Struct core::ops::RangeFrom 1.0.0
[−]
[src]
pub struct RangeFrom<Idx> { pub start: Idx, }
A range which is only bounded below: { x | start <= x }.
Use start..
for its shorthand.
See the contains
method for its characterization.
Note: Currently, no overflow checking is done for the iterator implementation; if you use an integer range and the integer overflows, it might panic in debug mode or create an endless loop in release mode. This overflow behavior might change in the future.
Examples
fn main() { assert_eq!((2..), std::ops::RangeFrom{ start: 2 }); assert_eq!(2+3+4, (2..).take(3).sum()); let arr = [0, 1, 2, 3]; assert_eq!(arr[ .. ], [0,1,2,3]); assert_eq!(arr[ ..3], [0,1,2 ]); assert_eq!(arr[1.. ], [ 1,2,3]); // RangeFrom assert_eq!(arr[1..3], [ 1,2 ]); }Run
Fields
start: Idx
The lower bound of the range (inclusive).
Methods
impl<Idx: PartialOrd<Idx>> RangeFrom<Idx>
[src]
fn contains(&self, item: Idx) -> bool
🔬 This is a nightly-only experimental API. (range_contains
#32311)
recently added as per RFC
impl<A: Step> RangeFrom<A>
[src]
fn step_by(self, by: A) -> StepBy<A, Self>
🔬 This is a nightly-only experimental API. (step_by
#27741)
recent addition
Trait Implementations
impl<Idx: Clone> Clone for RangeFrom<Idx>
[src]
fn clone(&self) -> RangeFrom<Idx>
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
impl<Idx: PartialEq> PartialEq for RangeFrom<Idx>
[src]
fn eq(&self, __arg_0: &RangeFrom<Idx>) -> bool
This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, __arg_0: &RangeFrom<Idx>) -> bool
This method tests for !=
.
impl<Idx: Eq> Eq for RangeFrom<Idx>
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impl<Idx: Hash> Hash for RangeFrom<Idx>
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fn hash<__HIdx: Hasher>(&self, __arg_0: &mut __HIdx)
Feeds this value into the given [Hasher
]. Read more
fn hash_slice<H: Hasher>(data: &[Self], state: &mut H) where
Self: Sized,
1.3.0
Self: Sized,
Feeds a slice of this type into the given [Hasher
]. Read more
impl<Idx: Debug> Debug for RangeFrom<Idx>
[src]
impl<A: Step> Iterator for RangeFrom<A> where
&'a A: Add<&'a A, Output = A>,
[src]
&'a A: Add<&'a A, Output = A>,
type Item = A
The type of the elements being iterated over.
fn next(&mut self) -> Option<A>
Advances the iterator and returns the next value. Read more
fn size_hint(&self) -> (usize, Option<usize>)
Returns the bounds on the remaining length of the iterator. Read more
fn count(self) -> usize where
Self: Sized,
Self: Sized,
Consumes the iterator, counting the number of iterations and returning it. Read more
fn last(self) -> Option<Self::Item> where
Self: Sized,
Self: Sized,
Consumes the iterator, returning the last element. Read more
fn nth(&mut self, n: usize) -> Option<Self::Item>
Returns the n
th element of the iterator. Read more
fn step_by(self, step: usize) -> StepBy<Self> where
Self: Sized,
Self: Sized,
🔬 This is a nightly-only experimental API. (iterator_step_by
#27741)
unstable replacement of Range::step_by
Creates an iterator starting at the same point, but stepping by the given amount at each iteration. Read more
fn chain<U>(self, other: U) -> Chain<Self, U::IntoIter> where
Self: Sized,
U: IntoIterator<Item = Self::Item>,
Self: Sized,
U: IntoIterator<Item = Self::Item>,
Takes two iterators and creates a new iterator over both in sequence. Read more
fn zip<U>(self, other: U) -> Zip<Self, U::IntoIter> where
Self: Sized,
U: IntoIterator,
Self: Sized,
U: IntoIterator,
'Zips up' two iterators into a single iterator of pairs. Read more
fn map<B, F>(self, f: F) -> Map<Self, F> where
Self: Sized,
F: FnMut(Self::Item) -> B,
Self: Sized,
F: FnMut(Self::Item) -> B,
Takes a closure and creates an iterator which calls that closure on each element. Read more
fn filter<P>(self, predicate: P) -> Filter<Self, P> where
Self: Sized,
P: FnMut(&Self::Item) -> bool,
Self: Sized,
P: FnMut(&Self::Item) -> bool,
Creates an iterator which uses a closure to determine if an element should be yielded. Read more
fn filter_map<B, F>(self, f: F) -> FilterMap<Self, F> where
Self: Sized,
F: FnMut(Self::Item) -> Option<B>,
Self: Sized,
F: FnMut(Self::Item) -> Option<B>,
Creates an iterator that both filters and maps. Read more
fn enumerate(self) -> Enumerate<Self> where
Self: Sized,
Self: Sized,
Creates an iterator which gives the current iteration count as well as the next value. Read more
fn peekable(self) -> Peekable<Self> where
Self: Sized,
Self: Sized,
Creates an iterator which can use peek
to look at the next element of the iterator without consuming it. Read more
fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P> where
Self: Sized,
P: FnMut(&Self::Item) -> bool,
Self: Sized,
P: FnMut(&Self::Item) -> bool,
Creates an iterator that [skip
]s elements based on a predicate. Read more
fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P> where
Self: Sized,
P: FnMut(&Self::Item) -> bool,
Self: Sized,
P: FnMut(&Self::Item) -> bool,
Creates an iterator that yields elements based on a predicate. Read more
fn skip(self, n: usize) -> Skip<Self> where
Self: Sized,
Self: Sized,
Creates an iterator that skips the first n
elements. Read more
fn take(self, n: usize) -> Take<Self> where
Self: Sized,
Self: Sized,
Creates an iterator that yields its first n
elements. Read more
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>,
Self: Sized,
F: FnMut(&mut St, Self::Item) -> Option<B>,
An iterator adaptor similar to [fold
] that holds internal state and produces a new iterator. Read more
fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F> where
Self: Sized,
U: IntoIterator,
F: FnMut(Self::Item) -> U,
Self: Sized,
U: IntoIterator,
F: FnMut(Self::Item) -> U,
Creates an iterator that works like map, but flattens nested structure. Read more
fn fuse(self) -> Fuse<Self> where
Self: Sized,
Self: Sized,
Creates an iterator which ends after the first [None
]. Read more
fn inspect<F>(self, f: F) -> Inspect<Self, F> where
Self: Sized,
F: FnMut(&Self::Item),
Self: Sized,
F: FnMut(&Self::Item),
Do something with each element of an iterator, passing the value on. Read more
fn by_ref(&mut self) -> &mut Self where
Self: Sized,
Self: Sized,
Borrows an iterator, rather than consuming it. Read more
fn collect<B: FromIterator<Self::Item>>(self) -> B where
Self: Sized,
Self: Sized,
Transforms an iterator into a collection. Read more
fn partition<B, F>(self, f: F) -> (B, B) where
Self: Sized,
B: Default + Extend<Self::Item>,
F: FnMut(&Self::Item) -> bool,
Self: Sized,
B: Default + Extend<Self::Item>,
F: FnMut(&Self::Item) -> bool,
Consumes an iterator, creating two collections from it. Read more
fn fold<B, F>(self, init: B, f: F) -> B where
Self: Sized,
F: FnMut(B, Self::Item) -> B,
Self: Sized,
F: FnMut(B, Self::Item) -> B,
An iterator adaptor that applies a function, producing a single, final value. Read more
fn all<F>(&mut self, f: F) -> bool where
Self: Sized,
F: FnMut(Self::Item) -> bool,
Self: Sized,
F: FnMut(Self::Item) -> bool,
Tests if every element of the iterator matches a predicate. Read more
fn any<F>(&mut self, f: F) -> bool where
Self: Sized,
F: FnMut(Self::Item) -> bool,
Self: Sized,
F: FnMut(Self::Item) -> bool,
Tests if any element of the iterator matches a predicate. Read more
fn find<P>(&mut self, predicate: P) -> Option<Self::Item> where
Self: Sized,
P: FnMut(&Self::Item) -> bool,
Self: Sized,
P: FnMut(&Self::Item) -> bool,
Searches for an element of an iterator that satisfies a predicate. Read more
fn position<P>(&mut self, predicate: P) -> Option<usize> where
Self: Sized,
P: FnMut(Self::Item) -> bool,
Self: Sized,
P: FnMut(Self::Item) -> bool,
Searches for an element in an iterator, returning its index. Read more
fn rposition<P>(&mut self, predicate: P) -> Option<usize> where
P: FnMut(Self::Item) -> bool,
Self: Sized + ExactSizeIterator + DoubleEndedIterator,
P: FnMut(Self::Item) -> bool,
Self: Sized + ExactSizeIterator + DoubleEndedIterator,
Searches for an element in an iterator from the right, returning its index. Read more
fn max(self) -> Option<Self::Item> where
Self: Sized,
Self::Item: Ord,
Self: Sized,
Self::Item: Ord,
Returns the maximum element of an iterator. Read more
fn min(self) -> Option<Self::Item> where
Self: Sized,
Self::Item: Ord,
Self: Sized,
Self::Item: Ord,
Returns the minimum element of an iterator. Read more
fn max_by_key<B: Ord, F>(self, f: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(&Self::Item) -> B,
1.6.0
Self: Sized,
F: FnMut(&Self::Item) -> B,
Returns the element that gives the maximum value from the specified function. Read more
fn max_by<F>(self, compare: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(&Self::Item, &Self::Item) -> Ordering,
1.15.0
Self: Sized,
F: FnMut(&Self::Item, &Self::Item) -> Ordering,
Returns the element that gives the maximum value with respect to the specified comparison function. Read more
fn min_by_key<B: Ord, F>(self, f: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(&Self::Item) -> B,
1.6.0
Self: Sized,
F: FnMut(&Self::Item) -> B,
Returns the element that gives the minimum value from the specified function. Read more
fn min_by<F>(self, compare: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(&Self::Item, &Self::Item) -> Ordering,
1.15.0
Self: Sized,
F: FnMut(&Self::Item, &Self::Item) -> Ordering,
Returns the element that gives the minimum value with respect to the specified comparison function. Read more
fn rev(self) -> Rev<Self> where
Self: Sized + DoubleEndedIterator,
Self: Sized + DoubleEndedIterator,
Reverses an iterator's direction. Read more
fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB) where
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
Self: Sized + Iterator<Item = (A, B)>,
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
Self: Sized + Iterator<Item = (A, B)>,
Converts an iterator of pairs into a pair of containers. Read more
fn cloned<'a, T: 'a>(self) -> Cloned<Self> where
Self: Sized + Iterator<Item = &'a T>,
T: Clone,
Self: Sized + Iterator<Item = &'a T>,
T: Clone,
Creates an iterator which [clone
]s all of its elements. Read more
fn cycle(self) -> Cycle<Self> where
Self: Sized + Clone,
Self: Sized + Clone,
Repeats an iterator endlessly. Read more
fn sum<S>(self) -> S where
Self: Sized,
S: Sum<Self::Item>,
1.11.0
Self: Sized,
S: Sum<Self::Item>,
Sums the elements of an iterator. Read more
fn product<P>(self) -> P where
Self: Sized,
P: Product<Self::Item>,
1.11.0
Self: Sized,
P: Product<Self::Item>,
Iterates over the entire iterator, multiplying all the elements Read more
fn cmp<I>(self, other: I) -> Ordering where
I: IntoIterator<Item = Self::Item>,
Self::Item: Ord,
Self: Sized,
1.5.0
I: IntoIterator<Item = Self::Item>,
Self::Item: Ord,
Self: Sized,
Lexicographically compares the elements of this Iterator
with those of another. Read more
fn partial_cmp<I>(self, other: I) -> Option<Ordering> where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
1.5.0
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
Lexicographically compares the elements of this Iterator
with those of another. Read more
fn eq<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialEq<I::Item>,
Self: Sized,
1.5.0
I: IntoIterator,
Self::Item: PartialEq<I::Item>,
Self: Sized,
Determines if the elements of this Iterator
are equal to those of another. Read more
fn ne<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialEq<I::Item>,
Self: Sized,
1.5.0
I: IntoIterator,
Self::Item: PartialEq<I::Item>,
Self: Sized,
Determines if the elements of this Iterator
are unequal to those of another. Read more
fn lt<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
1.5.0
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
Determines if the elements of this Iterator
are lexicographically less than those of another. Read more
fn le<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
1.5.0
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
Determines if the elements of this Iterator
are lexicographically less or equal to those of another. Read more
fn gt<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
1.5.0
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
Determines if the elements of this Iterator
are lexicographically greater than those of another. Read more
fn ge<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
1.5.0
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
Determines if the elements of this Iterator
are lexicographically greater than or equal to those of another. Read more
impl<A> FusedIterator for RangeFrom<A> where
A: Step,
&'a A: Add<&'a A, Output = A>,
[src]
A: Step,
&'a A: Add<&'a A, Output = A>,
impl<T> SliceIndex<[T]> for RangeFrom<usize>
1.15.0[src]
type Output = [T]
The output type returned by methods.
fn get(self, slice: &[T]) -> Option<&[T]>
Returns a shared reference to the output at this location, if in bounds. Read more
fn get_mut(self, slice: &mut [T]) -> Option<&mut [T]>
Returns a mutable reference to the output at this location, if in bounds. Read more
unsafe fn get_unchecked(self, slice: &[T]) -> &[T]
Returns a shared reference to the output at this location, without performing any bounds checking. Read more
unsafe fn get_unchecked_mut(self, slice: &mut [T]) -> &mut [T]
Returns a mutable reference to the output at this location, without performing any bounds checking. Read more
fn index(self, slice: &[T]) -> &[T]
Returns a shared reference to the output at this location, panicking if out of bounds. Read more
fn index_mut(self, slice: &mut [T]) -> &mut [T]
Returns a mutable reference to the output at this location, panicking if out of bounds. Read more
impl SliceIndex<str> for RangeFrom<usize>
[src]
type Output = str
The output type returned by methods.
fn get(self, slice: &str) -> Option<&Self::Output>
Returns a shared reference to the output at this location, if in bounds. Read more
fn get_mut(self, slice: &mut str) -> Option<&mut Self::Output>
Returns a mutable reference to the output at this location, if in bounds. Read more
unsafe fn get_unchecked(self, slice: &str) -> &Self::Output
Returns a shared reference to the output at this location, without performing any bounds checking. Read more
unsafe fn get_unchecked_mut(self, slice: &mut str) -> &mut Self::Output
Returns a mutable reference to the output at this location, without performing any bounds checking. Read more
fn index(self, slice: &str) -> &Self::Output
Returns a shared reference to the output at this location, panicking if out of bounds. Read more
fn index_mut(self, slice: &mut str) -> &mut Self::Output
Returns a mutable reference to the output at this location, panicking if out of bounds. Read more