pub trait RangeBounds<T: ?Sized> {
// Required methods
fn start_bound(&self) -> Bound<&T>;
fn end_bound(&self) -> Bound<&T>;
// Provided method
fn contains<U>(&self, item: &U) -> bool
where T: PartialOrd<U>,
U: ?Sized + PartialOrd<T> { ... }
}
Expand description
RangeBounds is implemented by Rust’s built-in range types, produced
by range syntax like .., a.., ..b, ..=c, d..e, or f..=g.
Start index bound.
Returns the start value as a Bound.
use std::ops::Bound::*;
use std::ops::RangeBounds;
assert_eq!((..10).start_bound(), Unbounded);
assert_eq!((3..10).start_bound(), Included(&3));
Run
End index bound.
Returns the end value as a Bound.
use std::ops::Bound::*;
use std::ops::RangeBounds;
assert_eq!((3..).end_bound(), Unbounded);
assert_eq!((3..10).end_bound(), Excluded(&10));
Run
Returns true if item is contained in the range.
assert!( (3..5).contains(&4));
assert!(!(3..5).contains(&2));
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