Trait std::ops::Drop
[−]
[src]
pub trait Drop { fn drop(&mut self); }
The Drop
trait is used to run some code when a value goes out of scope.
This is sometimes called a 'destructor'.
Examples
A trivial implementation of Drop
. The drop
method is called when _x
goes out of scope, and therefore main
prints Dropping!
.
struct HasDrop; impl Drop for HasDrop { fn drop(&mut self) { println!("Dropping!"); } } fn main() { let _x = HasDrop; }
Required Methods
fn drop(&mut self)
A method called when the value goes out of scope.
When this method has been called, self
has not yet been deallocated.
If it were, self
would be a dangling reference.
After this function is over, the memory of self
will be deallocated.
Panics
Given that a panic!
will call drop()
as it unwinds, any panic!
in
a drop()
implementation will likely abort.
Implementors
impl<'b> Drop for BorrowRef<'b>
impl<'b> Drop for BorrowRefMut<'b>
impl<T> Drop for IntermediateBox<T> where T: ?Sized
impl<T> Drop for Arc<T> where T: ?Sized
impl<T> Drop for Weak<T> where T: ?Sized
impl<T> Drop for Rc<T> where T: ?Sized
impl<T> Drop for Weak<T> where T: ?Sized
impl<T> Drop for RawVec<T>
impl<'a, T> Drop for Hole<'a, T>
impl<K, V> Drop for BTreeMap<K, V>
impl<K, V> Drop for IntoIter<K, V>
impl<T> Drop for LinkedList<T>
impl<'a> Drop for Drain<'a>
impl<T> Drop for Vec<T>
impl<T> Drop for IntoIter<T>
impl<'a, T> Drop for Drain<'a, T>
impl<T> Drop for VecDeque<T>
impl<'a, T> Drop for Drain<'a, T> where T: 'a
impl<'a, K: 'a, V: 'a> Drop for Drain<'a, K, V>
impl<K, V> Drop for RawTable<K, V>
impl Drop for File
impl<T> Drop for Queue<T>
impl<'a, T: ?Sized> Drop for MutexGuard<'a, T>
impl<'a, T: ?Sized> Drop for RwLockReadGuard<'a, T>
impl<'a, T: ?Sized> Drop for RwLockWriteGuard<'a, T>