Auto merge of #139766 - jhpratt:rollup-afrfmnk, r=jhpratt

Rollup of 10 pull requests

Successful merges:

 - #137043 (Initial `UnsafePinned` implementation [Part 1: Libs])
 - #138962 (Expect an array when expected and acutal types are both arrays during cast)
 - #139001 (add `naked_functions_rustic_abi` feature gate)
 - #139379 (Use delayed bug for normalization errors in drop elaboration)
 - #139582 (Various coercion cleanups)
 - #139628 (Suggest remove redundant `$()?` around `vis`)
 - #139644 (Micro-optimize `InstSimplify`'s `simplify_primitive_clone`)
 - #139674 (In `rustc_mir_transform`, iterate over index newtypes instead of ints)
 - #139740 (Convert `tests/ui/lint/dead-code/self-assign.rs` to a known-bug test)
 - #139741 (fix smir's run! doc and import)

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

1 files changed, 18 insertions, 0 deletions

diff --git a/compiler/rustc_span/src/source_map.rs b/compiler/rustc_span/src/source_map.rs
index 6fdf8e46fec..0273bb040f4 100644
--- a/compiler/rustc_span/src/source_map.rs
+++ b/compiler/rustc_span/src/source_map.rs
@@ -633,6 +633,24 @@ impl SourceMap {
         sp
     }
 
+    /// Extends the given `Span` to just before the previous occurrence of `c`. Return the same span
+    /// if an error occurred while retrieving the code snippet.
+    pub fn span_extend_to_prev_char_before(
+        &self,
+        sp: Span,
+        c: char,
+        accept_newlines: bool,
+    ) -> Span {
+        if let Ok(prev_source) = self.span_to_prev_source(sp) {
+            let prev_source = prev_source.rsplit(c).next().unwrap_or("");
+            if accept_newlines || !prev_source.contains('\n') {
+                return sp.with_lo(BytePos(sp.lo().0 - prev_source.len() as u32 - 1_u32));
+            }
+        }
+
+        sp
+    }
+
     /// Extends the given `Span` to just after the previous occurrence of `pat` when surrounded by
     /// whitespace. Returns None if the pattern could not be found or if an error occurred while
     /// retrieving the code snippet.