25914399ab
refactor `AttributeGate` and `rustc_attr!` to emit notes during feature checking
First commit changes the following:
- `AttributeGate ` from an enum with (four) tuple fields to (five) named fields
- adds a `notes` fields that is emitted as notes in the `PostExpansionVisitor` pass
- removes the `this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date` note if the feature gate is `rustc_attrs`.
- various phrasing changes and touchups
- and finally, the reason why I went down this path to begin with: tell people they can use the diagnostic namespace when they hit the rustc_on_unimplemented feature gate 🙈
Second commit removes unused machinery for deprecated attributes
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| .. | ||
| config | ||
| code_stats.rs | ||
| config.rs | ||
| cstore.rs | ||
| errors.rs | ||
| filesearch.rs | ||
| lib.rs | ||
| options.rs | ||
| output.rs | ||
| parse.rs | ||
| search_paths.rs | ||
| session.rs | ||
| utils.rs | ||