#[cfg(feature = "use_core")] extern crate core; #[macro_use] extern crate derivative; #[derive(Derivative)] #[derivative(DoesNotExist1)] struct Foo; #[derive(Derivative)] #[derivative(DoesNotExist2(with_some="argument"))] struct Bar; #[derive(Derivative)] #[derivative(Debug)] struct Baz { #[derivative(DoesNotExist3)] _baz: (), } fn main() {}