src/test/ui/internal/internal-unstable.rs

   1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // aux-build:internal_unstable.rs
  12
  13 #![feature(allow_internal_unstable)]
  14
  15 #[macro_use]
  16 extern crate internal_unstable;
  17
  18 macro_rules! foo {
  19     ($e: expr, $f: expr) => {{
  20         $e;
  21         $f;
  22         internal_unstable::unstable(); //~ ERROR use of unstable
  23     }}
  24 }
  25
  26 #[allow_internal_unstable]
  27 macro_rules! bar {
  28     ($e: expr) => {{
  29         foo!($e,
  30              internal_unstable::unstable());
  31         internal_unstable::unstable();
  32     }}
  33 }
  34
  35 fn main() {
  36     // ok, the instability is contained.
  37     call_unstable_allow!();
  38     construct_unstable_allow!(0);
  39     |x: internal_unstable::Foo| { call_method_allow!(x) };
  40     |x: internal_unstable::Bar| { access_field_allow!(x) };
  41
  42     // bad.
  43     pass_through_allow!(internal_unstable::unstable()); //~ ERROR use of unstable
  44
  45     pass_through_noallow!(internal_unstable::unstable()); //~ ERROR use of unstable
  46
  47
  48
  49     println!("{:?}", internal_unstable::unstable()); //~ ERROR use of unstable
  50
  51     bar!(internal_unstable::unstable()); //~ ERROR use of unstable
  52 }