# Enum std::ops::Bound 1.17.0[−][src]

    pub enum Bound<T> {
        Included(T),
        Excluded(T),
        Unbounded,
    }

An endpoint of a range of keys.

# Examples

`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));Run

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());Run

## Variants

`Included(T)`

An inclusive bound.

`Excluded(T)`

An exclusive bound.

`Unbounded`

An infinite endpoint. Indicates that there is no bound in this direction.

## Trait Implementations

###

`impl<T> Hash for Bound<T> where T: Hash,`

[src]

####

`fn hash<__HT>(&self, state: &mut __HT) where __HT: Hasher,`

[src]

Feeds this value into the given [`Hasher`]. Read more

####

`fn hash_slice<H>(data: &[Self], state: &mut H) where H: Hasher,`

1.3.0
[src]

Feeds a slice of this type into the given [`Hasher`]. Read more

###

`impl<T> Clone for Bound<T> where T: Clone,`

[src]

####

`fn clone(&self) -> Bound<T>`

[src]

Returns a copy of the value. Read more

####

`fn clone_from(&mut self, source: &Self)`

1.0.0
[src]

Performs copy-assignment from `source`. Read more

###

`impl<T> Debug for Bound<T> where T: Debug,`

[src]

####

`fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`

[src]

Formats the value using the given formatter. Read more

###

`impl<T> Eq for Bound<T> where T: Eq,`

[src]

###

`impl<T> PartialEq<Bound<T>> for Bound<T> where T: PartialEq<T>,`

[src]

####

`fn eq(&self, other: &Bound<T>) -> bool`

[src]

This method tests for `self` and `other` values to be equal, and is used by `==`. Read more

####

`fn ne(&self, other: &Bound<T>) -> bool`

[src]

This method tests for `!=`.

###

`impl<T> Copy for Bound<T> where T: Copy,`

[src]

## Auto Trait Implementations

###

`impl<T> Send for Bound<T> where T: Send,`

###

`impl<T> Sync for Bound<T> where T: Sync,`

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