test: _root_

cc @Kha

tests/lean/run/root.lean

@@ -0,0 +1,17 @@
+def x := 10
+
+
+namespace Foo
+
+def x := true
+
+#check x
+#check _root_.x
+
+theorem ex1 : x = true := rfl
+theorem ex2 : _root_.x = 10 := rfl
+
+end Foo
+
+theorem ex3 : x = 10 := rfl
+theorem ex4 : _root_.x = 10 := rfl