rust/tests/ui/proc-macro/illegal-proc-macro-derive-use.rs
2023-01-11 09:32:08 +00:00

16 lines
355 B
Rust

extern crate proc_macro;
#[proc_macro_derive(Foo)]
//~^ ERROR: only usable with crates of the `proc-macro` crate type
pub fn foo(a: proc_macro::TokenStream) -> proc_macro::TokenStream {
a
}
// Issue #37590
#[proc_macro_derive(Foo)]
//~^ ERROR: the `#[proc_macro_derive]` attribute may only be used on bare functions
pub struct Foo {
}
fn main() {}