pub struct Range<Idx> {
pub start: Idx,
pub end: Idx,
}
1.0.0A (half-open) range which is bounded at both ends: { x | start <= x < end }.
Use start..end
(two dots) for its shorthand.
See the contains()
method for its characterization.
#![feature(iter_arith)]
fn main() {
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];
assert_eq!(arr[ .. ], [0,1,2,3]);
assert_eq!(arr[ ..3], [0,1,2 ]);
assert_eq!(arr[1.. ], [ 1,2,3]);
assert_eq!(arr[1..3], [ 1,2 ]);
}
Fields
start | The lower bound of the range (inclusive).
|
end | The upper bound of the range (exclusive).
|
Methods
impl<A> Range<A> where A: Step
Unstable (step_by
): recent addition
Creates an iterator with the same range, but stepping by the
given amount at each iteration.
The resulting iterator handles overflow by stopping.
#![feature(step_by)]
for i in (0..10).step_by(2) {
println!("{}", i);
}
This prints:
0
2
4
6
8
impl<Idx> Range<Idx> where Idx: PartialOrd<Idx>
fn contains(&self, item: Idx) -> bool
Unstable (range_contains
): recently added as per RFC
#![feature(range_contains)]
fn main() {
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));
}
Trait Implementations
impl<A> Iterator for Range<A> where A: One + Step, &'a A: Add<&'a A>, &'a A::Output == A
type Item = A
fn next(&mut self) -> Option<A>
fn count(self) -> usize
fn nth(&mut self, n: usize) -> Option<Self::Item>
fn map<B, F>(self, f: F) -> Map<Self, F> where F: FnMut(Self::Item) -> B
fn filter<P>(self, predicate: P) -> Filter<Self, P> where P: FnMut(&Self::Item) -> bool
fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P> where P: FnMut(&Self::Item) -> bool
fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P> where P: FnMut(&Self::Item) -> bool
fn skip(self, n: usize) -> Skip<Self>
fn take(self, n: usize) -> Take<Self>
fn scan<St, B, F>(self, initial_state: St, f: F) -> Scan<Self, St, F> where F: FnMut(&mut St, Self::Item) -> Option<B>
fn fuse(self) -> Fuse<Self>
fn inspect<F>(self, f: F) -> Inspect<Self, F> where F: FnMut(&Self::Item) -> ()
fn by_ref(&mut self) -> &mut Self
fn partition<B, F>(self, f: F) -> (B, B) where F: FnMut(&Self::Item) -> bool, B: Default + Extend<Self::Item>
fn fold<B, F>(self, init: B, f: F) -> B where F: FnMut(B, Self::Item) -> B
fn all<F>(&mut self, f: F) -> bool where F: FnMut(Self::Item) -> bool
fn any<F>(&mut self, f: F) -> bool where F: FnMut(Self::Item) -> bool
fn find<P>(&mut self, predicate: P) -> Option<Self::Item> where P: FnMut(&Self::Item) -> bool
fn position<P>(&mut self, predicate: P) -> Option<usize> where P: FnMut(Self::Item) -> bool
1.6.0fn max_by_key<B, F>(self, f: F) -> Option<Self::Item> where B: Ord, F: FnMut(&Self::Item) -> B
1.6.0fn min_by_key<B, F>(self, f: F) -> Option<Self::Item> where B: Ord, F: FnMut(&Self::Item) -> B
fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB) where Self: Iterator<Item=(A, B)>, FromA: Default + Extend<A>, FromB: Default + Extend<B>
fn cloned<'a, T>(self) -> Cloned<Self> where Self: Iterator<Item=&'a T>, T: 'a + Clone
fn cycle(self) -> Cycle<Self> where Self: Clone
fn sum<S>(self) -> S where S: Add<Self::Item, Output=S> + Zero
fn product<P>(self) -> P where P: Mul<Self::Item, Output=P> + One
impl<Idx> Debug for Range<Idx> where Idx: Debug
Derived Implementations
impl<Idx> Clone for Range<Idx> where Idx: Clone
fn eq(&self, __arg_0: &Range<Idx>) -> bool
fn ne(&self, __arg_0: &Range<Idx>) -> bool
impl<Idx> Eq for Range<Idx> where Idx: Eq