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d1f5f1d156
Introduce `proc_macro_back_compat` lint, and emit for `time-macros-impl` Now that future-incompat-report support has landed in nightly Cargo, we can start to make progress towards removing the various proc-macro back-compat hacks that have accumulated in the compiler. This PR introduces a new lint `proc_macro_back_compat`, which results in a future-incompat-report entry being generated. All proc-macro back-compat warnings will be grouped under this lint. Note that this lint will never actually become a hard error - instead, we will remove the special cases for various macros, which will cause older versions of those crates to emit some other error. I've added code to fire this lint for the `time-macros-impl` case. This is the easiest case out of all of our current back-compat hacks - the crate was renamed to `time-macros`, so seeing a filename with `time-macros-impl` guarantees that an older version of the parent `time` crate is in use. When Cargo's future-incompat-report feature gets stabilized, affected users will start to see future-incompat warnings when they build their crates. |
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| ast | ||
| attr | ||
| expand | ||
| util | ||
| ast_like.rs | ||
| ast.rs | ||
| entry.rs | ||
| lib.rs | ||
| mut_visit.rs | ||
| node_id.rs | ||
| ptr.rs | ||
| token.rs | ||
| tokenstream.rs | ||
| visit.rs | ||