Merge pull request #14521 from ckipp01/reset

improvement(repl): add in feedback when resetting REPL state

Author: TheElectronWill

compiler/src/dotty/tools/repl/ReplDriver.scala

@@ -391,7 +391,16 @@ class ReplDriver(settings: Array[String],
       state
 
     case Reset(arg) =>
-      resetToInitial(tokenize(arg))
+      val tokens = tokenize(arg)
+
+      if tokens.nonEmpty then
+        out.println(s"""|Resetting REPL state with the following settings:
+                        |  ${tokens.mkString("\n  ")}
+                        |""".stripMargin)
+      else
+        out.println("Resetting REPL state.")
+
+      resetToInitial(tokens)
       initialState
 
     case Imports =>

compiler/test-resources/repl/reset-command

@@ -3,6 +3,8 @@ there were 1 deprecation warning(s); re-run with -deprecation for details
 def f(thread: Thread): Unit
 
 scala>:reset -deprecation
+Resetting REPL state with the following settings:
+  -deprecation
 
 scala> def f(thread: Thread) = thread.stop()
 1 warning found
@@ -16,6 +18,7 @@ scala> def resetNoArgsStillWorks = 1
 def resetNoArgsStillWorks: Int
 
 scala>:reset
+Resetting REPL state.
 
 scala> resetNoArgsStillWorks
 -- [E006] Not Found Error: -----------------------------------------------------