scala · som-snytt · Jan 16, 2025 · Jan 16, 2025
diff --git a/compiler/src/dotty/tools/MainGenericCompiler.scala b/compiler/src/dotty/tools/MainGenericCompiler.scala
@@ -6,16 +6,7 @@ import scala.annotation.tailrec
 import scala.io.Source
 import scala.util.Try
 import java.io.File
-import java.lang.Thread
 import scala.annotation.internal.sharable
-import dotty.tools.dotc.util.ClasspathFromClassloader
-import dotty.tools.runner.ObjectRunner
-import dotty.tools.dotc.config.Properties.envOrNone
-import dotty.tools.io.Jar
-import dotty.tools.runner.ScalaClassLoader
-import java.nio.file.Paths
-import dotty.tools.dotc.config.CommandLineParser
-import dotty.tools.scripting.StringDriver
 
 enum CompileMode:
   case Guess

diff --git a/compiler/src/dotty/tools/backend/jvm/BCodeBodyBuilder.scala b/compiler/src/dotty/tools/backend/jvm/BCodeBodyBuilder.scala
@@ -8,7 +8,7 @@ import scala.annotation.{switch, tailrec}
 import scala.collection.mutable.SortedMap
 
 import scala.tools.asm
-import scala.tools.asm.{Handle, Opcodes}
+import scala.tools.asm.Opcodes
 import BCodeHelpers.InvokeStyle
 
 import dotty.tools.dotc.ast.tpd

diff --git a/compiler/src/dotty/tools/backend/jvm/BCodeHelpers.scala b/compiler/src/dotty/tools/backend/jvm/BCodeHelpers.scala
@@ -31,7 +31,6 @@ import dotty.tools.dotc.core.Types.*
 import dotty.tools.dotc.core.TypeErasure
 import dotty.tools.dotc.transform.GenericSignatures
 import dotty.tools.dotc.transform.ElimErasedValueType
-import dotty.tools.io.AbstractFile
 import dotty.tools.dotc.report
 
 import dotty.tools.backend.jvm.DottyBackendInterface.symExtensions
@@ -49,7 +48,7 @@ trait BCodeHelpers extends BCodeIdiomatic {
   import bTypes.*
   import tpd.*
   import coreBTypes.*
-  import int.{_, given}
+  import int.given
   import DottyBackendInterface.*
 
   // We need to access GenBCode phase to get access to post-processor components.
@@ -380,7 +379,6 @@ trait BCodeHelpers extends BCodeIdiomatic {
   } // end of trait BCAnnotGen
 
   trait BCJGenSigGen {
-    import int.given
 
     def getCurrentCUnit(): CompilationUnit
 

diff --git a/compiler/src/dotty/tools/backend/jvm/BCodeIdiomatic.scala b/compiler/src/dotty/tools/backend/jvm/BCodeIdiomatic.scala
@@ -21,7 +21,7 @@ trait BCodeIdiomatic {
   val int: DottyBackendInterface
   val bTypes: BTypesFromSymbols[int.type]
 
-  import int.{_, given}
+  import int.given
   import bTypes.*
   import coreBTypes.*
 

diff --git a/compiler/src/dotty/tools/backend/jvm/BCodeSkelBuilder.scala b/compiler/src/dotty/tools/backend/jvm/BCodeSkelBuilder.scala
@@ -29,7 +29,7 @@ import dotty.tools.dotc.report
  *
  */
 trait BCodeSkelBuilder extends BCodeHelpers {
-  import int.{_, given}
+  import int.given
   import DottyBackendInterface.{symExtensions, _}
   import tpd.*
   import bTypes.*

diff --git a/compiler/src/dotty/tools/backend/jvm/BTypesFromSymbols.scala b/compiler/src/dotty/tools/backend/jvm/BTypesFromSymbols.scala
@@ -4,8 +4,6 @@ package jvm
 
 import scala.tools.asm
 import scala.annotation.threadUnsafe
-import scala.collection.mutable
-import scala.collection.mutable.Clearable
 
 import dotty.tools.dotc.core.Flags.*
 import dotty.tools.dotc.core.Contexts.*
@@ -14,7 +12,6 @@ import dotty.tools.dotc.core.Symbols.*
 import dotty.tools.dotc.core.Phases.Phase
 
 import dotty.tools.dotc.core.StdNames
-import dotty.tools.dotc.core.Phases
 
 /**
  * This class mainly contains the method classBTypeFromSymbol, which extracts the necessary

diff --git a/compiler/src/dotty/tools/backend/jvm/BackendUtils.scala b/compiler/src/dotty/tools/backend/jvm/BackendUtils.scala
@@ -6,7 +6,6 @@ import scala.tools.asm.tree.InvokeDynamicInsnNode
 import asm.tree.ClassNode
 import scala.collection.mutable
 import scala.jdk.CollectionConverters.*
-import dotty.tools.dotc.report
 
 import scala.language.unsafeNulls
 
@@ -76,7 +75,6 @@ class BackendUtils(val postProcessor: PostProcessor) {
   */
   def addLambdaDeserialize(classNode: ClassNode, implMethodsArray: Array[Handle]): Unit = {
     import asm.Opcodes.*
-    import bTypes.*
     import coreBTypes.*
 
     val cw = classNode

diff --git a/compiler/src/dotty/tools/backend/jvm/ClassfileWriters.scala b/compiler/src/dotty/tools/backend/jvm/ClassfileWriters.scala
@@ -3,16 +3,14 @@ package dotty.tools.backend.jvm
 import java.io.{DataOutputStream, File, IOException, BufferedOutputStream, FileOutputStream}
 import java.nio.ByteBuffer
 import java.nio.channels.{ClosedByInterruptException, FileChannel}
-import java.nio.charset.StandardCharsets.UTF_8
 import java.nio.file.*
 import java.nio.file.attribute.FileAttribute
 import java.util
 import java.util.concurrent.ConcurrentHashMap
 import java.util.zip.{CRC32, Deflater, ZipEntry, ZipOutputStream}
 
-import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.Decorators.em
-import dotty.tools.io.{AbstractFile, PlainFile, VirtualFile}
+import dotty.tools.io.{AbstractFile, PlainFile}
 import dotty.tools.io.PlainFile.toPlainFile
 import BTypes.InternalName
 import scala.util.chaining.*

diff --git a/compiler/src/dotty/tools/backend/jvm/CodeGen.scala b/compiler/src/dotty/tools/backend/jvm/CodeGen.scala
@@ -5,10 +5,8 @@ import scala.language.unsafeNulls
 import dotty.tools.dotc.CompilationUnit
 import dotty.tools.dotc.ast.Trees.{PackageDef, ValDef}
 import dotty.tools.dotc.ast.tpd
-import dotty.tools.dotc.core.Phases.Phase
 
 import scala.collection.mutable
-import scala.jdk.CollectionConverters.*
 
 import dotty.tools.dotc.interfaces
 import dotty.tools.dotc.report
@@ -21,13 +19,10 @@ import Phases.*
 import Symbols.*
 import StdNames.nme
 
-import java.io.DataOutputStream
-import java.nio.channels.ClosedByInterruptException
 
 import dotty.tools.tasty.{ TastyBuffer, TastyHeaderUnpickler }
 import dotty.tools.dotc.core.tasty.TastyUnpickler
 
-import scala.tools.asm
 import scala.tools.asm.tree.*
 import tpd.*
 import dotty.tools.io.AbstractFile

diff --git a/compiler/src/dotty/tools/backend/jvm/CoreBTypes.scala b/compiler/src/dotty/tools/backend/jvm/CoreBTypes.scala
@@ -6,8 +6,6 @@ package jvm
 import dotty.tools.dotc.core.Symbols.*
 import dotty.tools.dotc.transform.Erasure
 import scala.tools.asm.{Handle, Opcodes}
-import dotty.tools.dotc.core.StdNames
-import BTypes.InternalName
 import PostProcessorFrontendAccess.Lazy
 
 abstract class CoreBTypes {
@@ -58,7 +56,6 @@ abstract class CoreBTypesFromSymbols[I <: DottyBackendInterface] extends CoreBTy
 
   import bTypes.*
   import DottyBackendInterface.*
-  import dotty.tools.dotc.core.Contexts.Context
   import frontendAccess.perRunLazy
   /**
    * Maps primitive types to their corresponding PrimitiveBType. The map is defined lexically above

diff --git a/compiler/src/dotty/tools/backend/jvm/DottyBackendInterface.scala b/compiler/src/dotty/tools/backend/jvm/DottyBackendInterface.scala
@@ -8,7 +8,6 @@ import dotty.tools.dotc.core.Flags.*
 import java.io.{File => _}
 
 import scala.reflect.ClassTag
-import dotty.tools.io.AbstractFile
 import dotty.tools.dotc.core.*
 import Contexts.*
 import Types.*

diff --git a/compiler/src/dotty/tools/backend/jvm/GenBCode.scala b/compiler/src/dotty/tools/backend/jvm/GenBCode.scala
@@ -10,10 +10,7 @@ import Symbols.*
 import dotty.tools.io.*
 import scala.collection.mutable
 import scala.compiletime.uninitialized
-import java.util.concurrent.TimeoutException
 
-import scala.concurrent.duration.Duration
-import scala.concurrent.Await
 
 class GenBCode extends Phase { self =>
 

diff --git a/compiler/src/dotty/tools/backend/jvm/GenericSignatureVisitor.scala b/compiler/src/dotty/tools/backend/jvm/GenericSignatureVisitor.scala
@@ -2,7 +2,7 @@ package dotty.tools.backend.jvm
 
 import scala.language.unsafeNulls
 
-import scala.tools.asm.{ClassReader, Type, Handle }
+import scala.tools.asm.{Type, Handle }
 import scala.tools.asm.tree.*
 
 import scala.collection.mutable

diff --git a/compiler/src/dotty/tools/backend/jvm/PostProcessor.scala b/compiler/src/dotty/tools/backend/jvm/PostProcessor.scala
@@ -2,8 +2,7 @@ package dotty.tools.backend.jvm
 
 import java.util.concurrent.ConcurrentHashMap
 
-import scala.collection.mutable.ListBuffer
-import dotty.tools.dotc.util.{SourcePosition, NoSourcePosition}
+import dotty.tools.dotc.util.SourcePosition
 import dotty.tools.io.AbstractFile
 import dotty.tools.dotc.core.Contexts.*
 import dotty.tools.dotc.core.Decorators.em

diff --git a/compiler/src/dotty/tools/backend/jvm/PostProcessorFrontendAccess.scala b/compiler/src/dotty/tools/backend/jvm/PostProcessorFrontendAccess.scala
@@ -1,13 +1,11 @@
 package dotty.tools.backend.jvm
 
-import scala.collection.mutable.{Clearable, HashSet}
+import scala.collection.mutable.HashSet
 import dotty.tools.dotc.util.*
 import dotty.tools.dotc.reporting.Message
 import dotty.tools.io.AbstractFile
-import java.util.{Collection => JCollection, Map => JMap}
 import dotty.tools.dotc.core.Contexts.Context
 import dotty.tools.dotc.report
-import dotty.tools.dotc.core.Phases
 import scala.compiletime.uninitialized
 
 /**

diff --git a/compiler/src/dotty/tools/backend/sjs/JSPositions.scala b/compiler/src/dotty/tools/backend/sjs/JSPositions.scala
@@ -64,7 +64,6 @@ class JSPositions()(using Context) {
     sourceAndSpan2irPos(sourcePos.source, sourcePos.span)
 
   private object span2irPosCache {
-    import dotty.tools.dotc.util.*
 
     private var lastDotcSource: SourceFile = null
     private var lastIRSource: ir.Position.SourceFile = null

diff --git a/compiler/src/dotty/tools/dotc/CompilationUnit.scala b/compiler/src/dotty/tools/dotc/CompilationUnit.scala
@@ -14,7 +14,6 @@ import ast.Trees.{Import, Ident}
 import typer.Nullables
 import core.Decorators.*
 import config.{SourceVersion, Feature}
-import StdNames.nme
 import scala.annotation.internal.sharable
 import scala.util.control.NoStackTrace
 import transform.MacroAnnotations.isMacroAnnotation

diff --git a/compiler/src/dotty/tools/dotc/Driver.scala b/compiler/src/dotty/tools/dotc/Driver.scala
@@ -9,7 +9,6 @@ import dotty.tools.dotc.ast.Positioned
 import dotty.tools.io.{AbstractFile, FileExtension}
 import reporting.*
 import core.Decorators.*
-import config.Feature
 
 import scala.util.control.NonFatal
 import fromtasty.{TASTYCompiler, TastyFileUtil}

diff --git a/compiler/src/dotty/tools/dotc/Run.scala b/compiler/src/dotty/tools/dotc/Run.scala
@@ -12,7 +12,7 @@ import typer.Typer
 import typer.ImportInfo.withRootImports
 import Decorators.*
 import io.AbstractFile
-import Phases.{unfusedPhases, Phase}
+import Phases.Phase
 
 import sbt.interfaces.ProgressCallback
 
@@ -22,17 +22,13 @@ import reporting.Diagnostic
 import reporting.Diagnostic.Warning
 import rewrites.Rewrites
 import profile.Profiler
-import printing.XprintMode
 import typer.ImplicitRunInfo
 import config.Feature
 import StdNames.nme
 
-import java.io.{BufferedWriter, OutputStreamWriter}
-import java.nio.charset.StandardCharsets
 
 import scala.collection.mutable
 import scala.util.control.NonFatal
-import scala.io.Codec
 
 import Run.Progress
 import scala.compiletime.uninitialized

diff --git a/compiler/src/dotty/tools/dotc/ast/Desugar.scala b/compiler/src/dotty/tools/dotc/ast/Desugar.scala
@@ -6,12 +6,11 @@ import core.*
 import util.Spans.*, Types.*, Contexts.*, Constants.*, Names.*, NameOps.*, Flags.*
 import Symbols.*, StdNames.*, Trees.*, ContextOps.*
 import Decorators.*
-import Annotations.Annotation
 import NameKinds.{UniqueName, ContextBoundParamName, ContextFunctionParamName, DefaultGetterName, WildcardParamName}
 import typer.{Namer, Checking}
 import util.{Property, SourceFile, SourcePosition, SrcPos, Chars}
 import config.{Feature, Config}
-import config.Feature.{sourceVersion, migrateTo3, enabled, betterForsEnabled}
+import config.Feature.betterForsEnabled
 import config.SourceVersion.*
 import collection.mutable
 import reporting.*
@@ -21,7 +20,6 @@ import config.Printers
 import parsing.Parsers
 
 import scala.annotation.internal.sharable
-import scala.annotation.threadUnsafe
 
 object desugar {
   import untpd.*

diff --git a/compiler/src/dotty/tools/dotc/ast/DesugarEnums.scala b/compiler/src/dotty/tools/dotc/ast/DesugarEnums.scala
@@ -10,7 +10,6 @@ import util.{Property, SourceFile}
 import typer.ErrorReporting.*
 import transform.SyntheticMembers.ExtendsSingletonMirror
 
-import scala.annotation.internal.sharable
 
 /** Helper methods to desugar enums */
 object DesugarEnums {

diff --git a/compiler/src/dotty/tools/dotc/ast/MainProxies.scala b/compiler/src/dotty/tools/dotc/ast/MainProxies.scala
@@ -2,13 +2,9 @@ package dotty.tools.dotc
 package ast
 
 import core.*
-import Symbols.*, Types.*, Contexts.*, Decorators.*, util.Spans.*, Flags.*, Constants.*
-import StdNames.{nme, tpnme}
+import Symbols.*, Types.*, Contexts.*, Decorators.*, Flags.*, Constants.*
+import StdNames.nme
 import ast.Trees.*
-import Names.Name
-import Comments.Comment
-import NameKinds.DefaultGetterName
-import Annotations.Annotation
 
 object MainProxies {
 

diff --git a/compiler/src/dotty/tools/dotc/ast/TreeInfo.scala b/compiler/src/dotty/tools/dotc/ast/TreeInfo.scala
@@ -5,7 +5,6 @@ package ast
 import core.*
 import Flags.*, Trees.*, Types.*, Contexts.*
 import Names.*, StdNames.*, NameOps.*, Symbols.*
-import Annotations.Annotation
 import NameKinds.ContextBoundParamName
 import typer.ConstFold
 import reporting.trace

diff --git a/compiler/src/dotty/tools/dotc/ast/TreeTypeMap.scala b/compiler/src/dotty/tools/dotc/ast/TreeTypeMap.scala
@@ -4,7 +4,7 @@ package ast
 
 import core.*
 import Types.*, Contexts.*, Flags.*
-import Symbols.*, Annotations.*, Trees.*, Symbols.*, Constants.Constant
+import Annotations.*, Trees.*, Symbols.*, Constants.Constant
 import Decorators.*
 
 

diff --git a/compiler/src/dotty/tools/dotc/ast/tpd.scala b/compiler/src/dotty/tools/dotc/ast/tpd.scala
@@ -5,9 +5,8 @@ package ast
 import dotty.tools.dotc.transform.{ExplicitOuter, Erasure}
 import typer.ProtoTypes
 import core.*
-import Scopes.newScope
 import util.Spans.*, Types.*, Contexts.*, Constants.*, Names.*, Flags.*, NameOps.*
-import Symbols.*, StdNames.*, Annotations.*, Trees.*, Symbols.*
+import StdNames.*, Annotations.*, Trees.*, Symbols.*
 import Decorators.*, DenotTransformers.*
 import collection.{immutable, mutable}
 import util.{Property, SourceFile}

diff --git a/compiler/src/dotty/tools/dotc/cc/CaptureAnnotation.scala b/compiler/src/dotty/tools/dotc/cc/CaptureAnnotation.scala
@@ -4,10 +4,8 @@ package cc
 
 import core.*
 import Types.*, Symbols.*, Contexts.*, Annotations.*
-import ast.Trees.*
 import ast.{tpd, untpd}
 import Decorators.*
-import config.Printers.capt
 import printing.Printer
 import printing.Texts.Text
 
@@ -21,7 +19,6 @@ import printing.Texts.Text
  *  @param cls     the underlying class (either annotation.retains or annotation.retainsByName)
  */
 case class CaptureAnnotation(refs: CaptureSet, boxed: Boolean)(cls: Symbol) extends Annotation:
-  import CaptureAnnotation.*
   import tpd.*
 
   /** A cache for the version of this annotation which differs in its boxed status. */

diff --git a/compiler/src/dotty/tools/dotc/cc/CaptureOps.scala b/compiler/src/dotty/tools/dotc/cc/CaptureOps.scala
@@ -5,13 +5,12 @@ package cc
 import core.*
 import Types.*, Symbols.*, Contexts.*, Annotations.*, Flags.*
 import Names.TermName
-import ast.{tpd, untpd}
-import Decorators.*, NameOps.*
+import ast.tpd
+import Decorators.*
 import config.SourceVersion
 import config.Printers.capt
 import util.Property.Key
 import tpd.*
-import StdNames.nme
 import config.Feature
 import collection.mutable
 import CCState.*

diff --git a/compiler/src/dotty/tools/dotc/cc/CaptureRef.scala b/compiler/src/dotty/tools/dotc/cc/CaptureRef.scala
@@ -3,12 +3,9 @@ package dotc
 package cc
 
 import core.*
-import Types.*, Symbols.*, Contexts.*, Decorators.*
-import util.{SimpleIdentitySet, Property}
-import typer.ErrorReporting.Addenda
+import Types.*, Symbols.*, Contexts.*
+import util.SimpleIdentitySet
 import TypeComparer.subsumesExistentially
-import util.common.alwaysTrue
-import scala.collection.mutable
 import CCState.*
 import Periods.NoRunId
 import compiletime.uninitialized