| Macro import declaration was malformed. |
| |
| Erroneous code examples: |
| |
| ```compile_fail,E0466 |
| #[macro_use(a_macro(another_macro))] // error: invalid import declaration |
| extern crate core as some_crate; |
| |
| #[macro_use(i_want = "some_macros")] // error: invalid import declaration |
| extern crate core as another_crate; |
| ``` |
| |
| This is a syntax error at the level of attribute declarations. The proper |
| syntax for macro imports is the following: |
| |
| ```ignore (cannot-doctest-multicrate-project) |
| // In some_crate: |
| #[macro_export] |
| macro_rules! get_tacos { |
| ... |
| } |
| |
| #[macro_export] |
| macro_rules! get_pimientos { |
| ... |
| } |
| |
| // In your crate: |
| #[macro_use(get_tacos, get_pimientos)] // It imports `get_tacos` and |
| extern crate some_crate; // `get_pimientos` macros from some_crate |
| ``` |
| |
| If you would like to import all exported macros, write `macro_use` with no |
| arguments. |
