src/test/ui/feature-gate-macros_in_extern.rs

   1 // Copyright 2018 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 #![feature(decl_macro)]
  12
  13 macro_rules! returns_isize(
  14     ($ident:ident) => (
  15         fn $ident() -> isize;
  16     )
  17 );
  18
  19 macro takes_u32_returns_u32($ident:ident) {
  20     fn $ident (arg: u32) -> u32;
  21 }
  22
  23 macro_rules! emits_nothing(
  24     () => ()
  25 );
  26
  27 #[link(name = "rust_test_helpers", kind = "static")]
  28 extern {
  29     returns_isize!(rust_get_test_int);
  30     //~^ ERROR Macro invocations in `extern {}` blocks are experimental.
  31     takes_u32_returns_u32!(rust_dbg_extern_identity_u32);
  32     //~^ ERROR Macro invocations in `extern {}` blocks are experimental.
  33     emits_nothing!();
  34     //~^ ERROR Macro invocations in `extern {}` blocks are experimental.
  35 }