Trait core::ops::RangeBounds1.28.0[−][src]

pub trait RangeBounds<T: ?Sized> {
    fn start_bound(&self) -> Bound<&T>;

    fn end_bound(&self) -> Bound<&T>;

    fn contains<U: ?Sized>(&self, item: &U) -> bool
    where
        T: PartialOrd<U>,
        U: PartialOrd<T>,
    { ... }
}

RangeBounds is implemented by Rust's built-in range types, produced by range syntax like .., a.., ..b or c..d.

Required Methods

Start index bound.

Returns the start value as a Bound.

Examples

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.

Examples

use std::ops::Bound::*;
use std::ops::RangeBounds;

assert_eq!((3..).end_bound(), Unbounded);
assert_eq!((3..10).end_bound(), Excluded(&10));Run

Provided Methods

🔬 This is a nightly-only experimental API. (range_contains #32311)

recently added as per RFC

Returns true if item is contained in the range.

Examples

#![feature(range_contains)]

use std::f32;

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

Implementors