Struct rustc_data_structures::unord::UnordItems

pub struct UnordItems<T, I: Iterator<Item = T>>(I);

UnordItems is the order-less version of Iterator. It only contains methods that don’t (easily) expose an ordering of the underlying items.

Most methods take an Fn where the Iterator-version takes an FnMut. This is to reduce the risk of accidentally leaking the internal order via the closure environment. Otherwise one could easily do something like

let mut ordered = vec![];
unordered_items.all(|x| ordered.push(x));

It’s still possible to do the same thing with an Fn by using interior mutability, but the chance of doing it accidentally is reduced.

Tuple Fields

0: I

Implementations

impl<T, I: Iterator<Item = T>> UnordItems<T, I>

pub fn map<U, F: Fn(T) -> U>( self, f: F ) -> UnordItems<U, impl Iterator<Item = U>>

pub fn all<F: Fn(T) -> bool>(self, f: F) -> bool

pub fn any<F: Fn(T) -> bool>(self, f: F) -> bool

pub fn filter<F: Fn(&T) -> bool>( self, f: F ) -> UnordItems<T, impl Iterator<Item = T>>

pub fn filter_map<U, F: Fn(T) -> Option<U>>( self, f: F ) -> UnordItems<U, impl Iterator<Item = U>>

pub fn max(self) -> Option<T>

where T: Ord,

pub fn min(self) -> Option<T>

where T: Ord,

pub fn sum<S>(self) -> S

where S: Sum<T>,

pub fn product<S>(self) -> S

where S: Product<T>,

pub fn count(self) -> usize

pub fn flat_map<U, F, O>(self, f: F) -> UnordItems<O, impl Iterator<Item = O>>

where U: IntoIterator<Item = O>, F: Fn(T) -> U,

pub fn collect<C: From<UnordItems<T, I>>>(self) -> C

impl<T> UnordItems<T, Empty<T>>

pub fn empty() -> Self

impl<'a, T: Clone + 'a, I: Iterator<Item = &'a T>> UnordItems<&'a T, I>

pub fn cloned(self) -> UnordItems<T, impl Iterator<Item = T>>

impl<'a, T: Copy + 'a, I: Iterator<Item = &'a T>> UnordItems<&'a T, I>

pub fn copied(self) -> UnordItems<T, impl Iterator<Item = T>>

impl<T, I: Iterator<Item = T>> UnordItems<T, I>

pub fn into_sorted<HCX>(self, hcx: &HCX) -> Vec<T>

where T: ToStableHashKey<HCX>,

pub fn into_sorted_stable_ord(self) -> Vec<T>

where T: StableCompare,

pub fn into_sorted_stable_ord_by_key<K, C>(self, project_to_key: C) -> Vec<T>

where K: StableCompare, C: for<'a> Fn(&'a T) -> &'a K,

pub fn collect_sorted<HCX, C>(self, hcx: &HCX, cache_sort_key: bool) -> C

where T: ToStableHashKey<HCX>, C: FromIterator<T> + BorrowMut<[T]>,

pub fn collect_stable_ord_by_key<K, C, P>(self, project_to_key: P) -> C

where K: StableCompare, P: for<'a> Fn(&'a T) -> &'a K, C: FromIterator<T> + BorrowMut<[T]>,

Trait Implementations

impl<T: Clone, I: Clone + Iterator<Item = T>> Clone for UnordItems<T, I>

fn clone(&self) -> UnordItems<T, I>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<K: Hash + Eq, V, I: Iterator<Item = (K, V)>> From<UnordItems<(K, V), I>> for UnordMap<K, V>

fn from(items: UnordItems<(K, V), I>) -> Self

Converts to this type from the input type.

impl<T, I: Iterator<Item = T>> From<UnordItems<T, I>> for UnordBag<T>

fn from(value: UnordItems<T, I>) -> Self

Converts to this type from the input type.

impl<V: Hash + Eq, I: Iterator<Item = V>> From<UnordItems<V, I>> for UnordSet<V>

fn from(value: UnordItems<V, I>) -> Self

Converts to this type from the input type.

impl<T, I> !IntoIterator for UnordItems<T, I>

type Item

The type of the elements being iterated over.

type IntoIter: Iterator<Item = Self::Item>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

Layout

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.