| #[cfg(feature = "use_core")] | |
| extern crate core; | |
| #[macro_use] | |
| extern crate derivative; | |
| trait Foo {} | |
| fn fmt<T>(_: &T, _: &mut std::fmt::Formatter) -> std::fmt::Result { | |
| unimplemented!() | |
| } | |
| #[derive(Debug)] | |
| struct Qux<'a, T: Foo>(&'a T); | |
| #[derive(Derivative)] | |
| #[derivative(Debug)] | |
| struct Bar<'a, T: Foo>(#[derivative(Debug(format_with="fmt"))] Qux<'a, T>); | |
| fn main() { | |
| } |