tests/ui/const_fn.rs - platform/external/rust/cxx - Git at Google

 #[cxx::bridge]
 mod ffi {
     extern "Rust" {
         const fn f();
     }
 }

 const fn f() {}

 fn main() {}
	#[cxx::bridge]
	mod ffi {
	extern "Rust" {
	const fn f();
	}
	}

	const fn f() {}

	fn main() {}