pub enum Bound<T> { Included(T), Excluded(T), Unbounded, }
An endpoint of a range of keys.
Bound
s are range endpoints:
use std::ops::Bound::*; use std::ops::RangeBounds; assert_eq!((..100).start_bound(), Unbounded); assert_eq!((1..12).start_bound(), Included(&1)); assert_eq!((1..12).end_bound(), Excluded(&12));
Using a tuple of Bound
s as an argument to BTreeMap::range
. Note that in most cases, it's better to use range syntax (1..5
) instead.
use std::collections::BTreeMap; use std::ops::Bound::{Excluded, Included, Unbounded}; let mut map = BTreeMap::new(); map.insert(3, "a"); map.insert(5, "b"); map.insert(8, "c"); for (key, value) in map.range((Excluded(3), Included(8))) { println!("{}: {}", key, value); } assert_eq!(Some((&3, &"a")), map.range((Unbounded, Included(5))).next());
Included(T)
An inclusive bound.
Excluded(T)
An exclusive bound.
Unbounded
An infinite endpoint. Indicates that there is no bound in this direction.
impl<'_, T> Bound<&'_ T> where
T: Clone,
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pub fn cloned(self) -> Bound<T>
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Map a Bound<&T>
to a Bound<T>
by cloning the contents of the bound.
#![feature(bound_cloned)] use std::ops::Bound::*; use std::ops::RangeBounds; assert_eq!((1..12).start_bound(), Included(&1)); assert_eq!((1..12).start_bound().cloned(), Included(1));
impl<T> Clone for Bound<T> where
T: Clone,
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impl<T> Copy for Bound<T> where
T: Copy,
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impl<T> Debug for Bound<T> where
T: Debug,
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impl<T> Eq for Bound<T> where
T: Eq,
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impl<T> Hash for Bound<T> where
T: Hash,
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fn hash<__H>(&self, state: &mut __H) where
__H: Hasher,
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fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
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impl<T> PartialEq<Bound<T>> for Bound<T> where
T: PartialEq<T>,
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impl<T> StructuralEq for Bound<T>
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impl<T> StructuralPartialEq for Bound<T>
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impl<T> RefUnwindSafe for Bound<T> where
T: RefUnwindSafe,
impl<T> Send for Bound<T> where
T: Send,
impl<T> Sync for Bound<T> where
T: Sync,
impl<T> Unpin for Bound<T> where
T: Unpin,
impl<T> UnwindSafe for Bound<T> where
T: UnwindSafe,
impl<T> Any for T where
T: 'static + ?Sized,
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impl<T> Borrow<T> for T where
T: ?Sized,
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fn borrow(&self) -> &TⓘNotable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized,
type Output = <F as Future>::Output;
impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized,
type Item = <I as Iterator>::Item;
impl<R: Read + ?Sized, '_> Read for &'_ mut R
impl<W: Write + ?Sized, '_> Write for &'_ mut W
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impl<T> BorrowMut<T> for T where
T: ?Sized,
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fn borrow_mut(&mut self) -> &mut TⓘNotable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized,
type Output = <F as Future>::Output;
impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized,
type Item = <I as Iterator>::Item;
impl<R: Read + ?Sized, '_> Read for &'_ mut R
impl<W: Write + ?Sized, '_> Write for &'_ mut W
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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impl<T> ToOwned for T where
T: Clone,
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type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/ops/enum.Bound.html