Support some, ok and err wrappers and untyped function inputs

test/fixtures/valid/control.ls

@@ -11,7 +11,7 @@ choose_block: (bit, i32, i32) -> i32: @ (condition: bit, when_true: i32, when_fa
 first_positive: []i32 -> i32?: @ values: []i32 {
     for value in values {
         if value > 0 {
-            return value->|.some
+            return some value
         }
     }
     nil