diff options
Diffstat (limited to 'library/core/tests/manually_drop.rs')
-rw-r--r-- | library/core/tests/manually_drop.rs | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/library/core/tests/manually_drop.rs b/library/core/tests/manually_drop.rs new file mode 100644 index 000000000..9eac27973 --- /dev/null +++ b/library/core/tests/manually_drop.rs @@ -0,0 +1,27 @@ +use core::mem::ManuallyDrop; + +#[test] +fn smoke() { + #[derive(Clone)] + struct TypeWithDrop; + impl Drop for TypeWithDrop { + fn drop(&mut self) { + unreachable!("Should not get dropped"); + } + } + + let x = ManuallyDrop::new(TypeWithDrop); + drop(x); + + // also test unsizing + let x: Box<ManuallyDrop<[TypeWithDrop]>> = + Box::new(ManuallyDrop::new([TypeWithDrop, TypeWithDrop])); + drop(x); + + // test clone and clone_from implementations + let mut x = ManuallyDrop::new(TypeWithDrop); + let y = x.clone(); + x.clone_from(&y); + drop(x); + drop(y); +} |