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//@ proc-macro: derive-b.rs
#[macro_use]
extern crate derive_b;
#[B] //~ ERROR `B` is ambiguous
//~| WARN derive helper attribute is used before it is introduced
//~| WARN this was previously accepted
#[C] //~ ERROR cannot find attribute `C` in this scope
#[B(D)] //~ ERROR `B` is ambiguous
//~| WARN derive helper attribute is used before it is introduced
//~| WARN this was previously accepted
#[B(E = "foo")] //~ ERROR `B` is ambiguous
//~| WARN derive helper attribute is used before it is introduced
//~| WARN this was previously accepted
#[B(arbitrary tokens)] //~ ERROR `B` is ambiguous
//~| WARN derive helper attribute is used before it is introduced
//~| WARN this was previously accepted
#[derive(B)]
struct B;
fn main() {}
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