1.28.0[−][src]Trait core::ops::RangeBounds

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, ..=c, d..e, or f..=g.

Required methods

fn start_bound(&self) -> Bound<&T>

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

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

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
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Provided methods

fn contains<U: ?Sized>(&self, item: &U) -> bool where
    T: PartialOrd<U>,
    U: PartialOrd<T>, 1.35.0

Returns true if item is contained in the range.

Examples

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
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Implementors

impl<'_, T> RangeBounds<T> for Range<&'_ T>[src]

impl<'_, T> RangeBounds<T> for RangeFrom<&'_ T>[src]

impl<'_, T> RangeBounds<T> for RangeInclusive<&'_ T>[src]

impl<'_, T> RangeBounds<T> for RangeTo<&'_ T>[src]

impl<'_, T> RangeBounds<T> for RangeToInclusive<&'_ T>[src]

impl<'a, T: ?Sized + 'a> RangeBounds<T> for (Bound<&'a T>, Bound<&'a T>)[src]

impl<T> RangeBounds<T> for (Bound<T>, Bound<T>)[src]

impl<T> RangeBounds<T> for Range<T>[src]

impl<T> RangeBounds<T> for RangeFrom<T>[src]

impl<T> RangeBounds<T> for RangeInclusive<T>[src]

impl<T> RangeBounds<T> for RangeTo<T>[src]

impl<T> RangeBounds<T> for RangeToInclusive<T>[src]

impl<T: ?Sized> RangeBounds<T> for RangeFull[src]

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