26     T: 'a,
34     pub(super) iter: slice::Iter<'a, T>,
35     pub(super) vec: NonNull<Vec<T, A>>,
39 impl<T: fmt::Debug, A: Allocator> fmt::Debug for Drain<'_, T, A> {
45 impl<'a, T, A: Allocator> Drain<'a, T, A> {
59     pub fn as_slice(&self) -> &[T] {  in as_slice()  argument
73 impl<'a, T, A: Allocator> AsRef<[T]> for Drain<'a, T, A> {
74     fn as_ref(&self) -> &[T] {  in as_ref()  argument
80 unsafe impl<T: Sync, A: Sync + Allocator> Sync for Drain<'_, T, A> {}
82 unsafe impl<T: Send, A: Send + Allocator> Send for Drain<'_, T, A> {}
85 impl<T, A: Allocator> Iterator for Drain<'_, T, A> {
86     type Item = T;
89     fn next(&mut self) -> Option<T> {  in next()  argument
99 impl<T, A: Allocator> DoubleEndedIterator for Drain<'_, T, A> {
101     fn next_back(&mut self) -> Option<T> {  in next_back()  argument
107 impl<T, A: Allocator> Drop for Drain<'_, T, A> {
110         struct DropGuard<'r, 'a, T, A: Allocator>(&'r mut Drain<'a, T, A>);  in drop()
112         impl<'r, 'a, T, A: Allocator> Drop for DropGuard<'r, 'a, T, A> {  in drop()
136         if mem::size_of::<T>() == 0 {  in drop()
176 impl<T, A: Allocator> ExactSizeIterator for Drain<'_, T, A> {
183 unsafe impl<T, A: Allocator> TrustedLen for Drain<'_, T, A> {}
186 impl<T, A: Allocator> FusedIterator for Drain<'_, T, A> {}