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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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11
compiler/rustc_lint_defs/src/builtin.rs
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@ -3405,8 +3405,8 @@ declare_lint_pass! {
UNFULFILLED_LINT_EXPECTATIONS,
UNINHABITED_STATIC,
UNKNOWN_CRATE_TYPES,
UNKNOWN_DIAGNOSTIC_ATTRIBUTES,
UNKNOWN_LINTS,
UNKNOWN_OR_MALFORMED_DIAGNOSTIC_ATTRIBUTES,
UNNAMEABLE_TEST_ITEMS,
UNNAMEABLE_TYPES,
UNREACHABLE_CODE,
@ -4420,7 +4420,8 @@ declare_lint! {
}
declare_lint! {
/// The `unknown_diagnostic_attributes` lint detects unrecognized diagnostic attributes.
/// The `unknown_or_malformed_diagnostic_attributes` lint detects unrecognized or otherwise malformed
/// diagnostic attributes.
///
/// ### Example
///
@ -4432,15 +4433,17 @@ declare_lint! {
///
/// {{produces}}
///
///
/// ### Explanation
///
/// It is usually a mistake to specify a diagnostic attribute that does not exist. Check
/// the spelling, and check the diagnostic attribute listing for the correct name. Also
/// consider if you are using an old version of the compiler, and the attribute
/// is only available in a newer version.
pub UNKNOWN_DIAGNOSTIC_ATTRIBUTES,
pub UNKNOWN_OR_MALFORMED_DIAGNOSTIC_ATTRIBUTES,
Warn,
"unrecognized diagnostic attribute"
"unrecognized or malformed diagnostic attribute",
@feature_gate = sym::diagnostic_namespace;
}
declare_lint! {