widestring/ustring/
iter.rs

1#[allow(unused_imports)]
2use core::iter::{DoubleEndedIterator, ExactSizeIterator, FusedIterator};
3
4/// A draining iterator for string data with unknown encoding.
5#[derive(Debug)]
6pub struct Drain<'a, T> {
7    pub(crate) inner: alloc::vec::Drain<'a, T>,
8}
9
10impl<T> AsRef<[T]> for Drain<'_, T> {
11    #[inline]
12    fn as_ref(&self) -> &[T] {
13        self.inner.as_ref()
14    }
15}
16
17impl<T> Iterator for Drain<'_, T> {
18    type Item = T;
19
20    #[inline]
21    fn next(&mut self) -> Option<Self::Item> {
22        self.inner.next()
23    }
24
25    #[inline]
26    fn size_hint(&self) -> (usize, Option<usize>) {
27        self.inner.size_hint()
28    }
29}
30
31impl<T> DoubleEndedIterator for Drain<'_, T> {
32    #[inline]
33    fn next_back(&mut self) -> Option<Self::Item> {
34        self.inner.next_back()
35    }
36}
37
38impl<T> ExactSizeIterator for Drain<'_, T> {
39    #[inline]
40    fn len(&self) -> usize {
41        self.inner.len()
42    }
43}
44
45impl<T> FusedIterator for Drain<'_, T> {}