Add scalaMode and testScalaMode to TypeOps

2 files changed, 12 insertions, 2 deletions

diff --git a/src/dotty/tools/dotc/core/TypeOps.scala b/src/dotty/tools/dotc/core/TypeOps.scala
index 77c6805f0..aa643256c 100644
--- a/src/dotty/tools/dotc/core/TypeOps.scala
+++ b/src/dotty/tools/dotc/core/TypeOps.scala
@@ -5,6 +5,7 @@ package core
 import Contexts._, Types._, Symbols._, Names._, Flags._, Scopes._
 import SymDenotations._, Denotations.Denotation
 import config.Printers._
+import util.Positions._
 import Decorators._
 import StdNames._
 import util.SimpleMap
@@ -572,6 +573,15 @@ trait TypeOps { this: Context => // TODO: Make standalone object.
   /** Is auto-tupling enabled? */
   def canAutoTuple =
     !featureEnabled(defn.LanguageModuleClass, nme.noAutoTupling)
+
+  def scala2Mode =
+    featureEnabled(defn.LanguageModuleClass, nme.Scala2)
+
+  def testScala2Mode(msg: String, pos: Position) = {
+    if (scala2Mode) migrationWarning(msg, pos)
+    scala2Mode
+  }
+
 }
 
 object TypeOps {
diff --git a/src/dotty/tools/dotc/parsing/Parsers.scala b/src/dotty/tools/dotc/parsing/Parsers.scala
index 8d230d321..e5202b515 100644
--- a/src/dotty/tools/dotc/parsing/Parsers.scala
+++ b/src/dotty/tools/dotc/parsing/Parsers.scala
@@ -259,7 +259,7 @@ object Parsers {
     }
 
     /** Cannot use ctx.featureEnabled because accessing the context would force too much */
-    private def scala2mode(msg: => String, pos: Position = Position(in.offset)) = {
+    private def testScala2Mode(msg: String, pos: Position = Position(in.offset)) = {
       val s2 = ctx.settings.language.value.contains(nme.Scala2.toString)
       if (s2) ctx.migrationWarning(msg, source atPos pos)
       s2
@@ -1731,7 +1731,7 @@ object Parsers {
      */
     def defDefOrDcl(mods: Modifiers): Tree = atPos(tokenRange) {
       def scala2ProcedureSyntax =
-        scala2mode("Procedure syntax no longer supported; `=' should be inserted here")
+        testScala2Mode("Procedure syntax no longer supported; `=' should be inserted here")
       if (in.token == THIS) {
         in.nextToken()
         val vparamss = paramClauses(nme.CONSTRUCTOR)