Struct tract_core::prelude::tract_itertools::structs::GroupBy[−][src]

#[must_use = "iterator adaptors are lazy and do nothing unless consumed"]
pub struct GroupBy<K, I, F> where
    I: Iterator,  { /* fields omitted */ }
Expand description

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
    F: FnMut(&<I as Iterator>::Item) -> K,
    K: PartialEq<K>,
    I: Iterator,
    <I as Iterator>::Item: 'a, [src]

type Item = (K, Group<'a, K, I, F>)

The type of the elements being iterated over.

type IntoIter = Groups<'a, K, I, F>

Which kind of iterator are we turning this into?

pub fn into_iter(self) -> <&'a GroupBy<K, I, F> as IntoIterator>::IntoIter[src]

Creates an iterator from a value. Read more

Auto Trait Implementations

impl<K, I, F> !RefUnwindSafe for GroupBy<K, I, F>

impl<K, I, F> Send for GroupBy<K, I, F> where
    F: Send,
    I: Send,
    K: Send,
    <I as Iterator>::Item: Send, 

impl<K, I, F> !Sync for GroupBy<K, I, F>

impl<K, I, F> Unpin for GroupBy<K, I, F> where
    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, 

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized, [src]

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

impl<T> Downcast for T where
    T: Any, [src]

pub fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>ⓘ

Notable traits for Box<R, Global>

impl<R> Read for Box<R, Global> where
    R: Read + ?Sized, impl<W> Write for Box<W, Global> where
    W: Write + ?Sized, impl<F, A> Future for Box<F, A> where
    F: Future + Unpin + ?Sized,
    A: Allocator + 'static,  type Output = <F as Future>::Output;impl<I, A> Iterator for Box<I, A> where
    A: Allocator,
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;
[src]

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait. Read more

pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>[src]

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait. Read more

pub fn as_any(&self) -> &(dyn Any + 'static)[src]

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s. Read more

pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)[src]

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s. Read more

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

Performs the conversion.

impl<T, U> Into<U> for T where
    U: From<T>, [src]

pub fn into(self) -> U[src]

Performs the conversion.

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

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>[src]

Performs the conversion.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

Performs the conversion.