Trait std::ops::RangeBounds

1.28.0 · source ·

pub trait RangeBounds<T> where
  T: ?Sized, {
 fn start_bound(&self) -> Bound<&T>;
 fn end_bound(&self) -> Bound<&T>;
 fn contains<U>(&self, item: &U) -> bool 
  where
    T: PartialOrd<U>,
    U: PartialOrd<T> + ?Sized ,
 { ... }
}

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.

Required Methods

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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

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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

Provided Methods

1.35.0 · source

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

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

Implementors

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

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impl<T> RangeBounds<T> for (Bound<T>, Bound<T>)

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impl<T> RangeBounds<T> for Range<&T>

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impl<T> RangeBounds<T> for Range<T>

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impl<T> RangeBounds<T> for RangeFrom<&T>

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impl<T> RangeBounds<T> for RangeFrom<T>

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impl<T> RangeBounds<T> for RangeFull where
T: ?Sized,

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impl<T> RangeBounds<T> for RangeInclusive<&T>

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impl<T> RangeBounds<T> for RangeInclusive<T>

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impl<T> RangeBounds<T> for RangeTo<&T>

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impl<T> RangeBounds<T> for RangeTo<T>

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impl<T> RangeBounds<T> for RangeToInclusive<&T>

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impl<T> RangeBounds<T> for RangeToInclusive<T>