Auto merge of #106708 - JohnTitor:rollup-xcmg5yv, r=JohnTitor

Rollup of 14 pull requests

Successful merges:

 - #105194 (Add comment to cleanup_kinds)
 - #106521 (remove E0280)
 - #106628 (Remove unneeded ItemId::Primitive variant)
 - #106635 (std sync tests: better type name, clarifying comment)
 - #106642 (Add test for #106062)
 - #106645 ([RFC 2397] Initial implementation)
 - #106653 (Fix help docs for -Zallow-features)
 - #106657 (Remove myself from rust-lang/rust reviewers)
 - #106662 (specialize impl of `ToString` on `bool`)
 - #106669 (create helper function for `rustc_lint_defs::Level` and remove it's duplicated code)
 - #106671 (Change flags with a fixed default value from Option<bool> to bool)
 - #106689 (Fix invalid files array re-creation in rustdoc-gui tester)
 - #106690 (Fix scrolling for item declaration block)
 - #106698 (Add compiler-errors to some trait system notification groups)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 13 insertions, 0 deletions

diff --git a/compiler/rustc_lint_defs/src/lib.rs b/compiler/rustc_lint_defs/src/lib.rs
index aa54b3d8ac2..f4b4c5168bf 100644
--- a/compiler/rustc_lint_defs/src/lib.rs
+++ b/compiler/rustc_lint_defs/src/lib.rs
@@ -253,6 +253,19 @@ impl Level {
         }
     }
 
+    pub fn to_cmd_flag(self) -> &'static str {
+        match self {
+            Level::Warn => "-W",
+            Level::Deny => "-D",
+            Level::Forbid => "-F",
+            Level::Allow => "-A",
+            Level::ForceWarn(_) => "--force-warn",
+            Level::Expect(_) => {
+                unreachable!("the expect level does not have a commandline flag")
+            }
+        }
+    }
+
     pub fn is_error(self) -> bool {
         match self {
             Level::Allow | Level::Expect(_) | Level::Warn | Level::ForceWarn(_) => false,