Trait std::ops::Drop 1.0.0
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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; }Run
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.
This function cannot be called explicitly. This is compiler error
E0040. However, the std::mem::drop function in the prelude can be
used to call the argument's Drop implementation.
Panics
Given that a panic! will call drop() as it unwinds, any panic! in
a drop() implementation will likely abort.
Implementors
impl<'a, T> Drop for PeekMut<'a, T> where T: Ordimpl<K, V> Drop for BTreeMap<K, V>impl<K, V> Drop for std::collections::btree_map::IntoIter<K, V>impl<T> Drop for LinkedList<T>impl<'a> Drop for std::string::Drain<'a>impl<T> Drop for Vec<T>impl<T> Drop for std::vec::IntoIter<T>impl<'a, T> Drop for std::vec::Drain<'a, T>impl<T> Drop for VecDeque<T>impl<'a, T> Drop for std::collections::vec_deque::Drain<'a, T> where T: 'aimpl<T> Drop for IntermediateBox<T> where T: ?Sizedimpl<T> Drop for Box<T> where T: ?Sizedimpl<T> Drop for Arc<T> where T: ?Sizedimpl<T> Drop for std::sync::Weak<T> where T: ?Sizedimpl<T> Drop for Rc<T> where T: ?Sizedimpl<T> Drop for std::rc::Weak<T> where T: ?Sizedimpl<T> Drop for RawVec<T>impl Drop for CStringimpl<W: Write> Drop for BufWriter<W>impl Drop for Selectimpl<'rx, T: Send> Drop for Handle<'rx, T>impl<T> Drop for Sender<T>impl<T> Drop for SyncSender<T>impl<T> Drop for Receiver<T>impl Drop for Condvarimpl<T: ?Sized> Drop for Mutex<T>impl<'a, T: ?Sized> Drop for MutexGuard<'a, T>impl<T: ?Sized> Drop for RwLock<T>impl<'a, T: ?Sized> Drop for RwLockReadGuard<'a, T>impl<'a, T: ?Sized> Drop for RwLockWriteGuard<'a, T>