1.0.0[−][src]Struct core::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: IdxThe lower bound of the range (inclusive).
end: IdxThe upper bound of the range (exclusive).
Implementations
impl<Idx: PartialOrd<Idx>> Range<Idx>[src]
pub fn contains<U: ?Sized>(&self, item: &U) -> bool where
Idx: PartialOrd<U>,
U: PartialOrd<Idx>, 1.35.0[src]
Idx: PartialOrd<U>,
U: PartialOrd<Idx>,
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));Run
pub fn is_empty(&self) -> bool[src]
🔬 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)] assert!(!(3.0..5.0).is_empty()); assert!( (3.0..f32::NAN).is_empty()); assert!( (f32::NAN..5.0).is_empty());Run
Trait Implementations
impl<Idx: Clone> Clone for Range<Idx>[src]
fn clone(&self) -> Range<Idx>[src]
fn clone_from(&mut self, source: &Self)[src]
impl<Idx: Debug> Debug for Range<Idx>[src]
impl<A: Step> DoubleEndedIterator for Range<A>[src]
fn next_back(&mut self) -> Option<A>[src]
fn nth_back(&mut self, n: usize) -> Option<A>[src]
fn try_rfold<B, F, R>(&mut self, init: B, f: F) -> R where
Self: Sized,
F: FnMut(B, Self::Item) -> R,
R: Try<Ok = B>, 1.27.0[src]
Self: Sized,
F: FnMut(B, Self::Item) -> R,
R: Try<Ok = B>,
fn rfold<B, F>(self, init: B, f: F) -> B where
Self: Sized,
F: FnMut(B, Self::Item) -> B, 1.27.0[src]
Self: Sized,
F: FnMut(B, Self::Item) -> B,
fn rfind<P>(&mut self, predicate: P) -> Option<Self::Item> where
Self: Sized,
P: FnMut(&Self::Item) -> bool, 1.27.0[src]
Self: Sized,
P: FnMut(&Self::Item) -> bool,
impl<Idx: Eq> Eq for Range<Idx>[src]
impl ExactSizeIterator for Range<usize>[src]
impl ExactSizeIterator for Range<u8>[src]
impl ExactSizeIterator for Range<u16>[src]
impl ExactSizeIterator for Range<isize>[src]
impl ExactSizeIterator for Range<i8>[src]
impl ExactSizeIterator for Range<i16>[src]
impl ExactSizeIterator for Range<u32>[src]
impl ExactSizeIterator for Range<i32>[src]
impl<A: Step> FusedIterator for Range<A>1.26.0[src]
impl<Idx: Hash> Hash for Range<Idx>[src]
fn hash<__H: Hasher>(&self, state: &mut __H)[src]
fn hash_slice<H: Hasher>(data: &[Self], state: &mut H) where
Self: Sized, 1.3.0[src]
Self: Sized,
impl<A: Step> Iterator for Range<A>[src]
type Item = A
The type of the elements being iterated over.
fn next(&mut self) -> Option<A>[src]
fn size_hint(&self) -> (usize, Option<usize>)[src]
fn nth(&mut self, n: usize) -> Option<A>[src]
fn last(self) -> Option<A>[src]
fn min(self) -> Option<A>[src]
fn max(self) -> Option<A>[src]
fn count(self) -> usize where
Self: Sized, [src]
Self: Sized,
fn step_by(self, step: usize) -> StepBy<Self> where
Self: Sized, 1.28.0[src]
Self: Sized,
fn chain<U>(self, other: U) -> Chain<Self, U::IntoIter> where
Self: Sized,
U: IntoIterator<Item = Self::Item>, [src]
Self: Sized,
U: IntoIterator<Item = Self::Item>,
fn zip<U>(self, other: U) -> Zip<Self, U::IntoIter> where
Self: Sized,
U: IntoIterator, [src]
Self: Sized,
U: IntoIterator,
fn map<B, F>(self, f: F) -> Map<Self, F> where
Self: Sized,
F: FnMut(Self::Item) -> B, [src]
Self: Sized,
F: FnMut(Self::Item) -> B,
fn for_each<F>(self, f: F) where
Self: Sized,
F: FnMut(Self::Item), 1.21.0[src]
Self: Sized,
F: FnMut(Self::Item),
fn filter<P>(self, predicate: P) -> Filter<Self, P> where
Self: Sized,
P: FnMut(&Self::Item) -> bool, [src]
Self: Sized,
P: FnMut(&Self::Item) -> bool,
fn filter_map<B, F>(self, f: F) -> FilterMap<Self, F> where
Self: Sized,
F: FnMut(Self::Item) -> Option<B>, [src]
Self: Sized,
F: FnMut(Self::Item) -> Option<B>,
fn enumerate(self) -> Enumerate<Self> where
Self: Sized, [src]
Self: Sized,
fn peekable(self) -> Peekable<Self> where
Self: Sized, [src]
Self: Sized,
fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P> where
Self: Sized,
P: FnMut(&Self::Item) -> bool, [src]
Self: Sized,
P: FnMut(&Self::Item) -> bool,
fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P> where
Self: Sized,
P: FnMut(&Self::Item) -> bool, [src]
Self: Sized,
P: FnMut(&Self::Item) -> bool,
fn map_while<B, P>(self, predicate: P) -> MapWhile<Self, P> where
Self: Sized,
P: FnMut(Self::Item) -> Option<B>, [src]
Self: Sized,
P: FnMut(Self::Item) -> Option<B>,
fn skip(self, n: usize) -> Skip<Self> where
Self: Sized, [src]
Self: Sized,
fn take(self, n: usize) -> Take<Self> where
Self: Sized, [src]
Self: Sized,
fn scan<St, B, F>(self, initial_state: St, f: F) -> Scan<Self, St, F> where
Self: Sized,
F: FnMut(&mut St, Self::Item) -> Option<B>, [src]
Self: Sized,
F: FnMut(&mut St, Self::Item) -> Option<B>,
fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F> where
Self: Sized,
U: IntoIterator,
F: FnMut(Self::Item) -> U, [src]
Self: Sized,
U: IntoIterator,
F: FnMut(Self::Item) -> U,
fn flatten(self) -> Flatten<Self> where
Self: Sized,
Self::Item: IntoIterator, 1.29.0[src]
Self: Sized,
Self::Item: IntoIterator,
fn fuse(self) -> Fuse<Self> where
Self: Sized, [src]
Self: Sized,
fn inspect<F>(self, f: F) -> Inspect<Self, F> where
Self: Sized,
F: FnMut(&Self::Item), [src]
Self: Sized,
F: FnMut(&Self::Item),
fn by_ref(&mut self) -> &mut Self where
Self: Sized, [src]
Self: Sized,
#[must_use =
"if you really need to exhaust the iterator, consider `.for_each(drop)` instead"]fn collect<B: FromIterator<Self::Item>>(self) -> B where
Self: Sized, [src]
Self: Sized,
fn partition<B, F>(self, f: F) -> (B, B) where
Self: Sized,
B: Default + Extend<Self::Item>,
F: FnMut(&Self::Item) -> bool, [src]
Self: Sized,
B: Default + Extend<Self::Item>,
F: FnMut(&Self::Item) -> bool,
fn partition_in_place<'a, T: 'a, P>(self, predicate: P) -> usize where
Self: Sized + DoubleEndedIterator<Item = &'a mut T>,
P: FnMut(&T) -> bool, [src]
Self: Sized + DoubleEndedIterator<Item = &'a mut T>,
P: FnMut(&T) -> bool,
fn is_partitioned<P>(self, predicate: P) -> bool where
Self: Sized,
P: FnMut(Self::Item) -> bool, [src]
Self: Sized,
P: FnMut(Self::Item) -> bool,
fn try_fold<B, F, R>(&mut self, init: B, f: F) -> R where
Self: Sized,
F: FnMut(B, Self::Item) -> R,
R: Try<Ok = B>, 1.27.0[src]
Self: Sized,
F: FnMut(B, Self::Item) -> R,
R: Try<Ok = B>,
fn try_for_each<F, R>(&mut self, f: F) -> R where
Self: Sized,
F: FnMut(Self::Item) -> R,
R: Try<Ok = ()>, 1.27.0[src]
Self: Sized,
F: FnMut(Self::Item) -> R,
R: Try<Ok = ()>,
fn fold<B, F>(self, init: B, f: F) -> B where
Self: Sized,
F: FnMut(B, Self::Item) -> B, [src]
Self: Sized,
F: FnMut(B, Self::Item) -> B,
fn fold_first<F>(self, f: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(Self::Item, Self::Item) -> Self::Item, [src]
Self: Sized,
F: FnMut(Self::Item, Self::Item) -> Self::Item,
fn all<F>(&mut self, f: F) -> bool where
Self: Sized,
F: FnMut(Self::Item) -> bool, [src]
Self: Sized,
F: FnMut(Self::Item) -> bool,
fn any<F>(&mut self, f: F) -> bool where
Self: Sized,
F: FnMut(Self::Item) -> bool, [src]
Self: Sized,
F: FnMut(Self::Item) -> bool,
fn find<P>(&mut self, predicate: P) -> Option<Self::Item> where
Self: Sized,
P: FnMut(&Self::Item) -> bool, [src]
Self: Sized,
P: FnMut(&Self::Item) -> bool,
fn find_map<B, F>(&mut self, f: F) -> Option<B> where
Self: Sized,
F: FnMut(Self::Item) -> Option<B>, 1.30.0[src]
Self: Sized,
F: FnMut(Self::Item) -> Option<B>,
fn try_find<F, E, R>(&mut self, f: F) -> Result<Option<Self::Item>, E> where
Self: Sized,
F: FnMut(&Self::Item) -> R,
R: Try<Ok = bool, Error = E>, [src]
Self: Sized,
F: FnMut(&Self::Item) -> R,
R: Try<Ok = bool, Error = E>,
fn position<P>(&mut self, predicate: P) -> Option<usize> where
Self: Sized,
P: FnMut(Self::Item) -> bool, [src]
Self: Sized,
P: FnMut(Self::Item) -> bool,
fn rposition<P>(&mut self, predicate: P) -> Option<usize> where
P: FnMut(Self::Item) -> bool,
Self: Sized + ExactSizeIterator + DoubleEndedIterator, [src]
P: FnMut(Self::Item) -> bool,
Self: Sized + ExactSizeIterator + DoubleEndedIterator,
fn max_by_key<B: Ord, F>(self, f: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(&Self::Item) -> B, 1.6.0[src]
Self: Sized,
F: FnMut(&Self::Item) -> B,
fn max_by<F>(self, compare: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(&Self::Item, &Self::Item) -> Ordering, 1.15.0[src]
Self: Sized,
F: FnMut(&Self::Item, &Self::Item) -> Ordering,
fn min_by_key<B: Ord, F>(self, f: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(&Self::Item) -> B, 1.6.0[src]
Self: Sized,
F: FnMut(&Self::Item) -> B,
fn min_by<F>(self, compare: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(&Self::Item, &Self::Item) -> Ordering, 1.15.0[src]
Self: Sized,
F: FnMut(&Self::Item, &Self::Item) -> Ordering,
fn rev(self) -> Rev<Self> where
Self: Sized + DoubleEndedIterator, [src]
Self: Sized + DoubleEndedIterator,
fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB) where
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
Self: Sized + Iterator<Item = (A, B)>, [src]
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
Self: Sized + Iterator<Item = (A, B)>,
fn copied<'a, T: 'a>(self) -> Copied<Self> where
Self: Sized + Iterator<Item = &'a T>,
T: Copy, 1.36.0[src]
Self: Sized + Iterator<Item = &'a T>,
T: Copy,
fn cloned<'a, T: 'a>(self) -> Cloned<Self> where
Self: Sized + Iterator<Item = &'a T>,
T: Clone, [src]
Self: Sized + Iterator<Item = &'a T>,
T: Clone,
fn cycle(self) -> Cycle<Self> where
Self: Sized + Clone, [src]
Self: Sized + Clone,
fn sum<S>(self) -> S where
Self: Sized,
S: Sum<Self::Item>, 1.11.0[src]
Self: Sized,
S: Sum<Self::Item>,
fn product<P>(self) -> P where
Self: Sized,
P: Product<Self::Item>, 1.11.0[src]
Self: Sized,
P: Product<Self::Item>,
fn cmp<I>(self, other: I) -> Ordering where
I: IntoIterator<Item = Self::Item>,
Self::Item: Ord,
Self: Sized, 1.5.0[src]
I: IntoIterator<Item = Self::Item>,
Self::Item: Ord,
Self: Sized,
fn cmp_by<I, F>(self, other: I, cmp: F) -> Ordering where
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, I::Item) -> Ordering, [src]
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, I::Item) -> Ordering,
fn partial_cmp<I>(self, other: I) -> Option<Ordering> where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized, 1.5.0[src]
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
fn partial_cmp_by<I, F>(self, other: I, partial_cmp: F) -> Option<Ordering> where
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, I::Item) -> Option<Ordering>, [src]
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, I::Item) -> Option<Ordering>,
fn eq<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialEq<I::Item>,
Self: Sized, 1.5.0[src]
I: IntoIterator,
Self::Item: PartialEq<I::Item>,
Self: Sized,
fn eq_by<I, F>(self, other: I, eq: F) -> bool where
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, I::Item) -> bool, [src]
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, I::Item) -> bool,
fn ne<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialEq<I::Item>,
Self: Sized, 1.5.0[src]
I: IntoIterator,
Self::Item: PartialEq<I::Item>,
Self: Sized,
fn lt<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized, 1.5.0[src]
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
fn le<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized, 1.5.0[src]
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
fn gt<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized, 1.5.0[src]
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
fn ge<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized, 1.5.0[src]
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
fn is_sorted(self) -> bool where
Self: Sized,
Self::Item: PartialOrd, [src]
Self: Sized,
Self::Item: PartialOrd,
fn is_sorted_by<F>(self, compare: F) -> bool where
Self: Sized,
F: FnMut(&Self::Item, &Self::Item) -> Option<Ordering>, [src]
Self: Sized,
F: FnMut(&Self::Item, &Self::Item) -> Option<Ordering>,
fn is_sorted_by_key<F, K>(self, f: F) -> bool where
Self: Sized,
F: FnMut(Self::Item) -> K,
K: PartialOrd, [src]
Self: Sized,
F: FnMut(Self::Item) -> K,
K: PartialOrd,
impl<Idx: PartialEq> PartialEq<Range<Idx>> for Range<Idx>[src]
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: ?Sized>(&self, item: &U) -> bool where
T: PartialOrd<U>,
U: PartialOrd<T>, 1.35.0[src]
T: PartialOrd<U>,
U: PartialOrd<T>,
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: ?Sized>(&self, item: &U) -> bool where
T: PartialOrd<U>,
U: PartialOrd<T>, 1.35.0[src]
T: PartialOrd<U>,
U: PartialOrd<T>,
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]>[src]
fn get_mut(self, slice: &mut [T]) -> Option<&mut [T]>[src]
unsafe fn get_unchecked(self, slice: &[T]) -> &[T][src]
unsafe fn get_unchecked_mut(self, slice: &mut [T]) -> &mut [T][src]
fn index(self, slice: &[T]) -> &[T][src]
fn index_mut(self, slice: &mut [T]) -> &mut [T][src]
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<&Self::Output>[src]
fn get_mut(self, slice: &mut str) -> Option<&mut Self::Output>[src]
unsafe fn get_unchecked(self, slice: &str) -> &Self::Output[src]
unsafe fn get_unchecked_mut(self, slice: &mut str) -> &mut Self::Output[src]
fn index(self, slice: &str) -> &Self::Output[src]
fn index_mut(self, slice: &mut str) -> &mut Self::Output[src]
impl<Idx> StructuralEq for Range<Idx>[src]
impl<Idx> StructuralPartialEq for Range<Idx>[src]
impl<A: Step> TrustedLen for Range<A>[src]
Auto Trait Implementations
impl<Idx> Send for Range<Idx> where
Idx: Send,
Idx: Send,
impl<Idx> Sync for Range<Idx> where
Idx: Sync,
Idx: Sync,
impl<Idx> Unpin for Range<Idx> where
Idx: Unpin,
Idx: Unpin,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized, [src]
T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized, [src]
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized, [src]
T: ?Sized,
fn borrow_mut(&mut Self) -> &mut T[src]
impl<T> From<T> for T[src]
impl<T, U> Into<U> for T where
U: From<T>, [src]
U: From<T>,
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(U) -> Result<T, <T as TryFrom<U>>::Error>[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>, [src]
U: TryFrom<T>,