src/dotty/tools/dotc/staging/StagingLevel.scala
@@ -1,11 +1,11 @@
 package dotty.tools.dotc
 package staging
 
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Decorators._
-import dotty.tools.dotc.core.Flags._
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.core.Types._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Decorators.*
+import dotty.tools.dotc.core.Flags.*
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.core.Types.*
 import dotty.tools.dotc.util.Property
 import dotty.tools.dotc.util.SrcPos
 
diff --git a/compiler/src/dotty/tools/dotc/staging/TreeMapWithStages.scala b/compiler/src/dotty/tools/dotc/staging/TreeMapWithStages.scala
index 3c14e534cade..2414c27ae30a 100644
--- a/compiler/src/dotty/tools/dotc/staging/TreeMapWithStages.scala
+++ b/compiler/src/dotty/tools/dotc/staging/TreeMapWithStages.scala
@@ -4,10 +4,10 @@ package staging
 import dotty.tools.dotc.ast.TreeMapWithImplicits
 import dotty.tools.dotc.ast.tpd
 import dotty.tools.dotc.config.Printers.staging
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Decorators._
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.staging.StagingLevel._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Decorators.*
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.staging.StagingLevel.*
 
 import scala.collection.mutable
 
diff --git a/compiler/src/dotty/tools/dotc/transform/AccessProxies.scala b/compiler/src/dotty/tools/dotc/transform/AccessProxies.scala
index 588de1ef91de..6d445887e1d9 100644
--- a/compiler/src/dotty/tools/dotc/transform/AccessProxies.scala
+++ b/compiler/src/dotty/tools/dotc/transform/AccessProxies.scala
@@ -2,14 +2,14 @@ package dotty.tools
 package dotc
 package transform
 
-import core._
-import Contexts._
-import Symbols._
-import Flags._
-import Names._
-import NameOps._
-import Decorators._
-import Types._
+import core.*
+import Contexts.*
+import Symbols.*
+import Flags.*
+import Names.*
+import NameOps.*
+import Decorators.*
+import Types.*
 import util.Spans.Span
 import config.Printers.transforms
 
diff --git a/compiler/src/dotty/tools/dotc/transform/ArrayApply.scala b/compiler/src/dotty/tools/dotc/transform/ArrayApply.scala
index f5e380137d40..154f66ab86da 100644
--- a/compiler/src/dotty/tools/dotc/transform/ArrayApply.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ArrayApply.scala
@@ -3,15 +3,15 @@ package dotc
 package transform
 
 import ast.tpd
-import core._
-import Contexts._
-import Decorators._
-import Symbols._
-import Flags._
-import StdNames._
+import core.*
+import Contexts.*
+import Decorators.*
+import Symbols.*
+import Flags.*
+import StdNames.*
 import reporting.trace
 import util.Property
-import MegaPhase._
+import MegaPhase.*
 
 /** This phase rewrites calls to `Array.apply` to a direct instantiation of the array in the bytecode.
  *
diff --git a/compiler/src/dotty/tools/dotc/transform/ArrayConstructors.scala b/compiler/src/dotty/tools/dotc/transform/ArrayConstructors.scala
index 7300edadcdda..e55d25f16df7 100644
--- a/compiler/src/dotty/tools/dotc/transform/ArrayConstructors.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ArrayConstructors.scala
@@ -5,12 +5,12 @@ import dotty.tools.dotc.ast.tpd
 
 import scala.collection.immutable.::
 
-import core._
-import MegaPhase._
-import Contexts._
-import Symbols._
-import Types._
-import StdNames._
+import core.*
+import MegaPhase.*
+import Contexts.*
+import Symbols.*
+import Types.*
+import StdNames.*
 
 
 /** This phase rewrites calls to array constructors to newArray method in Dotty.runtime.Arrays module.
diff --git a/compiler/src/dotty/tools/dotc/transform/BeanProperties.scala b/compiler/src/dotty/tools/dotc/transform/BeanProperties.scala
index 703a375c9586..e491f8b29dc8 100644
--- a/compiler/src/dotty/tools/dotc/transform/BeanProperties.scala
+++ b/compiler/src/dotty/tools/dotc/transform/BeanProperties.scala
@@ -1,17 +1,17 @@
 package dotty.tools.dotc
 package transform
 
-import core._
-import ast.tpd._
-import Annotations._
-import Contexts._
-import Symbols._
-import Decorators._
-import Flags._
-import Names._
-import Types._
-import util.Spans._
-import DenotTransformers._
+import core.*
+import ast.tpd.*
+import Annotations.*
+import Contexts.*
+import Symbols.*
+import Decorators.*
+import Flags.*
+import Names.*
+import Types.*
+import util.Spans.*
+import DenotTransformers.*
 
 class BeanProperties(thisPhase: DenotTransformer):
   def addBeanMethods(impl: Template)(using Context): Template =
diff --git a/compiler/src/dotty/tools/dotc/transform/BetaReduce.scala b/compiler/src/dotty/tools/dotc/transform/BetaReduce.scala
index a775906c622d..cef6cb1ff6b5 100644
--- a/compiler/src/dotty/tools/dotc/transform/BetaReduce.scala
+++ b/compiler/src/dotty/tools/dotc/transform/BetaReduce.scala
@@ -4,13 +4,13 @@ package transform
 
 import scala.collection.mutable.ListBuffer
 
-import core._
-import Flags._
-import MegaPhase._
-import Symbols._
-import Contexts._
-import Types._
-import Decorators._
+import core.*
+import Flags.*
+import MegaPhase.*
+import Symbols.*
+import Contexts.*
+import Types.*
+import Decorators.*
 import StdNames.nme
 import ast.TreeTypeMap
 
diff --git a/compiler/src/dotty/tools/dotc/transform/Bridges.scala b/compiler/src/dotty/tools/dotc/transform/Bridges.scala
index 27b486f44d9d..076c756ff547 100644
--- a/compiler/src/dotty/tools/dotc/transform/Bridges.scala
+++ b/compiler/src/dotty/tools/dotc/transform/Bridges.scala
@@ -2,15 +2,15 @@ package dotty.tools
 package dotc
 package transform
 
-import core._
-import Symbols._
-import Types._
-import Contexts._
-import Decorators._
-import Flags._
-import Scopes._
-import Phases._
-import DenotTransformers._
+import core.*
+import Symbols.*
+import Types.*
+import Contexts.*
+import Decorators.*
+import Flags.*
+import Scopes.*
+import Phases.*
+import DenotTransformers.*
 import ast.untpd
 import collection.{mutable, immutable}
 import util.SrcPos
diff --git a/compiler/src/dotty/tools/dotc/transform/CapturedVars.scala b/compiler/src/dotty/tools/dotc/transform/CapturedVars.scala
index be2f44fa138e..f9a74f6f3f42 100644
--- a/compiler/src/dotty/tools/dotc/transform/CapturedVars.scala
+++ b/compiler/src/dotty/tools/dotc/transform/CapturedVars.scala
@@ -3,18 +3,18 @@ package transform
 
 import dotty.tools.uncheckedNN
 
-import MegaPhase._
-import core.DenotTransformers._
-import core.Symbols._
-import core.Contexts._
-import core.Flags._
-import core.Decorators._
+import MegaPhase.*
+import core.DenotTransformers.*
+import core.Symbols.*
+import core.Contexts.*
+import core.Flags.*
+import core.Decorators.*
 import core.StdNames.nme
-import core.Names._
+import core.Names.*
 import core.NameKinds.TempResultName
-import core.Constants._
+import core.Constants.*
 import util.Store
-import ast.tpd._
+import ast.tpd.*
 import compiletime.uninitialized
 
 /** This phase translates variables that are captured in closures to
diff --git a/compiler/src/dotty/tools/dotc/transform/CheckLoopingImplicits.scala b/compiler/src/dotty/tools/dotc/transform/CheckLoopingImplicits.scala
index 6e59a137fac7..ee4a3b9af47f 100644
--- a/compiler/src/dotty/tools/dotc/transform/CheckLoopingImplicits.scala
+++ b/compiler/src/dotty/tools/dotc/transform/CheckLoopingImplicits.scala
@@ -1,16 +1,16 @@
 package dotty.tools.dotc
 package transform
 
-import core._
+import core.*
 import MegaPhase.MiniPhase
-import Contexts._
-import Types._
-import Symbols._
-import SymDenotations._
-import Flags._
-import ast._
-import Decorators._
-import StdNames._
+import Contexts.*
+import Types.*
+import Symbols.*
+import SymDenotations.*
+import Flags.*
+import ast.*
+import Decorators.*
+import StdNames.*
 
 object CheckLoopingImplicits:
   val name: String = "checkLoopingImplicits"
diff --git a/compiler/src/dotty/tools/dotc/transform/CheckNoSuperThis.scala b/compiler/src/dotty/tools/dotc/transform/CheckNoSuperThis.scala
index 886588334920..5cf8e6a4352b 100644
--- a/compiler/src/dotty/tools/dotc/transform/CheckNoSuperThis.scala
+++ b/compiler/src/dotty/tools/dotc/transform/CheckNoSuperThis.scala
@@ -1,15 +1,15 @@
 package dotty.tools.dotc
 package transform
 
-import core._
+import core.*
 import MegaPhase.MiniPhase
-import Contexts._
-import Types._
-import Symbols._
-import SymDenotations._
-import Flags._
-import ast._
-import Decorators._
+import Contexts.*
+import Types.*
+import Symbols.*
+import SymDenotations.*
+import Flags.*
+import ast.*
+import Decorators.*
 
 
 object CheckNoSuperThis:
diff --git a/compiler/src/dotty/tools/dotc/transform/CheckReentrant.scala b/compiler/src/dotty/tools/dotc/transform/CheckReentrant.scala
index 9f201dedec66..1e51ac7d5730 100644
--- a/compiler/src/dotty/tools/dotc/transform/CheckReentrant.scala
+++ b/compiler/src/dotty/tools/dotc/transform/CheckReentrant.scala
@@ -1,13 +1,13 @@
 package dotty.tools.dotc
 package transform
 
-import dotty.tools.dotc.transform.MegaPhase._
+import dotty.tools.dotc.transform.MegaPhase.*
 
-import core._
-import Flags._
-import Contexts._
-import Symbols._
-import Decorators._
+import core.*
+import Flags.*
+import Contexts.*
+import Symbols.*
+import Decorators.*
 
 /** A no-op transform that checks whether the compiled sources are re-entrant.
  *  If -Ycheck:reentrant is set, the phase makes sure that there are no variables
diff --git a/compiler/src/dotty/tools/dotc/transform/CheckShadowing.scala b/compiler/src/dotty/tools/dotc/transform/CheckShadowing.scala
index e895956c0878..3e99166b5426 100644
--- a/compiler/src/dotty/tools/dotc/transform/CheckShadowing.scala
+++ b/compiler/src/dotty/tools/dotc/transform/CheckShadowing.scala
@@ -7,10 +7,10 @@ import dotty.tools.dotc.ast.tpd.TreeTraverser
 import dotty.tools.dotc.ast.untpd
 import dotty.tools.dotc.ast.untpd.ImportSelector
 import dotty.tools.dotc.cc.boxedCaptureSet
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.Denotations.SingleDenotation
+import dotty.tools.dotc.core.Flags.*
 import dotty.tools.dotc.core.Flags.EmptyFlags
-import dotty.tools.dotc.core.Flags._
 import dotty.tools.dotc.core.Mode.Type
 import dotty.tools.dotc.core.Names.Name
 import dotty.tools.dotc.core.Names.SimpleName
diff --git a/compiler/src/dotty/tools/dotc/transform/CheckStatic.scala b/compiler/src/dotty/tools/dotc/transform/CheckStatic.scala
index 33aad9fa74d7..1eb6f559cc9d 100644
--- a/compiler/src/dotty/tools/dotc/transform/CheckStatic.scala
+++ b/compiler/src/dotty/tools/dotc/transform/CheckStatic.scala
@@ -2,13 +2,13 @@ package dotty.tools.dotc
 package transform
 
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.transform.MegaPhase._
+import dotty.tools.dotc.transform.MegaPhase.*
 
-import core._
-import Flags._
-import Contexts._
-import Symbols._
-import reporting._
+import core.*
+import Flags.*
+import Contexts.*
+import Symbols.*
+import reporting.*
 
 
 
diff --git a/compiler/src/dotty/tools/dotc/transform/CheckUnused.scala b/compiler/src/dotty/tools/dotc/transform/CheckUnused.scala
index e442d093823e..e26fe221b35e 100644
--- a/compiler/src/dotty/tools/dotc/transform/CheckUnused.scala
+++ b/compiler/src/dotty/tools/dotc/transform/CheckUnused.scala
@@ -7,12 +7,12 @@ import dotty.tools.dotc.ast.untpd
 import dotty.tools.dotc.ast.untpd.ImportSelector
 import dotty.tools.dotc.config.ScalaSettings
 import dotty.tools.dotc.core.Annotations
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.Decorators.em
 import dotty.tools.dotc.core.Decorators.i
 import dotty.tools.dotc.core.Definitions
 import dotty.tools.dotc.core.Flags
-import dotty.tools.dotc.core.Flags._
+import dotty.tools.dotc.core.Flags.*
 import dotty.tools.dotc.core.Flags.flagsString
 import dotty.tools.dotc.core.Mode
 import dotty.tools.dotc.core.NameKinds.WildcardParamName
@@ -20,8 +20,8 @@ import dotty.tools.dotc.core.Names.Name
 import dotty.tools.dotc.core.Phases.Phase
 import dotty.tools.dotc.core.StdNames
 import dotty.tools.dotc.core.StdNames.nme
+import dotty.tools.dotc.core.Symbols.*
 import dotty.tools.dotc.core.Symbols.Symbol
-import dotty.tools.dotc.core.Symbols._
 import dotty.tools.dotc.core.Types.AnnotatedType
 import dotty.tools.dotc.core.Types.ConstantType
 import dotty.tools.dotc.core.Types.NoType
diff --git a/compiler/src/dotty/tools/dotc/transform/CollectEntryPoints.scala b/compiler/src/dotty/tools/dotc/transform/CollectEntryPoints.scala
index ba68190d3ff9..9563af4782a6 100644
--- a/compiler/src/dotty/tools/dotc/transform/CollectEntryPoints.scala
+++ b/compiler/src/dotty/tools/dotc/transform/CollectEntryPoints.scala
@@ -4,12 +4,12 @@ package transform
 import dotty.tools.backend.jvm.GenBCode
 import dotty.tools.io.JarArchive
 
-import core._
+import core.*
 import ast.tpd
-import MegaPhase._
-import Contexts._
-import Symbols._
-import Phases._
+import MegaPhase.*
+import Contexts.*
+import Symbols.*
+import Phases.*
 
 /**
  * Small phase to be run to collect main classes and store them in the context.
diff --git a/compiler/src/dotty/tools/dotc/transform/CollectNullableFields.scala b/compiler/src/dotty/tools/dotc/transform/CollectNullableFields.scala
index 096fa0137918..476cb9dc7320 100644
--- a/compiler/src/dotty/tools/dotc/transform/CollectNullableFields.scala
+++ b/compiler/src/dotty/tools/dotc/transform/CollectNullableFields.scala
@@ -1,8 +1,8 @@
 package dotty.tools.dotc.transform
 
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Flags._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Flags.*
 import dotty.tools.dotc.core.Symbols.Symbol
 import dotty.tools.dotc.transform.MegaPhase.MiniPhase
 
diff --git a/compiler/src/dotty/tools/dotc/transform/CompleteJavaEnums.scala b/compiler/src/dotty/tools/dotc/transform/CompleteJavaEnums.scala
index e3d1f8145aa6..55c86f4c29a7 100644
--- a/compiler/src/dotty/tools/dotc/transform/CompleteJavaEnums.scala
+++ b/compiler/src/dotty/tools/dotc/transform/CompleteJavaEnums.scala
@@ -2,18 +2,18 @@ package dotty.tools
 package dotc
 package transform
 
-import dotty.tools.dotc.transform.MegaPhase._
+import dotty.tools.dotc.transform.MegaPhase.*
 
-import core._
-import Names._
+import core.*
+import Names.*
 import StdNames.nme
-import Types._
-import Flags._
-import Contexts._
-import Symbols._
-import Constants._
-import Decorators._
-import DenotTransformers._
+import Types.*
+import Flags.*
+import Contexts.*
+import Symbols.*
+import Constants.*
+import Decorators.*
+import DenotTransformers.*
 
 
 
diff --git a/compiler/src/dotty/tools/dotc/transform/Constructors.scala b/compiler/src/dotty/tools/dotc/transform/Constructors.scala
index dada92cae4f1..4bddf1b47c5c 100644
--- a/compiler/src/dotty/tools/dotc/transform/Constructors.scala
+++ b/compiler/src/dotty/tools/dotc/transform/Constructors.scala
@@ -1,21 +1,21 @@
 package dotty.tools.dotc
 package transform
 
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.StdNames._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.StdNames.*
 
-import core._
-import MegaPhase._
-import ast._
-import Flags._
+import core.*
+import MegaPhase.*
+import ast.*
+import Flags.*
 import Names.Name
-import NameOps._
+import NameOps.*
 import NameKinds.{FieldName, ExplicitFieldName}
-import Symbols._
-import Decorators._
-import DenotTransformers._
+import Symbols.*
+import Decorators.*
+import DenotTransformers.*
 import collection.mutable
-import Types._
+import Types.*
 
 object Constructors {
   val name: String = "constructors"
diff --git a/compiler/src/dotty/tools/dotc/transform/ContextFunctionResults.scala b/compiler/src/dotty/tools/dotc/transform/ContextFunctionResults.scala
index 668465b3ddfd..1ec3b759d598 100644
--- a/compiler/src/dotty/tools/dotc/transform/ContextFunctionResults.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ContextFunctionResults.scala
@@ -2,16 +2,16 @@ package dotty.tools
 package dotc
 package transform
 
-import core._
-import Contexts._
-import Symbols._
-import Types._
-import Annotations._
-import Constants._
-import Phases._
+import core.*
+import Contexts.*
+import Symbols.*
+import Types.*
+import Annotations.*
+import Constants.*
+import Phases.*
 import StdNames.nme
 import ast.untpd
-import ast.tpd._
+import ast.tpd.*
 import config.Config
 
 object ContextFunctionResults:
diff --git a/compiler/src/dotty/tools/dotc/transform/CookComments.scala b/compiler/src/dotty/tools/dotc/transform/CookComments.scala
index 6f8231579a00..36ce892a8644 100644
--- a/compiler/src/dotty/tools/dotc/transform/CookComments.scala
+++ b/compiler/src/dotty/tools/dotc/transform/CookComments.scala
@@ -1,8 +1,8 @@
 package dotty.tools.dotc.transform
 
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core.ContextOps._
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.ContextOps.*
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.typer.Docstrings
 
 class CookComments extends MegaPhase.MiniPhase {
diff --git a/compiler/src/dotty/tools/dotc/transform/CountOuterAccesses.scala b/compiler/src/dotty/tools/dotc/transform/CountOuterAccesses.scala
index f7a734477366..354e4cc558b1 100644
--- a/compiler/src/dotty/tools/dotc/transform/CountOuterAccesses.scala
+++ b/compiler/src/dotty/tools/dotc/transform/CountOuterAccesses.scala
@@ -1,13 +1,13 @@
 package dotty.tools.dotc
 package transform
 
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 
-import core._
+import core.*
 import MegaPhase.MiniPhase
-import ast._
-import Flags._
-import Symbols._
+import ast.*
+import Flags.*
+import Symbols.*
 import ExplicitOuter.isOuterParamAccessor
 import collection.mutable
 
diff --git a/compiler/src/dotty/tools/dotc/transform/CtxLazy.scala b/compiler/src/dotty/tools/dotc/transform/CtxLazy.scala
index a8333dcabfe2..b61988b3f560 100644
--- a/compiler/src/dotty/tools/dotc/transform/CtxLazy.scala
+++ b/compiler/src/dotty/tools/dotc/transform/CtxLazy.scala
@@ -3,7 +3,7 @@ package transform
 
 import scala.compiletime.uninitialized
 
-import core.Contexts._
+import core.Contexts.*
 
 /** Utility class for lazy values whose evaluation depends on a context.
  *  This should be used whenever the evaluation of a lazy expression
diff --git a/compiler/src/dotty/tools/dotc/transform/Dependencies.scala b/compiler/src/dotty/tools/dotc/transform/Dependencies.scala
index 2a8652f530f0..2cbfffad88fe 100644
--- a/compiler/src/dotty/tools/dotc/transform/Dependencies.scala
+++ b/compiler/src/dotty/tools/dotc/transform/Dependencies.scala
@@ -6,12 +6,12 @@ import dotty.tools.backend.sjs.JSDefinitions.jsdefn
 
 import scala.compiletime.uninitialized
 
-import core._
-import Symbols._
-import Contexts._
-import Types._
-import Flags._
-import Decorators._
+import core.*
+import Symbols.*
+import Contexts.*
+import Types.*
+import Flags.*
+import Decorators.*
 import collection.mutable.{LinkedHashMap, LinkedHashSet}
 import annotation.constructorOnly
 
diff --git a/compiler/src/dotty/tools/dotc/transform/DropBreaks.scala b/compiler/src/dotty/tools/dotc/transform/DropBreaks.scala
index 7b43cea0cf67..ec891454bb84 100644
--- a/compiler/src/dotty/tools/dotc/transform/DropBreaks.scala
+++ b/compiler/src/dotty/tools/dotc/transform/DropBreaks.scala
@@ -3,17 +3,17 @@ package dotc
 package transform
 
 import ast.{Trees, tpd}
-import core._
-import Decorators._
+import core.*
+import Decorators.*
 import NameKinds.BoundaryName
-import MegaPhase._
-import Types._
-import Contexts._
-import Flags._
-import DenotTransformers._
-import Symbols._
-import StdNames._
-import Trees._
+import MegaPhase.*
+import Types.*
+import Contexts.*
+import Flags.*
+import DenotTransformers.*
+import Symbols.*
+import StdNames.*
+import Trees.*
 import util.Property
 import Constants.Constant
 import Flags.MethodOrLazy
diff --git a/compiler/src/dotty/tools/dotc/transform/DropOuterAccessors.scala b/compiler/src/dotty/tools/dotc/transform/DropOuterAccessors.scala
index 5865995f53de..16a4dec27e7d 100644
--- a/compiler/src/dotty/tools/dotc/transform/DropOuterAccessors.scala
+++ b/compiler/src/dotty/tools/dotc/transform/DropOuterAccessors.scala
@@ -1,16 +1,16 @@
 package dotty.tools.dotc
 package transform
 
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 
-import core._
+import core.*
 import MegaPhase.MiniPhase
-import ast._
-import Flags._
-import Symbols._
-import Contexts._
-import Decorators._
-import DenotTransformers._
+import ast.*
+import Flags.*
+import Symbols.*
+import Contexts.*
+import Decorators.*
+import DenotTransformers.*
 import ExplicitOuter.isOuterParamAccessor
 import CountOuterAccesses.mightBeDropped
 import collection.mutable
diff --git a/compiler/src/dotty/tools/dotc/transform/ElimByName.scala b/compiler/src/dotty/tools/dotc/transform/ElimByName.scala
index eb350536502f..004b76c27838 100644
--- a/compiler/src/dotty/tools/dotc/transform/ElimByName.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ElimByName.scala
@@ -4,17 +4,17 @@ package transform
 
 import dotty.tools.dotc.core.Names.Name
 
-import core._
-import Contexts._
-import Symbols._
-import Types._
-import Flags._
-import SymDenotations._
+import core.*
+import Contexts.*
+import Symbols.*
+import Types.*
+import Flags.*
+import SymDenotations.*
 import DenotTransformers.InfoTransformer
 import NameKinds.SuperArgName
 import core.StdNames.nme
-import MegaPhase._
-import Decorators._
+import MegaPhase.*
+import Decorators.*
 import typer.RefChecks
 import reporting.trace
 
diff --git a/compiler/src/dotty/tools/dotc/transform/ElimErasedValueType.scala b/compiler/src/dotty/tools/dotc/transform/ElimErasedValueType.scala
index 7e9757963c8f..0c90e55c9a38 100644
--- a/compiler/src/dotty/tools/dotc/transform/ElimErasedValueType.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ElimErasedValueType.scala
@@ -3,20 +3,20 @@ package dotc
 package transform
 
 import ast.{Trees, tpd}
-import core._
-import core.Decorators._
-import MegaPhase._
-import Types._
-import Contexts._
-import Flags._
-import DenotTransformers._
-import Phases._
-import Symbols._
-import StdNames._
-import Trees._
+import core.*
+import core.Decorators.*
+import MegaPhase.*
+import Types.*
+import Contexts.*
+import Flags.*
+import DenotTransformers.*
+import Phases.*
+import Symbols.*
+import StdNames.*
+import Trees.*
 import TypeErasure.ErasedValueType
-import ValueClasses._
-import reporting._
+import ValueClasses.*
+import reporting.*
 import NameKinds.SuperAccessorName
 
 object ElimErasedValueType {
diff --git a/compiler/src/dotty/tools/dotc/transform/ElimOpaque.scala b/compiler/src/dotty/tools/dotc/transform/ElimOpaque.scala
index 00f1e77e3ebf..b647db7040ee 100644
--- a/compiler/src/dotty/tools/dotc/transform/ElimOpaque.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ElimOpaque.scala
@@ -2,17 +2,17 @@ package dotty.tools
 package dotc
 package transform
 
-import dotty.tools.dotc.transform.MegaPhase._
+import dotty.tools.dotc.transform.MegaPhase.*
 
-import core._
-import Flags._
-import Types._
-import Contexts._
-import Symbols._
+import core.*
+import Flags.*
+import Types.*
+import Contexts.*
+import Symbols.*
 import Denotations.{SingleDenotation, NonSymSingleDenotation}
 import SymDenotations.SymDenotation
-import DenotTransformers._
-import Names._
+import DenotTransformers.*
+import Names.*
 
 object ElimOpaque {
   val name: String = "elimOpaque"
diff --git a/compiler/src/dotty/tools/dotc/transform/ElimOuterSelect.scala b/compiler/src/dotty/tools/dotc/transform/ElimOuterSelect.scala
index 87c0de923c26..8527ad26e51b 100644
--- a/compiler/src/dotty/tools/dotc/transform/ElimOuterSelect.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ElimOuterSelect.scala
@@ -1,10 +1,10 @@
 package dotty.tools.dotc
 package transform
 
-import core._
+import core.*
 import MegaPhase.MiniPhase
-import Contexts._
-import Types._
+import Contexts.*
+import Types.*
 import NameKinds.OuterSelectName
 
 /** This phase rewrites outer selects `E.n_<outer>` which were introduced by
diff --git a/compiler/src/dotty/tools/dotc/transform/ElimPackagePrefixes.scala b/compiler/src/dotty/tools/dotc/transform/ElimPackagePrefixes.scala
index 3579292c3683..b869fa6a598e 100644
--- a/compiler/src/dotty/tools/dotc/transform/ElimPackagePrefixes.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ElimPackagePrefixes.scala
@@ -1,14 +1,14 @@
 package dotty.tools.dotc
 package transform
 
-import core._
-import Decorators._
-import Flags._
-import Types._
-import Contexts._
-import Symbols._
-import ast.tpd._
-import Flags._
+import core.*
+import Decorators.*
+import Flags.*
+import Types.*
+import Contexts.*
+import Symbols.*
+import ast.tpd.*
+import Flags.*
 import MegaPhase.MiniPhase
 
 /** Eliminates syntactic references to package terms as prefixes of classes, so that there's no chance
diff --git a/compiler/src/dotty/tools/dotc/transform/ElimPolyFunction.scala b/compiler/src/dotty/tools/dotc/transform/ElimPolyFunction.scala
index 640241ce0f86..0d31e8e6c11a 100644
--- a/compiler/src/dotty/tools/dotc/transform/ElimPolyFunction.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ElimPolyFunction.scala
@@ -2,26 +2,26 @@ package dotty.tools.dotc
 package transform
 
 import ast.{Trees, tpd}
-import core._
-import core.Decorators._
-import MegaPhase._
+import core.*
+import core.Decorators.*
+import MegaPhase.*
 import Phases.Phase
-import Types._
-import Contexts._
-import Constants._
-import Names._
-import NameOps._
-import Flags._
-import DenotTransformers._
-import SymDenotations._
-import Symbols._
-import StdNames._
-import Annotations._
-import Trees._
-import Scopes._
-import Denotations._
+import Types.*
+import Contexts.*
+import Constants.*
+import Names.*
+import NameOps.*
+import Flags.*
+import DenotTransformers.*
+import SymDenotations.*
+import Symbols.*
+import StdNames.*
+import Annotations.*
+import Trees.*
+import Scopes.*
+import Denotations.*
 import TypeErasure.ErasedValueType
-import ValueClasses._
+import ValueClasses.*
 
 /** This phase rewrite PolyFunction subclasses to FunctionN subclasses
  *
diff --git a/compiler/src/dotty/tools/dotc/transform/ElimRepeated.scala b/compiler/src/dotty/tools/dotc/transform/ElimRepeated.scala
index c56ef5a49df7..b494a9e0566d 100644
--- a/compiler/src/dotty/tools/dotc/transform/ElimRepeated.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ElimRepeated.scala
@@ -2,18 +2,18 @@ package dotty.tools
 package dotc
 package transform
 
-import core._
+import core.*
 import StdNames.nme
-import Types._
-import transform.MegaPhase._
-import Flags._
-import Contexts._
-import Symbols._
-import Decorators._
-import Denotations._
-import SymDenotations._
-import DenotTransformers._
-import NullOpsDecorator._
+import Types.*
+import transform.MegaPhase.*
+import Flags.*
+import Contexts.*
+import Symbols.*
+import Decorators.*
+import Denotations.*
+import SymDenotations.*
+import DenotTransformers.*
+import NullOpsDecorator.*
 
 object ElimRepeated {
   val name: String = "elimRepeated"
diff --git a/compiler/src/dotty/tools/dotc/transform/ElimStaticThis.scala b/compiler/src/dotty/tools/dotc/transform/ElimStaticThis.scala
index 2b71c98ada86..73143a97f892 100644
--- a/compiler/src/dotty/tools/dotc/transform/ElimStaticThis.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ElimStaticThis.scala
@@ -5,9 +5,9 @@ import dotty.tools.dotc.ast.tpd
 import dotty.tools.dotc.core.Types.TermRef
 import dotty.tools.dotc.core.Types.ThisType
 
-import core._
-import Contexts._
-import Flags._
+import core.*
+import Contexts.*
+import Flags.*
 import MegaPhase.MiniPhase
 
 /** Replace This references to module classes in static methods by global identifiers to the
diff --git a/compiler/src/dotty/tools/dotc/transform/EmptyPhase.scala b/compiler/src/dotty/tools/dotc/transform/EmptyPhase.scala
index 5554a6564678..9a287b2dd1d9 100644
--- a/compiler/src/dotty/tools/dotc/transform/EmptyPhase.scala
+++ b/compiler/src/dotty/tools/dotc/transform/EmptyPhase.scala
@@ -1,7 +1,7 @@
 package dotty.tools.dotc
 package transform
 
-import core._
+import core.*
 import Contexts.Context
 import Phases.Phase
 
diff --git a/compiler/src/dotty/tools/dotc/transform/Erasure.scala b/compiler/src/dotty/tools/dotc/transform/Erasure.scala
index 79ffdd1fe9f1..84a3987493ea 100644
--- a/compiler/src/dotty/tools/dotc/transform/Erasure.scala
+++ b/compiler/src/dotty/tools/dotc/transform/Erasure.scala
@@ -7,36 +7,36 @@ import dotty.tools.dotc.ast.untpd
 import dotty.tools.dotc.core.Constants
 import dotty.tools.dotc.core.Flags
 
-import core.Phases._
-import core.DenotTransformers._
-import core.Denotations._
-import core.SymDenotations._
-import core.Symbols._
-import core.Contexts._
-import core.Types._
-import core.Names._
-import core.StdNames._
-import core.NameOps._
+import core.Phases.*
+import core.DenotTransformers.*
+import core.Denotations.*
+import core.SymDenotations.*
+import core.Symbols.*
+import core.Contexts.*
+import core.Types.*
+import core.Names.*
+import core.StdNames.*
+import core.NameOps.*
 import core.NameKinds.{AdaptedClosureName, BodyRetainerName, DirectMethName}
 import core.Scopes.newScopeWith
-import core.Decorators._
-import core.Constants._
-import core.Definitions._
+import core.Decorators.*
+import core.Constants.*
+import core.Definitions.*
 import core.Annotations.BodyAnnotation
 import typer.NoChecking
 import inlines.Inlines
-import typer.ProtoTypes._
+import typer.ProtoTypes.*
 import typer.ErrorReporting.errorTree
 import typer.Checking.checkValue
-import core.TypeErasure._
-import core.Decorators._
+import core.TypeErasure.*
+import core.Decorators.*
 import ast.TreeTypeMap
-import ValueClasses._
-import ContextFunctionResults._
-import ExplicitOuter._
+import ValueClasses.*
+import ContextFunctionResults.*
+import ExplicitOuter.*
 import core.Mode
 import util.Property
-import reporting._
+import reporting.*
 
 class Erasure extends Phase with DenotTransformer {
 
diff --git a/compiler/src/dotty/tools/dotc/transform/EtaReduce.scala b/compiler/src/dotty/tools/dotc/transform/EtaReduce.scala
index 11a0c6d7c6e8..78334ce98925 100644
--- a/compiler/src/dotty/tools/dotc/transform/EtaReduce.scala
+++ b/compiler/src/dotty/tools/dotc/transform/EtaReduce.scala
@@ -3,11 +3,11 @@ package dotc
 package transform
 
 import MegaPhase.MiniPhase
-import core._
-import Symbols._
-import Contexts._
-import Types._
-import Decorators._
+import core.*
+import Symbols.*
+import Contexts.*
+import Types.*
+import Decorators.*
 import StdNames.nme
 import NameKinds.AdaptedClosureName
 
diff --git a/compiler/src/dotty/tools/dotc/transform/ExpandPrivate.scala b/compiler/src/dotty/tools/dotc/transform/ExpandPrivate.scala
index 8a3068dfd2f8..432089b6f5f1 100644
--- a/compiler/src/dotty/tools/dotc/transform/ExpandPrivate.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ExpandPrivate.scala
@@ -5,14 +5,14 @@ import dotty.tools.dotc.core.DenotTransformers.IdentityDenotTransformer
 
 import java.io.File.separatorChar
 
-import core._
-import Contexts._
-import Symbols._
-import Flags._
-import SymDenotations._
-import Decorators._
-import MegaPhase._
-import ValueClasses._
+import core.*
+import Contexts.*
+import Symbols.*
+import Flags.*
+import SymDenotations.*
+import Decorators.*
+import MegaPhase.*
+import ValueClasses.*
 
 /** Make private term members that are accessed from another class
  *  non-private by resetting the Private flag and expanding their name.
diff --git a/compiler/src/dotty/tools/dotc/transform/ExpandSAMs.scala b/compiler/src/dotty/tools/dotc/transform/ExpandSAMs.scala
index c6b698b90dcc..a0cdfe6c5b37 100644
--- a/compiler/src/dotty/tools/dotc/transform/ExpandSAMs.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ExpandSAMs.scala
@@ -2,18 +2,18 @@ package dotty.tools
 package dotc
 package transform
 
-import core._
+import core.*
 import Scopes.newScope
-import Contexts._
-import Symbols._
-import Types._
-import Flags._
-import Decorators._
-import StdNames._
-import Constants._
-import MegaPhase._
+import Contexts.*
+import Symbols.*
+import Types.*
+import Flags.*
+import Decorators.*
+import StdNames.*
+import Constants.*
+import MegaPhase.*
 import Names.TypeName
-import NullOpsDecorator._
+import NullOpsDecorator.*
 import ast.untpd
 
 /** Expand SAM closures that cannot be represented by the JVM as lambdas to anonymous classes.
diff --git a/compiler/src/dotty/tools/dotc/transform/ExplicitOuter.scala b/compiler/src/dotty/tools/dotc/transform/ExplicitOuter.scala
index 5b6b8b09d196..b7c9c841c323 100644
--- a/compiler/src/dotty/tools/dotc/transform/ExplicitOuter.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ExplicitOuter.scala
@@ -6,17 +6,17 @@ import dotty.tools.dotc.ast.tpd
 
 import scala.annotation.tailrec
 
-import MegaPhase._
-import core.DenotTransformers._
-import core.Symbols._
-import core.Contexts._
-import core.Phases._
-import core.Types._
-import core.Flags._
-import core.Decorators._
+import MegaPhase.*
+import core.DenotTransformers.*
+import core.Symbols.*
+import core.Contexts.*
+import core.Phases.*
+import core.Types.*
+import core.Flags.*
+import core.Decorators.*
 import core.StdNames.nme
-import core.Names._
-import core.NameOps._
+import core.Names.*
+import core.NameOps.*
 import core.NameKinds.SuperArgName
 import collection.mutable
 
diff --git a/compiler/src/dotty/tools/dotc/transform/ExplicitSelf.scala b/compiler/src/dotty/tools/dotc/transform/ExplicitSelf.scala
index eb09810eeb53..740473d71b6f 100644
--- a/compiler/src/dotty/tools/dotc/transform/ExplicitSelf.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ExplicitSelf.scala
@@ -1,14 +1,14 @@
 package dotty.tools.dotc
 package transform
 
-import core._
-import Contexts._
-import Types._
-import MegaPhase._
-import ast.Trees._
-import Symbols._
-import Decorators._
-import Flags._
+import core.*
+import Contexts.*
+import Types.*
+import MegaPhase.*
+import ast.Trees.*
+import Symbols.*
+import Decorators.*
+import Flags.*
 
 
 /** Transform references of the form
diff --git a/compiler/src/dotty/tools/dotc/transform/ExtensionMethods.scala b/compiler/src/dotty/tools/dotc/transform/ExtensionMethods.scala
index 42f96af17922..93eb99216943 100644
--- a/compiler/src/dotty/tools/dotc/transform/ExtensionMethods.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ExtensionMethods.scala
@@ -6,25 +6,25 @@ package dotty.tools.dotc
 package transform
 
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.transform.MegaPhase._
+import dotty.tools.dotc.transform.MegaPhase.*
 
 import scala.collection.mutable
 
-import ValueClasses._
-import core._
-import Types._
-import Contexts._
-import Names._
-import Flags._
-import DenotTransformers._
-import Phases._
-import SymDenotations._
-import Symbols._
-import StdNames._
-import Denotations._
+import ValueClasses.*
+import core.*
+import Types.*
+import Contexts.*
+import Names.*
+import Flags.*
+import DenotTransformers.*
+import Phases.*
+import SymDenotations.*
+import Symbols.*
+import StdNames.*
+import Denotations.*
 import TypeErasure.{ valueErasure, ErasedValueType }
 import NameKinds.{ExtMethName, BodyRetainerName}
-import Decorators._
+import Decorators.*
 
 /**
  * Perform Step 1 in the inline classes SIP: Creates extension methods for all
diff --git a/compiler/src/dotty/tools/dotc/transform/FirstTransform.scala b/compiler/src/dotty/tools/dotc/transform/FirstTransform.scala
index 8d6f4b4e3ece..ae72243cada8 100644
--- a/compiler/src/dotty/tools/dotc/transform/FirstTransform.scala
+++ b/compiler/src/dotty/tools/dotc/transform/FirstTransform.scala
@@ -1,23 +1,23 @@
 package dotty.tools.dotc
 package transform
 
-import dotty.tools.dotc.transform.MegaPhase._
+import dotty.tools.dotc.transform.MegaPhase.*
 
 import scala.collection.mutable
 
-import core._
-import Names._
+import core.*
+import Names.*
 import ast.untpd
-import Flags._
-import Types._
+import Flags.*
+import Types.*
 import Constants.Constant
-import Contexts._
-import Symbols._
-import Decorators._
-import DenotTransformers._
-import NameOps._
+import Contexts.*
+import Symbols.*
+import Decorators.*
+import DenotTransformers.*
+import NameOps.*
 import NameKinds.OuterSelectName
-import StdNames._
+import StdNames.*
 import config.Feature
 import inlines.Inlines.inInlineMethod
 
diff --git a/compiler/src/dotty/tools/dotc/transform/Flatten.scala b/compiler/src/dotty/tools/dotc/transform/Flatten.scala
index 836f75733215..4dcbd0bd0000 100644
--- a/compiler/src/dotty/tools/dotc/transform/Flatten.scala
+++ b/compiler/src/dotty/tools/dotc/transform/Flatten.scala
@@ -3,10 +3,10 @@ package transform
 
 import scala.compiletime.uninitialized
 
-import core._
+import core.*
 import DenotTransformers.SymTransformer
-import Contexts._
-import Flags._
+import Contexts.*
+import Flags.*
 import SymDenotations.SymDenotation
 import collection.mutable
 import MegaPhase.MiniPhase
diff --git a/compiler/src/dotty/tools/dotc/transform/ForwardDepChecks.scala b/compiler/src/dotty/tools/dotc/transform/ForwardDepChecks.scala
index 8ca91ef2cbcc..c1a1dde5cbdc 100644
--- a/compiler/src/dotty/tools/dotc/transform/ForwardDepChecks.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ForwardDepChecks.scala
@@ -4,13 +4,13 @@ package transform
 
 import scala.compiletime.uninitialized
 
-import core._
-import Symbols._
-import Types._
-import Contexts._
-import Flags._
-import Decorators._
-import reporting._
+import core.*
+import Symbols.*
+import Types.*
+import Contexts.*
+import Flags.*
+import Decorators.*
+import reporting.*
 import util.Spans.Span
 import util.Store
 import collection.immutable
diff --git a/compiler/src/dotty/tools/dotc/transform/FullParameterization.scala b/compiler/src/dotty/tools/dotc/transform/FullParameterization.scala
index ffa5def0be5f..dbb4c72ab311 100644
--- a/compiler/src/dotty/tools/dotc/transform/FullParameterization.scala
+++ b/compiler/src/dotty/tools/dotc/transform/FullParameterization.scala
@@ -1,13 +1,13 @@
 package dotty.tools.dotc
 package transform
 
-import core._
-import Types._
-import Contexts._
-import Symbols._
-import Decorators._
+import core.*
+import Types.*
+import Contexts.*
+import Symbols.*
+import Decorators.*
 import StdNames.nme
-import ast._
+import ast.*
 
 /** Provides methods to produce fully parameterized versions of instance methods,
  *  where the `this` of the enclosing class is abstracted out in an extra leading
diff --git a/compiler/src/dotty/tools/dotc/transform/FunctionXXLForwarders.scala b/compiler/src/dotty/tools/dotc/transform/FunctionXXLForwarders.scala
index 9c4f07605d38..4cf176cfda3a 100644
--- a/compiler/src/dotty/tools/dotc/transform/FunctionXXLForwarders.scala
+++ b/compiler/src/dotty/tools/dotc/transform/FunctionXXLForwarders.scala
@@ -1,16 +1,16 @@
 package dotty.tools.dotc
 package transform
 
-import core._
+import core.*
 import Constants.Constant
-import Contexts._
-import Flags._
-import Definitions._
-import DenotTransformers._
-import StdNames._
-import Symbols._
-import MegaPhase._
-import Types._
+import Contexts.*
+import Flags.*
+import Definitions.*
+import DenotTransformers.*
+import StdNames.*
+import Symbols.*
+import MegaPhase.*
+import Types.*
 
 
 /** This phase adds forwarder for XXL functions `apply` methods that are implemented with a method
diff --git a/compiler/src/dotty/tools/dotc/transform/GenericSignatures.scala b/compiler/src/dotty/tools/dotc/transform/GenericSignatures.scala
index 784e89fdb59a..5d2ded27d231 100644
--- a/compiler/src/dotty/tools/dotc/transform/GenericSignatures.scala
+++ b/compiler/src/dotty/tools/dotc/transform/GenericSignatures.scala
@@ -5,17 +5,17 @@ package transform
 import java.lang.StringBuilder
 import scala.collection.mutable.ListBuffer
 
-import core.Annotations._
-import core.Contexts._
-import core.Phases._
-import core.Decorators._
+import core.Annotations.*
+import core.Contexts.*
+import core.Phases.*
+import core.Decorators.*
 import core.Definitions
-import core.Flags._
+import core.Flags.*
 import core.Names.Name
-import core.Symbols._
+import core.Symbols.*
 import core.TypeApplications.{EtaExpansion, TypeParamInfo}
 import core.TypeErasure.{erasedGlb, erasure, fullErasure, isGenericArrayElement, tupleArity}
-import core.Types._
+import core.Types.*
 import core.classfile.ClassfileConstants
 import config.Printers.transforms
 import reporting.trace
diff --git a/compiler/src/dotty/tools/dotc/transform/Getters.scala b/compiler/src/dotty/tools/dotc/transform/Getters.scala
index e7baa017a122..a0a3039bc72c 100644
--- a/compiler/src/dotty/tools/dotc/transform/Getters.scala
+++ b/compiler/src/dotty/tools/dotc/transform/Getters.scala
@@ -1,15 +1,15 @@
 package dotty.tools.dotc
 package transform
 
-import core._
+import core.*
 import DenotTransformers.SymTransformer
-import Contexts._
+import Contexts.*
 import SymDenotations.SymDenotation
-import Types._
-import Symbols._
-import MegaPhase._
-import Flags._
-import NameOps._
+import Types.*
+import Symbols.*
+import MegaPhase.*
+import Flags.*
+import NameOps.*
 
 
 /** Performs the following rewritings for fields of a class:
diff --git a/compiler/src/dotty/tools/dotc/transform/HoistSuperArgs.scala b/compiler/src/dotty/tools/dotc/transform/HoistSuperArgs.scala
index b38efbe15f52..201c57e480ac 100644
--- a/compiler/src/dotty/tools/dotc/transform/HoistSuperArgs.scala
+++ b/compiler/src/dotty/tools/dotc/transform/HoistSuperArgs.scala
@@ -1,18 +1,18 @@
 package dotty.tools.dotc
 package transform
 
-import MegaPhase._
-import core.DenotTransformers._
-import core.Symbols._
-import core.Contexts._
+import MegaPhase.*
+import core.DenotTransformers.*
+import core.Symbols.*
+import core.Contexts.*
 import ast.TreeTypeMap
-import core.Types._
-import core.Flags._
-import core.Decorators._
+import core.Types.*
+import core.Flags.*
+import core.Decorators.*
 import collection.mutable
-import ast.Trees._
+import ast.Trees.*
 import core.NameKinds.SuperArgName
-import core.Decorators._
+import core.Decorators.*
 
 object HoistSuperArgs {
   val name: String = "hoistSuperArgs"
diff --git a/compiler/src/dotty/tools/dotc/transform/InlinePatterns.scala b/compiler/src/dotty/tools/dotc/transform/InlinePatterns.scala
index 802d4ed72c62..3a2b15bcca34 100644
--- a/compiler/src/dotty/tools/dotc/transform/InlinePatterns.scala
+++ b/compiler/src/dotty/tools/dotc/transform/InlinePatterns.scala
@@ -4,14 +4,14 @@ package transform
 
 import scala.collection.mutable.ListBuffer
 
-import core._
-import MegaPhase._
-import Symbols._
-import Contexts._
-import Types._
-import Decorators._
-import NameOps._
-import Names._
+import core.*
+import MegaPhase.*
+import Symbols.*
+import Contexts.*
+import Types.*
+import Decorators.*
+import NameOps.*
+import Names.*
 
 /** Rewrite an application
  *
diff --git a/compiler/src/dotty/tools/dotc/transform/InlineVals.scala b/compiler/src/dotty/tools/dotc/transform/InlineVals.scala
index d451571366e8..680f63310b08 100644
--- a/compiler/src/dotty/tools/dotc/transform/InlineVals.scala
+++ b/compiler/src/dotty/tools/dotc/transform/InlineVals.scala
@@ -2,11 +2,11 @@ package dotty.tools
 package dotc
 package transform
 
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Decorators._
-import dotty.tools.dotc.core.Flags._
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.core.Types._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Decorators.*
+import dotty.tools.dotc.core.Flags.*
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.core.Types.*
 import dotty.tools.dotc.inlines.Inlines
 import dotty.tools.dotc.transform.MegaPhase.MiniPhase
 
diff --git a/compiler/src/dotty/tools/dotc/transform/Inlining.scala b/compiler/src/dotty/tools/dotc/transform/Inlining.scala
index 748aeeef3a5b..b45b9f67b504 100644
--- a/compiler/src/dotty/tools/dotc/transform/Inlining.scala
+++ b/compiler/src/dotty/tools/dotc/transform/Inlining.scala
@@ -2,19 +2,19 @@ package dotty.tools.dotc
 package transform
 
 import dotty.tools.dotc.ast.TreeMapWithImplicits
-import dotty.tools.dotc.ast.Trees._
+import dotty.tools.dotc.ast.Trees.*
 import dotty.tools.dotc.ast.tpd
 import dotty.tools.dotc.core.DenotTransformers.IdentityDenotTransformer
 import dotty.tools.dotc.inlines.Inlines
-import dotty.tools.dotc.quoted._
+import dotty.tools.dotc.quoted.*
 import dotty.tools.dotc.staging.StagingLevel
 
 import scala.collection.mutable.ListBuffer
 
-import core._
-import Flags._
-import Contexts._
-import Symbols._
+import core.*
+import Flags.*
+import Contexts.*
+import Symbols.*
 
 /** Inlines all calls to inline methods that are not in an inline method or a quote */
 class Inlining extends MacroTransform, IdentityDenotTransformer {
diff --git a/compiler/src/dotty/tools/dotc/transform/InstrumentCoverage.scala b/compiler/src/dotty/tools/dotc/transform/InstrumentCoverage.scala
index 444798fde4a9..2723f726f064 100644
--- a/compiler/src/dotty/tools/dotc/transform/InstrumentCoverage.scala
+++ b/compiler/src/dotty/tools/dotc/transform/InstrumentCoverage.scala
@@ -3,17 +3,17 @@ package transform
 
 import java.io.File
 
-import ast.tpd._
+import ast.tpd.*
 import collection.mutable
-import core.Flags._
+import core.Flags.*
 import core.Contexts.{Context, ctx, inContext}
 import core.DenotTransformers.IdentityDenotTransformer
 import core.Symbols.{defn, Symbol}
 import core.Constants.Constant
 import core.NameOps.isContextFunction
 import core.StdNames.nme
-import core.Types._
-import coverage._
+import core.Types.*
+import coverage.*
 import typer.LiftCoverage
 import util.{SourcePosition, SourceFile}
 import util.Spans.Span
diff --git a/compiler/src/dotty/tools/dotc/transform/Instrumentation.scala b/compiler/src/dotty/tools/dotc/transform/Instrumentation.scala
index b8885432fc20..7504e62febc9 100644
--- a/compiler/src/dotty/tools/dotc/transform/Instrumentation.scala
+++ b/compiler/src/dotty/tools/dotc/transform/Instrumentation.scala
@@ -4,13 +4,13 @@ package transform
 
 import scala.compiletime.uninitialized
 
-import core._
-import Contexts._
-import Symbols._
-import Flags._
-import Decorators._
-import MegaPhase._
-import Names._
+import core.*
+import Contexts.*
+import Symbols.*
+import Flags.*
+import Decorators.*
+import MegaPhase.*
+import Names.*
 import Constants.Constant
 
 
diff --git a/compiler/src/dotty/tools/dotc/transform/InterceptedMethods.scala b/compiler/src/dotty/tools/dotc/transform/InterceptedMethods.scala
index 73da83fd8467..c2fdccc2861e 100644
--- a/compiler/src/dotty/tools/dotc/transform/InterceptedMethods.scala
+++ b/compiler/src/dotty/tools/dotc/transform/InterceptedMethods.scala
@@ -3,11 +3,11 @@ package transform
 
 import dotty.tools.dotc.ast.tpd
 import dotty.tools.dotc.core.Constants.Constant
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.Names.TermName
-import dotty.tools.dotc.core.StdNames._
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.core.Types._
+import dotty.tools.dotc.core.StdNames.*
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.core.Types.*
 import dotty.tools.dotc.transform.MegaPhase.MiniPhase
 
 object InterceptedMethods {
diff --git a/compiler/src/dotty/tools/dotc/transform/LambdaLift.scala b/compiler/src/dotty/tools/dotc/transform/LambdaLift.scala
index 7404603263c2..db20885191c1 100644
--- a/compiler/src/dotty/tools/dotc/transform/LambdaLift.scala
+++ b/compiler/src/dotty/tools/dotc/transform/LambdaLift.scala
@@ -3,17 +3,17 @@ package transform
 
 import scala.compiletime.uninitialized
 
-import MegaPhase._
+import MegaPhase.*
 import core.Denotations.NonSymSingleDenotation
-import core.DenotTransformers._
-import core.Symbols._
-import core.Contexts._
-import core.Types._
-import core.Flags._
-import core.Decorators._
+import core.DenotTransformers.*
+import core.Symbols.*
+import core.Contexts.*
+import core.Types.*
+import core.Flags.*
+import core.Decorators.*
 import core.StdNames.nme
-import core.Names._
-import core.NameOps._
+import core.Names.*
+import core.NameOps.*
 import core.NameKinds.ExpandPrefixName
 import ExplicitOuter.outer
 import util.Store
diff --git a/compiler/src/dotty/tools/dotc/transform/LazyVals.scala b/compiler/src/dotty/tools/dotc/transform/LazyVals.scala
index d36c632c8168..0ff11d7e1fe7 100644
--- a/compiler/src/dotty/tools/dotc/transform/LazyVals.scala
+++ b/compiler/src/dotty/tools/dotc/transform/LazyVals.scala
@@ -10,14 +10,14 @@ import scala.compiletime.uninitialized
 import ast.tpd
 import core.Annotations.Annotation
 import core.Constants.Constant
-import core.Contexts._
-import core.Decorators._
+import core.Contexts.*
+import core.Decorators.*
 import core.DenotTransformers.IdentityDenotTransformer
-import core.Flags._
+import core.Flags.*
 import core.NameKinds.{ExpandedName, LazyBitMapName, LazyLocalInitName, LazyLocalName}
 import core.StdNames.nme
-import core.Symbols._
-import core.Types._
+import core.Symbols.*
+import core.Types.*
 import core.{Names, StdNames}
 import transform.MegaPhase.MiniPhase
 
diff --git a/compiler/src/dotty/tools/dotc/transform/LetOverApply.scala b/compiler/src/dotty/tools/dotc/transform/LetOverApply.scala
index e3962b96f46e..8cdf9ae9e7f6 100644
--- a/compiler/src/dotty/tools/dotc/transform/LetOverApply.scala
+++ b/compiler/src/dotty/tools/dotc/transform/LetOverApply.scala
@@ -2,11 +2,11 @@ package dotty.tools
 package dotc
 package transform
 
-import core._
-import Contexts._
-import Symbols._
-import Decorators._
-import MegaPhase._
+import core.*
+import Contexts.*
+import Symbols.*
+import Decorators.*
+import MegaPhase.*
 
 /** Rewrite `{ stats; expr}.f(args)` to `{ stats; expr.f(args) }` and
  *  `{ stats; expr }(args)` to `{ stats; expr(args) }` before proceeding,
diff --git a/compiler/src/dotty/tools/dotc/transform/MacroAnnotations.scala b/compiler/src/dotty/tools/dotc/transform/MacroAnnotations.scala
index 98ac6a9043fb..95a35e4c00d8 100644
--- a/compiler/src/dotty/tools/dotc/transform/MacroAnnotations.scala
+++ b/compiler/src/dotty/tools/dotc/transform/MacroAnnotations.scala
@@ -1,18 +1,18 @@
 package dotty.tools.dotc
 package transform
 
-import dotty.tools.dotc.ast.Trees._
+import dotty.tools.dotc.ast.Trees.*
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.config.Printers.{macroAnnot => debug}
-import dotty.tools.dotc.core.Annotations._
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Decorators._
+import dotty.tools.dotc.config.Printers.macroAnnot as debug
+import dotty.tools.dotc.core.Annotations.*
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Decorators.*
 import dotty.tools.dotc.core.DenotTransformers.IdentityDenotTransformer
-import dotty.tools.dotc.core.Flags._
+import dotty.tools.dotc.core.Flags.*
 import dotty.tools.dotc.core.MacroClassLoader
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.core.Types._
-import dotty.tools.dotc.quoted._
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.core.Types.*
+import dotty.tools.dotc.quoted.*
 import dotty.tools.dotc.util.SrcPos
 
 import java.lang.reflect.InvocationTargetException
diff --git a/compiler/src/dotty/tools/dotc/transform/MacroTransform.scala b/compiler/src/dotty/tools/dotc/transform/MacroTransform.scala
index 2dd13e6fdcff..887a962f7a65 100644
--- a/compiler/src/dotty/tools/dotc/transform/MacroTransform.scala
+++ b/compiler/src/dotty/tools/dotc/transform/MacroTransform.scala
@@ -1,10 +1,10 @@
 package dotty.tools.dotc
 package transform
 
-import core._
-import Phases._
-import ast.Trees._
-import Contexts._
+import core.*
+import Phases.*
+import ast.Trees.*
+import Contexts.*
 
 /** A base class for transforms.
  *  A transform contains a compiler phase which applies a tree transformer.
diff --git a/compiler/src/dotty/tools/dotc/transform/MegaPhase.scala b/compiler/src/dotty/tools/dotc/transform/MegaPhase.scala
index 825b8f2af160..bb63fa4b4ac3 100644
--- a/compiler/src/dotty/tools/dotc/transform/MegaPhase.scala
+++ b/compiler/src/dotty/tools/dotc/transform/MegaPhase.scala
@@ -4,13 +4,13 @@ package transform
 
 import scala.compiletime.uninitialized
 
-import core._
-import Contexts._
-import Phases._
-import Symbols._
-import Decorators._
+import core.*
+import Contexts.*
+import Phases.*
+import Symbols.*
+import Decorators.*
 import Flags.PackageVal
-import staging.StagingLevel._
+import staging.StagingLevel.*
 
 /** A MegaPhase combines a number of mini-phases which are all executed in
  *  a single tree traversal.
diff --git a/compiler/src/dotty/tools/dotc/transform/Memoize.scala b/compiler/src/dotty/tools/dotc/transform/Memoize.scala
index 4dcb2c646a92..217022328e3a 100644
--- a/compiler/src/dotty/tools/dotc/transform/Memoize.scala
+++ b/compiler/src/dotty/tools/dotc/transform/Memoize.scala
@@ -3,20 +3,20 @@ package transform
 
 import scala.compiletime.uninitialized
 
-import core._
-import DenotTransformers._
-import Contexts._
-import Phases._
+import core.*
+import DenotTransformers.*
+import Contexts.*
+import Phases.*
 import SymDenotations.SymDenotation
-import Denotations._
-import Symbols._
-import Constants._
-import MegaPhase._
-import NameOps._
-import Flags._
-import Decorators._
+import Denotations.*
+import Symbols.*
+import Constants.*
+import MegaPhase.*
+import NameOps.*
+import Flags.*
+import Decorators.*
 import StdNames.nme
-import sjs.JSSymUtils._
+import sjs.JSSymUtils.*
 import util.Store
 
 object Memoize {
diff --git a/compiler/src/dotty/tools/dotc/transform/Mixin.scala b/compiler/src/dotty/tools/dotc/transform/Mixin.scala
index 5a7827be2f49..fdab94808ef1 100644
--- a/compiler/src/dotty/tools/dotc/transform/Mixin.scala
+++ b/compiler/src/dotty/tools/dotc/transform/Mixin.scala
@@ -2,20 +2,20 @@ package dotty.tools
 package dotc
 package transform
 
-import core._
-import MegaPhase._
-import Contexts._
-import Flags._
-import Symbols._
-import SymDenotations._
-import Types._
-import Decorators._
-import DenotTransformers._
-import StdNames._
-import Names._
-import NameKinds._
-import NameOps._
-import ast.Trees._
+import core.*
+import MegaPhase.*
+import Contexts.*
+import Flags.*
+import Symbols.*
+import SymDenotations.*
+import Types.*
+import Decorators.*
+import DenotTransformers.*
+import StdNames.*
+import Names.*
+import NameKinds.*
+import NameOps.*
+import ast.Trees.*
 
 object Mixin {
   val name: String = "mixin"
diff --git a/compiler/src/dotty/tools/dotc/transform/MixinOps.scala b/compiler/src/dotty/tools/dotc/transform/MixinOps.scala
index 7356e3169028..5677667f844e 100644
--- a/compiler/src/dotty/tools/dotc/transform/MixinOps.scala
+++ b/compiler/src/dotty/tools/dotc/transform/MixinOps.scala
@@ -1,15 +1,15 @@
 package dotty.tools.dotc
 package transform
 
-import core._
-import Symbols._
-import Types._
-import Contexts._
-import DenotTransformers._
-import Flags._
-import util.Spans._
-import StdNames._
-import NameOps._
+import core.*
+import Symbols.*
+import Types.*
+import Contexts.*
+import DenotTransformers.*
+import Flags.*
+import util.Spans.*
+import StdNames.*
+import NameOps.*
 import typer.Nullables
 
 class MixinOps(cls: ClassSymbol, thisPhase: DenotTransformer)(using Context) {
diff --git a/compiler/src/dotty/tools/dotc/transform/MoveStatics.scala b/compiler/src/dotty/tools/dotc/transform/MoveStatics.scala
index 03504f6c1274..fcc1c1802607 100644
--- a/compiler/src/dotty/tools/dotc/transform/MoveStatics.scala
+++ b/compiler/src/dotty/tools/dotc/transform/MoveStatics.scala
@@ -1,19 +1,19 @@
 package dotty.tools.dotc
 package transform
 
-import core._
-import Flags._
-import Contexts._
-import Symbols._
+import core.*
+import Flags.*
+import Contexts.*
+import Symbols.*
 import DenotTransformers.SymTransformer
 import Types.MethodType
 import Annotations.Annotation
 import SymDenotations.SymDenotation
 import Names.Name
 import StdNames.nme
-import NameOps._
-import ast._
-import MegaPhase._
+import NameOps.*
+import ast.*
+import MegaPhase.*
 
 /** Move static methods from companion to the class itself */
 class MoveStatics extends MiniPhase with SymTransformer {
diff --git a/compiler/src/dotty/tools/dotc/transform/NonLocalReturns.scala b/compiler/src/dotty/tools/dotc/transform/NonLocalReturns.scala
index 2d10ccb45af3..7223c839e08f 100644
--- a/compiler/src/dotty/tools/dotc/transform/NonLocalReturns.scala
+++ b/compiler/src/dotty/tools/dotc/transform/NonLocalReturns.scala
@@ -3,15 +3,15 @@ package transform
 
 import dotty.tools.dotc.config.MigrationVersion
 
-import core._
-import Contexts._
-import Symbols._
-import Types._
-import Flags._
-import StdNames._
-import MegaPhase._
+import core.*
+import Contexts.*
+import Symbols.*
+import Types.*
+import Flags.*
+import StdNames.*
+import MegaPhase.*
 import NameKinds.NonLocalReturnKeyName
-import config.SourceVersion._
+import config.SourceVersion.*
 import Decorators.em
 
 object NonLocalReturns {
diff --git a/compiler/src/dotty/tools/dotc/transform/OverridingPairs.scala b/compiler/src/dotty/tools/dotc/transform/OverridingPairs.scala
index 1db17cfd0c40..28634b633e7d 100644
--- a/compiler/src/dotty/tools/dotc/transform/OverridingPairs.scala
+++ b/compiler/src/dotty/tools/dotc/transform/OverridingPairs.scala
@@ -5,15 +5,15 @@ package transform
 import scala.annotation.tailrec
 import scala.compiletime.uninitialized
 
-import core._
-import Flags._
-import Symbols._
-import Contexts._
-import Scopes._
-import Decorators._
+import core.*
+import Flags.*
+import Symbols.*
+import Contexts.*
+import Scopes.*
+import Decorators.*
 import Types.Type
 import NameKinds.DefaultGetterName
-import NullOpsDecorator._
+import NullOpsDecorator.*
 import collection.immutable.BitSet
 import cc.isCaptureChecking
 
diff --git a/compiler/src/dotty/tools/dotc/transform/ParamForwarding.scala b/compiler/src/dotty/tools/dotc/transform/ParamForwarding.scala
index 8302b1f417ee..f45c4cbe87bc 100644
--- a/compiler/src/dotty/tools/dotc/transform/ParamForwarding.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ParamForwarding.scala
@@ -2,15 +2,15 @@ package dotty.tools
 package dotc
 package transform
 
-import core._
-import Contexts._
-import Types._
-import Symbols._
-import Flags._
-import DenotTransformers._
-import StdNames._
-import Decorators._
-import MegaPhase._
+import core.*
+import Contexts.*
+import Types.*
+import Symbols.*
+import Flags.*
+import DenotTransformers.*
+import StdNames.*
+import Decorators.*
+import MegaPhase.*
 import NameKinds.ParamAccessorName
 
 /** For all private parameter accessors
diff --git a/compiler/src/dotty/tools/dotc/transform/PatternMatcher.scala b/compiler/src/dotty/tools/dotc/transform/PatternMatcher.scala
index 5b2370916a90..ae4f2470ea88 100644
--- a/compiler/src/dotty/tools/dotc/transform/PatternMatcher.scala
+++ b/compiler/src/dotty/tools/dotc/transform/PatternMatcher.scala
@@ -5,25 +5,25 @@ package transform
 import scala.annotation.tailrec
 import scala.collection.mutable
 
-import core._
-import MegaPhase._
-import Symbols._
-import Contexts._
-import Types._
-import StdNames._
-import NameOps._
+import core.*
+import MegaPhase.*
+import Symbols.*
+import Contexts.*
+import Types.*
+import StdNames.*
+import NameOps.*
 import patmat.SpaceEngine
-import util.Spans._
-import typer.Applications._
-import Annotations._
-import Flags._
-import Constants._
-import Decorators._
+import util.Spans.*
+import typer.Applications.*
+import Annotations.*
+import Flags.*
+import Constants.*
+import Decorators.*
 import NameKinds.{PatMatStdBinderName, PatMatAltsName, PatMatResultName}
 import config.Printers.patmatch
-import reporting._
-import ast._
-import util.Property._
+import reporting.*
+import ast.*
+import util.Property.*
 
 /** The pattern matching transform.
  *  After this phase, the only Match nodes remaining in the code are simple switches
diff --git a/compiler/src/dotty/tools/dotc/transform/PickleQuotes.scala b/compiler/src/dotty/tools/dotc/transform/PickleQuotes.scala
index a41f5e61ad74..f1bd7145cea2 100644
--- a/compiler/src/dotty/tools/dotc/transform/PickleQuotes.scala
+++ b/compiler/src/dotty/tools/dotc/transform/PickleQuotes.scala
@@ -3,26 +3,26 @@ package transform
 
 import dotty.tools.dotc.ast.tpd
 import dotty.tools.dotc.ast.untpd
-import dotty.tools.dotc.config.ScalaRelease._
-import dotty.tools.dotc.core.Annotations._
-import dotty.tools.dotc.core.StdNames._
+import dotty.tools.dotc.config.ScalaRelease.*
+import dotty.tools.dotc.core.Annotations.*
+import dotty.tools.dotc.core.StdNames.*
 import dotty.tools.dotc.inlines.Inlines
-import dotty.tools.dotc.quoted._
+import dotty.tools.dotc.quoted.*
 
 import scala.annotation.constructorOnly
 import scala.collection.mutable
 
-import core._
-import Decorators._
-import Flags._
-import Types._
-import Contexts._
-import Symbols._
-import Constants._
-import ast.Trees._
+import core.*
+import Decorators.*
+import Flags.*
+import Types.*
+import Contexts.*
+import Symbols.*
+import Constants.*
+import ast.Trees.*
 import ast.untpd
 import ast.TreeTypeMap
-import NameKinds._
+import NameKinds.*
 
 /** Translates quoted terms and types to `unpickleExprV2` or `unpickleType` method calls.
  *
diff --git a/compiler/src/dotty/tools/dotc/transform/Pickler.scala b/compiler/src/dotty/tools/dotc/transform/Pickler.scala
index 0f503ea444e8..38a991c4b94f 100644
--- a/compiler/src/dotty/tools/dotc/transform/Pickler.scala
+++ b/compiler/src/dotty/tools/dotc/transform/Pickler.scala
@@ -7,17 +7,17 @@ import dotty.tools.io.JarArchive
 
 import java.io.PrintStream
 
-import core._
-import Contexts._
-import Decorators._
-import tasty._
+import core.*
+import Contexts.*
+import Decorators.*
+import tasty.*
 import config.Printers.{noPrinter, pickling}
 import config.Feature
 import io.ClassfileWriterOps
 import StdNames.{str, nme}
-import Periods._
-import Phases._
-import Symbols._
+import Periods.*
+import Phases.*
+import Symbols.*
 import Flags.Module
 import reporting.{ThrowingReporter, Profile, Message}
 import collection.mutable
diff --git a/compiler/src/dotty/tools/dotc/transform/PostInlining.scala b/compiler/src/dotty/tools/dotc/transform/PostInlining.scala
index 32e8333e17c0..26c956d85d18 100644
--- a/compiler/src/dotty/tools/dotc/transform/PostInlining.scala
+++ b/compiler/src/dotty/tools/dotc/transform/PostInlining.scala
@@ -1,11 +1,11 @@
 package dotty.tools.dotc
 package transform
 
-import core._
-import Contexts._
+import core.*
+import Contexts.*
 import DenotTransformers.IdentityDenotTransformer
-import SyntheticMembers._
-import ast.tpd._
+import SyntheticMembers.*
+import ast.tpd.*
 
 /** A phase that adds mirror support for anonymous mirrors created at inlining. */
 class PostInlining extends MacroTransform, IdentityDenotTransformer:
diff --git a/compiler/src/dotty/tools/dotc/transform/PostTyper.scala b/compiler/src/dotty/tools/dotc/transform/PostTyper.scala
index a77c55043a15..84fb826fb6ab 100644
--- a/compiler/src/dotty/tools/dotc/transform/PostTyper.scala
+++ b/compiler/src/dotty/tools/dotc/transform/PostTyper.scala
@@ -12,27 +12,27 @@ import dotty.tools.dotc.typer.VarianceChecker
 
 import scala.collection.mutable
 
-import core._
+import core.*
 import typer.ErrorReporting.errorTree
-import Types._
-import Contexts._
-import Names._
-import Flags._
-import DenotTransformers._
-import Phases._
-import SymDenotations._
-import StdNames._
-import Annotations._
-import Trees._
-import Scopes._
-import Decorators._
-import Symbols._
-import NameOps._
+import Types.*
+import Contexts.*
+import Names.*
+import Flags.*
+import DenotTransformers.*
+import Phases.*
+import SymDenotations.*
+import StdNames.*
+import Annotations.*
+import Trees.*
+import Scopes.*
+import Decorators.*
+import Symbols.*
+import NameOps.*
 import ContextFunctionResults.annotateContextResults
 import config.Printers.typr
 import config.Feature
 import util.SrcPos
-import reporting._
+import reporting.*
 import NameKinds.WildcardParamName
 
 object PostTyper {
diff --git a/compiler/src/dotty/tools/dotc/transform/ProtectedAccessors.scala b/compiler/src/dotty/tools/dotc/transform/ProtectedAccessors.scala
index 938786e51d2d..7e4904635a5c 100644
--- a/compiler/src/dotty/tools/dotc/transform/ProtectedAccessors.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ProtectedAccessors.scala
@@ -3,11 +3,11 @@ package transform
 
 import dotty.tools.dotc.util.Property
 
-import core.Contexts._
-import core.NameKinds._
-import core.Symbols._
-import core.Flags._
-import core.Decorators._
+import core.Contexts.*
+import core.NameKinds.*
+import core.Symbols.*
+import core.Flags.*
+import core.Decorators.*
 import core.Names.TermName
 import MegaPhase.MiniPhase
 import config.Printers.transforms
diff --git a/compiler/src/dotty/tools/dotc/transform/PruneErasedDefs.scala b/compiler/src/dotty/tools/dotc/transform/PruneErasedDefs.scala
index 3aa057375513..b069347e8855 100644
--- a/compiler/src/dotty/tools/dotc/transform/PruneErasedDefs.scala
+++ b/compiler/src/dotty/tools/dotc/transform/PruneErasedDefs.scala
@@ -3,17 +3,17 @@ package transform
 
 import dotty.tools.dotc.core.Types.MethodType
 
-import core._
-import Contexts._
+import core.*
+import Contexts.*
 import DenotTransformers.SymTransformer
-import Flags._
-import SymDenotations._
-import Symbols._
+import Flags.*
+import SymDenotations.*
+import Symbols.*
 import typer.RefChecks
 import MegaPhase.MiniPhase
 import ast.tpd
 import config.Feature
-import Decorators._
+import Decorators.*
 
 /** This phase makes all erased term members of classes private so that they cannot
  *  conflict with non-erased members. This is needed so that subsequent phases like
diff --git a/compiler/src/dotty/tools/dotc/transform/PureStats.scala b/compiler/src/dotty/tools/dotc/transform/PureStats.scala
index e81c3412a369..e7568d6fe7b8 100644
--- a/compiler/src/dotty/tools/dotc/transform/PureStats.scala
+++ b/compiler/src/dotty/tools/dotc/transform/PureStats.scala
@@ -2,16 +2,16 @@ package dotty.tools.dotc
 package transform
 
 import ast.{Trees, tpd}
-import core._
-import core.Decorators._
-import MegaPhase._
-import Types._
-import Contexts._
-import Flags._
-import DenotTransformers._
-import Symbols._
-import StdNames._
-import Trees._
+import core.*
+import core.Decorators.*
+import MegaPhase.*
+import Types.*
+import Contexts.*
+import Flags.*
+import DenotTransformers.*
+import Symbols.*
+import StdNames.*
+import Trees.*
 
 object PureStats {
   val name: String = "pureStats"
diff --git a/compiler/src/dotty/tools/dotc/transform/Recheck.scala b/compiler/src/dotty/tools/dotc/transform/Recheck.scala
index 5f634fc229cd..7e34cf1a32ab 100644
--- a/compiler/src/dotty/tools/dotc/transform/Recheck.scala
+++ b/compiler/src/dotty/tools/dotc/transform/Recheck.scala
@@ -2,24 +2,24 @@ package dotty.tools
 package dotc
 package transform
 
-import core._
-import Symbols._
-import Contexts._
-import Types._
-import ContextOps._
-import Decorators._
-import SymDenotations._
-import Flags._
-import NameKinds._
+import core.*
+import Symbols.*
+import Contexts.*
+import Types.*
+import ContextOps.*
+import Decorators.*
+import SymDenotations.*
+import Flags.*
+import NameKinds.*
 import Denotations.{Denotation, SingleDenotation}
-import ast._
+import ast.*
 import Names.Name
 import Phases.Phase
 import DenotTransformers.{DenotTransformer, IdentityDenotTransformer, SymTransformer}
 import NamerOps.{methodType, linkConstructorParams}
 import NullOpsDecorator.stripNull
 import typer.ErrorReporting.err
-import typer.ProtoTypes._
+import typer.ProtoTypes.*
 import typer.TypeAssigner.seqLitType
 import typer.ConstFold
 import typer.ErrorReporting.{Addenda, NothingToAdd}
diff --git a/compiler/src/dotty/tools/dotc/transform/ReifiedReflect.scala b/compiler/src/dotty/tools/dotc/transform/ReifiedReflect.scala
index 61c0d219479e..92ca22d680c0 100644
--- a/compiler/src/dotty/tools/dotc/transform/ReifiedReflect.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ReifiedReflect.scala
@@ -2,22 +2,22 @@ package dotty.tools.dotc
 package transform
 
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core.Annotations._
-import dotty.tools.dotc.core.Names._
-import dotty.tools.dotc.core.StdNames._
-import dotty.tools.dotc.quoted._
+import dotty.tools.dotc.core.Annotations.*
+import dotty.tools.dotc.core.Names.*
+import dotty.tools.dotc.core.StdNames.*
+import dotty.tools.dotc.quoted.*
 
 import scala.annotation.constructorOnly
 import scala.collection.mutable
 
-import core._
-import Decorators._
-import Flags._
-import Types._
-import Contexts._
-import Symbols._
-import NameKinds._
-import tpd._
+import core.*
+import Decorators.*
+import Flags.*
+import Types.*
+import Contexts.*
+import Symbols.*
+import NameKinds.*
+import tpd.*
 
 /** Helper methods to construct trees calling methods in `Quotes.reflect` based on the current `quotes` tree */
 trait ReifiedReflect:
diff --git a/compiler/src/dotty/tools/dotc/transform/RepeatableAnnotations.scala b/compiler/src/dotty/tools/dotc/transform/RepeatableAnnotations.scala
index 3b1aa8c2e636..9b5473c36522 100644
--- a/compiler/src/dotty/tools/dotc/transform/RepeatableAnnotations.scala
+++ b/compiler/src/dotty/tools/dotc/transform/RepeatableAnnotations.scala
@@ -3,16 +3,16 @@ package transform
 
 import scala.collection.mutable
 
-import core._
-import ast.tpd._
-import Contexts._
-import MegaPhase._
-import Annotations._
+import core.*
+import ast.tpd.*
+import Contexts.*
+import MegaPhase.*
+import Annotations.*
 import Symbols.defn
-import Constants._
-import Types._
-import Decorators._
-import Flags._
+import Constants.*
+import Types.*
+import Decorators.*
+import Flags.*
 
 class RepeatableAnnotations extends MiniPhase:
 
diff --git a/compiler/src/dotty/tools/dotc/transform/ResolveSuper.scala b/compiler/src/dotty/tools/dotc/transform/ResolveSuper.scala
index 749bb37202e4..8a15c5b50b12 100644
--- a/compiler/src/dotty/tools/dotc/transform/ResolveSuper.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ResolveSuper.scala
@@ -1,18 +1,18 @@
 package dotty.tools.dotc
 package transform
 
-import core._
-import MegaPhase._
-import Contexts._
-import Flags._
-import Symbols._
-import Decorators._
-import DenotTransformers._
-import Names._
-import NameOps._
-import NameKinds._
-import NullOpsDecorator._
-import ResolveSuper._
+import core.*
+import MegaPhase.*
+import Contexts.*
+import Flags.*
+import Symbols.*
+import Decorators.*
+import DenotTransformers.*
+import Names.*
+import NameOps.*
+import NameKinds.*
+import NullOpsDecorator.*
+import ResolveSuper.*
 import reporting.IllegalSuperAccessor
 
 /** This phase implements super accessors in classes that need them.
diff --git a/compiler/src/dotty/tools/dotc/transform/RestoreScopes.scala b/compiler/src/dotty/tools/dotc/transform/RestoreScopes.scala
index 19e754c793a0..e66f5e4b37b8 100644
--- a/compiler/src/dotty/tools/dotc/transform/RestoreScopes.scala
+++ b/compiler/src/dotty/tools/dotc/transform/RestoreScopes.scala
@@ -1,11 +1,11 @@
 package dotty.tools.dotc
 package transform
 
-import core._
+import core.*
 import DenotTransformers.IdentityDenotTransformer
-import Contexts._
-import Symbols._
-import Scopes._
+import Contexts.*
+import Symbols.*
+import Scopes.*
 import MegaPhase.MiniPhase
 
 /** The preceding lambda lift and flatten phases move symbols to different scopes
diff --git a/compiler/src/dotty/tools/dotc/transform/SelectStatic.scala b/compiler/src/dotty/tools/dotc/transform/SelectStatic.scala
index 967286dd9ce6..08cd1eb30d0f 100644
--- a/compiler/src/dotty/tools/dotc/transform/SelectStatic.scala
+++ b/compiler/src/dotty/tools/dotc/transform/SelectStatic.scala
@@ -2,12 +2,12 @@ package dotty.tools.dotc
 package transform
 
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.*
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.DenotTransformers.IdentityDenotTransformer
-import dotty.tools.dotc.core.Flags._
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.core._
-import dotty.tools.dotc.transform.MegaPhase._
+import dotty.tools.dotc.core.Flags.*
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.transform.MegaPhase.*
 
 
 /** Removes `Select`s that would be compiled into `GetStatic`.
diff --git a/compiler/src/dotty/tools/dotc/transform/SeqLiterals.scala b/compiler/src/dotty/tools/dotc/transform/SeqLiterals.scala
index b3672e1e7d2a..53efa4863974 100644
--- a/compiler/src/dotty/tools/dotc/transform/SeqLiterals.scala
+++ b/compiler/src/dotty/tools/dotc/transform/SeqLiterals.scala
@@ -1,10 +1,10 @@
 package dotty.tools.dotc
 package transform
 
-import dotty.tools.dotc.transform.MegaPhase._
+import dotty.tools.dotc.transform.MegaPhase.*
 
-import core._
-import Contexts._
+import core.*
+import Contexts.*
 
 /** A transformer that eliminates SeqLiteral's, transforming `SeqLiteral(elems)` to an operation
  *  equivalent to
diff --git a/compiler/src/dotty/tools/dotc/transform/SetRootTree.scala b/compiler/src/dotty/tools/dotc/transform/SetRootTree.scala
index d17dbbecc555..f62b1f5f01f2 100644
--- a/compiler/src/dotty/tools/dotc/transform/SetRootTree.scala
+++ b/compiler/src/dotty/tools/dotc/transform/SetRootTree.scala
@@ -1,7 +1,7 @@
 package dotty.tools.dotc.transform
 
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.Phases.Phase
 
 /** Set the `rootTreeOrProvider` property of class symbols. */
diff --git a/compiler/src/dotty/tools/dotc/transform/SpecializeApplyMethods.scala b/compiler/src/dotty/tools/dotc/transform/SpecializeApplyMethods.scala
index aaa4d50def03..fcd87d166e59 100644
--- a/compiler/src/dotty/tools/dotc/transform/SpecializeApplyMethods.scala
+++ b/compiler/src/dotty/tools/dotc/transform/SpecializeApplyMethods.scala
@@ -3,19 +3,19 @@ package transform
 
 import scala.collection.mutable
 
-import ast.Trees._
+import ast.Trees.*
 import ast.tpd
-import core._
-import Contexts._
-import Types._
-import Decorators._
-import Symbols._
-import DenotTransformers._
-import SymDenotations._
-import Scopes._
-import StdNames._
-import NameOps._
-import Names._
+import core.*
+import Contexts.*
+import Types.*
+import Decorators.*
+import Symbols.*
+import DenotTransformers.*
+import SymDenotations.*
+import Scopes.*
+import StdNames.*
+import NameOps.*
+import Names.*
 import MegaPhase.MiniPhase
 
 
diff --git a/compiler/src/dotty/tools/dotc/transform/SpecializeFunctions.scala b/compiler/src/dotty/tools/dotc/transform/SpecializeFunctions.scala
index 83f74fc50eb1..a80f3572afe8 100644
--- a/compiler/src/dotty/tools/dotc/transform/SpecializeFunctions.scala
+++ b/compiler/src/dotty/tools/dotc/transform/SpecializeFunctions.scala
@@ -1,19 +1,19 @@
 package dotty.tools.dotc
 package transform
 
-import ast.Trees._
+import ast.Trees.*
 import ast.tpd
-import core._
-import Contexts._
-import Types._
-import Decorators._
-import Symbols._
-import DenotTransformers._
-import SymDenotations._
-import Scopes._
-import StdNames._
-import NameOps._
-import Names._
+import core.*
+import Contexts.*
+import Types.*
+import Decorators.*
+import Symbols.*
+import DenotTransformers.*
+import SymDenotations.*
+import Scopes.*
+import StdNames.*
+import NameOps.*
+import Names.*
 import MegaPhase.MiniPhase
 
 
diff --git a/compiler/src/dotty/tools/dotc/transform/SpecializeTuples.scala b/compiler/src/dotty/tools/dotc/transform/SpecializeTuples.scala
index abe2c4c35627..6da2813ca128 100644
--- a/compiler/src/dotty/tools/dotc/transform/SpecializeTuples.scala
+++ b/compiler/src/dotty/tools/dotc/transform/SpecializeTuples.scala
@@ -2,19 +2,19 @@ package dotty.tools
 package dotc
 package transform
 
-import ast.Trees._
+import ast.Trees.*
 import ast.tpd
-import core._
-import Contexts._
-import Types._
-import Decorators._
-import Symbols._
-import DenotTransformers._
-import SymDenotations._
-import Scopes._
-import StdNames._
-import NameOps._
-import Names._
+import core.*
+import Contexts.*
+import Types.*
+import Decorators.*
+import Symbols.*
+import DenotTransformers.*
+import SymDenotations.*
+import Scopes.*
+import StdNames.*
+import NameOps.*
+import Names.*
 import MegaPhase.MiniPhase
 import inlines.Inliner.isElideableExpr
 
diff --git a/compiler/src/dotty/tools/dotc/transform/Splicer.scala b/compiler/src/dotty/tools/dotc/transform/Splicer.scala
index 0169f480d0d3..463511b8becb 100644
--- a/compiler/src/dotty/tools/dotc/transform/Splicer.scala
+++ b/compiler/src/dotty/tools/dotc/transform/Splicer.scala
@@ -3,17 +3,17 @@ package transform
 
 import dotty.tools.dotc.ast.tpd
 import dotty.tools.dotc.core.Constants.Constant
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Decorators._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Decorators.*
 import dotty.tools.dotc.core.Denotations.staticRef
-import dotty.tools.dotc.core.Flags._
+import dotty.tools.dotc.core.Flags.*
 import dotty.tools.dotc.core.NameKinds
 import dotty.tools.dotc.core.NameKinds.FlatName
 import dotty.tools.dotc.core.Names.Name
-import dotty.tools.dotc.core.StdNames._
-import dotty.tools.dotc.core.Symbols._
+import dotty.tools.dotc.core.StdNames.*
+import dotty.tools.dotc.core.Symbols.*
 import dotty.tools.dotc.core.TypeErasure
-import dotty.tools.dotc.core.Types._
+import dotty.tools.dotc.core.Types.*
 import dotty.tools.dotc.quoted.Interpreter
 import dotty.tools.dotc.quoted.PickledQuotes
 import dotty.tools.dotc.quoted.QuoteUtils
@@ -23,10 +23,10 @@ import dotty.tools.repl.AbstractFileClassLoader
 import java.io.PrintWriter
 import java.io.StringWriter
 import java.lang.reflect.InvocationTargetException
-import java.lang.reflect.{Method => JLRMethod}
+import java.lang.reflect.Method as JLRMethod
 import scala.language.unsafeNulls
 import scala.quoted.Quotes
-import scala.quoted.runtime.impl._
+import scala.quoted.runtime.impl.*
 import scala.reflect.ClassTag
 import scala.util.control.NonFatal
 
diff --git a/compiler/src/dotty/tools/dotc/transform/Splicing.scala b/compiler/src/dotty/tools/dotc/transform/Splicing.scala
index d2abd0c5d572..ccc32c34a957 100644
--- a/compiler/src/dotty/tools/dotc/transform/Splicing.scala
+++ b/compiler/src/dotty/tools/dotc/transform/Splicing.scala
@@ -2,29 +2,29 @@ package dotty.tools.dotc
 package transform
 
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.config.ScalaRelease._
-import dotty.tools.dotc.core.Annotations._
-import dotty.tools.dotc.core.Names._
-import dotty.tools.dotc.core.StdNames._
-import dotty.tools.dotc.quoted._
+import dotty.tools.dotc.config.ScalaRelease.*
+import dotty.tools.dotc.core.Annotations.*
+import dotty.tools.dotc.core.Names.*
+import dotty.tools.dotc.core.StdNames.*
+import dotty.tools.dotc.quoted.*
 import dotty.tools.dotc.staging.QuoteTypeTags
-import dotty.tools.dotc.staging.QuoteTypeTags._
-import dotty.tools.dotc.staging.StagingLevel._
+import dotty.tools.dotc.staging.QuoteTypeTags.*
+import dotty.tools.dotc.staging.StagingLevel.*
 
 import scala.annotation.constructorOnly
 import scala.collection.mutable
 
-import core._
-import Decorators._
-import Flags._
-import Types._
-import Contexts._
-import Symbols._
-import Constants._
-import ast.Trees._
+import core.*
+import Decorators.*
+import Flags.*
+import Types.*
+import Contexts.*
+import Symbols.*
+import Constants.*
+import ast.Trees.*
 import ast.{TreeTypeMap, untpd}
-import util.Spans._
-import NameKinds._
+import util.Spans.*
+import NameKinds.*
 
 object Splicing:
   val name: String = "splicing"
diff --git a/compiler/src/dotty/tools/dotc/transform/Staging.scala b/compiler/src/dotty/tools/dotc/transform/Staging.scala
index 578fcd0271eb..7b7b7a11c1f1 100644
--- a/compiler/src/dotty/tools/dotc/transform/Staging.scala
+++ b/compiler/src/dotty/tools/dotc/transform/Staging.scala
@@ -2,16 +2,16 @@ package dotty.tools.dotc
 package transform
 
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Decorators._
-import dotty.tools.dotc.core.Flags._
-import dotty.tools.dotc.core.Phases._
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.core.Types._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Decorators.*
+import dotty.tools.dotc.core.Flags.*
+import dotty.tools.dotc.core.Phases.*
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.core.Types.*
 import dotty.tools.dotc.inlines.Inlines
 import dotty.tools.dotc.staging.CrossStageSafety
 import dotty.tools.dotc.staging.HealType
-import dotty.tools.dotc.staging.StagingLevel._
+import dotty.tools.dotc.staging.StagingLevel.*
 import dotty.tools.dotc.util.SrcPos
 
 /** Checks that staging level consistency holds and heals types used in higher levels.
diff --git a/compiler/src/dotty/tools/dotc/transform/SuperAccessors.scala b/compiler/src/dotty/tools/dotc/transform/SuperAccessors.scala
index e1bb7533874c..518ae171161d 100644
--- a/compiler/src/dotty/tools/dotc/transform/SuperAccessors.scala
+++ b/compiler/src/dotty/tools/dotc/transform/SuperAccessors.scala
@@ -8,18 +8,18 @@ import dotty.tools.dotc.ast.tpd
 import scala.collection.mutable
 
 import ValueClasses.isMethodWithExtension
-import core._
-import Contexts._
-import Flags._
-import Symbols._
-import Names._
-import StdNames._
-import NameOps._
-import Trees._
+import core.*
+import Contexts.*
+import Flags.*
+import Symbols.*
+import Names.*
+import StdNames.*
+import NameOps.*
+import Trees.*
 import DenotTransformers.DenotTransformer
-import Symbols._
-import util.Spans._
-import Decorators._
+import Symbols.*
+import util.Spans.*
+import Decorators.*
 import NameKinds.{ SuperAccessorName, ExpandPrefixName }
 
 /** This class adds super accessors for all super calls that either
diff --git a/compiler/src/dotty/tools/dotc/transform/SyntheticMembers.scala b/compiler/src/dotty/tools/dotc/transform/SyntheticMembers.scala
index 27b61c2ad6d5..15018b969aa0 100644
--- a/compiler/src/dotty/tools/dotc/transform/SyntheticMembers.scala
+++ b/compiler/src/dotty/tools/dotc/transform/SyntheticMembers.scala
@@ -1,24 +1,24 @@
 package dotty.tools.dotc
 package transform
 
-import core._
-import Symbols._
-import Types._
-import Contexts._
-import Names._
-import StdNames._
-import Constants._
-import Flags._
-import DenotTransformers._
-import Decorators._
-import NameOps._
+import core.*
+import Symbols.*
+import Types.*
+import Contexts.*
+import Names.*
+import StdNames.*
+import Constants.*
+import Flags.*
+import DenotTransformers.*
+import Decorators.*
+import NameOps.*
 import Annotations.Annotation
 import typer.ProtoTypes.constrained
 import ast.untpd
 import util.Property
 import util.Spans.Span
 import config.Printers.derive
-import NullOpsDecorator._
+import NullOpsDecorator.*
 
 object SyntheticMembers {
 
diff --git a/compiler/src/dotty/tools/dotc/transform/TailRec.scala b/compiler/src/dotty/tools/dotc/transform/TailRec.scala
index 326f3195d267..9545e4155a29 100644
--- a/compiler/src/dotty/tools/dotc/transform/TailRec.scala
+++ b/compiler/src/dotty/tools/dotc/transform/TailRec.scala
@@ -7,15 +7,15 @@ import scala.compiletime.uninitialized
 
 import ast.{TreeTypeMap, tpd}
 import config.Printers.tailrec
-import core._
-import Contexts._
-import Flags._
-import Symbols._
+import core.*
+import Contexts.*
+import Flags.*
+import Symbols.*
 import Decorators.em
 import Constants.Constant
 import NameKinds.{TailLabelName, TailLocalName, TailTempName}
 import StdNames.nme
-import reporting._
+import reporting.*
 import transform.MegaPhase.MiniPhase
 import util.LinearSet
 
diff --git a/compiler/src/dotty/tools/dotc/transform/TransformWildcards.scala b/compiler/src/dotty/tools/dotc/transform/TransformWildcards.scala
index 68da2077fafb..2be41ba208f1 100644
--- a/compiler/src/dotty/tools/dotc/transform/TransformWildcards.scala
+++ b/compiler/src/dotty/tools/dotc/transform/TransformWildcards.scala
@@ -1,9 +1,9 @@
 package dotty.tools.dotc
 package transform
 
-import MegaPhase._
-import core.DenotTransformers._
-import core.Contexts._
+import MegaPhase.*
+import core.DenotTransformers.*
+import core.Contexts.*
 import ast.tpd
 
 /** This phase transforms wildcards in valdefs with their default value.
diff --git a/compiler/src/dotty/tools/dotc/transform/TreeChecker.scala b/compiler/src/dotty/tools/dotc/transform/TreeChecker.scala
index 1429467541ea..b1bee878fc37 100644
--- a/compiler/src/dotty/tools/dotc/transform/TreeChecker.scala
+++ b/compiler/src/dotty/tools/dotc/transform/TreeChecker.scala
@@ -7,24 +7,24 @@ import dotty.tools.backend.jvm.DottyBackendInterface.symExtensions
 import scala.util.control.NonFatal
 
 import core.Names.Name
-import core.DenotTransformers._
-import core.SymDenotations._
-import core.Contexts._
-import core.Symbols._
-import core.Types._
-import core.Flags._
-import core.StdNames._
+import core.DenotTransformers.*
+import core.SymDenotations.*
+import core.Contexts.*
+import core.Symbols.*
+import core.Types.*
+import core.Flags.*
+import core.StdNames.*
 import core.NameKinds.{DocArtifactName, OuterSelectName}
-import core.Decorators._
-import core.Phases._
+import core.Decorators.*
+import core.Phases.*
 import core.Mode
-import typer._
-import reporting._
-import ast.Trees._
+import typer.*
+import reporting.*
+import ast.Trees.*
 import ast.{tpd, untpd}
-import util.Chars._
+import util.Chars.*
 import collection.mutable
-import ProtoTypes._
+import ProtoTypes.*
 import staging.StagingLevel
 import inlines.Inlines.inInlineMethod
 
diff --git a/compiler/src/dotty/tools/dotc/transform/TreeExtractors.scala b/compiler/src/dotty/tools/dotc/transform/TreeExtractors.scala
index d028e695653e..80f380904e1c 100644
--- a/compiler/src/dotty/tools/dotc/transform/TreeExtractors.scala
+++ b/compiler/src/dotty/tools/dotc/transform/TreeExtractors.scala
@@ -2,13 +2,13 @@ package dotty.tools.dotc
 package transform
 
 import ast.{Trees, tpd}
-import core._
-import Contexts._
-import Trees._
-import Types._
-import StdNames._
-import Symbols._
-import ValueClasses._
+import core.*
+import Contexts.*
+import Trees.*
+import Types.*
+import StdNames.*
+import Symbols.*
+import ValueClasses.*
 
 object TreeExtractors {
   import tpd.*
diff --git a/compiler/src/dotty/tools/dotc/transform/TryCatchPatterns.scala b/compiler/src/dotty/tools/dotc/transform/TryCatchPatterns.scala
index 409e93e39b95..42508b4b7fba 100644
--- a/compiler/src/dotty/tools/dotc/transform/TryCatchPatterns.scala
+++ b/compiler/src/dotty/tools/dotc/transform/TryCatchPatterns.scala
@@ -1,14 +1,14 @@
 package dotty.tools.dotc
 package transform
 
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.Flags
 import dotty.tools.dotc.transform.MegaPhase.MiniPhase
 import dotty.tools.dotc.util.Spans.Span
 
-import core.Symbols._
-import core.StdNames._
-import core.Types._
+import core.Symbols.*
+import core.StdNames.*
+import core.Types.*
 import core.NameKinds.ExceptionBinderName
 
 /** Compiles the cases that can not be handled by primitive catch cases as a common pattern match.
diff --git a/compiler/src/dotty/tools/dotc/transform/TupleOptimizations.scala b/compiler/src/dotty/tools/dotc/transform/TupleOptimizations.scala
index 0525d53fd632..d0b351d55a6a 100644
--- a/compiler/src/dotty/tools/dotc/transform/TupleOptimizations.scala
+++ b/compiler/src/dotty/tools/dotc/transform/TupleOptimizations.scala
@@ -3,15 +3,15 @@ package transform
 
 import dotty.tools.dotc.ast.tpd
 
-import core._
-import Contexts._
-import Decorators._
-import Definitions._
-import DenotTransformers._
-import StdNames._
-import Symbols._
-import MegaPhase._
-import Types._
+import core.*
+import Contexts.*
+import Decorators.*
+import Definitions.*
+import DenotTransformers.*
+import StdNames.*
+import Symbols.*
+import MegaPhase.*
+import Types.*
 
 /** Optimize generic operations on tuples */
 class TupleOptimizations extends MiniPhase with IdentityDenotTransformer {
diff --git a/compiler/src/dotty/tools/dotc/transform/UncacheGivenAliases.scala b/compiler/src/dotty/tools/dotc/transform/UncacheGivenAliases.scala
index e76409b827f7..6e02ea7c227c 100644
--- a/compiler/src/dotty/tools/dotc/transform/UncacheGivenAliases.scala
+++ b/compiler/src/dotty/tools/dotc/transform/UncacheGivenAliases.scala
@@ -1,12 +1,12 @@
 package dotty.tools.dotc
 package transform
 
-import MegaPhase._
+import MegaPhase.*
 import core.DenotTransformers.{IdentityDenotTransformer}
-import core.Symbols._
-import core.Contexts._
-import core.Types._
-import core.Flags._
+import core.Symbols.*
+import core.Contexts.*
+import core.Types.*
+import core.Flags.*
 import ast.tpd
 
 object UncacheGivenAliases:
diff --git a/compiler/src/dotty/tools/dotc/transform/UninitializedDefs.scala b/compiler/src/dotty/tools/dotc/transform/UninitializedDefs.scala
index d6be1e8edcbf..f22fc53e9b6e 100644
--- a/compiler/src/dotty/tools/dotc/transform/UninitializedDefs.scala
+++ b/compiler/src/dotty/tools/dotc/transform/UninitializedDefs.scala
@@ -1,10 +1,10 @@
 package dotty.tools.dotc
 package transform
 
-import core._
-import Contexts._
-import Flags._
-import Symbols._
+import core.*
+import Contexts.*
+import Flags.*
+import Symbols.*
 import MegaPhase.MiniPhase
 import StdNames.nme
 import ast.tpd
diff --git a/compiler/src/dotty/tools/dotc/transform/VCElideAllocations.scala b/compiler/src/dotty/tools/dotc/transform/VCElideAllocations.scala
index f8fcf791517e..e1930ef44f0f 100644
--- a/compiler/src/dotty/tools/dotc/transform/VCElideAllocations.scala
+++ b/compiler/src/dotty/tools/dotc/transform/VCElideAllocations.scala
@@ -2,16 +2,16 @@ package dotty.tools.dotc
 package transform
 
 import ast.tpd
-import core._
-import Contexts._
-import Symbols._
-import Types._
-import Flags._
-import Phases._
-import DenotTransformers._
-import MegaPhase._
-import TreeExtractors._
-import ValueClasses._
+import core.*
+import Contexts.*
+import Symbols.*
+import Types.*
+import Flags.*
+import Phases.*
+import DenotTransformers.*
+import MegaPhase.*
+import TreeExtractors.*
+import ValueClasses.*
 
 /** This phase elides unnecessary value class allocations
  *
diff --git a/compiler/src/dotty/tools/dotc/transform/VCInlineMethods.scala b/compiler/src/dotty/tools/dotc/transform/VCInlineMethods.scala
index 1189d46f48b4..975d18791c1c 100644
--- a/compiler/src/dotty/tools/dotc/transform/VCInlineMethods.scala
+++ b/compiler/src/dotty/tools/dotc/transform/VCInlineMethods.scala
@@ -3,14 +3,14 @@ package dotc
 package transform
 
 import ast.{Trees, tpd}
-import core._
-import Contexts._
-import Trees._
-import Types._
-import DenotTransformers._
-import MegaPhase._
-import ExtensionMethods._
-import ValueClasses._
+import core.*
+import Contexts.*
+import Trees.*
+import Types.*
+import DenotTransformers.*
+import MegaPhase.*
+import ExtensionMethods.*
+import ValueClasses.*
 
 
 /** This phase inlines calls to methods of value classes.
diff --git a/compiler/src/dotty/tools/dotc/transform/ValueClasses.scala b/compiler/src/dotty/tools/dotc/transform/ValueClasses.scala
index df9244038c58..5cdd5d8ded43 100644
--- a/compiler/src/dotty/tools/dotc/transform/ValueClasses.scala
+++ b/compiler/src/dotty/tools/dotc/transform/ValueClasses.scala
@@ -1,13 +1,13 @@
 package dotty.tools.dotc
 package transform
 
-import core._
-import Types._
-import Symbols._
-import Contexts._
-import Phases._
-import Flags._
-import StdNames._
+import core.*
+import Types.*
+import Symbols.*
+import Contexts.*
+import Phases.*
+import Flags.*
+import StdNames.*
 
 /** Methods that apply to user-defined value classes */
 object ValueClasses {
diff --git a/compiler/src/dotty/tools/dotc/transform/YCheckPositions.scala b/compiler/src/dotty/tools/dotc/transform/YCheckPositions.scala
index 2fa5104ec98b..20ad82c72f76 100644
--- a/compiler/src/dotty/tools/dotc/transform/YCheckPositions.scala
+++ b/compiler/src/dotty/tools/dotc/transform/YCheckPositions.scala
@@ -3,12 +3,12 @@ package transform
 
 import dotty.tools.dotc.ast.tpd
 import dotty.tools.dotc.ast.untpd
-import dotty.tools.dotc.core.Contexts._
-import dotty.tools.dotc.core.Decorators._
-import dotty.tools.dotc.core.Flags._
+import dotty.tools.dotc.core.Contexts.*
+import dotty.tools.dotc.core.Decorators.*
+import dotty.tools.dotc.core.Flags.*
 import dotty.tools.dotc.core.Phases.Phase
 import dotty.tools.dotc.core.Phases.postTyperPhase
-import dotty.tools.dotc.core.Symbols._
+import dotty.tools.dotc.core.Symbols.*
 import dotty.tools.dotc.util.SourceFile
 
 /** Ycheck inlined positions */
diff --git a/compiler/src/dotty/tools/dotc/transform/init/Cache.scala b/compiler/src/dotty/tools/dotc/transform/init/Cache.scala
index c0bd48d4ce05..ed1b93f9d79b 100644
--- a/compiler/src/dotty/tools/dotc/transform/init/Cache.scala
+++ b/compiler/src/dotty/tools/dotc/transform/init/Cache.scala
@@ -2,8 +2,8 @@ package dotty.tools.dotc
 package transform
 package init
 
-import core._
-import Contexts._
+import core.*
+import Contexts.*
 import ast.tpd
 import tpd.Tree
 
diff --git a/compiler/src/dotty/tools/dotc/transform/init/Checker.scala b/compiler/src/dotty/tools/dotc/transform/init/Checker.scala
index 47ac8ed624b4..b368ee216d1a 100644
--- a/compiler/src/dotty/tools/dotc/transform/init/Checker.scala
+++ b/compiler/src/dotty/tools/dotc/transform/init/Checker.scala
@@ -2,21 +2,21 @@ package dotty.tools.dotc
 package transform
 package init
 
-import dotty.tools.dotc._
-import dotty.tools.dotc.core._
-import dotty.tools.dotc.transform._
+import dotty.tools.dotc.*
+import dotty.tools.dotc.core.*
+import dotty.tools.dotc.transform.*
 import dotty.tools.unsupported
 
 import scala.collection.mutable
 
 import ast.tpd
-import tpd._
-import Contexts._
-import Types._
-import Symbols._
-import StdNames._
-import Phases._
-import Semantic._
+import tpd.*
+import Contexts.*
+import Types.*
+import Symbols.*
+import StdNames.*
+import Phases.*
+import Semantic.*
 
 class Checker extends Phase:
 
diff --git a/compiler/src/dotty/tools/dotc/transform/init/Errors.scala b/compiler/src/dotty/tools/dotc/transform/init/Errors.scala
index 1f4bd475eebf..198bfceaa7a5 100644
--- a/compiler/src/dotty/tools/dotc/transform/init/Errors.scala
+++ b/compiler/src/dotty/tools/dotc/transform/init/Errors.scala
@@ -3,13 +3,13 @@ package dotc
 package transform
 package init
 
-import ast.tpd._
-import core._
+import ast.tpd.*
+import core.*
 import util.Property
 import util.SourcePosition
-import Types._
-import Symbols._
-import Contexts._
+import Types.*
+import Symbols.*
+import Contexts.*
 import Trace.Trace
 
 object Errors:
diff --git a/compiler/src/dotty/tools/dotc/transform/init/Trace.scala b/compiler/src/dotty/tools/dotc/transform/init/Trace.scala
index ea76f2cac67f..b30f84874969 100644
--- a/compiler/src/dotty/tools/dotc/transform/init/Trace.scala
+++ b/compiler/src/dotty/tools/dotc/transform/init/Trace.scala
@@ -4,11 +4,11 @@ package init
 
 import scala.collection.mutable
 
-import core._
-import Contexts._
-import ast.tpd._
+import core.*
+import Contexts.*
+import ast.tpd.*
 import util.SourcePosition
-import Decorators._
+import Decorators.*
 import printing.SyntaxHighlighting
 
 /** Logic related to evaluation trace for showing friendly error messages
diff --git a/compiler/src/dotty/tools/dotc/transform/localopt/FormatChecker.scala b/compiler/src/dotty/tools/dotc/transform/localopt/FormatChecker.scala
index c2943236a99b..4cb3cc3f36c5 100644
--- a/compiler/src/dotty/tools/dotc/transform/localopt/FormatChecker.scala
+++ b/compiler/src/dotty/tools/dotc/transform/localopt/FormatChecker.scala
@@ -1,16 +1,16 @@
 package dotty.tools.dotc
 package transform.localopt
 
-import dotty.tools.dotc.ast.tpd.{Match => _, _}
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.ast.tpd.{Match as _, *}
+import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.Phases.typerPhase
-import dotty.tools.dotc.core.Symbols._
-import dotty.tools.dotc.core.Types._
+import dotty.tools.dotc.core.Symbols.*
+import dotty.tools.dotc.core.Types.*
 import dotty.tools.dotc.util.Spans.Span
 
 import scala.annotation.tailrec
 import scala.collection.mutable.ListBuffer
-import scala.util.chaining._
+import scala.util.chaining.*
 import scala.util.matching.Regex.Match
 
 import PartialFunction.cond
diff --git a/compiler/src/dotty/tools/dotc/transform/localopt/FormatInterpolatorTransform.scala b/compiler/src/dotty/tools/dotc/transform/localopt/FormatInterpolatorTransform.scala
index 282c89687c3e..79d94c26c692 100644
--- a/compiler/src/dotty/tools/dotc/transform/localopt/FormatInterpolatorTransform.scala
+++ b/compiler/src/dotty/tools/dotc/transform/localopt/FormatInterpolatorTransform.scala
@@ -1,9 +1,9 @@
 package dotty.tools.dotc
 package transform.localopt
 
-import dotty.tools.dotc.ast.tpd._
+import dotty.tools.dotc.ast.tpd.*
 import dotty.tools.dotc.core.Constants.Constant
-import dotty.tools.dotc.core.Contexts._
+import dotty.tools.dotc.core.Contexts.*
 
 object FormatInterpolatorTransform: