bugfix: Fix issues after backporting

- remove named tuples specific parts (we anyway try to port as much as possible to avoid conflicts in the future)
- add isTransparent method which was probably added in some incompatible PR

Author: tgodzik

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

@@ -127,6 +127,16 @@ class TypeUtils:
       case mt: MethodType => mt.isImplicitMethod || mt.resType.takesImplicitParams
       case _ => false
 
+   /** Is this a type deriving only from transparent classes?
+     *  @param traitOnly  if true, all class symbols must be transparent traits
+     */
+    def isTransparent(traitOnly: Boolean = false)(using Context): Boolean = self match
+      case AndType(tp1, tp2) =>
+        tp1.isTransparent(traitOnly) && tp2.isTransparent(traitOnly)
+      case _ =>
+        val cls = self.underlyingClassRef(refinementOK = false).typeSymbol
+        cls.isTransparentClass && (!traitOnly || cls.is(Trait))
+
     /** The constructors of this type that are applicable to `argTypes`, without needing
      *  an implicit conversion. Curried constructors are always excluded.
      *  @param adaptVarargs   if true, allow a constructor with just a varargs argument to

presentation-compiler/src/main/dotty/tools/pc/HoverProvider.scala

@@ -107,7 +107,7 @@ object HoverProvider:
         case (symbol, tpe, _) :: _
             if symbol.name == nme.selectDynamic || symbol.name == nme.applyDynamic =>
           fallbackToDynamics(path, printer, contentType)
-        case symbolTpes @ ((symbol, tpe, None) :: _) =>
+        case symbolTpes @ ((symbol, tpe, _) :: _) =>
           val exprTpw = tpe.widenTermRefExpr.deepDealias
           val hoverString =
             tpw match
@@ -153,21 +153,6 @@ object HoverProvider:
             case _ =>
               ju.Optional.empty().nn
           end match
-        case (_, tpe, Some(namedTupleArg)) :: _ =>
-          val exprTpw = tpe.widenTermRefExpr.deepDealias
-          printer.expressionType(exprTpw) match
-            case Some(tpe) =>
-              ju.Optional.of(
-                new ScalaHover(
-                  expressionType = Some(tpe),
-                  symbolSignature = Some(s"$namedTupleArg: $tpe"),
-                  docstring = None,
-                  forceExpressionType = false,
-                  contextInfo = printer.getUsedRenamesInfo,
-                  contentType = contentType
-                )
-              ).nn
-            case _ => ju.Optional.empty().nn
       end match
     end if
   end hover
@@ -183,7 +168,7 @@ object HoverProvider:
     case SelectDynamicExtractor(sel, n, name, rest) =>
       def findRefinement(tp: Type): Option[HoverSignature] =
         tp match
-          case RefinedType(_, refName, tpe) if (name == refName.toString() || refName.toString() == nme.Fields.toString()) =>
+          case RefinedType(_, refName, tpe) if name == refName.toString() =>
             val resultType =
               rest match
                 case Select(_, asInstanceOf) :: TypeApply(_, List(tpe)) :: _ if asInstanceOf == nme.asInstanceOfPM =>
@@ -196,8 +181,7 @@ object HoverProvider:
               else printer.tpe(resultType)
 
             val valOrDef =
-              if refName.toString() == nme.Fields.toString() then ""
-              else if n == nme.selectDynamic && !tpe.isInstanceOf[ExprType]
+              if n == nme.selectDynamic && !tpe.isInstanceOf[ExprType]
               then "val "
               else "def "
 

presentation-compiler/src/main/dotty/tools/pc/MetalsInteractive.scala

@@ -203,20 +203,6 @@ object MetalsInteractive:
           case _ =>
             Nil
 
-      // Handle select on named tuples
-      case (Apply(Apply(TypeApply(fun, List(t1, t2)), List(ddef)), List(Literal(Constant(i: Int))))) :: _
-        if fun.symbol.exists && fun.symbol.name == nme.apply &&
-            fun.symbol.owner.exists && fun.symbol.owner == getModuleIfDefined("scala.NamedTuple").moduleClass =>
-        def getIndex(t: Tree): Option[Type] =
-          t.tpe.dealias match
-            case AppliedType(_, args) => args.get(i)
-            case _ => None
-        val name = getIndex(t1) match
-          case Some(c: ConstantType) => c.value.stringValue
-          case _ => ""
-        val tpe = getIndex(t2).getOrElse(NoType)
-        List((ddef.symbol, tpe, Some(name)))
-
       case path @ head :: tail =>
         if head.symbol.is(Exported) then
           val sym = head.symbol.sourceSymbol

presentation-compiler/test/dotty/tools/pc/tests/definition/PcDefinitionSuite.scala

@@ -504,12 +504,3 @@ class PcDefinitionSuite extends BasePcDefinitionSuite:
          |val a = MyIntOut(1).un@@even
          |""".stripMargin,
     )
-
-  @Test def `named-tuples` =
-    check(
-      """|import scala.language.experimental.namedTuples
-         |
-         |val <<foo>> = (name = "Bob", age = 42, height = 1.9d)
-         |val foo_name = foo.na@@me
-         |""".stripMargin
-    )

presentation-compiler/test/dotty/tools/pc/tests/hover/HoverTermSuite.scala

@@ -718,32 +718,3 @@ class HoverTermSuite extends BaseHoverSuite:
       """def ???: Nothing""".stripMargin.hover
   )
 
-  @Test def `named-tuples`: Unit =
-    check(
-      """import scala.language.experimental.namedTuples
-        |
-        |val foo = (name = "Bob", age = 42, height = 1.9d)
-        |val foo_name = foo.na@@me
-        |""".stripMargin,
-      "name: String".hover
-    )
-
-  @Test def `named-tuples2`: Unit =
-    check(
-      """|import scala.language.experimental.namedTuples
-         |
-         |import NamedTuple.*
-         |
-         |class NamedTupleSelectable extends Selectable {
-         |  type Fields <: AnyNamedTuple
-         |  def selectDynamic(name: String): Any = ???
-         |}
-         |
-         |val person = new NamedTupleSelectable {
-         |  type Fields = (name: String, city: String)
-         |}
-         |
-         |val person_name = person.na@@me
-         |""".stripMargin,
-      "name: String".hover
-    )