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

   1 // aux-build:internal_unstable.rs
   2
   3 #![feature(allow_internal_unstable)]
   4
   5 #[macro_use]
   6 extern crate internal_unstable;
   7
   8 macro_rules! foo {
   9     ($e: expr, $f: expr) => {{
  10         $e;
  11         $f;
  12         internal_unstable::unstable(); //~ ERROR use of unstable
  13     }}
  14 }
  15
  16 #[allow_internal_unstable(function)]
  17 macro_rules! bar {
  18     ($e: expr) => {{
  19         foo!($e,
  20              internal_unstable::unstable());
  21         internal_unstable::unstable();
  22     }}
  23 }
  24
  25 fn main() {
  26     // ok, the instability is contained.
  27     call_unstable_allow!();
  28     construct_unstable_allow!(0);
  29     |x: internal_unstable::Foo| { call_method_allow!(x) };
  30     |x: internal_unstable::Bar| { access_field_allow!(x) };
  31
  32     // bad.
  33     pass_through_allow!(internal_unstable::unstable()); //~ ERROR use of unstable
  34
  35     pass_through_noallow!(internal_unstable::unstable()); //~ ERROR use of unstable
  36
  37
  38
  39     println!("{:?}", internal_unstable::unstable()); //~ ERROR use of unstable
  40
  41     bar!(internal_unstable::unstable()); //~ ERROR use of unstable
  42 }