| // Copyright 2015 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 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // aux-build:internal_unstable.rs |
| |
| #![feature(allow_internal_unstable)] |
| |
| #[macro_use] |
| extern crate internal_unstable; |
| |
| macro_rules! foo { |
| ($e: expr, $f: expr) => {{ |
| $e; |
| $f; |
| internal_unstable::unstable(); //~ ERROR use of unstable |
| }} |
| } |
| |
| #[allow_internal_unstable] |
| macro_rules! bar { |
| ($e: expr) => {{ |
| foo!($e, |
| internal_unstable::unstable()); |
| internal_unstable::unstable(); |
| }} |
| } |
| |
| fn main() { |
| // ok, the instability is contained. |
| call_unstable_allow!(); |
| construct_unstable_allow!(0); |
| |x: internal_unstable::Foo| { call_method_allow!(x) }; |
| |x: internal_unstable::Bar| { access_field_allow!(x) }; |
| |
| // bad. |
| pass_through_allow!(internal_unstable::unstable()); //~ ERROR use of unstable |
| |
| pass_through_noallow!(internal_unstable::unstable()); //~ ERROR use of unstable |
| |
| |
| |
| println!("{:?}", internal_unstable::unstable()); //~ ERROR use of unstable |
| |
| bar!(internal_unstable::unstable()); //~ ERROR use of unstable |
| } |