core::iter::traits::double_ended

Trait DoubleEndedIteratorRefSpec

Source 
trait DoubleEndedIteratorRefSpec: DoubleEndedIterator {
    // Required methods
    fn spec_rfold<B, F>(self, init: B, f: F) -> B
       where F: FnMut(B, Self::Item) -> B;
    fn spec_try_rfold<B, F, R>(&mut self, init: B, f: F) -> R
       where F: FnMut(B, Self::Item) -> R,
             R: Try<Output = B>;
}
Expand description

Helper trait to specialize rfold and rtry_fold for &mut I where I: Sized

Required Methods§

Source

fn spec_rfold<B, F>(self, init: B, f: F) -> B
where F: FnMut(B, Self::Item) -> B,

Source

fn spec_try_rfold<B, F, R>(&mut self, init: B, f: F) -> R
where F: FnMut(B, Self::Item) -> R, R: Try<Output = B>,

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.

Implementors§