SI-8316 SI-8318 SI-8248 reintroduces resetAllAttrs

Unfortunately, due to the aforementioned bugs we have to delay our triumph
over resetAllAttrs.

Therefore, I'm rolling back the internal changes to scalac introduced in
https://github.com/scala/scala/pull/3485. Our public reflection API interface
in Scala 2.11 is still going to contain only resetLocalAttrs, but both
the reifier and the label typechecker are too heavily addicted to resetAllAttrs
to do away with it right now.

2 files changed, 56 insertions, 0 deletions

diff --git a/test/files/run/macro-reify-nested-a2/Impls_Macros_1.scala b/test/files/run/macro-reify-nested-a2/Impls_Macros_1.scala
new file mode 100644
index 0000000000..965b191044
--- /dev/null
+++ b/test/files/run/macro-reify-nested-a2/Impls_Macros_1.scala
@@ -0,0 +1,47 @@
+import scala.reflect.runtime.universe._
+import scala.reflect.runtime.{universe => ru}
+import scala.reflect.macros.whitebox.Context
+import scala.language.experimental.macros
+
+case class Utils[C <: Context]( c:C ) {
+  import c.universe._
+  import c.{Tree=>_}
+  object removeDoubleReify extends c.universe.Transformer {
+    def apply( tree:Tree ) = transform(tree)
+    override def transform(tree: Tree): Tree = {
+      super.transform {
+        tree match {
+          case  Apply(TypeApply(Select(_this, termname), _), reification::Nil )
+                if termname.toString == "factory" => c.unreifyTree(reification)
+          case Apply(Select(_this, termname), reification::Nil )
+               if termname.toString == "factory" => c.unreifyTree(reification)
+          case _ => tree
+        }
+      }
+    }
+  }
+}
+object QueryableMacros{
+  def _helper[C <: Context,S:c.WeakTypeTag]( c:C )( name:String, projection:c.Expr[_] ) = {
+    import c.universe._
+    import internal._
+    val element_type = implicitly[c.WeakTypeTag[S]].tpe
+    val foo = c.Expr[ru.Expr[Queryable[S]]](
+    c.reifyTree( gen.mkRuntimeUniverseRef, EmptyTree, c.typecheck(
+      Utils[c.type](c).removeDoubleReify(
+        Apply(Select(c.prefix.tree, TermName( name )), List( projection.tree ))
+       ).asInstanceOf[Tree]
+      )))
+    c.universe.reify{ Queryable.factory[S]( foo.splice )}
+  }
+  def map[T:c.WeakTypeTag, S:c.WeakTypeTag]
+               (c: Context)
+               (projection: c.Expr[T => S]): c.Expr[Queryable[S]] = _helper[c.type,S]( c )( "_map", projection )
+}
+class Queryable[T]{
+  def _map[S]( projection: T => S ) : Queryable[S] = ???
+  def map[S]( projection: T => S ) : Queryable[S] = macro QueryableMacros.map[T,S]
+}
+object Queryable{
+  def factory[S]( projection:ru.Expr[Queryable[S]] ) : Queryable[S] = null
+}
\ No newline at end of file
diff --git a/test/files/run/macro-reify-nested-a2/Test_2.scala b/test/files/run/macro-reify-nested-a2/Test_2.scala
new file mode 100644
index 0000000000..b99c4c55e4
--- /dev/null
+++ b/test/files/run/macro-reify-nested-a2/Test_2.scala
@@ -0,0 +1,9 @@
+object Test extends App{
+  val q : Queryable[Any] = new Queryable[Any]
+  q.map(e1 => q.map(e2=>e1))
+
+  locally {
+    val q : Queryable[Any] = new Queryable[Any]
+    q.map(e1 => q.map(e2=>e1))
+  }
+}
\ No newline at end of file