Rollup merge of #147464 - RalfJung:repeat, r=saethlin

matthiaskrgr · web-flow · commit 795bbaa37b8b · 2025-10-08T15:39:27.000+02:00
prefer repeat_n() over repeat().take()
diff --git a/compiler/rustc_const_eval/src/interpret/intrinsics.rs b/compiler/rustc_const_eval/src/interpret/intrinsics.rs
@@ -878,7 +878,7 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
             .compute_size_in_bytes(layout.size, count)
             .ok_or_else(|| err_ub_custom!(fluent::const_eval_size_overflow, name = name))?;
 
-        let bytes = std::iter::repeat(byte).take(len.bytes_usize());
+        let bytes = std::iter::repeat_n(byte, len.bytes_usize());
         self.write_bytes_ptr(dst, bytes)
     }
 

Original file line number	Diff line number	Diff line change
`@@ -878,7 +878,7 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {`
`878`	`878`	`.compute_size_in_bytes(layout.size, count)`
`879`	`879`	`.ok_or_else(\|\| err_ub_custom!(fluent::const_eval_size_overflow, name = name))?;`
`880`	`880`
`881`		`- let bytes = std::iter::repeat(byte).take(len.bytes_usize());`
	`881`	`+ let bytes = std::iter::repeat_n(byte, len.bytes_usize());`
`882`	`882`	`self.write_bytes_ptr(dst, bytes)`
`883`	`883`	`}`
`884`	`884`