# 1.17.0[−][src]Enum std::ops::Bound

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

[src]

###

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

[src]

###

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

[src]

####

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

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

####

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

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This method tests for `!=`.

###

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

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####

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

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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

## Auto Trait Implementations

###

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

###

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

## Blanket Implementations

###

`impl<T> From for T`

[src]

####

`fn from(t: T) -> T`

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Performs the conversion.

###

`impl<T, U> TryFrom for T where T: From<U>,`

[src]

#### `type Error = !`

🔬 This is a nightly-only experimental API. (`try_from` #33417)

The type returned in the event of a conversion error.

####

`fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>`

[src]

🔬 This is a nightly-only experimental API. (`try_from` #33417)

Performs the conversion.

###

`impl<T, U> TryInto for T where U: TryFrom<T>,`

[src]

#### `type Error = <U as TryFrom<T>>::Error`

🔬 This is a nightly-only experimental API. (`try_from` #33417)

The type returned in the event of a conversion error.

####

`fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>`

[src]

🔬 This is a nightly-only experimental API. (`try_from` #33417)

Performs the conversion.

###

`impl<T, U> Into for T where U: From<T>,`

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####

`fn into(self) -> U`

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Performs the conversion.

###

`impl<T> Borrow for T where T: ?Sized,`

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####
ⓘImportant traits for &'a mut I

### Important traits for &'a mut I

`impl<'a, I> Iterator for &'a mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<'a, R: Read + ?Sized> Read for &'a mut Rimpl<'a, W: Write + ?Sized> Write for &'a mut W`

`fn borrow(&self) -> &T`

[src]

Immutably borrows from an owned value. Read more

###

`impl<T> BorrowMut for T where T: ?Sized,`

[src]

####
ⓘImportant traits for &'a mut I

### Important traits for &'a mut I

`impl<'a, I> Iterator for &'a mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<'a, R: Read + ?Sized> Read for &'a mut Rimpl<'a, W: Write + ?Sized> Write for &'a mut W`

`fn borrow_mut(&mut self) -> &mut T`

[src]

Mutably borrows from an owned value. Read more

###

`impl<T> Any for T where T: 'static + ?Sized,`

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####

`fn get_type_id(&self) -> TypeId`

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🔬 This is a nightly-only experimental API. (`get_type_id` #27745)

this method will likely be replaced by an associated static

Gets the `TypeId` of `self`. Read more

###

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

[src]

#### `type Owned = T`

####

`fn to_owned(&self) -> T`

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Creates owned data from borrowed data, usually by cloning. Read more

####

`fn clone_into(&self, target: &mut T)`

[src]

🔬 This is a nightly-only experimental API. (`toowned_clone_into` #41263)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

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