Add regression tests

Author: nicolasstucki

compiler/src/dotty/tools/dotc/transform/Staging.scala

@@ -83,5 +83,5 @@ class Staging extends MacroTransform {
 
 
 object Staging {
-  val name: String = "staging2"
+  val name: String = "staging"
 }

tests/neg/i7892.scala

@@ -0,0 +1,12 @@
+import scala.quoted._
+
+package x {
+  class CExprResult1[T]
+}
+
+def run(using qctx: QuoteContext): Unit = {
+  val cpsLeft: x.CExprResult1[?] = ???
+  run1(cpsLeft)
+}
+
+def run1[L:Type](cpsLeft: x.CExprResult1[L]): Unit = ???

tests/run-macros/i6772/Macro_1.scala

@@ -0,0 +1,14 @@
+import scala.quoted._
+
+object Macros {
+
+  inline def m() : Any = ${  mImpl() }
+
+  def mImpl()(using QuoteContext): Expr[Any] =
+    List(Expr(1), Expr(2), Expr(3)).toExprOfList
+
+  def (list: List[Expr[T]]).toExprOfList[T](using Type[T], QuoteContext): Expr[List[T]] = '{
+    val buff = List.newBuilder[T]
+    ${ Expr.block(list.map(v => '{ buff +=  $v }), '{ buff.result() }) }
+  }
+}

tests/run-macros/i6772/Test_2.scala

@@ -0,0 +1,8 @@
+import scala.quoted._
+import Macros._
+
+object Test {
+  def main(args: Array[String]): Unit = {
+    println(m())
+  }
+}