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Auto merge of #114452 - weiznich:feature/diagnostic_on_unimplemented, r=compiler-errors

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`#[diagnostic::on_unimplemented]` without filters

This commit adds support for a `#[diagnostic::on_unimplemented]` attribute with the following options:

* `message` to customize the primary error message
* `note` to add a customized note message to an error message
* `label` to customize the label part of the error message

The relevant behavior is specified in [RFC-3366](https://rust-lang.github.io/rfcs/3366-diagnostic-attribute-namespace.html)
This commit is contained in:
bors 2023-09-17 10:00:15 +00:00
commit 327e6cf55c
18 changed files with 360 additions and 39 deletions
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2
compiler/rustc_feature/src/active.rs
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@ -416,7 +416,7 @@ declare_features! (
/// Allows having using `suggestion` in the `#[deprecated]` attribute.
(active, deprecated_suggestion, "1.61.0", Some(94785), None),
/// Allows using the `#[diagnostic]` attribute tool namespace
(active, diagnostic_namespace, "1.73.0", Some(94785), None),
(active, diagnostic_namespace, "1.73.0", Some(111996), None),
/// Controls errors in trait implementations.
(active, do_not_recommend, "1.67.0", Some(51992), None),
/// Tells rustdoc to automatically generate `#[doc(cfg(...))]`.