Merge pull request #8310 from dotty-staging/expt-toString

Provide better toString for Expr and Type

Author: nicolasstucki

compiler/src/dotty/tools/dotc/tastyreflect/TastyTreeExpr.scala

@@ -18,5 +18,5 @@ final class TastyTreeExpr(val tree: Tree, val scopeId: Int) extends scala.intern
     case _ => false
   }
   override def hashCode: Int = tree.hashCode
-  override def toString: String = s"Expr(<tasty tree>)"
+  override def toString: String = "'{ ... }"
 }

compiler/src/dotty/tools/dotc/tastyreflect/TreeType.scala

@@ -12,5 +12,5 @@ final class TreeType(val typeTree: Tree, val scopeId: Int) extends scala.interna
     case _ => false
   }
   override def hashCode: Int = typeTree.hashCode
-  override def toString: String = s"Type(<tasty tree>)"
+  override def toString: String = "'[ ... ]"
 }