1 files changed, 6 insertions, 2 deletions
diff --git a/src/dotty/tools/dotc/core/Decorators.scala b/src/dotty/tools/dotc/core/Decorators.scala
index b45c1ee76..af8704258 100644
--- a/src/dotty/tools/dotc/core/Decorators.scala
+++ b/src/dotty/tools/dotc/core/Decorators.scala
@@ -3,8 +3,7 @@ package core
 
 import annotation.tailrec
 import Symbols._
-
-import Contexts._, Names._
+import Contexts._, Names._, Phases._
 
 object Decorators {
 
@@ -43,5 +42,10 @@ object Decorators {
       loop(xs, 0)
     }
   }
+
+  implicit class PhaseListDecorator(val names: List[String]) extends AnyVal {
+    def containsPhase(phase: Phase) =
+      names exists (phase.name.startsWith)
+  }
 }