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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/feature-gates/issue-43106-gating-of-proc_macro_derive.rs | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/test/ui/feature-gates/issue-43106-gating-of-proc_macro_derive.rs b/src/test/ui/feature-gates/issue-43106-gating-of-proc_macro_derive.rs new file mode 100644 index 000000000..a94ffd602 --- /dev/null +++ b/src/test/ui/feature-gates/issue-43106-gating-of-proc_macro_derive.rs @@ -0,0 +1,34 @@ +// 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() {} |