1.0.0[−][src]Struct std::ops::Range
A (half-open) range bounded inclusively below and exclusively above
(start..end
).
The Range
start..end
contains all values with x >= start
and
x < end
. It is empty unless start < end
.
Examples
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 ]); // Range assert_eq!(arr[1..=3], [ 1,2,3 ]);Run
Fields
start: Idx
The lower bound of the range (inclusive).
end: Idx
The upper bound of the range (exclusive).
Methods
impl<Idx> Range<Idx> where
Idx: PartialOrd<Idx>,
[src]
Idx: PartialOrd<Idx>,
pub fn contains<U>(&self, item: &U) -> bool where
Idx: PartialOrd<U>,
U: PartialOrd<Idx> + ?Sized,
1.35.0[src]
Idx: PartialOrd<U>,
U: PartialOrd<Idx> + ?Sized,
Returns true
if item
is contained in the range.
Examples
use std::f32; 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));Run
pub fn is_empty(&self) -> bool
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🔬 This is a nightly-only experimental API. (range_is_empty
#48111)
recently added
Returns true
if the range contains no items.
Examples
#![feature(range_is_empty)] assert!(!(3..5).is_empty()); assert!( (3..3).is_empty()); assert!( (3..2).is_empty());Run
The range is empty if either side is incomparable:
#![feature(range_is_empty)] use std::f32::NAN; assert!(!(3.0..5.0).is_empty()); assert!( (3.0..NAN).is_empty()); assert!( (NAN..5.0).is_empty());Run
Trait Implementations
impl<A> DoubleEndedIterator for Range<A> where
A: Step,
[src]
A: Step,
fn next_back(&mut self) -> Option<A>
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fn nth_back(&mut self, n: usize) -> Option<A>
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fn try_rfold<B, F, R>(&mut self, init: B, f: F) -> R where
F: FnMut(B, Self::Item) -> R,
R: Try<Ok = B>,
1.27.0[src]
F: FnMut(B, Self::Item) -> R,
R: Try<Ok = B>,
fn rfold<B, F>(self, accum: B, f: F) -> B where
F: FnMut(B, Self::Item) -> B,
1.27.0[src]
F: FnMut(B, Self::Item) -> B,
fn rfind<P>(&mut self, predicate: P) -> Option<Self::Item> where
P: FnMut(&Self::Item) -> bool,
1.27.0[src]
P: FnMut(&Self::Item) -> bool,
impl<Idx> Debug for Range<Idx> where
Idx: Debug,
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Idx: Debug,
impl<T> SliceIndex<[T]> for Range<usize>
1.15.0[src]
type Output = [T]
The output type returned by methods.
fn get(self, slice: &[T]) -> Option<&[T]>
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fn get_mut(self, slice: &mut [T]) -> Option<&mut [T]>
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unsafe fn get_unchecked(self, slice: &[T]) -> &[T]
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unsafe fn get_unchecked_mut(self, slice: &mut [T]) -> &mut [T]
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fn index(self, slice: &[T]) -> &[T]
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fn index_mut(self, slice: &mut [T]) -> &mut [T]
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impl SliceIndex<str> for Range<usize>
1.20.0[src]
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];Run
type Output = str
The output type returned by methods.
fn get(self, slice: &str) -> Option<&<Range<usize> as SliceIndex<str>>::Output>
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fn get_mut(
self,
slice: &mut str
) -> Option<&mut <Range<usize> as SliceIndex<str>>::Output>
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self,
slice: &mut str
) -> Option<&mut <Range<usize> as SliceIndex<str>>::Output>
ⓘImportant traits for Range<A>unsafe fn get_unchecked(
self,
slice: &str
) -> &<Range<usize> as SliceIndex<str>>::Output
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self,
slice: &str
) -> &<Range<usize> as SliceIndex<str>>::Output
ⓘImportant traits for Range<A>unsafe fn get_unchecked_mut(
self,
slice: &mut str
) -> &mut <Range<usize> as SliceIndex<str>>::Output
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self,
slice: &mut str
) -> &mut <Range<usize> as SliceIndex<str>>::Output
ⓘImportant traits for Range<A>fn index(self, slice: &str) -> &<Range<usize> as SliceIndex<str>>::Output
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ⓘImportant traits for Range<A>fn index_mut(
self,
slice: &mut str
) -> &mut <Range<usize> as SliceIndex<str>>::Output
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self,
slice: &mut str
) -> &mut <Range<usize> as SliceIndex<str>>::Output
impl<Idx> Hash for Range<Idx> where
Idx: Hash,
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Idx: Hash,
fn hash<__H>(&self, state: &mut __H) where
__H: Hasher,
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__H: Hasher,
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
H: Hasher,
impl<Idx> Eq for Range<Idx> where
Idx: Eq,
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Idx: Eq,
impl<A> FusedIterator for Range<A> where
A: Step,
1.26.0[src]
A: Step,
impl<Idx> Clone for Range<Idx> where
Idx: Clone,
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Idx: Clone,
ⓘImportant traits for Range<A>fn clone(&self) -> Range<Idx>
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fn clone_from(&mut self, source: &Self)
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impl<Idx> PartialEq<Range<Idx>> for Range<Idx> where
Idx: PartialEq<Idx>,
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Idx: PartialEq<Idx>,
impl ExactSizeIterator for Range<u16>
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impl ExactSizeIterator for Range<isize>
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impl ExactSizeIterator for Range<i16>
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impl ExactSizeIterator for Range<u32>
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impl ExactSizeIterator for Range<usize>
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impl ExactSizeIterator for Range<u8>
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impl ExactSizeIterator for Range<i8>
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impl ExactSizeIterator for Range<i32>
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impl<A> Iterator for Range<A> where
A: Step,
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A: Step,
type Item = A
The type of the elements being iterated over.
fn next(&mut self) -> Option<A>
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fn size_hint(&self) -> (usize, Option<usize>)
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fn nth(&mut self, n: usize) -> Option<A>
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fn last(self) -> Option<A>
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fn min(self) -> Option<A>
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fn max(self) -> Option<A>
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fn count(self) -> usize
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ⓘImportant traits for StepBy<I>fn step_by(self, step: usize) -> StepBy<Self>
1.28.0[src]
ⓘImportant traits for Chain<A, B>fn chain<U>(self, other: U) -> Chain<Self, <U as IntoIterator>::IntoIter> where
U: IntoIterator<Item = Self::Item>,
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U: IntoIterator<Item = Self::Item>,
ⓘImportant traits for Zip<A, B>fn zip<U>(self, other: U) -> Zip<Self, <U as IntoIterator>::IntoIter> where
U: IntoIterator,
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U: IntoIterator,
ⓘImportant traits for Map<I, F>fn map<B, F>(self, f: F) -> Map<Self, F> where
F: FnMut(Self::Item) -> B,
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F: FnMut(Self::Item) -> B,
fn for_each<F>(self, f: F) where
F: FnMut(Self::Item),
1.21.0[src]
F: FnMut(Self::Item),
ⓘImportant traits for Filter<I, P>fn filter<P>(self, predicate: P) -> Filter<Self, P> where
P: FnMut(&Self::Item) -> bool,
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P: FnMut(&Self::Item) -> bool,
ⓘImportant traits for FilterMap<I, F>fn filter_map<B, F>(self, f: F) -> FilterMap<Self, F> where
F: FnMut(Self::Item) -> Option<B>,
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F: FnMut(Self::Item) -> Option<B>,
ⓘImportant traits for Enumerate<I>fn enumerate(self) -> Enumerate<Self>
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ⓘImportant traits for Peekable<I>fn peekable(self) -> Peekable<Self>
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ⓘImportant traits for SkipWhile<I, P>fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P> where
P: FnMut(&Self::Item) -> bool,
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P: FnMut(&Self::Item) -> bool,
ⓘImportant traits for TakeWhile<I, P>fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P> where
P: FnMut(&Self::Item) -> bool,
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P: FnMut(&Self::Item) -> bool,
ⓘImportant traits for Skip<I>fn skip(self, n: usize) -> Skip<Self>
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ⓘImportant traits for Take<I>fn take(self, n: usize) -> Take<Self>
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ⓘImportant traits for Scan<I, St, F>fn scan<St, B, F>(self, initial_state: St, f: F) -> Scan<Self, St, F> where
F: FnMut(&mut St, Self::Item) -> Option<B>,
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F: FnMut(&mut St, Self::Item) -> Option<B>,
ⓘImportant traits for FlatMap<I, U, F>fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F> where
F: FnMut(Self::Item) -> U,
U: IntoIterator,
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F: FnMut(Self::Item) -> U,
U: IntoIterator,
ⓘImportant traits for Flatten<I>fn flatten(self) -> Flatten<Self> where
Self::Item: IntoIterator,
1.29.0[src]
Self::Item: IntoIterator,
ⓘImportant traits for Fuse<I>fn fuse(self) -> Fuse<Self>
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ⓘImportant traits for Inspect<I, F>fn inspect<F>(self, f: F) -> Inspect<Self, F> where
F: FnMut(&Self::Item),
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F: FnMut(&Self::Item),
ⓘImportant traits for &'_ mut Ffn by_ref(&mut self) -> &mut Self
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#[must_use = "if you really need to exhaust the iterator, consider `.for_each(drop)` instead"]
fn collect<B>(self) -> B where
B: FromIterator<Self::Item>,
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B: FromIterator<Self::Item>,
fn partition<B, F>(self, f: F) -> (B, B) where
B: Default + Extend<Self::Item>,
F: FnMut(&Self::Item) -> bool,
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B: Default + Extend<Self::Item>,
F: FnMut(&Self::Item) -> bool,
fn partition_in_place<'a, T, P>(self, predicate: P) -> usize where
P: FnMut(&T) -> bool,
Self: DoubleEndedIterator<Item = &'a mut T>,
T: 'a,
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P: FnMut(&T) -> bool,
Self: DoubleEndedIterator<Item = &'a mut T>,
T: 'a,
fn is_partitioned<P>(self, predicate: P) -> bool where
P: FnMut(Self::Item) -> bool,
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P: FnMut(Self::Item) -> bool,
fn try_fold<B, F, R>(&mut self, init: B, f: F) -> R where
F: FnMut(B, Self::Item) -> R,
R: Try<Ok = B>,
1.27.0[src]
F: FnMut(B, Self::Item) -> R,
R: Try<Ok = B>,
fn try_for_each<F, R>(&mut self, f: F) -> R where
F: FnMut(Self::Item) -> R,
R: Try<Ok = ()>,
1.27.0[src]
F: FnMut(Self::Item) -> R,
R: Try<Ok = ()>,
fn fold<B, F>(self, init: B, f: F) -> B where
F: FnMut(B, Self::Item) -> B,
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F: FnMut(B, Self::Item) -> B,
fn all<F>(&mut self, f: F) -> bool where
F: FnMut(Self::Item) -> bool,
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F: FnMut(Self::Item) -> bool,
fn any<F>(&mut self, f: F) -> bool where
F: FnMut(Self::Item) -> bool,
[src]
F: FnMut(Self::Item) -> bool,
fn find<P>(&mut self, predicate: P) -> Option<Self::Item> where
P: FnMut(&Self::Item) -> bool,
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P: FnMut(&Self::Item) -> bool,
fn find_map<B, F>(&mut self, f: F) -> Option<B> where
F: FnMut(Self::Item) -> Option<B>,
1.30.0[src]
F: FnMut(Self::Item) -> Option<B>,
fn position<P>(&mut self, predicate: P) -> Option<usize> where
P: FnMut(Self::Item) -> bool,
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P: FnMut(Self::Item) -> bool,
fn rposition<P>(&mut self, predicate: P) -> Option<usize> where
P: FnMut(Self::Item) -> bool,
Self: ExactSizeIterator + DoubleEndedIterator,
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P: FnMut(Self::Item) -> bool,
Self: ExactSizeIterator + DoubleEndedIterator,
fn max_by_key<B, F>(self, f: F) -> Option<Self::Item> where
B: Ord,
F: FnMut(&Self::Item) -> B,
1.6.0[src]
B: Ord,
F: FnMut(&Self::Item) -> B,
fn max_by<F>(self, compare: F) -> Option<Self::Item> where
F: FnMut(&Self::Item, &Self::Item) -> Ordering,
1.15.0[src]
F: FnMut(&Self::Item, &Self::Item) -> Ordering,
fn min_by_key<B, F>(self, f: F) -> Option<Self::Item> where
B: Ord,
F: FnMut(&Self::Item) -> B,
1.6.0[src]
B: Ord,
F: FnMut(&Self::Item) -> B,
fn min_by<F>(self, compare: F) -> Option<Self::Item> where
F: FnMut(&Self::Item, &Self::Item) -> Ordering,
1.15.0[src]
F: FnMut(&Self::Item, &Self::Item) -> Ordering,
ⓘImportant traits for Rev<I>fn rev(self) -> Rev<Self> where
Self: DoubleEndedIterator,
[src]
Self: DoubleEndedIterator,
fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB) where
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
Self: Iterator<Item = (A, B)>,
[src]
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
Self: Iterator<Item = (A, B)>,
ⓘImportant traits for Copied<I>fn copied<'a, T>(self) -> Copied<Self> where
Self: Iterator<Item = &'a T>,
T: 'a + Copy,
1.36.0[src]
Self: Iterator<Item = &'a T>,
T: 'a + Copy,
ⓘImportant traits for Cloned<I>fn cloned<'a, T>(self) -> Cloned<Self> where
Self: Iterator<Item = &'a T>,
T: 'a + Clone,
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Self: Iterator<Item = &'a T>,
T: 'a + Clone,
ⓘImportant traits for Cycle<I>fn cycle(self) -> Cycle<Self> where
Self: Clone,
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Self: Clone,
fn sum<S>(self) -> S where
S: Sum<Self::Item>,
1.11.0[src]
S: Sum<Self::Item>,
fn product<P>(self) -> P where
P: Product<Self::Item>,
1.11.0[src]
P: Product<Self::Item>,
fn cmp<I>(self, other: I) -> Ordering where
I: IntoIterator<Item = Self::Item>,
Self::Item: Ord,
1.5.0[src]
I: IntoIterator<Item = Self::Item>,
Self::Item: Ord,
fn cmp_by<I, F>(self, other: I, cmp: F) -> Ordering where
F: FnMut(Self::Item, <I as IntoIterator>::Item) -> Ordering,
I: IntoIterator,
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F: FnMut(Self::Item, <I as IntoIterator>::Item) -> Ordering,
I: IntoIterator,
fn partial_cmp<I>(self, other: I) -> Option<Ordering> where
I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
1.5.0[src]
I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
fn partial_cmp_by<I, F>(self, other: I, partial_cmp: F) -> Option<Ordering> where
F: FnMut(Self::Item, <I as IntoIterator>::Item) -> Option<Ordering>,
I: IntoIterator,
[src]
F: FnMut(Self::Item, <I as IntoIterator>::Item) -> Option<Ordering>,
I: IntoIterator,
fn eq<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialEq<<I as IntoIterator>::Item>,
1.5.0[src]
I: IntoIterator,
Self::Item: PartialEq<<I as IntoIterator>::Item>,
fn eq_by<I, F>(self, other: I, eq: F) -> bool where
F: FnMut(Self::Item, <I as IntoIterator>::Item) -> bool,
I: IntoIterator,
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F: FnMut(Self::Item, <I as IntoIterator>::Item) -> bool,
I: IntoIterator,
fn ne<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialEq<<I as IntoIterator>::Item>,
1.5.0[src]
I: IntoIterator,
Self::Item: PartialEq<<I as IntoIterator>::Item>,
fn lt<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
1.5.0[src]
I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
fn le<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
1.5.0[src]
I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
fn gt<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
1.5.0[src]
I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
fn ge<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
1.5.0[src]
I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
fn is_sorted(self) -> bool where
Self::Item: PartialOrd<Self::Item>,
[src]
Self::Item: PartialOrd<Self::Item>,
fn is_sorted_by<F>(self, compare: F) -> bool where
F: FnMut(&Self::Item, &Self::Item) -> Option<Ordering>,
[src]
F: FnMut(&Self::Item, &Self::Item) -> Option<Ordering>,
fn is_sorted_by_key<F, K>(self, f: F) -> bool where
F: FnMut(Self::Item) -> K,
K: PartialOrd<K>,
[src]
F: FnMut(Self::Item) -> K,
K: PartialOrd<K>,
impl<'_, T> RangeBounds<T> for Range<&'_ T>
1.28.0[src]
fn start_bound(&self) -> Bound<&T>
[src]
fn end_bound(&self) -> Bound<&T>
[src]
fn contains<U>(&self, item: &U) -> bool where
T: PartialOrd<U>,
U: PartialOrd<T> + ?Sized,
1.35.0[src]
T: PartialOrd<U>,
U: PartialOrd<T> + ?Sized,
impl<T> RangeBounds<T> for Range<T>
1.28.0[src]
fn start_bound(&self) -> Bound<&T>
[src]
fn end_bound(&self) -> Bound<&T>
[src]
fn contains<U>(&self, item: &U) -> bool where
T: PartialOrd<U>,
U: PartialOrd<T> + ?Sized,
1.35.0[src]
T: PartialOrd<U>,
U: PartialOrd<T> + ?Sized,
impl TrustedLen for Range<u64>
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impl TrustedLen for Range<usize>
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impl TrustedLen for Range<i8>
[src]
impl TrustedLen for Range<i64>
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impl TrustedLen for Range<u16>
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impl TrustedLen for Range<i128>
[src]
impl TrustedLen for Range<i16>
[src]
impl TrustedLen for Range<i32>
[src]
impl TrustedLen for Range<u128>
[src]
impl TrustedLen for Range<u32>
[src]
impl TrustedLen for Range<u8>
[src]
impl TrustedLen for Range<isize>
[src]
impl IndexMut<Range<usize>> for String
1.3.0[src]
impl Index<Range<usize>> for String
[src]
Auto Trait Implementations
impl<Idx> UnwindSafe for Range<Idx> where
Idx: UnwindSafe,
Idx: UnwindSafe,
impl<Idx> RefUnwindSafe for Range<Idx> where
Idx: RefUnwindSafe,
Idx: RefUnwindSafe,
impl<Idx> Unpin for Range<Idx> where
Idx: Unpin,
Idx: Unpin,
impl<Idx> Send for Range<Idx> where
Idx: Send,
Idx: Send,
impl<Idx> Sync for Range<Idx> where
Idx: Sync,
Idx: Sync,
Blanket Implementations
impl<T> From<T> for T
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
[src]
U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
[src]
impl<T, U> Into<U> for T where
U: From<T>,
[src]
U: From<T>,
impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
[src]
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
[src]
impl<I> IntoIterator for I where
I: Iterator,
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I: Iterator,
type Item = <I as Iterator>::Item
The type of the elements being iterated over.
type IntoIter = I
Which kind of iterator are we turning this into?
fn into_iter(self) -> I
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impl<T> Borrow<T> for T where
T: ?Sized,
[src]
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]
T: ?Sized,
ⓘImportant traits for &'_ mut Ffn borrow_mut(&mut self) -> &mut T
[src]
impl<T> Any for T where
T: 'static + ?Sized,
[src]
T: 'static + ?Sized,
impl<T> ToOwned for T where
T: Clone,
[src]
T: Clone,