Use proc, fn and const dont work

src_v2/parser/test.nim

@@ -0,0 +1,11 @@
+import sugar
+import results
+
+func adder_generator(a: int): (int -> int) =
+  return func(b: int): int =
+    a + b
+
+
+const add_1 = adder_generator(1)
+
+echo add_1(1)