pub trait PeekingNext: Iterator {
// Required method
fn peeking_next<F>(&mut self, accept: F) -> Option<Self::Item>
where Self: Sized,
F: FnOnce(&Self::Item) -> bool;
}
Expand description
An iterator that allows peeking at an element before deciding to accept it.
See .peeking_take_while()
for more information.
This is implemented by peeking adaptors like peekable and put back,
but also by a few iterators that can be peeked natively, like the slice’s
by reference iterator (std::slice::Iter
).
Required Methods§
Implementations on Foreign Types§
Source§impl<'a> PeekingNext for Bytes<'a>
impl<'a> PeekingNext for Bytes<'a>
Source§impl<'a> PeekingNext for CharIndices<'a>
impl<'a> PeekingNext for CharIndices<'a>
Source§impl<'a> PeekingNext for Chars<'a>
impl<'a> PeekingNext for Chars<'a>
Source§impl<'a, T> PeekingNext for Iter<'a, T>
impl<'a, T> PeekingNext for Iter<'a, T>
Source§impl<'a, T> PeekingNext for Iter<'a, T>
impl<'a, T> PeekingNext for Iter<'a, T>
Source§impl<'a, T> PeekingNext for Iter<'a, T>
impl<'a, T> PeekingNext for Iter<'a, T>
Source§impl<'a, T> PeekingNext for Iter<'a, T>
impl<'a, T> PeekingNext for Iter<'a, T>
Source§impl<'a, T> PeekingNext for Iter<'a, T>
impl<'a, T> PeekingNext for Iter<'a, T>
Source§impl<I> PeekingNext for &mut Iwhere
I: PeekingNext,
impl<I> PeekingNext for &mut Iwhere
I: PeekingNext,
Source§impl<I> PeekingNext for Peekable<I>where
I: Iterator,
impl<I> PeekingNext for Peekable<I>where
I: Iterator,
Source§impl<I: Clone + PeekingNext + DoubleEndedIterator> PeekingNext for Rev<I>
impl<I: Clone + PeekingNext + DoubleEndedIterator> PeekingNext for Rev<I>
Source§impl<T> PeekingNext for Empty<T>
impl<T> PeekingNext for Empty<T>
Implementors§
impl<I> PeekingNext for MultiPeek<I>where
I: Iterator,
impl<I> PeekingNext for PeekNth<I>where
I: Iterator,
impl<I> PeekingNext for PutBack<I>where
I: Iterator,
impl<I> PeekingNext for PutBackN<I>where
I: Iterator,
Available on crate feature
use_alloc
only.