std::ops::Drop

Trait std::ops::Drop

#[lang = "drop"]
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

Implementors

• impl<'a, T> Drop for PeekMut<'a, T> where
    T: Ord, 
• impl<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: 'a, 
• impl<T> Drop for IntermediateBox<T> where
    T: ?Sized, 
• impl<T> Drop for Box<T> where
    T: ?Sized, 
• impl<T> Drop for Arc<T> where
    T: ?Sized, 
• impl<T> Drop for std::sync::Weak<T> where
    T: ?Sized, 
• impl<T> Drop for Rc<T> where
    T: ?Sized, 
• impl<T> Drop for std::rc::Weak<T> where
    T: ?Sized, 
• impl<T> Drop for RawVec<T>
• impl<'a, K, V> Drop for EntryPlace<'a, K, V>
• impl Drop for CString
• impl<W: Write> Drop for BufWriter<W>
• impl Drop for Select
• impl<'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 Condvar
• impl<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>