Struct layout_2020::flow::inline::construct::WhitespaceCollapse
source · pub struct WhitespaceCollapse<InputIterator> {
char_iterator: InputIterator,
white_space_collapse: T,
remove_collapsible_white_space_at_start: bool,
following_newline: bool,
have_seen_non_white_space_characters: bool,
inside_white_space: bool,
character_pending_to_return: Option<char>,
}
Fields§
§char_iterator: InputIterator
§white_space_collapse: T
§remove_collapsible_white_space_at_start: bool
Whether or not we should collapse white space completely at the start of the string.
This is true when the last character handled in our owning super::InlineFormattingContext
was collapsible white space.
following_newline: bool
Whether or not the last character produced was newline. There is special behavior we do after each newline.
have_seen_non_white_space_characters: bool
Whether or not we have seen any non-white space characters, indicating that we are not in a collapsible white space section at the beginning of the string.
inside_white_space: bool
Whether the last character that we processed was a non-newline white space character. When collapsing white space we need to wait until the next non-white space character or the end of the string to push a single white space.
character_pending_to_return: Option<char>
When we enter a collapsible white space region, we may need to wait to produce a single white space character as soon as we encounter a non-white space character. When that happens we queue up the non-white space character for the next iterator call.
Implementations§
source§impl<InputIterator> WhitespaceCollapse<InputIterator>
impl<InputIterator> WhitespaceCollapse<InputIterator>
pub fn new( char_iterator: InputIterator, white_space_collapse: WhiteSpaceCollapse, trim_beginning_white_space: bool, ) -> Self
fn is_leading_trimmed_white_space(&self) -> bool
sourcefn need_to_produce_space_character_after_white_space(&self) -> bool
fn need_to_produce_space_character_after_white_space(&self) -> bool
Whether or not we need to produce a space character if the next character is not a newline and not white space. This happens when we are exiting a section of white space and we waited to produce a single space character for the entire section of white space (but not following or preceding a newline).
Trait Implementations§
source§impl<InputIterator> Iterator for WhitespaceCollapse<InputIterator>
impl<InputIterator> Iterator for WhitespaceCollapse<InputIterator>
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Auto Trait Implementations§
impl<InputIterator> Freeze for WhitespaceCollapse<InputIterator>where
InputIterator: Freeze,
impl<InputIterator> RefUnwindSafe for WhitespaceCollapse<InputIterator>where
InputIterator: RefUnwindSafe,
impl<InputIterator> Send for WhitespaceCollapse<InputIterator>where
InputIterator: Send,
impl<InputIterator> Sync for WhitespaceCollapse<InputIterator>where
InputIterator: Sync,
impl<InputIterator> Unpin for WhitespaceCollapse<InputIterator>where
InputIterator: Unpin,
impl<InputIterator> UnwindSafe for WhitespaceCollapse<InputIterator>where
InputIterator: UnwindSafe,
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returns true
. Read moresource§fn while_some<A>(self) -> WhileSome<Self>
fn while_some<A>(self) -> WhileSome<Self>
Option<A>
iterator elements
and produces A
. Stops on the first None
encountered. Read moresource§fn tuple_combinations<T>(self) -> TupleCombinations<Self, T>
fn tuple_combinations<T>(self) -> TupleCombinations<Self, T>
source§fn combinations(self, k: usize) -> Combinations<Self>
fn combinations(self, k: usize) -> Combinations<Self>
k
-length combinations of
the elements from an iterator. Read moresource§fn combinations_with_replacement(
self,
k: usize,
) -> CombinationsWithReplacement<Self>
fn combinations_with_replacement( self, k: usize, ) -> CombinationsWithReplacement<Self>
k
-length combinations of
the elements from an iterator, with replacement. Read moresource§fn permutations(self, k: usize) -> Permutations<Self>
fn permutations(self, k: usize) -> Permutations<Self>
source§fn powerset(self) -> Powerset<Self>
fn powerset(self) -> Powerset<Self>
source§fn pad_using<F>(self, min: usize, f: F) -> PadUsing<Self, F>
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. Read moresource§fn with_position(self) -> WithPosition<Self>where
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source§fn update<F>(self, updater: F) -> Update<Self, F>
fn update<F>(self, updater: F) -> Update<Self, F>
source§fn next_tuple<T>(&mut self) -> Option<T>
fn next_tuple<T>(&mut self) -> Option<T>
source§fn collect_tuple<T>(self) -> Option<T>
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source§fn find_position<P>(&mut self, pred: P) -> Option<(usize, Self::Item)>
fn find_position<P>(&mut self, pred: P) -> Option<(usize, Self::Item)>
source§fn find_or_last<P>(self, predicate: P) -> Option<Self::Item>
fn find_or_last<P>(self, predicate: P) -> Option<Self::Item>
source§fn find_or_first<P>(self, predicate: P) -> Option<Self::Item>
fn find_or_first<P>(self, predicate: P) -> Option<Self::Item>
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source§fn dropping(self, n: usize) -> Selfwhere
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Self: Sized,
.collect_vec()
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source§fn set_from<'a, A, J>(&mut self, from: J) -> usize
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self
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. Read moresource§fn format(self, sep: &str) -> Format<'_, Self>where
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sep
. Read moresource§fn format_with<F>(self, sep: &str, format: F) -> FormatWith<'_, Self, F>
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. Read moresource§fn fold_results<A, E, B, F>(&mut self, start: B, f: F) -> Result<B, E>
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.fold_ok()
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Result
values from an iterator. Read moresource§fn fold_options<A, B, F>(&mut self, start: B, f: F) -> Option<B>
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fn fold1<F>(self, f: F) -> Option<Self::Item>
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source§fn product1<P>(self) -> Option<P>
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source§fn sorted_unstable(self) -> IntoIter<Self::Item>
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source§fn sorted_unstable_by_key<K, F>(self, f: F) -> IntoIter<Self::Item>
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source§fn sorted(self) -> IntoIter<Self::Item>
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source§fn sorted_by<F>(self, cmp: F) -> IntoIter<Self::Item>
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source§fn sorted_by_key<K, F>(self, f: F) -> IntoIter<Self::Item>
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source§fn sorted_by_cached_key<K, F>(self, f: F) -> IntoIter<Self::Item>
fn sorted_by_cached_key<K, F>(self, f: F) -> IntoIter<Self::Item>
source§fn k_smallest(self, k: usize) -> IntoIter<Self::Item>
fn k_smallest(self, k: usize) -> IntoIter<Self::Item>
source§fn partition_map<A, B, F, L, R>(self, predicate: F) -> (A, B)
fn partition_map<A, B, F, L, R>(self, predicate: F) -> (A, B)
Iterator::partition
, each partition may
have a distinct type. Read moresource§fn partition_result<A, B, T, E>(self) -> (A, B)
fn partition_result<A, B, T, E>(self) -> (A, B)
Result
s into one list of all the Ok
elements
and another list of all the Err
elements. Read moresource§fn into_group_map<K, V>(self) -> HashMap<K, Vec<V>>
fn into_group_map<K, V>(self) -> HashMap<K, Vec<V>>
HashMap
of keys mapped to Vec
s of values. Keys and values
are taken from (Key, Value)
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fn into_group_map_by<K, V, F>(self, f: F) -> HashMap<K, Vec<V>>
Iterator
on a HashMap
. Keys mapped to Vec
s of values. The key is specified
in the closure. Read moresource§fn into_grouping_map<K, V>(self) -> GroupingMap<Self>
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GroupingMap
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self,
key_mapper: F,
) -> GroupingMap<MapForGrouping<Self, F>>
fn into_grouping_map_by<K, V, F>( self, key_mapper: F, ) -> GroupingMap<MapForGrouping<Self, F>>
GroupingMap
to be used later with one of the efficient
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source§fn max_set_by_key<K, F>(self, key: F) -> Vec<Self::Item>
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source§fn minmax(self) -> MinMaxResult<Self::Item>
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source§fn minmax_by_key<K, F>(self, key: F) -> MinMaxResult<Self::Item>
fn minmax_by_key<K, F>(self, key: F) -> MinMaxResult<Self::Item>
source§fn minmax_by<F>(self, compare: F) -> MinMaxResult<Self::Item>
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fn position_min_by_key<K, F>(self, key: F) -> Option<usize>
source§fn position_min_by<F>(self, compare: F) -> Option<usize>
fn position_min_by<F>(self, compare: F) -> Option<usize>
source§fn position_minmax(self) -> MinMaxResult<usize>
fn position_minmax(self) -> MinMaxResult<usize>
source§fn position_minmax_by_key<K, F>(self, key: F) -> MinMaxResult<usize>
fn position_minmax_by_key<K, F>(self, key: F) -> MinMaxResult<usize>
source§fn position_minmax_by<F>(self, compare: F) -> MinMaxResult<usize>
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source§fn exactly_one(self) -> Result<Self::Item, ExactlyOneError<Self>>where
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Self: Sized,
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source§fn multipeek(self) -> MultiPeek<Self>where
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fn multipeek(self) -> MultiPeek<Self>where
Self: Sized,
.next()
values without advancing the base iterator. Read moresource§fn counts(self) -> HashMap<Self::Item, usize>
fn counts(self) -> HashMap<Self::Item, usize>
HashMap
which
contains each item that appears in the iterator and the number
of times it appears. Read moresource§fn counts_by<K, F>(self, f: F) -> HashMap<K, usize>
fn counts_by<K, F>(self, f: F) -> HashMap<K, usize>
HashMap
which
contains each item that appears in the iterator and the number
of times it appears,
determining identity using a keying function. Read moresource§fn multiunzip<FromI>(self) -> FromIwhere
Self: Sized + MultiUnzip<FromI>,
fn multiunzip<FromI>(self) -> FromIwhere
Self: Sized + MultiUnzip<FromI>,
source§impl<T> Itertools for T
impl<T> Itertools for T
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self,
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source§fn intersperse(
self,
element: Self::Item,
) -> IntersperseWith<Self, IntersperseElementSimple<Self::Item>>
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source§fn get<R>(self, index: R) -> <R as IteratorIndex<Self>>::Outputwhere
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Self: Sized,
R: IteratorIndex<Self>,
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self,
other: J,
) -> ZipLongest<Self, <J as IntoIterator>::IntoIter>where
J: IntoIterator,
Self: Sized,
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self,
other: J,
) -> ZipLongest<Self, <J as IntoIterator>::IntoIter>where
J: IntoIterator,
Self: Sized,
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Self: Sized,
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source§fn chunk_by<K, F>(self, key: F) -> ChunkBy<K, Self, F>
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source§fn group_by<K, F>(self, key: F) -> ChunkBy<K, Self, F>
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.chunk_by()
.source§fn chunks(self, size: usize) -> IntoChunks<Self>where
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T: HomogeneousTuple,
<T as TupleCollect>::Item: Clone,
fn tuple_windows<T>(self) -> TupleWindows<Self, T>where
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T: HomogeneousTuple,
<T as TupleCollect>::Item: Clone,
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T: TupleCollect + Clone,
<T as TupleCollect>::Item: Clone,
fn circular_tuple_windows<T>(self) -> CircularTupleWindows<Self, T>where
Self: Sized + Clone + Iterator<Item = <T as TupleCollect>::Item> + ExactSizeIterator,
T: TupleCollect + Clone,
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source§fn map_into<R>(self) -> MapSpecialCase<Self, MapSpecialCaseFnInto<R>>
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Result::Ok
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Result::Ok
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values are unchanged. Read moresource§fn process_results<F, T, E, R>(self, processor: F) -> Result<R, E>
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Result
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self,
other: J,
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self,
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is_first: F,
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self,
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cmp_fn: F,
) -> MergeBy<Self, <J as IntoIterator>::IntoIter, MergeFuncLR<F, <F as FuncLR<Self::Item, <<J as IntoIterator>::IntoIter as Iterator>::Item>>::T>>
fn merge_join_by<J, F, T>( self, other: J, cmp_fn: F, ) -> MergeBy<Self, <J as IntoIterator>::IntoIter, MergeFuncLR<F, <F as FuncLR<Self::Item, <<J as IntoIterator>::IntoIter as Iterator>::Item>>::T>>
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source§fn kmerge_by<F>(
self,
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) -> KMergeBy<<Self::Item as IntoIterator>::IntoIter, F>where
Self: Sized,
Self::Item: IntoIterator,
F: FnMut(&<Self::Item as IntoIterator>::Item, &<Self::Item as IntoIterator>::Item) -> bool,
fn kmerge_by<F>(
self,
first: F,
) -> KMergeBy<<Self::Item as IntoIterator>::IntoIter, F>where
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Self::Item: IntoIterator,
F: FnMut(&<Self::Item as IntoIterator>::Item, &<Self::Item as IntoIterator>::Item) -> bool,
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self
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. Read moresource§fn multi_cartesian_product(
self,
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Self: Sized,
Self::Item: IntoIterator,
<Self::Item as IntoIterator>::IntoIter: Clone,
<Self::Item as IntoIterator>::Item: Clone,
fn multi_cartesian_product(
self,
) -> MultiProduct<<Self::Item as IntoIterator>::IntoIter>where
Self: Sized,
Self::Item: IntoIterator,
<Self::Item as IntoIterator>::IntoIter: Clone,
<Self::Item as IntoIterator>::Item: Clone,
self
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self,
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source§fn duplicates_by<V, F>(self, f: F) -> DuplicatesBy<Self, V, ByFn<F>>
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source§fn peeking_take_while<F>(&mut self, accept: F) -> PeekingTakeWhile<'_, Self, F>
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. Read moresource§fn take_while_ref<F>(&mut self, accept: F) -> TakeWhileRef<'_, Self, F>
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Clone
-able iterator
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. Read moresource§fn take_while_inclusive<F>(self, accept: F) -> TakeWhileInclusive<Self, F>
fn take_while_inclusive<F>(self, accept: F) -> TakeWhileInclusive<Self, F>
true
, including the element for which the predicate
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. Read moresource§fn while_some<A>(self) -> WhileSome<Self>
fn while_some<A>(self) -> WhileSome<Self>
Option<A>
iterator elements
and produces A
. Stops on the first None
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fn tuple_combinations<T>(self) -> TupleCombinations<Self, T>
source§fn combinations(self, k: usize) -> Combinations<Self>
fn combinations(self, k: usize) -> Combinations<Self>
k
-length combinations of
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self,
k: usize,
) -> CombinationsWithReplacement<Self>
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k
-length combinations of
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fn permutations(self, k: usize) -> Permutations<Self>
source§fn powerset(self) -> Powerset<Self>
fn powerset(self) -> Powerset<Self>
source§fn pad_using<F>(self, min: usize, f: F) -> PadUsing<Self, F>
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min
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. Read moresource§fn with_position(self) -> WithPosition<Self>where
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Position
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source§fn find_position<P>(&mut self, pred: P) -> Option<(usize, Self::Item)>
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fn find_or_last<P>(self, predicate: P) -> Option<Self::Item>
source§fn find_or_first<P>(self, predicate: P) -> Option<Self::Item>
fn find_or_first<P>(self, predicate: P) -> Option<Self::Item>
source§fn contains<Q>(&mut self, query: &Q) -> bool
fn contains<Q>(&mut self, query: &Q) -> bool
true
if the given item is present in this iterator. Read moresource§fn all_equal_value(
&mut self,
) -> Result<Self::Item, Option<(Self::Item, Self::Item)>>
fn all_equal_value( &mut self, ) -> Result<Self::Item, Option<(Self::Item, Self::Item)>>
source§fn all_unique(&mut self) -> bool
fn all_unique(&mut self) -> bool
source§fn dropping(self, n: usize) -> Selfwhere
Self: Sized,
fn dropping(self, n: usize) -> Selfwhere
Self: Sized,
n
elements from the iterator eagerly,
and return the same iterator again. Read moresource§fn dropping_back(self, n: usize) -> Selfwhere
Self: Sized + DoubleEndedIterator,
fn dropping_back(self, n: usize) -> Selfwhere
Self: Sized + DoubleEndedIterator,
n
elements from the iterator eagerly,
and return the same iterator again. Read moresource§fn collect_vec(self) -> Vec<Self::Item>where
Self: Sized,
fn collect_vec(self) -> Vec<Self::Item>where
Self: Sized,
.collect_vec()
is simply a type specialization of Iterator::collect
,
for convenience.source§fn try_collect<T, U, E>(self) -> Result<U, E>
fn try_collect<T, U, E>(self) -> Result<U, E>
source§fn set_from<'a, A, J>(&mut self, from: J) -> usize
fn set_from<'a, A, J>(&mut self, from: J) -> usize
self
from the from
iterator,
stopping at the shortest of the two iterators. Read moresource§fn format(self, sep: &str) -> Format<'_, Self>where
Self: Sized,
fn format(self, sep: &str) -> Format<'_, Self>where
Self: Sized,
sep
. Read moresource§fn format_with<F>(self, sep: &str, format: F) -> FormatWith<'_, Self, F>
fn format_with<F>(self, sep: &str, format: F) -> FormatWith<'_, Self, F>
sep
. Read moresource§fn fold_ok<A, E, B, F>(&mut self, start: B, f: F) -> Result<B, E>
fn fold_ok<A, E, B, F>(&mut self, start: B, f: F) -> Result<B, E>
Result
values from an iterator. Read moresource§fn fold_options<A, B, F>(&mut self, start: B, f: F) -> Option<B>
fn fold_options<A, B, F>(&mut self, start: B, f: F) -> Option<B>
Option
values from an iterator. Read moresource§fn fold1<F>(self, f: F) -> Option<Self::Item>
fn fold1<F>(self, f: F) -> Option<Self::Item>
Iterator::reduce
insteadsource§fn tree_reduce<F>(self, f: F) -> Option<Self::Item>
fn tree_reduce<F>(self, f: F) -> Option<Self::Item>
source§fn tree_fold1<F>(self, f: F) -> Option<Self::Item>
fn tree_fold1<F>(self, f: F) -> Option<Self::Item>
.tree_reduce()
.source§fn fold_while<B, F>(&mut self, init: B, f: F) -> FoldWhile<B>
fn fold_while<B, F>(&mut self, init: B, f: F) -> FoldWhile<B>
source§fn sum1<S>(self) -> Option<S>
fn sum1<S>(self) -> Option<S>
source§fn product1<P>(self) -> Option<P>
fn product1<P>(self) -> Option<P>
source§fn sorted_unstable(self) -> IntoIter<Self::Item>
fn sorted_unstable(self) -> IntoIter<Self::Item>
source§fn sorted_unstable_by<F>(self, cmp: F) -> IntoIter<Self::Item>
fn sorted_unstable_by<F>(self, cmp: F) -> IntoIter<Self::Item>
source§fn sorted_unstable_by_key<K, F>(self, f: F) -> IntoIter<Self::Item>
fn sorted_unstable_by_key<K, F>(self, f: F) -> IntoIter<Self::Item>
source§fn sorted(self) -> IntoIter<Self::Item>
fn sorted(self) -> IntoIter<Self::Item>
source§fn sorted_by<F>(self, cmp: F) -> IntoIter<Self::Item>
fn sorted_by<F>(self, cmp: F) -> IntoIter<Self::Item>
source§fn sorted_by_key<K, F>(self, f: F) -> IntoIter<Self::Item>
fn sorted_by_key<K, F>(self, f: F) -> IntoIter<Self::Item>
source§fn sorted_by_cached_key<K, F>(self, f: F) -> IntoIter<Self::Item>
fn sorted_by_cached_key<K, F>(self, f: F) -> IntoIter<Self::Item>
source§fn k_smallest(self, k: usize) -> IntoIter<Self::Item>
fn k_smallest(self, k: usize) -> IntoIter<Self::Item>
source§fn k_smallest_by<F>(self, k: usize, cmp: F) -> IntoIter<Self::Item>
fn k_smallest_by<F>(self, k: usize, cmp: F) -> IntoIter<Self::Item>
source§fn k_smallest_by_key<F, K>(self, k: usize, key: F) -> IntoIter<Self::Item>
fn k_smallest_by_key<F, K>(self, k: usize, key: F) -> IntoIter<Self::Item>
source§fn k_largest(self, k: usize) -> IntoIter<Self::Item>
fn k_largest(self, k: usize) -> IntoIter<Self::Item>
source§fn k_largest_by<F>(self, k: usize, cmp: F) -> IntoIter<Self::Item>
fn k_largest_by<F>(self, k: usize, cmp: F) -> IntoIter<Self::Item>
source§fn k_largest_by_key<F, K>(self, k: usize, key: F) -> IntoIter<Self::Item>
fn k_largest_by_key<F, K>(self, k: usize, key: F) -> IntoIter<Self::Item>
source§fn tail(self, n: usize) -> IntoIter<Self::Item>where
Self: Sized,
fn tail(self, n: usize) -> IntoIter<Self::Item>where
Self: Sized,
n
elements. Read moresource§fn partition_map<A, B, F, L, R>(self, predicate: F) -> (A, B)
fn partition_map<A, B, F, L, R>(self, predicate: F) -> (A, B)
Iterator::partition
, each partition may
have a distinct type. Read moresource§fn partition_result<A, B, T, E>(self) -> (A, B)
fn partition_result<A, B, T, E>(self) -> (A, B)
Result
s into one list of all the Ok
elements
and another list of all the Err
elements. Read moresource§fn into_group_map<K, V>(self) -> HashMap<K, Vec<V>>
fn into_group_map<K, V>(self) -> HashMap<K, Vec<V>>
HashMap
of keys mapped to Vec
s of values. Keys and values
are taken from (Key, Value)
tuple pairs yielded by the input iterator. Read moresource§fn into_group_map_by<K, V, F>(self, f: F) -> HashMap<K, Vec<V>>
fn into_group_map_by<K, V, F>(self, f: F) -> HashMap<K, Vec<V>>
Iterator
on a HashMap
. Keys mapped to Vec
s of values. The key is specified
in the closure. Read moresource§fn into_grouping_map<K, V>(self) -> GroupingMap<Self>
fn into_grouping_map<K, V>(self) -> GroupingMap<Self>
GroupingMap
to be used later with one of the efficient
group-and-fold operations it allows to perform. Read moresource§fn into_grouping_map_by<K, V, F>(
self,
key_mapper: F,
) -> GroupingMap<MapSpecialCase<Self, GroupingMapFn<F>>>
fn into_grouping_map_by<K, V, F>( self, key_mapper: F, ) -> GroupingMap<MapSpecialCase<Self, GroupingMapFn<F>>>
GroupingMap
to be used later with one of the efficient
group-and-fold operations it allows to perform. Read moresource§fn min_set_by<F>(self, compare: F) -> Vec<Self::Item>
fn min_set_by<F>(self, compare: F) -> Vec<Self::Item>
source§fn min_set_by_key<K, F>(self, key: F) -> Vec<Self::Item>
fn min_set_by_key<K, F>(self, key: F) -> Vec<Self::Item>
source§fn max_set_by<F>(self, compare: F) -> Vec<Self::Item>
fn max_set_by<F>(self, compare: F) -> Vec<Self::Item>
source§fn max_set_by_key<K, F>(self, key: F) -> Vec<Self::Item>
fn max_set_by_key<K, F>(self, key: F) -> Vec<Self::Item>
source§fn minmax(self) -> MinMaxResult<Self::Item>
fn minmax(self) -> MinMaxResult<Self::Item>
source§fn minmax_by_key<K, F>(self, key: F) -> MinMaxResult<Self::Item>
fn minmax_by_key<K, F>(self, key: F) -> MinMaxResult<Self::Item>
source§fn minmax_by<F>(self, compare: F) -> MinMaxResult<Self::Item>
fn minmax_by<F>(self, compare: F) -> MinMaxResult<Self::Item>
source§fn position_max(self) -> Option<usize>
fn position_max(self) -> Option<usize>
source§fn position_max_by_key<K, F>(self, key: F) -> Option<usize>
fn position_max_by_key<K, F>(self, key: F) -> Option<usize>
source§fn position_max_by<F>(self, compare: F) -> Option<usize>
fn position_max_by<F>(self, compare: F) -> Option<usize>
source§fn position_min(self) -> Option<usize>
fn position_min(self) -> Option<usize>
source§fn position_min_by_key<K, F>(self, key: F) -> Option<usize>
fn position_min_by_key<K, F>(self, key: F) -> Option<usize>
source§fn position_min_by<F>(self, compare: F) -> Option<usize>
fn position_min_by<F>(self, compare: F) -> Option<usize>
source§fn position_minmax(self) -> MinMaxResult<usize>
fn position_minmax(self) -> MinMaxResult<usize>
source§fn position_minmax_by_key<K, F>(self, key: F) -> MinMaxResult<usize>
fn position_minmax_by_key<K, F>(self, key: F) -> MinMaxResult<usize>
source§fn position_minmax_by<F>(self, compare: F) -> MinMaxResult<usize>
fn position_minmax_by<F>(self, compare: F) -> MinMaxResult<usize>
source§fn exactly_one(self) -> Result<Self::Item, ExactlyOneError<Self>>where
Self: Sized,
fn exactly_one(self) -> Result<Self::Item, ExactlyOneError<Self>>where
Self: Sized,
source§fn at_most_one(self) -> Result<Option<Self::Item>, ExactlyOneError<Self>>where
Self: Sized,
fn at_most_one(self) -> Result<Option<Self::Item>, ExactlyOneError<Self>>where
Self: Sized,
Ok(None)
will be returned. If the iterator yields
exactly one element, that element will be returned, otherwise an error will be returned
containing an iterator that has the same output as the input iterator. Read moresource§fn multipeek(self) -> MultiPeek<Self>where
Self: Sized,
fn multipeek(self) -> MultiPeek<Self>where
Self: Sized,
.next()
values without advancing the base iterator. Read moresource§fn counts(self) -> HashMap<Self::Item, usize>
fn counts(self) -> HashMap<Self::Item, usize>
HashMap
which
contains each item that appears in the iterator and the number
of times it appears. Read moresource§fn counts_by<K, F>(self, f: F) -> HashMap<K, usize>
fn counts_by<K, F>(self, f: F) -> HashMap<K, usize>
HashMap
which
contains each item that appears in the iterator and the number
of times it appears,
determining identity using a keying function. Read more