diff options
Diffstat (limited to 'src/test/ui/union/union-deref.rs')
-rw-r--r-- | src/test/ui/union/union-deref.rs | 29 |
1 files changed, 0 insertions, 29 deletions
diff --git a/src/test/ui/union/union-deref.rs b/src/test/ui/union/union-deref.rs deleted file mode 100644 index 5aa28d93f..000000000 --- a/src/test/ui/union/union-deref.rs +++ /dev/null @@ -1,29 +0,0 @@ -// revisions: mirunsafeck thirunsafeck -// [thirunsafeck]compile-flags: -Z thir-unsafeck - -//! Test the part of RFC 2514 that is about not applying `DerefMut` coercions -//! of union fields. - -use std::mem::ManuallyDrop; - -union U1<T> { x:(), f: ManuallyDrop<(T,)> } - -union U2<T> { x:(), f: (ManuallyDrop<(T,)>,) } - -fn main() { - let mut u : U1<Vec<i32>> = U1 { x: () }; - unsafe { (*u.f).0 = Vec::new() }; // explicit deref, this compiles - unsafe { u.f.0 = Vec::new() }; //~ERROR not automatically applying `DerefMut` on `ManuallyDrop` union field - unsafe { &mut (*u.f).0 }; // explicit deref, this compiles - unsafe { &mut u.f.0 }; //~ERROR not automatically applying `DerefMut` on `ManuallyDrop` union field - unsafe { (*u.f).0.push(0) }; // explicit deref, this compiles - unsafe { u.f.0.push(0) }; //~ERROR not automatically applying `DerefMut` on `ManuallyDrop` union field - - let mut u : U2<Vec<i32>> = U2 { x: () }; - unsafe { (*u.f.0).0 = Vec::new() }; // explicit deref, this compiles - unsafe { u.f.0.0 = Vec::new() }; //~ERROR not automatically applying `DerefMut` on `ManuallyDrop` union field - unsafe { &mut (*u.f.0).0 }; // explicit deref, this compiles - unsafe { &mut u.f.0.0 }; //~ERROR not automatically applying `DerefMut` on `ManuallyDrop` union field - unsafe { (*u.f.0).0.push(0) }; // explicit deref, this compiles - unsafe { u.f.0.0.push(0) }; //~ERROR not automatically applying `DerefMut` on `ManuallyDrop` union field -} |