Struct OnceWith
pub struct OnceWith<F> { pub(in ::iter::sources::once_with) make: Option<F> }An iterator that yields a single element of type A by
applying the provided closure F: FnOnce() -> A.
This struct is created by the [once_with()] function.
See its documentation for more.
Fields
make: Option<F>
Trait Implementations
impl<A, F: FnOnce() -> A> DoubleEndedIterator for OnceWith<F>
fn next_back(&mut self) -> Option<A>
impl<A, F: FnOnce() -> A> ExactSizeIterator for OnceWith<F>
fn len(&self) -> usize
impl<A, F: FnOnce() -> A> FusedIterator for OnceWith<F>
impl<A, F: FnOnce() -> A> Iterator for OnceWith<F>
type Item = A;fn next(&mut self) -> Option<A>fn size_hint(&self) -> (usize, Option<usize>)
impl<A, F: FnOnce() -> A> TrustedLen for OnceWith<F>
impl<F> Debug for OnceWith<F>
fn fmt(&self, f: &mut Formatter<'_>) -> Result
impl<F> OneShot for OnceWith<F>
impl<F: Clone> Clone for OnceWith<F>
fn clone(&self) -> OnceWith<F>
Auto Trait Implementations
impl<F> Freeze for OnceWith<F>
where
Option<F>: Freeze,
impl<F> RefUnwindSafe for OnceWith<F>
where
Option<F>: RefUnwindSafe,
impl<F> Send for OnceWith<F>
where
Option<F>: Send,
impl<F> Sync for OnceWith<F>
where
Option<F>: Sync,
impl<F> Unpin for OnceWith<F>
where
Option<F>: Unpin,
impl<F> UnsafeUnpin for OnceWith<F>
where
Option<F>: UnsafeUnpin,
impl<F> UnwindSafe for OnceWith<F>
where
Option<F>: UnwindSafe,
Blanket Implementations
impl<I> IntoIterator for OnceWith<F>
where
I: Iterator,
type Item = <I as Iterator>::Item;type IntoIter = I;fn into_iter(self) -> I
impl<T> Any for OnceWith<F>
where
T: 'static + ?Sized,
fn type_id(&self) -> TypeId
impl<T> Borrow<T> for OnceWith<F>
where
T: ?Sized,
fn borrow(&self) -> &T
impl<T> BorrowMut<T> for OnceWith<F>
where
T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
impl<T> CloneToUninit for OnceWith<F>
where
T: Clone,
unsafe fn clone_to_uninit(&self, dest: *mut u8)
impl<T> From<T> for OnceWith<F>
fn from(t: T) -> TReturns the argument unchanged.
impl<T> SizeHint for OnceWith<F>
where
T: ?Sized,
fn lower_bound(&self) -> usizefn upper_bound(&self) -> Option<usize>
impl<T> SizedTypeProperties for OnceWith<F>
impl<T, U> Into<U> for OnceWith<F>
where
U: From<T>,
fn into(self) -> UCalls
U::from(self).That is, this conversion is whatever the implementation of
[From]<T> for Uchooses to do.
impl<T, U> TryFrom<U> for OnceWith<F>
where
U: Into<T>,
type Error = Infallible;fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
impl<T, U> TryInto<U> for OnceWith<F>
where
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error;fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>