Struct rhit::GroupBy [−][src]
GroupBy
is the storage for the lazy grouping operation.
If the groups are consumed in their original order, or if each
group is dropped without keeping it around, then GroupBy
uses
no allocations. It needs allocations only if several group iterators
are alive at the same time.
This type implements IntoIterator
(it is not an iterator
itself), because the group iterators need to borrow from this
value. It should be stored in a local variable or temporary and
iterated.
See .group_by()
for more information.
Trait Implementations
impl<'a, K, I, F> IntoIterator for &'a GroupBy<K, I, F> where
K: PartialEq<K>,
I: Iterator,
F: FnMut(&<I as Iterator>::Item) -> K,
<I as Iterator>::Item: 'a,
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K: PartialEq<K>,
I: Iterator,
F: FnMut(&<I as Iterator>::Item) -> K,
<I as Iterator>::Item: 'a,
Auto Trait Implementations
impl<K, I, F> !RefUnwindSafe for GroupBy<K, I, F>
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impl<K, I, F> Send for GroupBy<K, I, F> where
F: Send,
I: Send,
K: Send,
<I as Iterator>::Item: Send,
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F: Send,
I: Send,
K: Send,
<I as Iterator>::Item: Send,
impl<K, I, F> !Sync for GroupBy<K, I, F>
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impl<K, I, F> Unpin for GroupBy<K, I, F> where
F: Unpin,
I: Unpin,
K: Unpin,
<I as Iterator>::Item: Unpin,
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F: Unpin,
I: Unpin,
K: Unpin,
<I as Iterator>::Item: Unpin,
impl<K, I, F> UnwindSafe for GroupBy<K, I, F> where
F: UnwindSafe,
I: UnwindSafe,
K: UnwindSafe,
<I as Iterator>::Item: RefUnwindSafe + UnwindSafe,
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F: UnwindSafe,
I: UnwindSafe,
K: UnwindSafe,
<I as Iterator>::Item: RefUnwindSafe + UnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut Tⓘ
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impl<T> From<T> for T
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impl<T> Fun for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> Pointable for T
pub const ALIGN: usize
type Init = T
The type for initializers.
pub unsafe fn init(init: <T as Pointable>::Init) -> usize
pub unsafe fn deref<'a>(ptr: usize) -> &'a Tⓘ
pub unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut Tⓘ
pub unsafe fn drop(ptr: usize)
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,