pub trait PeekingNext: Iterator {
// Required method
fn peeking_next<F>(&mut self, accept: F) -> Option<Self::Item>
where 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§
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.