self.spec_try_fold(init, f)
}
- #[inline]
- fn fold<B, F>(mut self, init: B, f: F) -> B
- where
- Self: Sized,
- F: FnMut(B, Self::Item) -> B,
- {
- #[inline]
- fn ok<B, T>(mut f: impl FnMut(B, T) -> B) -> impl FnMut(B, T) -> Result<B, !> {
- move |acc, x| Ok(f(acc, x))
- }
-
- self.try_fold(init, ok(f)).unwrap()
- }
+ impl_fold_via_try_fold! { fold -> try_fold }
#[inline]
fn last(mut self) -> Option<A> {
self.spec_try_rfold(init, f)
}
- #[inline]
- fn rfold<B, F>(mut self, init: B, f: F) -> B
- where
- Self: Sized,
- F: FnMut(B, Self::Item) -> B,
- {
- #[inline]
- fn ok<B, T>(mut f: impl FnMut(B, T) -> B) -> impl FnMut(B, T) -> Result<B, !> {
- move |acc, x| Ok(f(acc, x))
- }
-
- self.try_rfold(init, ok(f)).unwrap()
- }
+ impl_fold_via_try_fold! { rfold -> try_rfold }
}
// Safety: See above implementation for `ops::Range<A>`