tests/ui/impl-trait/name-mentioning-macro.rs - rust - Git at Google

 trait Foo<T> {}

 macro_rules! bar {
     () => { () }
 }

 fn foo(x: impl Foo<bar!()>) {
     let () = x;
     //~^ ERROR mismatched types
 }

 fn main() {}
	trait Foo<T> {}

	macro_rules! bar {
	() => { () }
	}

	fn foo(x: impl Foo<bar!()>) {
	let () = x;
	//~^ ERROR mismatched types
	}

	fn main() {}