Address review comments

Author: odersky

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

@@ -29,7 +29,6 @@ object Feature:
   val erasedDefinitions = experimental("erasedDefinitions")
   val symbolLiterals = deprecated("symbolLiterals")
   val saferExceptions = experimental("saferExceptions")
-  val clauseInterleaving = experimental("clauseInterleaving")
   val pureFunctions = experimental("pureFunctions")
   val captureChecking = experimental("captureChecking")
   val into = experimental("into")

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

@@ -34,7 +34,7 @@ enum SourceVersion:
   def enablesFewerBraces = isAtLeast(`3.3`)
   def enablesClauseInterleaving = isAtLeast(`3.6`)
   def enablesNewGivens = isAtLeast(`3.6`)
-  def enablesNamedTuples = isAtLeast(`3.6`)
+  def enablesNamedTuples = isAtLeast(`3.7`)
 
 object SourceVersion extends Property.Key[SourceVersion]:
   def defaultSourceVersion = `3.7`

compiler/src/dotty/tools/dotc/parsing/Parsers.scala

@@ -1011,7 +1011,7 @@ object Parsers {
       skipParams()
       lookahead.isColon
       && {
-        !sourceVersion.isAtLeast(`3.6`)
+        !sourceVersion.enablesNewGivens
         || { // in the new given syntax, a `:` at EOL after an identifier represents a single identifier given
              // Example:
              //    given C:
@@ -1870,7 +1870,7 @@ object Parsers {
       infixOps(t, canStartInfixTypeTokens, operand, Location.ElseWhere, ParseKind.Type,
         isOperator = !followingIsVararg()
                      && !isPureArrow
-                     && !(isIdent(nme.as) && sourceVersion.isAtLeast(`3.6`) && inContextBound)
+                     && !(isIdent(nme.as) && sourceVersion.enablesNewGivens && inContextBound)
                      && nextCanFollowOperator(canStartInfixTypeTokens))
 
     /** RefinedType   ::=  WithType {[nl] Refinement} [`^` CaptureSet]
@@ -2263,7 +2263,7 @@ object Parsers {
     def contextBound(pname: TypeName): Tree =
       val t = toplevelTyp(inContextBound = true)
       val ownName =
-        if isIdent(nme.as) && sourceVersion.isAtLeast(`3.6`) then
+        if isIdent(nme.as) && sourceVersion.enablesNewGivens then
           in.nextToken()
           ident()
         else EmptyTermName
@@ -2276,7 +2276,7 @@ object Parsers {
     def contextBounds(pname: TypeName): List[Tree] =
       if in.isColon then
         in.nextToken()
-        if in.token == LBRACE && sourceVersion.isAtLeast(`3.6`)
+        if in.token == LBRACE && sourceVersion.enablesNewGivens
         then inBraces(commaSeparated(() => contextBound(pname)))
         else
           val bound = contextBound(pname)
@@ -3500,7 +3500,7 @@ object Parsers {
           val hkparams = typeParamClauseOpt(ParamOwner.Hk)
           val bounds =
             if paramOwner.acceptsCtxBounds then typeAndCtxBounds(name)
-            else if sourceVersion.isAtLeast(`3.6`) && paramOwner == ParamOwner.Type then typeAndCtxBounds(name)
+            else if sourceVersion.enablesNewGivens && paramOwner == ParamOwner.Type then typeAndCtxBounds(name)
             else typeBounds()
           TypeDef(name, lambdaAbstract(hkparams, bounds)).withMods(mods)
         }
@@ -4069,7 +4069,7 @@ object Parsers {
           case SEMI | NEWLINE | NEWLINES | COMMA | RBRACE | OUTDENT | EOF =>
             makeTypeDef(typeAndCtxBounds(tname))
           case _ if (staged & StageKind.QuotedPattern) != 0
-              || sourceVersion.isAtLeast(`3.6`) && in.isColon =>
+              || sourceVersion.enablesNewGivens && in.isColon =>
             makeTypeDef(typeAndCtxBounds(tname))
           case _ =>
             syntaxErrorOrIncomplete(ExpectedTypeBoundOrEquals(in.token))
@@ -4244,7 +4244,7 @@ object Parsers {
     def givenDef(start: Offset, mods: Modifiers, givenMod: Mod) = atSpan(start, nameStart) {
       var mods1 = addMod(mods, givenMod)
       val nameStart = in.offset
-      var newSyntaxAllowed = sourceVersion.isAtLeast(`3.6`)
+      var newSyntaxAllowed = sourceVersion.enablesNewGivens
       val hasEmbeddedColon = !in.isColon && followingIsGivenDefWithColon()
       val name = if isIdent && hasEmbeddedColon then ident() else EmptyTermName