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Diffstat (limited to 'src/test/ui/union/union-unsafe.rs')
-rw-r--r-- | src/test/ui/union/union-unsafe.rs | 78 |
1 files changed, 0 insertions, 78 deletions
diff --git a/src/test/ui/union/union-unsafe.rs b/src/test/ui/union/union-unsafe.rs deleted file mode 100644 index 5e1837a90..000000000 --- a/src/test/ui/union/union-unsafe.rs +++ /dev/null @@ -1,78 +0,0 @@ -// revisions: mir thir -// [thir]compile-flags: -Z thir-unsafeck - -use std::mem::ManuallyDrop; -use std::cell::RefCell; - -union U1 { - a: u8 -} - -union U2 { - a: ManuallyDrop<String> -} - -union U3<T> { - a: ManuallyDrop<T> -} - -union U4<T: Copy> { - a: T -} - -union URef { - p: &'static mut i32, -} - -union URefCell { // field that does not drop but is not `Copy`, either - a: (ManuallyDrop<RefCell<i32>>, i32), -} - -fn deref_union_field(mut u: URef) { - // Not an assignment but an access to the union field! - *(u.p) = 13; //~ ERROR access to union field is unsafe -} - -fn assign_noncopy_union_field(mut u: URefCell) { - // FIXME(thir-unsafeck) - u.a = (ManuallyDrop::new(RefCell::new(0)), 1); // OK (assignment does not drop) - u.a.0 = ManuallyDrop::new(RefCell::new(0)); // OK (assignment does not drop) - u.a.1 = 1; // OK -} - -fn generic_noncopy<T: Default>() { - let mut u3 = U3 { a: ManuallyDrop::new(T::default()) }; - u3.a = ManuallyDrop::new(T::default()); // OK (assignment does not drop) - *u3.a = T::default(); //~ ERROR access to union field is unsafe -} - -fn generic_copy<T: Copy + Default>() { - let mut u3 = U3 { a: ManuallyDrop::new(T::default()) }; - u3.a = ManuallyDrop::new(T::default()); // OK - *u3.a = T::default(); //~ ERROR access to union field is unsafe - - let mut u4 = U4 { a: T::default() }; - u4.a = T::default(); // OK -} - -fn main() { - let mut u1 = U1 { a: 10 }; // OK - let a = u1.a; //~ ERROR access to union field is unsafe - u1.a = 11; // OK - - let U1 { a } = u1; //~ ERROR access to union field is unsafe - if let U1 { a: 12 } = u1 {} //~ ERROR access to union field is unsafe - // let U1 { .. } = u1; // OK - - let mut u2 = U2 { a: ManuallyDrop::new(String::from("old")) }; // OK - u2.a = ManuallyDrop::new(String::from("new")); // OK (assignment does not drop) - *u2.a = String::from("new"); //~ ERROR access to union field is unsafe - - let mut u3 = U3 { a: ManuallyDrop::new(0) }; // OK - u3.a = ManuallyDrop::new(1); // OK - *u3.a = 1; //~ ERROR access to union field is unsafe - - let mut u3 = U3 { a: ManuallyDrop::new(String::from("old")) }; // OK - u3.a = ManuallyDrop::new(String::from("new")); // OK (assignment does not drop) - *u3.a = String::from("new"); //~ ERROR access to union field is unsafe -} |