Remove more .nn

Author: noti0na1

compiler/src/dotty/tools/backend/jvm/ClassfileWriters.scala

@@ -18,8 +18,6 @@ import BTypes.InternalName
 import scala.util.chaining.*
 import dotty.tools.io.JarArchive
 
-import scala.language.unsafeNulls
-
 /** !!! This file is now copied in `dotty.tools.io.FileWriters` in a more general way that does not rely upon
  * `PostProcessorFrontendAccess`, this should probably be changed to wrap that class instead.
  *
@@ -54,11 +52,11 @@ class ClassfileWriters(frontendAccess: PostProcessorFrontendAccess) {
     def close(): Unit
 
     protected def classRelativePath(className: InternalName, suffix: String = ".class"): String =
-      className.replace('.', '/').nn + suffix
+      className.replace('.', '/') + suffix
   }
 
   object ClassfileWriter {
-    private def getDirectory(dir: String): Path = Paths.get(dir).nn
+    private def getDirectory(dir: String): Path = Paths.get(dir)
 
     def apply(): ClassfileWriter = {
       val jarManifestMainClass: Option[String] = compilerSettings.mainClass.orElse {
@@ -137,7 +135,7 @@ class ClassfileWriters(frontendAccess: PostProcessorFrontendAccess) {
         new JarEntryWriter(jarFile, jarManifestMainClass, jarCompressionLevel)
       }
       else if (file.isVirtual) new VirtualFileWriter(file)
-      else if (file.isDirectory) new DirEntryWriter(file.file.toPath.nn)
+      else if (file.isDirectory) new DirEntryWriter(file.file.toPath)
       else throw new IllegalStateException(s"don't know how to handle an output of $file [${file.getClass}]")
   }
 
@@ -151,7 +149,7 @@ class ClassfileWriters(frontendAccess: PostProcessorFrontendAccess) {
     val jarWriter: JarOutputStream = {
       import scala.util.Properties.*
       val manifest = new Manifest
-      val attrs = manifest.getMainAttributes.nn
+      val attrs = manifest.getMainAttributes
       attrs.put(MANIFEST_VERSION, "1.0")
       attrs.put(ScalaCompilerVersion, versionNumberString)
       mainClass.foreach(c => attrs.put(MAIN_CLASS, c))
@@ -184,7 +182,7 @@ class ClassfileWriters(frontendAccess: PostProcessorFrontendAccess) {
       // important detail here, even on Windows, Zinc expects the separator within the jar
       // to be the system default, (even if in the actual jar file the entry always uses '/').
       // see https://github.com/sbt/zinc/blob/dcddc1f9cfe542d738582c43f4840e17c053ce81/internal/compiler-bridge/src/main/scala/xsbt/JarUtils.scala#L47
-      val pathInJar = 
+      val pathInJar =
         if File.separatorChar == '/' then relativePath
         else relativePath.replace('/', File.separatorChar)
       PlainFile.toPlainFile(Paths.get(s"${file.absolutePath}!$pathInJar"))
@@ -293,5 +291,5 @@ class ClassfileWriters(frontendAccess: PostProcessorFrontendAccess) {
   }
 
   /** Can't output a file due to the state of the file system. */
-  class FileConflictException(msg: String, cause: Throwable = null) extends IOException(msg, cause)
+  class FileConflictException(msg: String, cause: Throwable | Null = null) extends IOException(msg, cause)
 }

compiler/src/dotty/tools/dotc/Driver.scala

@@ -38,7 +38,7 @@ class Driver {
         finish(compiler, run)
       catch
         case ex: FatalError =>
-          report.error(ex.getMessage.nn) // signals that we should fail compilation.
+          report.error(ex.getMessage) // signals that we should fail compilation.
         case ex: Throwable if ctx.usedBestEffortTasty =>
           report.bestEffortError(ex, "Some best-effort tasty files were not able to be read.")
           throw ex
@@ -117,7 +117,7 @@ class Driver {
         .distinct
       val ctx1 = ctx.fresh
       val fullClassPath =
-        (newEntries :+ ctx.settings.classpath.value).mkString(java.io.File.pathSeparator.nn)
+        (newEntries :+ ctx.settings.classpath.value).mkString(java.io.File.pathSeparator)
       ctx1.setSetting(ctx1.settings.classpath, fullClassPath)
     else ctx
 

compiler/src/dotty/tools/dotc/cc/CheckCaptures.scala

@@ -991,7 +991,7 @@ class CheckCaptures extends Recheck, SymTransformer:
             trace.force(i"rechecking $tree with pt = $pt", recheckr, show = true):
               super.recheck(tree, pt)
         catch case ex: NoCommonRoot =>
-          report.error(ex.getMessage.nn)
+          report.error(ex.getMessage)
           tree.tpe
         finally curEnv = saved
       if tree.isTerm then

compiler/src/dotty/tools/dotc/classpath/ClassPathFactory.scala

@@ -67,7 +67,7 @@ class ClassPathFactory {
         for
           file <- files
           a <- ClassPath.expandManifestPath(file.absolutePath)
-          path = java.nio.file.Paths.get(a.toURI()).nn
+          path = java.nio.file.Paths.get(a.toURI())
           if Files.exists(path)
         yield
           newClassPath(AbstractFile.getFile(path))

compiler/src/dotty/tools/dotc/config/CommandLineParser.scala

@@ -118,8 +118,8 @@ object CommandLineParser:
       Nil
     else
       def stripComment(s: String) = s.indexOf('#') match { case -1 => s case i => s.substring(0, i) }
-      val lines = Files.readAllLines(path).nn
-      val params = lines.asScala.map(stripComment).filter(!_.nn.isEmpty).mkString(" ")
+      val lines = Files.readAllLines(path)
+      val params = lines.asScala.map(stripComment).filter(!_.isEmpty).mkString(" ")
       tokenize(params)
 
   class ParseException(msg: String) extends RuntimeException(msg)

compiler/src/dotty/tools/dotc/core/Comments.scala

@@ -2,8 +2,6 @@ package dotty.tools
 package dotc
 package core
 
-import scala.language.unsafeNulls
-
 import ast.{ untpd, tpd }
 import Symbols.*, Contexts.*
 import util.{SourceFile, ReadOnlyMap}

compiler/src/dotty/tools/dotc/core/Decorators.scala

@@ -51,7 +51,7 @@ object Decorators {
         if name.length != 0 then name.getChars(0, name.length, chars, s.length)
         termName(chars, 0, len)
       case name: TypeName => s.concat(name.toTermName)
-      case _ => termName(s.concat(name.toString).nn)
+      case _ => termName(s.concat(name.toString))
 
     def indented(width: Int): String =
       val padding = " " * width
@@ -289,10 +289,10 @@ object Decorators {
           case NonFatal(ex)
           if !ctx.settings.YshowPrintErrors.value =>
             s"... (cannot display due to ${ex.className} ${ex.getMessage}) ..."
-      case _ => String.valueOf(x).nn
+      case _ => String.valueOf(x)
 
     /** Returns the simple class name of `x`. */
-    def className: String = x.getClass.getSimpleName.nn
+    def className: String = x.getClass.getSimpleName
 
   extension [T](x: T)
     def assertingErrorsReported(using Context): T = {

compiler/src/dotty/tools/dotc/core/NameOps.scala

@@ -15,7 +15,7 @@ import nme.*
 object NameOps {
 
   object compactify {
-    lazy val md5: MessageDigest = MessageDigest.getInstance("MD5").nn
+    lazy val md5: MessageDigest = MessageDigest.getInstance("MD5")
 
     inline val CLASSFILE_NAME_CHAR_LIMIT = 240
 
@@ -43,7 +43,7 @@ object NameOps {
         val suffix = s.takeRight(edge)
 
         val cs = s.toArray
-        val bytes = Codec.toUTF8(CharBuffer.wrap(cs).nn)
+        val bytes = Codec.toUTF8(CharBuffer.wrap(cs))
         md5.update(bytes)
         val md5chars = md5.digest().map(b => (b & 0xFF).toHexString).mkString
 

compiler/src/dotty/tools/dotc/core/TypeErrors.scala

@@ -32,7 +32,7 @@ abstract class TypeError(using creationContext: Context) extends Exception(""):
     || ctx.settings.YdebugCyclic.value
 
   override def fillInStackTrace(): Throwable =
-    if computeStackTrace then super.fillInStackTrace().nn
+    if computeStackTrace then super.fillInStackTrace()
     else this
 
   /** Convert to message. This takes an additional Context, so that we

compiler/src/dotty/tools/dotc/core/TypeEval.scala

@@ -94,7 +94,7 @@ object TypeEval:
         val result =
           try op
           catch case e: Throwable =>
-            throw TypeError(em"${e.getMessage.nn}")
+            throw TypeError(em"${e.getMessage}")
         ConstantType(Constant(result))
 
       def fieldsOf: Option[Type] =