port scala-stdlib for Scala.js

.github/workflows/ci.yaml

@@ -103,7 +103,7 @@ jobs:
 
       - name: Scala.js Test
         run: |
-          ./project/scripts/sbt ";sjsSandbox/run ;sjsSandbox/test ;sjsJUnitTests/test ;set sjsJUnitTests/scalaJSLinkerConfig ~= switchToESModules ;sjsJUnitTests/test ;sjsCompilerTests/test"
+          ./project/scripts/sbt ";sjsSandbox/run ;sjsSandbox/test ;sjsJUnitTests/test ;set sjsJUnitTests/scalaJSLinkerConfig ~= switchToESModules ;sjsJUnitTests/test"
 
   test_windows_fast:
     runs-on: [self-hosted, Windows]
@@ -149,7 +149,7 @@ jobs:
         shell: cmd
 
       - name: Scala.js Test
-        run: sbt ";sjsJUnitTests/test ;set sjsJUnitTests/scalaJSLinkerConfig ~= switchToESModules ;sjsJUnitTests/test ;sjsCompilerTests/test"
+        run: sbt ";sjsJUnitTests/test ;set sjsJUnitTests/scalaJSLinkerConfig ~= switchToESModules ;sjsJUnitTests/test"
         shell: cmd
 
   test_windows_full:

.github/workflows/stdlib.yaml

@@ -392,6 +392,24 @@ jobs:
       - name: Report MiMa issues in `tasty-core-bootstrapped`
         run: ./project/scripts/sbt tasty-core-bootstrapped-new/mimaReportBinaryIssues
 
+  mima-scala-library-sjs:
+    runs-on: ubuntu-latest
+    needs: scala-library-sjs
+    steps:
+      - name: Git Checkout
+        uses: actions/checkout@v5
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v5
+        with:
+          distribution: 'temurin'
+          java-version: 17
+          cache: 'sbt'
+
+      - uses: sbt/setup-sbt@v1
+      - name: Report MiMa issues in `scala-library-sjs`
+        run: ./project/scripts/sbt scala-library-sjs/mimaReportBinaryIssues
+
   #################################################################################################
   ########################################### TEST JOBS ###########################################
   #################################################################################################
@@ -499,3 +517,20 @@ jobs:
       - uses: sbt/setup-sbt@v1
       - name: Test `tasty-core-bootstrapped`
         run: ./project/scripts/sbt tasty-core-bootstrapped-new/test
+
+  test-scala-js:
+    runs-on: ubuntu-latest
+    needs: [scala3-compiler-bootstrapped, tasty-core-bootstrapped, scala3-staging, scala3-tasty-inspector, scala-library-sjs]
+    steps:
+      - name: Git Checkout
+        uses: actions/checkout@v5
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v5
+        with:
+          distribution: 'temurin'
+          java-version: 17
+          cache: 'sbt'
+      - uses: sbt/setup-sbt@v1
+      - name: Test `tasty-core-bootstrapped`
+        run: ./project/scripts/sbt sjsCompilerTests/test

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

@@ -32,7 +32,9 @@ object SourceLanguage:
       SourceLanguage.Java
     // Scala 2 methods don't have Inline set, except for the ones injected with `patchStdlibClass`
     // which are really Scala 3 methods.
-    else if denot.isClass && denot.is(Scala2x) || (denot.maybeOwner.lastKnownDenotation.is(Scala2x) && !denot.is(Inline)) then
+    else if denot.isClass && denot.is(Scala2x)
+          || (denot.maybeOwner.lastKnownDenotation.is(Scala2x) && !denot.is(Inline))
+          || denot.is(Param) && denot.maybeOwner.is(Method)  && denot.maybeOwner.maybeOwner.lastKnownDenotation.is(Scala2x) then
       SourceLanguage.Scala2
     else
       SourceLanguage.Scala3

compiler/test/dotty/Properties.scala

@@ -57,9 +57,6 @@ object Properties {
   /** dotty-interfaces jar */
   def dottyInterfaces: String = sys.props("dotty.tests.classes.dottyInterfaces")
 
-  /** dotty-library-js jar */
-  def dottyLibraryJS: String = sys.props("dotty.tests.classes.dottyLibraryJS")
-
   /** dotty-compiler jar */
   def dottyCompiler: String = sys.props("dotty.tests.classes.dottyCompiler")
 

compiler/test/dotty/tools/vulpix/TestConfiguration.scala

@@ -48,7 +48,6 @@ object TestConfiguration {
     Properties.scalaJSJavalib,
     Properties.scalaJSScalalib,
     Properties.scalaJSLibrary,
-    Properties.dottyLibraryJS
   ))
 
   def mkClasspath(classpaths: List[String]): String =

library-js/src/scala/App.scala

@@ -12,6 +12,8 @@
 
 package scala
 
+import scala.language.`2.13`
+
 import java.lang.System.{currentTimeMillis => currentTime}
 import scala.collection.mutable.ListBuffer
 

library-js/src/scala/Array.scala

@@ -12,6 +12,8 @@
 
 package scala
 
+import scala.language.`2.13`
+
 import language.experimental.captureChecking
 
 //import scala.collection.generic._

library-js/src/scala/Console.scala

@@ -12,6 +12,8 @@
 
 package scala
 
+import scala.language.`2.13`
+
 import java.io.{ BufferedReader, InputStream, InputStreamReader, OutputStream, PrintStream, Reader }
 import scala.io.AnsiColor
 import scala.util.DynamicVariable

library-js/src/scala/Enumeration.scala

@@ -12,6 +12,8 @@
 
 package scala
 
+import scala.language.`2.13`
+
 import scala.collection.{SpecificIterableFactory, StrictOptimizedIterableOps, View, immutable, mutable}
 import java.lang.reflect.{Field => JField, Method => JMethod}
 

library-js/src/scala/Symbol.scala

@@ -12,6 +12,8 @@
 
 package scala
 
+import scala.language.`2.13`
+
 import scala.scalajs.js
 
 /** This class provides a simple way to get unique objects for equal strings.
@@ -37,15 +39,14 @@ final class Symbol private (val name: String) extends Serializable {
   override def equals(other: Any) = this eq other.asInstanceOf[AnyRef]
 }
 
-// Modified to use Scala.js specific cache
-object Symbol extends JSUniquenessCache[Symbol] {
+object Symbol extends UniquenessCache[String, Symbol] {
   override def apply(name: String): Symbol = super.apply(name)
   protected def valueFromKey(name: String): Symbol = new Symbol(name)
   protected def keyFromValue(sym: Symbol): Option[String] = Some(sym.name)
 }
 
-private[scala] abstract class JSUniquenessCache[V]
-{
+// Modified to use Scala.js specific cache
+private[scala] abstract class UniquenessCache[K, V >: Null] {
   private val cache = js.Dictionary.empty[V]
 
   protected def valueFromKey(k: String): V
@@ -55,59 +56,4 @@ private[scala] abstract class JSUniquenessCache[V]
     cache.getOrElseUpdate(name, valueFromKey(name))
 
   def unapply(other: V): Option[String] = keyFromValue(other)
-}
-
-/** This is private so it won't appear in the library API, but
-  * abstracted to offer some hope of reusability.  */
-/* DELETED for Scala.js
-private[scala] abstract class UniquenessCache[K >: js.String, V >: Null]
-{
-
-  import java.lang.ref.WeakReference
-  import java.util.WeakHashMap
-  import java.util.concurrent.locks.ReentrantReadWriteLock
-
-  private[this] val rwl = new ReentrantReadWriteLock()
-  private[this] val rlock = rwl.readLock
-  private[this] val wlock = rwl.writeLock
-  private[this] val map = new WeakHashMap[K, WeakReference[V]]
-
-  protected def valueFromKey(k: K): V
-  protected def keyFromValue(v: V): Option[K]
-
-  def apply(name: K): V = {
-    def cached(): V = {
-      rlock.lock
-      try {
-        val reference = map get name
-        if (reference == null) null
-        else reference.get  // will be null if we were gc-ed
-      }
-      finally rlock.unlock
-    }
-    def updateCache(): V = {
-      wlock.lock
-      try {
-        val res = cached()
-        if (res != null) res
-        else {
-          // If we don't remove the old String key from the map, we can
-          // wind up with one String as the key and a different String as
-          // the name field in the Symbol, which can lead to surprising GC
-          // behavior and duplicate Symbols. See scala/bug#6706.
-          map remove name
-          val sym = valueFromKey(name)
-          map.put(name, new WeakReference(sym))
-          sym
-        }
-      }
-      finally wlock.unlock
-    }
-
-    val res = cached()
-    if (res == null) updateCache()
-    else res
-  }
-  def unapply(other: V): Option[K] = keyFromValue(other)
-}
-*/
+}

library-js/src/scala/collection/immutable/NumericRange.scala

@@ -12,6 +12,8 @@
 
 package scala.collection.immutable
 
+import scala.language.`2.13`
+
 import scala.collection.Stepper.EfficientSplit
 import scala.collection.{AbstractIterator, AnyStepper, IterableFactoryDefaults, Iterator, Stepper, StepperShape}
 

library-js/src/scala/collection/immutable/Range.scala

@@ -13,6 +13,8 @@
 package scala
 package collection.immutable
 
+import scala.language.`2.13`
+
 import scala.collection.Stepper.EfficientSplit
 import scala.collection.convert.impl.RangeStepper
 import scala.collection.{AbstractIterator, AnyStepper, IterableFactoryDefaults, Iterator, Stepper, StepperShape}

library-js/src/scala/collection/mutable/ArrayBuilder.scala

@@ -13,6 +13,8 @@
 package scala.collection
 package mutable
 
+import scala.language.`2.13`
+
 import scala.reflect.ClassTag
 import scala.runtime.BoxedUnit
 

library-js/src/scala/collection/mutable/Buffer.scala

@@ -13,6 +13,8 @@
 package scala.collection
 package mutable
 
+import scala.language.`2.13`
+
 import scala.scalajs.js
 
 /** A `Buffer` is a growable and shrinkable `Seq`. */

library-js/src/scala/concurrent/ExecutionContext.scala

@@ -12,6 +12,7 @@
 
 package scala.concurrent
 
+import scala.language.`2.13`
 
 import java.util.concurrent.{ ExecutorService, Executor }
 import scala.annotation.implicitNotFound

library-js/src/scala/math/ScalaNumber.scala

@@ -10,6 +10,8 @@
 
 package scala.math
 
+import scala.language.`2.13`
+
 /** A marker class for Number types introduced by Scala
  *  @author  Martin Odersky, Paul Phillips
  *  @version 2.8

library-js/src/scala/package.scala

@@ -12,6 +12,8 @@
 
 import scala.annotation.migration
 
+import scala.language.`2.13`
+
 /**
  * Core Scala types. They are always available without an explicit import.
  * @contentDiagram hideNodes "scala.Serializable"

library-js/src/scala/reflect/ClassTag.scala

@@ -13,6 +13,8 @@
 package scala
 package reflect
 
+import scala.language.`2.13`
+
 import scala.annotation.unchecked.uncheckedStable
 
 import java.lang.{ Class => jClass }

library-js/src/scala/reflect/Manifest.scala

@@ -13,6 +13,8 @@
 package scala
 package reflect
 
+import scala.language.`2.13`
+
 import scala.collection.mutable.{ArrayBuilder, ArraySeq}
 
 /** A `Manifest[T]` is an opaque descriptor for type T.  Its supported use

library-js/src/scala/runtime/BoxesRunTime.scala

@@ -1,5 +1,7 @@
 package scala.runtime
 
+import scala.language.`2.13`
+
 import scala.math.ScalaNumber
 
 /* The declaration of the class is only to make the JVM back-end happy when

library-js/src/scala/runtime/ScalaRunTime.scala

@@ -13,6 +13,8 @@
 package scala
 package runtime
 
+import scala.language.`2.13`
+
 import scala.collection.{AbstractIterator, AnyConstr, SortedOps, StrictOptimizedIterableOps, StringOps, StringView, View}
 import scala.collection.immutable.{ArraySeq, NumericRange}
 import scala.collection.mutable.StringBuilder

library-js/src/scala/util/DynamicVariable.scala

@@ -13,6 +13,8 @@
 package scala
 package util
 
+import scala.language.`2.13`
+
 import java.lang.InheritableThreadLocal
 
 /** `DynamicVariables` provide a binding mechanism where the current

library-js/src/scala/util/control/NoStackTrace.scala

@@ -13,6 +13,8 @@
 package scala
 package util.control
 
+import scala.language.`2.13`
+
 /** A trait for exceptions which, for efficiency reasons, do not
  *  fill in the stack trace.  Stack trace suppression can be disabled
  *  on a global basis via a system property wrapper in