Align unpickled Scala 2 accessors encoding with Scala 3

Author: nicolasstucki

compiler/src/dotty/tools/dotc/core/unpickleScala2/Scala2Unpickler.scala

@@ -456,6 +456,11 @@ class Scala2Unpickler(bytes: Array[Byte], classRoot: ClassDenotation, moduleClas
       // skip this member
       return NoSymbol
 
+    // Adapt the flags of getters so they become like vals/vars instead
+    if flags.isAllOf(Method | Accessor) && !name.toString().endsWith("_$eq") then
+      flags &~= Method | Accessor
+      if !flags.is(StableRealizable) then flags |= Mutable
+
     name = name.adjustIfModuleClass(flags)
     if (flags.is(Method))
       name =
@@ -620,7 +625,12 @@ class Scala2Unpickler(bytes: Array[Byte], classRoot: ClassDenotation, moduleClas
             setClassInfo(denot, tp, fromScala2 = true, selfInfo)
             NamerOps.addConstructorProxies(denot.classSymbol)
           case denot =>
-            val tp1 = translateTempPoly(tp)
+            val tp0 = translateTempPoly(tp)
+            val tp1 =
+              if !denot.is(Param) && !denot.is(Method) && tp0.isInstanceOf[ExprType] then
+                tp0.asInstanceOf[ExprType].resultType
+              else tp0
+
             denot.info =
               if (tag == ALIASsym) TypeAlias(tp1)
               else if (denot.isType) checkNonCyclic(denot.symbol, tp1, reportErrors = false)

presentation-compiler/test/dotty/tools/pc/tests/completion/CompletionDocSuite.scala

@@ -214,7 +214,7 @@ class CompletionDocSuite extends BaseCompletionSuite:
       """.stripMargin,
       """
         |> Found documentation for scala/package.Vector.
-        |Vector scala.collection.immutable
+        |Vector:  scala.collection.immutable
         |""".stripMargin,
       includeDocs = true
     )

presentation-compiler/test/dotty/tools/pc/tests/completion/CompletionSuite.scala

@@ -25,7 +25,7 @@ class CompletionSuite extends BaseCompletionSuite:
         |  Lis@@
         |}""".stripMargin,
       """
-        |List scala.collection.immutable
+        |List:  scala.collection.immutable
         |List - java.awt
         |List - java.util
         |List - scala.collection.immutable
@@ -647,7 +647,7 @@ class CompletionSuite extends BaseCompletionSuite:
           |}
           |""".stripMargin,
       """|None scala
-         |NoManifest scala.reflect
+         |NoManifest:  scala.reflect
          |""".stripMargin,
       topLines = Some(2)
     )
@@ -660,8 +660,8 @@ class CompletionSuite extends BaseCompletionSuite:
           |}
           |""".stripMargin,
       """|Some(value) scala
-         |Seq scala.collection.immutable
-         |Set scala.collection.immutable
+         |Seq:  scala.collection.immutable
+         |Set:  scala.collection.immutable
          |""".stripMargin,
       topLines = Some(3)
     )

presentation-compiler/test/dotty/tools/pc/tests/tokens/SemanticTokensSuite.scala

@@ -194,7 +194,7 @@ class SemanticTokensSuite extends BaseSemanticTokensSuite:
       s"""|package <<example>>/*namespace*/
           |
           |object <<A>>/*class*/ {
-          |  val <<x>>/*variable,definition,readonly*/ = <<List>>/*class*/(1,2,3)
+          |  val <<x>>/*variable,definition,readonly*/ = <<List>>/*variable,readonly*/(1,2,3)
           |  val <<s>>/*variable,definition,readonly*/ = <<Some>>/*class*/(1)
           |  val <<Some>>/*class*/(<<s1>>/*variable,definition,readonly*/) = <<s>>/*variable,readonly*/
           |  val <<Some>>/*class*/(<<s2>>/*variable,definition,readonly*/) = <<s>>/*variable,readonly*/
@@ -269,7 +269,7 @@ class SemanticTokensSuite extends BaseSemanticTokensSuite:
           |object <<A>>/*class*/ {
           |  val <<a>>/*variable,definition,readonly*/ = 1
           |  var <<b>>/*variable,definition*/ = 2
-          |  val <<c>>/*variable,definition,readonly*/ = <<List>>/*class*/(1,<<a>>/*variable,readonly*/,<<b>>/*variable*/)
+          |  val <<c>>/*variable,definition,readonly*/ = <<List>>/*variable,readonly*/(1,<<a>>/*variable,readonly*/,<<b>>/*variable*/)
           |  <<b>>/*variable*/ = <<a>>/*variable,readonly*/
           |""".stripMargin
     )
@@ -278,10 +278,10 @@ class SemanticTokensSuite extends BaseSemanticTokensSuite:
     check(
       """
         |object <<Main>>/*class*/ {
-        |  val <<a>>/*variable,definition,readonly*/ = <<List>>/*class*/(1,2,3)
-        |  val <<y>>/*variable,definition,readonly*/ = <<Vector>>/*class*/(1,2)
-        |  val <<z>>/*variable,definition,readonly*/ = <<Set>>/*class*/(1,2,3)
-        |  val <<w>>/*variable,definition,readonly*/ = <<Right>>/*class*/(1)
+        |val <<a>>/*variable,definition,readonly*/ = <<List>>/*variable,readonly*/(1,2,3)
+        |val <<y>>/*variable,definition,readonly*/ = <<Vector>>/*variable,readonly*/(1,2)
+        |val <<z>>/*variable,definition,readonly*/ = <<Set>>/*variable,readonly*/(1,2,3)
+        |val <<w>>/*variable,definition,readonly*/ = <<Right>>/*variable,readonly*/(1)
         |}""".stripMargin
     )
 
@@ -326,7 +326,7 @@ class SemanticTokensSuite extends BaseSemanticTokensSuite:
          |
          |object <<B>>/*class*/ {
          |  val <<a>>/*variable,definition,readonly*/ = for {
-         |    <<foo>>/*variable,definition,readonly*/ <- <<List>>/*class*/("a", "b", "c")
+         |    <<foo>>/*variable,definition,readonly*/ <- <<List>>/*variable,readonly*/("a", "b", "c")
          |    <<_>>/*class,abstract*/ = <<println>>/*method*/("print!")
          |  } yield <<foo>>/*variable,readonly*/
          |}

tests/neg/constructor-proxy-shadowing.check

@@ -52,7 +52,7 @@
 17 |val x = Seq(3) // error: shadowing
    |        ^^^
    |        Reference to constructor proxy for class Seq
-   |        shadows outer reference to getter Seq in package scala
+   |        shadows outer reference to value Seq in package scala
    |
    |        The instance needs to be created with an explicit `new`.
    |--------------------------------------------------------------------------------------------------------------------
@@ -66,7 +66,7 @@
    |
    |    new Seq(...)
    |
-   | Or it could mean calling the apply method of getter Seq in package scala as in
+   | Or it could mean calling the apply method of value Seq in package scala as in
    |
    |    Seq.apply(...)
    |