Rollup merge of rust-lang#139105 - ShE3py:BackendRepr-is_signed, r=compiler-errors

matthiaskrgr · web-flow · commit 713c58e37d0a · 2025-03-29T21:08:14.000+01:00
`BackendRepr::is_signed`: comment why this may panics Was wondering why this method could panics while the others couldn't, so quote PR rust-lang#70189.
diff --git a/compiler/rustc_abi/src/lib.rs b/compiler/rustc_abi/src/lib.rs
@@ -1462,7 +1462,8 @@ impl BackendRepr {
         !self.is_unsized()
     }
 
-    /// Returns `true` if this is a single signed integer scalar
+    /// Returns `true` if this is a single signed integer scalar.
+    /// Sanity check: panics if this is not a scalar type (see PR #70189).
     #[inline]
     pub fn is_signed(&self) -> bool {
         match self {

Original file line number	Diff line number	Diff line change
`@@ -1462,7 +1462,8 @@ impl BackendRepr {`
`1462`	`1462`	`!self.is_unsized()`
`1463`	`1463`	`}`
`1464`	`1464`
`1465`		- /// Returns `true` if this is a single signed integer scalar
	`1465`	+ /// Returns `true` if this is a single signed integer scalar.
	`1466`	`+ /// Sanity check: panics if this is not a scalar type (see PR #70189).`
`1466`	`1467`	`#[inline]`
`1467`	`1468`	`pub fn is_signed(&self) -> bool {`
`1468`	`1469`	`match self {`