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// Demonstrates and records a theoretical regressions / breaking changes caused by the
// introduction of async trait bounds.
// Setting the edition to 2018 since we don't regress `demo! { dyn async }` in Rust <2018.
//@ edition:2018
macro_rules! demo {
($ty:ty) => { compile_error!("ty"); };
//~^ ERROR ty
//~| ERROR ty
(impl $c:ident Trait) => {};
(dyn $c:ident Trait) => {};
}
demo! { impl async Trait }
//~^ ERROR `async` trait bounds are unstable
demo! { dyn async Trait }
//~^ ERROR `async` trait bounds are unstable
fn main() {}
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