// Copyright 2012 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. mod ctr { pub enum ctr { priv mkCtr(int) } pub fn new(i: int) -> ctr { mkCtr(i) } pub fn inc(c: ctr) -> ctr { mkCtr(*c + 1) } } fn main() { let c = ctr::new(42); let c2 = ctr::inc(c); assert *c2 == 5; //~ ERROR can only dereference enums with a single, public variant }