// 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 or the MIT license // , 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 }