| error[E0658]: `macro` is experimental | |
| --> $DIR/feature-gate-decl_macro.rs:3:1 | |
| | | |
| LL | macro m() {} | |
| | ^^^^^^^^^^^^ | |
| | | |
| = note: for more information, see https://github.com/rust-lang/rust/issues/39412 | |
| = help: add `#![feature(decl_macro)]` to the crate attributes to enable | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0658`. |