pub struct Range<Idx> {
pub start: Idx,
pub end: Idx,
}
mtls
only.Expand description
A (half-open) range bounded inclusively below and exclusively above
(start..end
).
The range start..end
contains all values with start <= x < end
.
It is empty if start >= end
.
§Examples
The start..end
syntax is a Range
:
assert_eq!((3..5), std::ops::Range { start: 3, end: 5 });
assert_eq!(3 + 4 + 5, (3..6).sum());
let arr = [0, 1, 2, 3, 4];
assert_eq!(arr[ .. ], [0, 1, 2, 3, 4]);
assert_eq!(arr[ .. 3], [0, 1, 2 ]);
assert_eq!(arr[ ..=3], [0, 1, 2, 3 ]);
assert_eq!(arr[1.. ], [ 1, 2, 3, 4]);
assert_eq!(arr[1.. 3], [ 1, 2 ]); // This is a `Range`
assert_eq!(arr[1..=3], [ 1, 2, 3 ]);
Fields§
§start: Idx
The lower bound of the range (inclusive).
end: Idx
The upper bound of the range (exclusive).
Implementations§
source§impl<Idx> Range<Idx>where
Idx: PartialOrd,
impl<Idx> Range<Idx>where
Idx: PartialOrd,
1.35.0 · sourcepub fn contains<U>(&self, item: &U) -> bool
pub fn contains<U>(&self, item: &U) -> bool
Returns true
if item
is contained in the range.
§Examples
assert!(!(3..5).contains(&2));
assert!( (3..5).contains(&3));
assert!( (3..5).contains(&4));
assert!(!(3..5).contains(&5));
assert!(!(3..3).contains(&3));
assert!(!(3..2).contains(&3));
assert!( (0.0..1.0).contains(&0.5));
assert!(!(0.0..1.0).contains(&f32::NAN));
assert!(!(0.0..f32::NAN).contains(&0.5));
assert!(!(f32::NAN..1.0).contains(&0.5));
1.47.0 · sourcepub fn is_empty(&self) -> bool
pub fn is_empty(&self) -> bool
Returns true
if the range contains no items.
§Examples
assert!(!(3..5).is_empty());
assert!( (3..3).is_empty());
assert!( (3..2).is_empty());
The range is empty if either side is incomparable:
assert!(!(3.0..5.0).is_empty());
assert!( (3.0..f32::NAN).is_empty());
assert!( (f32::NAN..5.0).is_empty());
Trait Implementations§
source§impl<C1, C2> ContainsToken<C1> for Range<C2>
impl<C1, C2> ContainsToken<C1> for Range<C2>
source§fn contains_token(&self, token: C1) -> bool
fn contains_token(&self, token: C1) -> bool
source§impl<'de, Idx> Deserialize<'de> for Range<Idx>where
Idx: Deserialize<'de>,
impl<'de, Idx> Deserialize<'de> for Range<Idx>where
Idx: Deserialize<'de>,
source§fn deserialize<D>(
deserializer: D,
) -> Result<Range<Idx>, <D as Deserializer<'de>>::Error>where
D: Deserializer<'de>,
fn deserialize<D>(
deserializer: D,
) -> Result<Range<Idx>, <D as Deserializer<'de>>::Error>where
D: Deserializer<'de>,
1.0.0 · source§impl<A> DoubleEndedIterator for Range<A>where
A: Step,
impl<A> DoubleEndedIterator for Range<A>where
A: Step,
source§fn next_back(&mut self) -> Option<A>
fn next_back(&mut self) -> Option<A>
source§fn nth_back(&mut self, n: usize) -> Option<A>
fn nth_back(&mut self, n: usize) -> Option<A>
n
th element from the end of the iterator. Read moresource§fn advance_back_by(&mut self, n: usize) -> Result<(), NonZero<usize>>
fn advance_back_by(&mut self, n: usize) -> Result<(), NonZero<usize>>
iter_advance_by
)n
elements. Read more1.27.0 · source§fn try_rfold<B, F, R>(&mut self, init: B, f: F) -> R
fn try_rfold<B, F, R>(&mut self, init: B, f: F) -> R
Iterator::try_fold()
: it takes
elements starting from the back of the iterator. Read more1.0.0 · source§impl ExactSizeIterator for Range<i16>
impl ExactSizeIterator for Range<i16>
1.0.0 · source§impl ExactSizeIterator for Range<i32>
impl ExactSizeIterator for Range<i32>
1.0.0 · source§impl ExactSizeIterator for Range<i8>
impl ExactSizeIterator for Range<i8>
1.0.0 · source§impl ExactSizeIterator for Range<isize>
impl ExactSizeIterator for Range<isize>
1.0.0 · source§impl ExactSizeIterator for Range<u16>
impl ExactSizeIterator for Range<u16>
1.0.0 · source§impl ExactSizeIterator for Range<u32>
impl ExactSizeIterator for Range<u32>
1.0.0 · source§impl ExactSizeIterator for Range<u8>
impl ExactSizeIterator for Range<u8>
1.0.0 · source§impl ExactSizeIterator for Range<usize>
impl ExactSizeIterator for Range<usize>
source§impl<'v, T: Send> FromForm<'v> for Range<T>where
Range<T>: FromForm<'v>,
impl<'v, T: Send> FromForm<'v> for Range<T>where
Range<T>: FromForm<'v>,
source§fn push_value(ctxt: &mut Self::Context, field: ValueField<'v>)
fn push_value(ctxt: &mut Self::Context, field: ValueField<'v>)
field
.source§fn push_data<'life0, 'life1, 'async_trait>(
ctxt: &'life0 mut Self::Context,
field: DataField<'v, 'life1>,
) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>where
Self: 'async_trait,
'v: 'async_trait,
'life0: 'async_trait,
'life1: 'async_trait,
fn push_data<'life0, 'life1, 'async_trait>(
ctxt: &'life0 mut Self::Context,
field: DataField<'v, 'life1>,
) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>where
Self: 'async_trait,
'v: 'async_trait,
'life0: 'async_trait,
'life1: 'async_trait,
field
.source§fn finalize(this: Self::Context) -> Result<'v, Self>
fn finalize(this: Self::Context) -> Result<'v, Self>
Errors
otherwise.1.0.0 · source§impl<A> Iterator for Range<A>where
A: Step,
impl<A> Iterator for Range<A>where
A: Step,
source§fn size_hint(&self) -> (usize, Option<usize>)
fn size_hint(&self) -> (usize, Option<usize>)
source§fn count(self) -> usize
fn count(self) -> usize
source§fn advance_by(&mut self, n: usize) -> Result<(), NonZero<usize>>
fn advance_by(&mut self, n: usize) -> Result<(), NonZero<usize>>
iter_advance_by
)n
elements. Read moresource§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,
iter_next_chunk
)N
values. 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,
1.0.0 · 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> ⓘ
1.0.0 · 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,
source§fn intersperse_with<G>(self, separator: G) -> IntersperseWith<Self, G> ⓘ
fn intersperse_with<G>(self, separator: G) -> IntersperseWith<Self, G> ⓘ
iter_intersperse
)separator
between adjacent items of the original iterator. Read more1.0.0 · source§fn map<B, F>(self, f: F) -> Map<Self, F> ⓘ
fn map<B, F>(self, f: F) -> Map<Self, F> ⓘ
1.0.0 · source§fn filter<P>(self, predicate: P) -> Filter<Self, P> ⓘ
fn filter<P>(self, predicate: P) -> Filter<Self, P> ⓘ
1.0.0 · source§fn filter_map<B, F>(self, f: F) -> FilterMap<Self, F> ⓘ
fn filter_map<B, F>(self, f: F) -> FilterMap<Self, F> ⓘ
1.0.0 · source§fn enumerate(self) -> Enumerate<Self> ⓘwhere
Self: Sized,
fn enumerate(self) -> Enumerate<Self> ⓘwhere
Self: Sized,
1.0.0 · source§fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P> ⓘ
fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P> ⓘ
1.0.0 · source§fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P> ⓘ
fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P> ⓘ
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> ⓘ
1.0.0 · source§fn skip(self, n: usize) -> Skip<Self> ⓘwhere
Self: Sized,
fn skip(self, n: usize) -> Skip<Self> ⓘwhere
Self: Sized,
n
elements. Read more1.0.0 · source§fn take(self, n: usize) -> Take<Self> ⓘwhere
Self: Sized,
fn take(self, n: usize) -> Take<Self> ⓘwhere
Self: Sized,
n
elements, or fewer
if the underlying iterator ends sooner. Read more1.0.0 · source§fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F> ⓘ
fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F> ⓘ
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> ⓘ
iter_map_windows
)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 more1.0.0 · source§fn inspect<F>(self, f: F) -> Inspect<Self, F> ⓘ
fn inspect<F>(self, f: F) -> Inspect<Self, F> ⓘ
1.0.0 · source§fn by_ref(&mut self) -> &mut Selfwhere
Self: Sized,
fn by_ref(&mut self) -> &mut Selfwhere
Self: Sized,
source§fn collect_into<E>(self, collection: &mut E) -> &mut E
fn collect_into<E>(self, collection: &mut E) -> &mut E
iter_collect_into
)1.0.0 · source§fn partition<B, F>(self, f: F) -> (B, B)
fn partition<B, F>(self, f: F) -> (B, B)
source§fn partition_in_place<'a, T, P>(self, predicate: P) -> usize
fn partition_in_place<'a, T, P>(self, predicate: P) -> usize
iter_partition_in_place
)true
precede all those that return false
.
Returns the number of true
elements found. Read moresource§fn is_partitioned<P>(self, predicate: P) -> bool
fn is_partitioned<P>(self, predicate: P) -> bool
iter_is_partitioned
)true
precede all those that return false
. Read more1.27.0 · source§fn try_fold<B, F, R>(&mut self, init: B, f: F) -> R
fn try_fold<B, F, R>(&mut self, init: B, f: F) -> R
1.27.0 · source§fn try_for_each<F, R>(&mut self, f: F) -> R
fn try_for_each<F, R>(&mut self, f: F) -> R
1.0.0 · source§fn fold<B, F>(self, init: B, f: F) -> B
fn fold<B, F>(self, init: B, f: F) -> B
1.51.0 · source§fn reduce<F>(self, f: F) -> Option<Self::Item>
fn reduce<F>(self, f: F) -> Option<Self::Item>
source§fn try_reduce<R>(
&mut self,
f: impl FnMut(Self::Item, Self::Item) -> R,
) -> <<R as Try>::Residual as Residual<Option<<R as Try>::Output>>>::TryType
fn try_reduce<R>( &mut self, f: impl FnMut(Self::Item, Self::Item) -> R, ) -> <<R as Try>::Residual as Residual<Option<<R as Try>::Output>>>::TryType
iterator_try_reduce
)1.0.0 · source§fn all<F>(&mut self, f: F) -> bool
fn all<F>(&mut self, f: F) -> bool
1.0.0 · source§fn any<F>(&mut self, f: F) -> bool
fn any<F>(&mut self, f: F) -> bool
1.0.0 · source§fn find<P>(&mut self, predicate: P) -> Option<Self::Item>
fn find<P>(&mut self, predicate: P) -> Option<Self::Item>
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>
source§fn try_find<R>(
&mut self,
f: impl FnMut(&Self::Item) -> R,
) -> <<R as Try>::Residual as Residual<Option<Self::Item>>>::TryType
fn try_find<R>( &mut self, f: impl FnMut(&Self::Item) -> R, ) -> <<R as Try>::Residual as Residual<Option<Self::Item>>>::TryType
try_find
)1.0.0 · source§fn position<P>(&mut self, predicate: P) -> Option<usize>
fn position<P>(&mut self, predicate: P) -> Option<usize>
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>
1.15.0 · source§fn max_by<F>(self, compare: F) -> Option<Self::Item>
fn max_by<F>(self, compare: F) -> Option<Self::Item>
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>
1.15.0 · source§fn min_by<F>(self, compare: F) -> Option<Self::Item>
fn min_by<F>(self, compare: F) -> Option<Self::Item>
1.0.0 · source§fn rev(self) -> Rev<Self> ⓘwhere
Self: Sized + DoubleEndedIterator,
fn rev(self) -> Rev<Self> ⓘwhere
Self: Sized + DoubleEndedIterator,
1.0.0 · source§fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB)
fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB)
1.36.0 · source§fn copied<'a, T>(self) -> Copied<Self> ⓘ
fn copied<'a, T>(self) -> Copied<Self> ⓘ
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,
iter_array_chunks
)N
elements of the iterator at a time. Read more1.11.0 · source§fn product<P>(self) -> P
fn product<P>(self) -> P
source§fn cmp_by<I, F>(self, other: I, cmp: F) -> Ordering
fn cmp_by<I, F>(self, other: I, cmp: F) -> Ordering
iter_order_by
)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>
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>,
iter_order_by
)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
iter_order_by
)1.5.0 · source§fn lt<I>(self, other: I) -> bool
fn lt<I>(self, other: I) -> bool
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
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
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
Iterator
are lexicographically
greater than or equal to those of another. Read more1.83.0 · source§fn is_sorted_by<F>(self, compare: F) -> bool
fn is_sorted_by<F>(self, compare: F) -> bool
1.83.0 · source§fn is_sorted_by_key<F, K>(self, f: F) -> bool
fn is_sorted_by_key<F, K>(self, f: F) -> bool
1.28.0 · source§impl<T> RangeBounds<T> for Range<&T>
impl<T> RangeBounds<T> for Range<&T>
1.28.0 · source§impl<T> RangeBounds<T> for Range<T>
impl<T> RangeBounds<T> for Range<T>
source§impl<T> SampleRange<T> for Range<T>where
T: SampleUniform + PartialOrd,
impl<T> SampleRange<T> for Range<T>where
T: SampleUniform + PartialOrd,
source§impl<Idx> Serialize for Range<Idx>where
Idx: Serialize,
impl<Idx> Serialize for Range<Idx>where
Idx: Serialize,
source§fn serialize<S>(
&self,
serializer: S,
) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>where
S: Serializer,
fn serialize<S>(
&self,
serializer: S,
) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>where
S: Serializer,
1.15.0 (const: unstable) · source§impl<T> SliceIndex<[T]> for Range<usize>
impl<T> SliceIndex<[T]> for Range<usize>
The methods index
and index_mut
panic if:
- the start of the range is greater than the end of the range or
- the end of the range is out of bounds.
source§fn get(self, slice: &[T]) -> Option<&[T]>
fn get(self, slice: &[T]) -> Option<&[T]>
slice_index_methods
)source§fn get_mut(self, slice: &mut [T]) -> Option<&mut [T]>
fn get_mut(self, slice: &mut [T]) -> Option<&mut [T]>
slice_index_methods
)source§unsafe fn get_unchecked(self, slice: *const [T]) -> *const [T]
unsafe fn get_unchecked(self, slice: *const [T]) -> *const [T]
slice_index_methods
)source§unsafe fn get_unchecked_mut(self, slice: *mut [T]) -> *mut [T]
unsafe fn get_unchecked_mut(self, slice: *mut [T]) -> *mut [T]
slice_index_methods
)1.20.0 (const: unstable) · source§impl SliceIndex<str> for Range<usize>
impl SliceIndex<str> for Range<usize>
Implements substring slicing with syntax &self[begin .. end]
or &mut self[begin .. end]
.
Returns a slice of the given string from the byte range
[begin
, end
).
This operation is O(1).
Prior to 1.20.0, these indexing operations were still supported by
direct implementation of Index
and IndexMut
.
§Panics
Panics if begin
or end
does not point to the starting byte offset of
a character (as defined by is_char_boundary
), if begin > end
, or if
end > len
.
§Examples
let s = "Löwe 老虎 Léopard";
assert_eq!(&s[0 .. 1], "L");
assert_eq!(&s[1 .. 9], "öwe 老");
// these will panic:
// byte 2 lies within `ö`:
// &s[2 ..3];
// byte 8 lies within `老`
// &s[1 .. 8];
// byte 100 is outside the string
// &s[3 .. 100];
source§fn get(self, slice: &str) -> Option<&<Range<usize> as SliceIndex<str>>::Output>
fn get(self, slice: &str) -> Option<&<Range<usize> as SliceIndex<str>>::Output>
slice_index_methods
)source§fn get_mut(
self,
slice: &mut str,
) -> Option<&mut <Range<usize> as SliceIndex<str>>::Output>
fn get_mut( self, slice: &mut str, ) -> Option<&mut <Range<usize> as SliceIndex<str>>::Output>
slice_index_methods
)source§unsafe fn get_unchecked(
self,
slice: *const str,
) -> *const <Range<usize> as SliceIndex<str>>::Output
unsafe fn get_unchecked( self, slice: *const str, ) -> *const <Range<usize> as SliceIndex<str>>::Output
slice_index_methods
)source§unsafe fn get_unchecked_mut(
self,
slice: *mut str,
) -> *mut <Range<usize> as SliceIndex<str>>::Output
unsafe fn get_unchecked_mut( self, slice: *mut str, ) -> *mut <Range<usize> as SliceIndex<str>>::Output
slice_index_methods
)impl<Idx> Eq for Range<Idx>where
Idx: Eq,
impl<A> FusedIterator for Range<A>where
A: Step,
impl<Idx> StructuralPartialEq for Range<Idx>
impl<A> TrustedLen for Range<A>where
A: TrustedStep,
Auto Trait Implementations§
impl<Idx> Freeze for Range<Idx>where
Idx: Freeze,
impl<Idx> RefUnwindSafe for Range<Idx>where
Idx: RefUnwindSafe,
impl<Idx> Send for Range<Idx>where
Idx: Send,
impl<Idx> Sync for Range<Idx>where
Idx: Sync,
impl<Idx> Unpin for Range<Idx>where
Idx: Unpin,
impl<Idx> UnwindSafe for Range<Idx>where
Idx: UnwindSafe,
Blanket Implementations§
source§impl<'a, T> AsTaggedExplicit<'a> for Twhere
T: 'a,
impl<'a, T> AsTaggedExplicit<'a> for Twhere
T: 'a,
source§impl<'a, T> AsTaggedImplicit<'a> for Twhere
T: 'a,
impl<'a, T> AsTaggedImplicit<'a> for Twhere
T: 'a,
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
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self> ⓘ
fn instrument(self, span: Span) -> Instrumented<Self> ⓘ
source§fn in_current_span(self) -> Instrumented<Self> ⓘ
fn in_current_span(self) -> Instrumented<Self> ⓘ
§impl<T> IntoCollection<T> for T
impl<T> IntoCollection<T> for T
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ
fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§impl<I> IntoIterator for Iwhere
I: Iterator,
impl<I> IntoIterator for Iwhere
I: Iterator,
source§impl<I> IteratorRandom for Iwhere
I: Iterator,
impl<I> IteratorRandom for Iwhere
I: Iterator,
source§fn choose<R>(self, rng: &mut R) -> Option<Self::Item>
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