| //@ compile-flags:--test | |
| // comments, both doc comments and regular ones, used to trick rustdoc's doctest parser into | |
| // thinking that everything after it was part of the regular program. combined with the librustc_ast | |
| // parser loop failing to detect the manual main function, it would wrap everything in `fn main`, | |
| // which would cause the doctest to fail as the "extern crate" declaration was no longer valid. | |
| // oddly enough, it would pass in 2018 if a crate was in the extern prelude. see | |
| // https://github.com/rust-lang/rust/issues/56727 | |
| //! ``` | |
| //! // crate: proc-macro-test | |
| //! //! this is a test | |
| //! | |
| //! // used to pull in proc-macro specific items | |
| //! extern crate proc_macro; | |
| //! | |
| //! use proc_macro::TokenStream; | |
| //! | |
| //! # fn main() {} | |
| //! ``` |