pub struct TakeWhile<I, P> { /* private fields */ }
Expand description
An iterator that only accepts elements while predicate
returns true
.
This struct
is created by the take_while
method on Iterator
. See its
documentation for more.
Trait Implementations§
source§impl<I, P> Iterator for TakeWhile<I, P>
impl<I, P> Iterator for TakeWhile<I, P>
source§fn next(&mut self) -> Option<<I as Iterator>::Item>
fn next(&mut self) -> Option<<I as Iterator>::Item>
Advances the iterator and returns the next value. Read more
source§fn size_hint(&self) -> (usize, Option<usize>)
fn size_hint(&self) -> (usize, Option<usize>)
Returns the bounds on the remaining length of the iterator. Read more
source§fn try_fold<Acc, Fold, R>(&mut self, init: Acc, fold: Fold) -> R
fn try_fold<Acc, Fold, R>(&mut self, init: Acc, fold: Fold) -> R
An iterator method that applies a function as long as it returns
successfully, producing a single, final value. Read more
source§fn fold<AAA, FFF>(self, init: AAA, fold: FFF) -> AAA
fn fold<AAA, FFF>(self, init: AAA, fold: FFF) -> AAA
Folds every element into an accumulator by applying an operation,
returning the final result. Read more
source§fn next_chunk<const N: usize>(
&mut self
) -> Result<[Self::Item; N], IntoIter<Self::Item, N>>where
Self: Sized,
fn next_chunk<const N: usize>(
&mut self
) -> Result<[Self::Item; N], IntoIter<Self::Item, N>>where
Self: Sized,
🔬This is a nightly-only experimental API. (
iter_next_chunk
)Advances the iterator and returns an array containing the next
N
values. Read moresource§fn count(self) -> usizewhere
Self: Sized,
fn count(self) -> usizewhere
Self: Sized,
Consumes the iterator, counting the number of iterations and returning it. Read more
source§fn last(self) -> Option<Self::Item>where
Self: Sized,
fn last(self) -> Option<Self::Item>where
Self: Sized,
Consumes the iterator, returning the last element. Read more
source§fn advance_by(&mut self, n: usize) -> Result<(), NonZeroUsize>
fn advance_by(&mut self, n: usize) -> Result<(), NonZeroUsize>
🔬This is a nightly-only experimental API. (
iter_advance_by
)Advances the iterator by
n
elements. Read moresource§fn nth(&mut self, n: usize) -> Option<Self::Item>
fn nth(&mut self, n: usize) -> Option<Self::Item>
Returns the
n
th element of the iterator. Read more1.28.0 · source§fn step_by(self, step: usize) -> StepBy<Self> ⓘwhere
Self: Sized,
fn step_by(self, step: usize) -> StepBy<Self> ⓘwhere
Self: Sized,
Creates an iterator starting at the same point, but stepping by
the given amount at each iteration. Read more
source§fn chain<U>(self, other: U) -> Chain<Self, <U as IntoIterator>::IntoIter> ⓘ
fn chain<U>(self, other: U) -> Chain<Self, <U as IntoIterator>::IntoIter> ⓘ
Takes two iterators and creates a new iterator over both in sequence. Read more
source§fn zip<U>(self, other: U) -> Zip<Self, <U as IntoIterator>::IntoIter> ⓘwhere
Self: Sized,
U: IntoIterator,
fn zip<U>(self, other: U) -> Zip<Self, <U as IntoIterator>::IntoIter> ⓘwhere
Self: Sized,
U: IntoIterator,
‘Zips up’ two iterators into a single iterator of pairs. Read more
source§fn intersperse_with<G>(self, separator: G) -> IntersperseWith<Self, G> ⓘ
fn intersperse_with<G>(self, separator: G) -> IntersperseWith<Self, G> ⓘ
🔬This is a nightly-only experimental API. (
iter_intersperse
)Creates a new iterator which places an item generated by
separator
between adjacent items of the original iterator. Read moresource§fn map<B, F>(self, f: F) -> Map<Self, F> ⓘ
fn map<B, F>(self, f: F) -> Map<Self, F> ⓘ
Takes a closure and creates an iterator which calls that closure on each
element. Read more
source§fn filter<P>(self, predicate: P) -> Filter<Self, P> ⓘ
fn filter<P>(self, predicate: P) -> Filter<Self, P> ⓘ
Creates an iterator which uses a closure to determine if an element
should be yielded. Read more
source§fn filter_map<B, F>(self, f: F) -> FilterMap<Self, F> ⓘ
fn filter_map<B, F>(self, f: F) -> FilterMap<Self, F> ⓘ
Creates an iterator that both filters and maps. Read more
source§fn enumerate(self) -> Enumerate<Self> ⓘwhere
Self: Sized,
fn enumerate(self) -> Enumerate<Self> ⓘwhere
Self: Sized,
Creates an iterator which gives the current iteration count as well as
the next value. Read more
source§fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P> ⓘ
fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P> ⓘ
source§fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P> ⓘ
fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P> ⓘ
Creates an iterator that yields elements based on a predicate. Read more
1.57.0 · source§fn map_while<B, P>(self, predicate: P) -> MapWhile<Self, P> ⓘ
fn map_while<B, P>(self, predicate: P) -> MapWhile<Self, P> ⓘ
Creates an iterator that both yields elements based on a predicate and maps. Read more
source§fn skip(self, n: usize) -> Skip<Self> ⓘwhere
Self: Sized,
fn skip(self, n: usize) -> Skip<Self> ⓘwhere
Self: Sized,
Creates an iterator that skips the first
n
elements. Read moresource§fn take(self, n: usize) -> Take<Self> ⓘwhere
Self: Sized,
fn take(self, n: usize) -> Take<Self> ⓘwhere
Self: Sized,
Creates an iterator that yields the first
n
elements, or fewer
if the underlying iterator ends sooner. Read moresource§fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F> ⓘ
fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F> ⓘ
Creates an iterator that works like map, but flattens nested structure. Read more
source§fn map_windows<F, R, const N: usize>(self, f: F) -> MapWindows<Self, F, N> ⓘ
fn map_windows<F, R, const N: usize>(self, f: F) -> MapWindows<Self, F, N> ⓘ
🔬This is a nightly-only experimental API. (
iter_map_windows
)Calls the given function
f
for each contiguous window of size N
over
self
and returns an iterator over the outputs of f
. Like slice::windows()
,
the windows during mapping overlap as well. Read moresource§fn inspect<F>(self, f: F) -> Inspect<Self, F> ⓘ
fn inspect<F>(self, f: F) -> Inspect<Self, F> ⓘ
Does something with each element of an iterator, passing the value on. Read more
source§fn by_ref(&mut self) -> &mut Selfwhere
Self: Sized,
fn by_ref(&mut self) -> &mut Selfwhere
Self: Sized,
Borrows an iterator, rather than consuming it. Read more
source§fn collect_into<E>(self, collection: &mut E) -> &mut E
fn collect_into<E>(self, collection: &mut E) -> &mut E
🔬This is a nightly-only experimental API. (
iter_collect_into
)Collects all the items from an iterator into a collection. Read more
source§fn partition<B, F>(self, f: F) -> (B, B)
fn partition<B, F>(self, f: F) -> (B, B)
Consumes an iterator, creating two collections from it. Read more
source§fn is_partitioned<P>(self, predicate: P) -> bool
fn is_partitioned<P>(self, predicate: P) -> bool
🔬This is a nightly-only experimental API. (
iter_is_partitioned
)Checks if the elements of this iterator are partitioned according to the given predicate,
such that all those that return
true
precede all those that return false
. Read more1.27.0 · source§fn try_for_each<F, R>(&mut self, f: F) -> R
fn try_for_each<F, R>(&mut self, f: F) -> R
An iterator method that applies a fallible function to each item in the
iterator, stopping at the first error and returning that error. Read more
1.51.0 · source§fn reduce<F>(self, f: F) -> Option<Self::Item>
fn reduce<F>(self, f: F) -> Option<Self::Item>
Reduces the elements to a single one, by repeatedly applying a reducing
operation. Read more
source§fn try_reduce<F, R>(
&mut self,
f: F
) -> <<R as Try>::Residual as Residual<Option<<R as Try>::Output>>>::TryType
fn try_reduce<F, R>( &mut self, f: F ) -> <<R as Try>::Residual as Residual<Option<<R as Try>::Output>>>::TryType
🔬This is a nightly-only experimental API. (
iterator_try_reduce
)Reduces the elements to a single one by repeatedly applying a reducing operation. If the
closure returns a failure, the failure is propagated back to the caller immediately. Read more
source§fn all<F>(&mut self, f: F) -> bool
fn all<F>(&mut self, f: F) -> bool
Tests if every element of the iterator matches a predicate. Read more
source§fn any<F>(&mut self, f: F) -> bool
fn any<F>(&mut self, f: F) -> bool
Tests if any element of the iterator matches a predicate. Read more
source§fn find<P>(&mut self, predicate: P) -> Option<Self::Item>
fn find<P>(&mut self, predicate: P) -> Option<Self::Item>
Searches for an element of an iterator that satisfies a predicate. Read more
1.30.0 · source§fn find_map<B, F>(&mut self, f: F) -> Option<B>
fn find_map<B, F>(&mut self, f: F) -> Option<B>
Applies function to the elements of iterator and returns
the first non-none result. Read more
source§fn try_find<F, R>(
&mut self,
f: F
) -> <<R as Try>::Residual as Residual<Option<Self::Item>>>::TryType
fn try_find<F, R>( &mut self, f: F ) -> <<R as Try>::Residual as Residual<Option<Self::Item>>>::TryType
🔬This is a nightly-only experimental API. (
try_find
)Applies function to the elements of iterator and returns
the first true result or the first error. Read more
source§fn position<P>(&mut self, predicate: P) -> Option<usize>
fn position<P>(&mut self, predicate: P) -> Option<usize>
Searches for an element in an iterator, returning its index. Read more
1.6.0 · source§fn max_by_key<B, F>(self, f: F) -> Option<Self::Item>
fn max_by_key<B, F>(self, f: F) -> Option<Self::Item>
Returns the element that gives the maximum value from the
specified function. Read more
1.15.0 · source§fn max_by<F>(self, compare: F) -> Option<Self::Item>
fn max_by<F>(self, compare: F) -> Option<Self::Item>
Returns the element that gives the maximum value with respect to the
specified comparison function. Read more
1.6.0 · source§fn min_by_key<B, F>(self, f: F) -> Option<Self::Item>
fn min_by_key<B, F>(self, f: F) -> Option<Self::Item>
Returns the element that gives the minimum value from the
specified function. Read more
1.15.0 · source§fn min_by<F>(self, compare: F) -> Option<Self::Item>
fn min_by<F>(self, compare: F) -> Option<Self::Item>
Returns the element that gives the minimum value with respect to the
specified comparison function. Read more
source§fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB)
fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB)
Converts an iterator of pairs into a pair of containers. Read more
1.36.0 · source§fn copied<'a, T>(self) -> Copied<Self> ⓘ
fn copied<'a, T>(self) -> Copied<Self> ⓘ
Creates an iterator which copies all of its elements. Read more
source§fn array_chunks<const N: usize>(self) -> ArrayChunks<Self, N> ⓘwhere
Self: Sized,
fn array_chunks<const N: usize>(self) -> ArrayChunks<Self, N> ⓘwhere
Self: Sized,
🔬This is a nightly-only experimental API. (
iter_array_chunks
)Returns an iterator over
N
elements of the iterator at a time. Read more1.11.0 · source§fn product<P>(self) -> P
fn product<P>(self) -> P
Iterates over the entire iterator, multiplying all the elements Read more
source§fn cmp_by<I, F>(self, other: I, cmp: F) -> Ordering
fn cmp_by<I, F>(self, other: I, cmp: F) -> Ordering
🔬This is a nightly-only experimental API. (
iter_order_by
)Lexicographically compares the elements of this
Iterator
with those
of another with respect to the specified comparison function. Read more1.5.0 · source§fn partial_cmp<I>(self, other: I) -> Option<Ordering>
fn partial_cmp<I>(self, other: I) -> Option<Ordering>
Lexicographically compares the
PartialOrd
elements of
this Iterator
with those of another. The comparison works like short-circuit
evaluation, returning a result without comparing the remaining elements.
As soon as an order can be determined, the evaluation stops and a result is returned. Read moresource§fn partial_cmp_by<I, F>(self, other: I, partial_cmp: F) -> Option<Ordering>where
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, <I as IntoIterator>::Item) -> Option<Ordering>,
fn partial_cmp_by<I, F>(self, other: I, partial_cmp: F) -> Option<Ordering>where
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, <I as IntoIterator>::Item) -> Option<Ordering>,
🔬This is a nightly-only experimental API. (
iter_order_by
)Lexicographically compares the elements of this
Iterator
with those
of another with respect to the specified comparison function. Read moresource§fn eq_by<I, F>(self, other: I, eq: F) -> bool
fn eq_by<I, F>(self, other: I, eq: F) -> bool
🔬This is a nightly-only experimental API. (
iter_order_by
)1.5.0 · source§fn lt<I>(self, other: I) -> bool
fn lt<I>(self, other: I) -> bool
Determines if the elements of this
Iterator
are lexicographically
less than those of another. Read more1.5.0 · source§fn le<I>(self, other: I) -> bool
fn le<I>(self, other: I) -> bool
Determines if the elements of this
Iterator
are lexicographically
less or equal to those of another. Read more1.5.0 · source§fn gt<I>(self, other: I) -> bool
fn gt<I>(self, other: I) -> bool
Determines if the elements of this
Iterator
are lexicographically
greater than those of another. Read more1.5.0 · source§fn ge<I>(self, other: I) -> bool
fn ge<I>(self, other: I) -> bool
Determines if the elements of this
Iterator
are lexicographically
greater than or equal to those of another. Read moresource§fn is_sorted_by<F>(self, compare: F) -> bool
fn is_sorted_by<F>(self, compare: F) -> bool
🔬This is a nightly-only experimental API. (
is_sorted
)Checks if the elements of this iterator are sorted using the given comparator function. Read more
source§fn is_sorted_by_key<F, K>(self, f: F) -> bool
fn is_sorted_by_key<F, K>(self, f: F) -> bool
🔬This is a nightly-only experimental API. (
is_sorted
)Checks if the elements of this iterator are sorted using the given key extraction
function. Read more
impl<I, P> FusedIterator for TakeWhile<I, P>
Auto Trait Implementations§
impl<I, P> RefUnwindSafe for TakeWhile<I, P>where
I: RefUnwindSafe,
P: RefUnwindSafe,
impl<I, P> Send for TakeWhile<I, P>
impl<I, P> Sync for TakeWhile<I, P>
impl<I, P> Unpin for TakeWhile<I, P>
impl<I, P> UnwindSafe for TakeWhile<I, P>where
I: UnwindSafe,
P: UnwindSafe,
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
§impl<T> CheckedConversion for T
impl<T> CheckedConversion for T
§fn checked_from<T>(t: T) -> Option<Self>where
Self: TryFrom<T>,
fn checked_from<T>(t: T) -> Option<Self>where
Self: TryFrom<T>,
§fn checked_into<T>(self) -> Option<T>where
Self: TryInto<T>,
fn checked_into<T>(self) -> Option<T>where
Self: TryInto<T>,
§impl<T> Conv for T
impl<T> Conv for T
§impl<T> Downcast for Twhere
T: Any,
impl<T> Downcast for Twhere
T: Any,
§fn into_any(self: Box<T>) -> Box<dyn Any>
fn into_any(self: Box<T>) -> Box<dyn Any>
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
.§fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
Convert
Rc<Trait>
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. Rc<Any>
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Convert
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Convert
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source§impl<I> EventProcessor for I
impl<I> EventProcessor for I
source§fn not_waited() -> Error
fn not_waited() -> Error
This function is called if a received event has an unexpected type. Read more
source§fn proc<'life0, 'async_trait, T>(
&'life0 mut self,
predicate: impl Fn(RuntimeEvent) -> Option<T> + 'async_trait
) -> Pin<Box<dyn Future<Output = Result<T, Error>> + 'async_trait>>where
'life0: 'async_trait,
T: 'async_trait,
I: 'async_trait,
fn proc<'life0, 'async_trait, T>(
&'life0 mut self,
predicate: impl Fn(RuntimeEvent) -> Option<T> + 'async_trait
) -> Pin<Box<dyn Future<Output = Result<T, Error>> + 'async_trait>>where
'life0: 'async_trait,
T: 'async_trait,
I: 'async_trait,
Event processing function. Read more
source§fn proc_many<'life0, 'async_trait, T>(
&'life0 mut self,
predicate: impl Fn(RuntimeEvent) -> Option<T> + 'async_trait,
validate: impl Fn(Vec<T>) -> (Vec<T>, bool) + 'async_trait
) -> Pin<Box<dyn Future<Output = Result<Vec<T>, Error>> + 'async_trait>>where
'life0: 'async_trait,
T: 'async_trait,
I: 'async_trait,
fn proc_many<'life0, 'async_trait, T>(
&'life0 mut self,
predicate: impl Fn(RuntimeEvent) -> Option<T> + 'async_trait,
validate: impl Fn(Vec<T>) -> (Vec<T>, bool) + 'async_trait
) -> Pin<Box<dyn Future<Output = Result<Vec<T>, Error>> + 'async_trait>>where
'life0: 'async_trait,
T: 'async_trait,
I: 'async_trait,
Multiple events processing function. Read more
source§fn message_processed<'life0, 'async_trait>(
&'life0 mut self,
message_id: MessageId
) -> Pin<Box<dyn Future<Output = Result<DispatchStatus>> + 'async_trait>>where
Self: 'async_trait,
'life0: 'async_trait,
fn message_processed<'life0, 'async_trait>(
&'life0 mut self,
message_id: MessageId
) -> Pin<Box<dyn Future<Output = Result<DispatchStatus>> + 'async_trait>>where
Self: 'async_trait,
'life0: 'async_trait,
Check whether the message identified by
message_id
has been processed.source§fn message_processed_batch<'life0, 'async_trait>(
&'life0 mut self,
message_ids: impl 'async_trait + IntoIterator<Item = MessageId>
) -> Pin<Box<dyn Future<Output = Result<Vec<(MessageId, DispatchStatus)>>> + 'async_trait>>where
Self: 'async_trait,
'life0: 'async_trait,
fn message_processed_batch<'life0, 'async_trait>(
&'life0 mut self,
message_ids: impl 'async_trait + IntoIterator<Item = MessageId>
) -> Pin<Box<dyn Future<Output = Result<Vec<(MessageId, DispatchStatus)>>> + 'async_trait>>where
Self: 'async_trait,
'life0: 'async_trait,
Check whether the batch of messages identified by corresponding
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&'life0 mut self,
message_id: MessageId
) -> Pin<Box<dyn Future<Output = Result<(MessageId, Result<Vec<u8>, String>, u128)>> + 'async_trait>>where
Self: 'async_trait,
'life0: 'async_trait,
fn reply_bytes_on<'life0, 'async_trait>(
&'life0 mut self,
message_id: MessageId
) -> Pin<Box<dyn Future<Output = Result<(MessageId, Result<Vec<u8>, String>, u128)>> + 'async_trait>>where
Self: 'async_trait,
'life0: 'async_trait,
Get details of a reply to the message identified by
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. Read moresource§fn err_or_succeed<'life0, 'async_trait>(
&'life0 mut self,
message_id: MessageId
) -> Pin<Box<dyn Future<Output = Result<Option<String>>> + 'async_trait>>where
Self: 'async_trait,
'life0: 'async_trait,
fn err_or_succeed<'life0, 'async_trait>(
&'life0 mut self,
message_id: MessageId
) -> Pin<Box<dyn Future<Output = Result<Option<String>>> + 'async_trait>>where
Self: 'async_trait,
'life0: 'async_trait,
Check whether the processing of a message identified by
message_id
resulted in an error or has been successful. Read moresource§fn err_or_succeed_batch<'life0, 'async_trait>(
&'life0 mut self,
message_ids: impl 'async_trait + IntoIterator<Item = MessageId>
) -> Pin<Box<dyn Future<Output = Result<Vec<(MessageId, Option<String>)>>> + 'async_trait>>where
Self: 'async_trait,
'life0: 'async_trait,
fn err_or_succeed_batch<'life0, 'async_trait>(
&'life0 mut self,
message_ids: impl 'async_trait + IntoIterator<Item = MessageId>
) -> Pin<Box<dyn Future<Output = Result<Vec<(MessageId, Option<String>)>>> + 'async_trait>>where
Self: 'async_trait,
'life0: 'async_trait,
Check whether processing batch of messages identified by corresponding
message_ids
resulted in errors or has been successful. Read more§impl<T> FmtForward for T
impl<T> FmtForward for T
§fn fmt_binary(self) -> FmtBinary<Self>where
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-formatted.§fn fmt_lower_exp(self) -> FmtLowerExp<Self>where
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self
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Debug
-formatted.§fn fmt_lower_hex(self) -> FmtLowerHex<Self>where
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Debug
-formatted.§fn fmt_octal(self) -> FmtOctal<Self>where
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-formatted.§fn fmt_pointer(self) -> FmtPointer<Self>where
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-formatted.§fn fmt_upper_exp(self) -> FmtUpperExp<Self>where
Self: UpperExp,
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Self: UpperExp,
Causes
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implementation when
Debug
-formatted.§fn fmt_upper_hex(self) -> FmtUpperHex<Self>where
Self: UpperHex,
fn fmt_upper_hex(self) -> FmtUpperHex<Self>where
Self: UpperHex,
Causes
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Debug
-formatted.§fn fmt_list(self) -> FmtList<Self>where
&'a Self: for<'a> IntoIterator,
fn fmt_list(self) -> FmtList<Self>where
&'a Self: for<'a> IntoIterator,
Formats each item in a sequence. Read more
§impl<T> FromBits<T> for T
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§impl<T> Instrument for T
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§fn instrument(self, span: Span) -> Instrumented<Self>
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§fn in_current_span(self) -> Instrumented<Self>
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source§impl<I> IntoIterator for Iwhere
I: Iterator,
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