Fix scala#6765: Add regression test

Author: nicolasstucki

library/src/scala/quoted/Toolbox.scala

@@ -2,7 +2,7 @@ package scala.quoted
 
 import scala.annotation.implicitNotFound
 
-@implicitNotFound("Could not find implicit quoted.Toolbox.\n\nDefault toolbox can be instantiated with:\n  `implicit val toolbox: scala.quoted.Toolbox = scala.quoted.Toolbox.make(getClass.getClassLoader)`\n\n")
+@implicitNotFound("Could not find implicit quoted.Toolbox.\n\nDefault toolbox can be instantiated with:\n  `delegate for scala.quoted.Toolbox = scala.quoted.Toolbox.make(getClass.getClassLoader)`\n\n")
 trait Toolbox {
   def run[T](expr: QuoteContext => Expr[T]): T
 }

tests/run-macros/i6765-b.check

@@ -0,0 +1,8 @@
+{
+  val x$1: java.lang.String = "One"
+  scala.Nil.::[java.lang.String](x$1)
+}
+{
+  val x$1: java.lang.String = "One"
+  scala.Nil.::[java.lang.String](x$1)
+}

tests/run-macros/i6765-b/Macro_1.scala

@@ -0,0 +1,9 @@
+import scala.quoted._
+import delegate scala.quoted._
+
+inline def foo = ${fooImpl}
+
+def fooImpl given (qctx: QuoteContext) = {
+  val res = List('{"One"}).toExprOfList
+  res.show.toExpr
+}

tests/run-macros/i6765-b/Test_2.scala

@@ -0,0 +1,8 @@
+object Test {
+  def main(args: Array[String]): Unit = {
+    val res = foo
+    println(res)
+
+    println(foo)
+  }
+}

tests/run-macros/i6765.check

@@ -0,0 +1,8 @@
+{
+  val x$1: java.lang.String = "One"
+  scala.Nil.::[java.lang.String](x$1)
+}
+{
+  val x$1: java.lang.String = "One"
+  scala.Nil.::[java.lang.String](x$1)
+}

tests/run-macros/i6765/Macro_1.scala

@@ -0,0 +1,12 @@
+import scala.quoted._
+import delegate scala.quoted._
+
+delegate for Toolbox = Toolbox.make(getClass.getClassLoader)
+
+inline def foo = ${fooImpl}
+
+def fooImpl given (qctx: QuoteContext) = {
+  import qctx.tasty._
+  val res = List('{"One"}).toExprOfList
+  res.show.toExpr
+}

tests/run-macros/i6765/Test_2.scala

@@ -0,0 +1,8 @@
+object Test {
+  def main(args: Array[String]): Unit = {
+    val res = foo
+    println(res)
+
+    println(foo)
+  }
+}