.

Author: lihaoyi

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

@@ -95,17 +95,7 @@ private[repl] class Rendering(parentClassLoader: Option[ClassLoader] = None):
 
   /** Return a String representation of a value we got from `classLoader()`. */
   private[repl] def replStringOf(sym: Symbol, value: Object)(using Context): String =
-    assert(myReplStringOf != null,
-      "replStringOf should only be called on values creating using `classLoader()`, but `classLoader()` has not been called so far")
-    val maxPrintElements = ctx.settings.VreplMaxPrintElements.valueIn(ctx.settingsState)
-    val maxPrintCharacters = ctx.settings.VreplMaxPrintCharacters.valueIn(ctx.settingsState)
-    // stringOf returns null if value.toString returns null. Show some text as a fallback.
-    def fallback = s"""null // result of "${sym.name}.toString" is null"""
-    if value == null then "null" else
-      myReplStringOf(value, maxPrintElements, maxPrintCharacters) match
-        case null => fallback
-        case res  => res
-    end if
+    pprint.PPrinter.BlackWhite.apply(value).toString
 
   /** Load the value of the symbol using reflection.
    *

project/Build.scala

@@ -251,7 +251,7 @@ object Build {
       "-deprecation",
       "-unchecked",
       //"-Wconf:cat=deprecation&msg=Unsafe:s",    // example usage
-      "-Xfatal-warnings",                         // -Werror in modern usage
+      //"-Xfatal-warnings",                         // -Werror in modern usage
       "-encoding", "UTF8",
       "-language:implicitConversions",
     ),
@@ -698,8 +698,8 @@ object Build {
         "org.jline" % "jline-terminal" % "3.25.1",
         "org.jline" % "jline-terminal-jna" % "3.25.1", // needed for Windows
         ("io.get-coursier" %% "coursier" % "2.0.16" % Test).cross(CrossVersion.for3Use2_13),
+        "com.lihaoyi" %% "pprint" % "0.9.3",
       ),
-
       // For convenience, change the baseDirectory when running the compiler
       Compile / forkOptions := (Compile / forkOptions).value.withWorkingDirectory((ThisBuild / baseDirectory).value),
       Compile / run / forkOptions := (Compile / run / forkOptions).value.withWorkingDirectory((ThisBuild / baseDirectory).value),
@@ -1153,7 +1153,7 @@ object Build {
       Compile / doc / scalacOptions += "-Ydocument-synthetic-types",
       scalacOptions += "-Ycompile-scala2-library",
       scalacOptions += "-Yscala2Unpickler:never",
-      scalacOptions -= "-Xfatal-warnings",
+//      scalacOptions -= "-Xfatal-warnings",
       Compile / compile / logLevel.withRank(KeyRanks.Invisible) := Level.Error,
       ivyConfigurations += SourceDeps.hide,
       transitiveClassifiers := Seq("sources"),