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