third_party/rust_crates/vendor/derivative/tests/issue-37-turbofish.rs

#[cfg(feature = "use_core")]
extern crate core;

#[macro_use]
extern crate derivative;

#[derive(Derivative)]
#[derivative(Debug)]
pub struct A {
    #[derivative(Debug(format_with = "std::fmt::Debug::fmt"))]
    v: u64,
}