| // At time of authorship, #[proc_macro_derive = "2500"] will emit an |
| // error when it occurs on a mod (apart from crate-level), but will |
| // not descend further into the mod for other occurrences of the same |
| // error. |
| // |
| // This file sits on its own because the "weird" occurrences here |
| // signal errors, making it incompatible with the "warnings only" |
| // nature of issue-43106-gating-of-builtin-attrs.rs |
| |
| #[proc_macro_derive()] |
| //~^ ERROR the `#[proc_macro_derive]` attribute may only be used on bare functions |
| mod proc_macro_derive1 { |
| mod inner { #![proc_macro_derive()] } |
| // (no error issued here if there was one on outer module) |
| } |
| |
| mod proc_macro_derive2 { |
| mod inner { #![proc_macro_derive()] } |
| //~^ ERROR the `#[proc_macro_derive]` attribute may only be used on bare functions |
| |
| #[proc_macro_derive()] fn f() { } |
| //~^ ERROR the `#[proc_macro_derive]` attribute is only usable with crates of the `proc-macro` |
| |
| #[proc_macro_derive()] struct S; |
| //~^ ERROR the `#[proc_macro_derive]` attribute may only be used on bare functions |
| |
| #[proc_macro_derive()] type T = S; |
| //~^ ERROR the `#[proc_macro_derive]` attribute may only be used on bare functions |
| |
| #[proc_macro_derive()] impl S { } |
| //~^ ERROR the `#[proc_macro_derive]` attribute may only be used on bare functions |
| } |
| |
| fn main() {} |