swap-overlapping

Author: Kivooeo

tests/ui/ptr_ops/ptr-swap-overlapping-regions.rs

@@ -1,17 +1,19 @@
+//! Check that `std::ptr::swap` behaves correctly when the source and destination
+//! pointers refer to the same memory location, avoiding issues like overlapping `memcpy`.
+//! This is a regression test for issues where `ptr::swap` might behave incorrectly
+//! when `src` and `dest` are the same.
+//!
+//! Regression test: <https://github.com/rust-lang/rust/issues/5041>
+
 //@ run-pass
 
 #![allow(dead_code)]
-// Issue #5041 - avoid overlapping memcpy when src and dest of a swap are the same
-
 
 use std::ptr;
 
 pub fn main() {
     let mut test = TestDescAndFn {
-        desc: TestDesc {
-            name: TestName::DynTestName("test".to_string()),
-            should_fail: false
-        },
+        desc: TestDesc { name: TestName::DynTestName("test".to_string()), should_fail: false },
         testfn: TestFn::DynTestFn(22),
     };
     do_swap(&mut test);
@@ -24,7 +26,7 @@ fn do_swap(test: &mut TestDescAndFn) {
 }
 
 pub enum TestName {
-    DynTestName(String)
+    DynTestName(String),
 }
 
 pub enum TestFn {
@@ -34,7 +36,7 @@ pub enum TestFn {
 
 pub struct TestDesc {
     name: TestName,
-    should_fail: bool
+    should_fail: bool,
 }
 
 pub struct TestDescAndFn {