cleanup index generation

tests/objects/trefobjsyntax.nim

@@ -0,0 +1,27 @@
+discard """
+  output: '''wohoo
+baz'''
+"""
+
+# Test to ensure the popular 'ref T' syntax works everywhere
+
+type
+  Foo = object
+    a, b: int
+    s: string
+
+  FooBar = object of RootObj
+    n, m: string
+  Baz = object of FooBar
+
+proc invoke(a: ref Baz) =
+  echo "baz"
+
+# check object construction:
+let x = (ref Foo)(a: 0, b: 45, s: "wohoo")
+echo x.s
+
+var y: ref FooBar = (ref Baz)(n: "n", m: "m")
+
+invoke((ref Baz)(y))
+