Struct gcollections::wrappers::btree_set::BTreeSet

pub struct BTreeSet<T> {
    // some fields omitted
}

Methods

impl<T: Ord> BTreeSet<T>

fn wrap(ts: StdBTreeSet<T>) -> BTreeSet<T>

Methods from Deref<Target=StdBTreeSet<T>>

fn iter(&self) -> Iter<T>

Gets an iterator over the BTreeSet's contents.

Examples

use std::collections::BTreeSet;

let set: BTreeSet<usize> = [1, 2, 3, 4].iter().cloned().collect();

for x in set.iter() {
    println!("{}", x);
}

let v: Vec<_> = set.iter().cloned().collect();
assert_eq!(v, [1, 2, 3, 4]);

fn range<Min, Max>(&'a self, min: Bound<&Min>, max: Bound<&Max>) -> Range<'a, T> where Max: Ord + ?Sized, Min: Ord + ?Sized, T: Borrow<Min> + Borrow<Max>

Unstable (btree_range)

: matches collection reform specification, waiting for dust to settle

Constructs a double-ended iterator over a sub-range of elements in the set, starting at min, and ending at max. If min is Unbounded, then it will be treated as "negative infinity", and if max is Unbounded, then it will be treated as "positive infinity". Thus range(Unbounded, Unbounded) will yield the whole collection.

Examples

#![feature(btree_range, collections_bound)]

use std::collections::BTreeSet;
use std::collections::Bound::{Included, Unbounded};

let mut set = BTreeSet::new();
set.insert(3);
set.insert(5);
set.insert(8);
for &elem in set.range(Included(&4), Included(&8)) {
    println!("{}", elem);
}
assert_eq!(Some(&5), set.range(Included(&4), Unbounded).next());

fn difference(&'a self, other: &'a BTreeSet<T>) -> Difference<'a, T>

Visits the values representing the difference, in ascending order.

Examples

use std::collections::BTreeSet;

let mut a = BTreeSet::new();
a.insert(1);
a.insert(2);

let mut b = BTreeSet::new();
b.insert(2);
b.insert(3);

let diff: Vec<_> = a.difference(&b).cloned().collect();
assert_eq!(diff, [1]);

fn symmetric_difference(&'a self, other: &'a BTreeSet<T>) -> SymmetricDifference<'a, T>

Visits the values representing the symmetric difference, in ascending order.

Examples

use std::collections::BTreeSet;

let mut a = BTreeSet::new();
a.insert(1);
a.insert(2);

let mut b = BTreeSet::new();
b.insert(2);
b.insert(3);

let sym_diff: Vec<_> = a.symmetric_difference(&b).cloned().collect();
assert_eq!(sym_diff, [1, 3]);

fn intersection(&'a self, other: &'a BTreeSet<T>) -> Intersection<'a, T>

Visits the values representing the intersection, in ascending order.

Examples

use std::collections::BTreeSet;

let mut a = BTreeSet::new();
a.insert(1);
a.insert(2);

let mut b = BTreeSet::new();
b.insert(2);
b.insert(3);

let intersection: Vec<_> = a.intersection(&b).cloned().collect();
assert_eq!(intersection, [2]);

fn union(&'a self, other: &'a BTreeSet<T>) -> Union<'a, T>

Visits the values representing the union, in ascending order.

Examples

use std::collections::BTreeSet;

let mut a = BTreeSet::new();
a.insert(1);

let mut b = BTreeSet::new();
b.insert(2);

let union: Vec<_> = a.union(&b).cloned().collect();
assert_eq!(union, [1, 2]);

fn len(&self) -> usize

Returns the number of elements in the set.

Examples

use std::collections::BTreeSet;

let mut v = BTreeSet::new();
assert_eq!(v.len(), 0);
v.insert(1);
assert_eq!(v.len(), 1);

fn is_empty(&self) -> bool

Returns true if the set contains no elements.

Examples

use std::collections::BTreeSet;

let mut v = BTreeSet::new();
assert!(v.is_empty());
v.insert(1);
assert!(!v.is_empty());

fn clear(&mut self)

Clears the set, removing all values.

Examples

use std::collections::BTreeSet;

let mut v = BTreeSet::new();
v.insert(1);
v.clear();
assert!(v.is_empty());

fn contains<Q>(&self, value: &Q) -> bool where Q: Ord + ?Sized, T: Borrow<Q>

Returns true if the set contains a value.

The value may be any borrowed form of the set's value type, but the ordering on the borrowed form must match the ordering on the value type.

Examples

use std::collections::BTreeSet;

let set: BTreeSet<_> = [1, 2, 3].iter().cloned().collect();
assert_eq!(set.contains(&1), true);
assert_eq!(set.contains(&4), false);

fn get<Q>(&self, value: &Q) -> Option<&T> where Q: Ord + ?Sized, T: Borrow<Q>

Returns a reference to the value in the set, if any, that is equal to the given value.

The value may be any borrowed form of the set's value type, but the ordering on the borrowed form must match the ordering on the value type.

fn is_disjoint(&self, other: &BTreeSet<T>) -> bool

Returns true if the set has no elements in common with other. This is equivalent to checking for an empty intersection.

Examples

use std::collections::BTreeSet;

let a: BTreeSet<_> = [1, 2, 3].iter().cloned().collect();
let mut b = BTreeSet::new();

assert_eq!(a.is_disjoint(&b), true);
b.insert(4);
assert_eq!(a.is_disjoint(&b), true);
b.insert(1);
assert_eq!(a.is_disjoint(&b), false);

fn is_subset(&self, other: &BTreeSet<T>) -> bool

Returns true if the set is a subset of another.

Examples

use std::collections::BTreeSet;

let sup: BTreeSet<_> = [1, 2, 3].iter().cloned().collect();
let mut set = BTreeSet::new();

assert_eq!(set.is_subset(&sup), true);
set.insert(2);
assert_eq!(set.is_subset(&sup), true);
set.insert(4);
assert_eq!(set.is_subset(&sup), false);

fn is_superset(&self, other: &BTreeSet<T>) -> bool

Returns true if the set is a superset of another.

Examples

use std::collections::BTreeSet;

let sub: BTreeSet<_> = [1, 2].iter().cloned().collect();
let mut set = BTreeSet::new();

assert_eq!(set.is_superset(&sub), false);

set.insert(0);
set.insert(1);
assert_eq!(set.is_superset(&sub), false);

set.insert(2);
assert_eq!(set.is_superset(&sub), true);

fn insert(&mut self, value: T) -> bool

Adds a value to the set.

If the set did not have this value present, true is returned.

If the set did have this value present, false is returned, and the entry is not updated. See the module-level documentation for more.

Examples

use std::collections::BTreeSet;

let mut set = BTreeSet::new();

assert_eq!(set.insert(2), true);
assert_eq!(set.insert(2), false);
assert_eq!(set.len(), 1);

fn replace(&mut self, value: T) -> Option<T>

Adds a value to the set, replacing the existing value, if any, that is equal to the given one. Returns the replaced value.

fn remove<Q>(&mut self, value: &Q) -> bool where Q: Ord + ?Sized, T: Borrow<Q>

Removes a value from the set. Returns true if the value was present in the set.

The value may be any borrowed form of the set's value type, but the ordering on the borrowed form must match the ordering on the value type.

Examples

use std::collections::BTreeSet;

let mut set = BTreeSet::new();

set.insert(2);
assert_eq!(set.remove(&2), true);
assert_eq!(set.remove(&2), false);

fn take<Q>(&mut self, value: &Q) -> Option<T> where Q: Ord + ?Sized, T: Borrow<Q>

Removes and returns the value in the set, if any, that is equal to the given one.

The value may be any borrowed form of the set's value type, but the ordering on the borrowed form must match the ordering on the value type.

fn append(&mut self, other: &mut BTreeSet<T>)

Moves all elements from other into Self, leaving other empty.

Examples

use std::collections::BTreeSet;

let mut a = BTreeSet::new();
a.insert(1);
a.insert(2);
a.insert(3);

let mut b = BTreeSet::new();
b.insert(3);
b.insert(4);
b.insert(5);

a.append(&mut b);

assert_eq!(a.len(), 5);
assert_eq!(b.len(), 0);

assert!(a.contains(&1));
assert!(a.contains(&2));
assert!(a.contains(&3));
assert!(a.contains(&4));
assert!(a.contains(&5));

fn split_off<Q>(&mut self, key: &Q) -> BTreeSet<T> where Q: Ord + ?Sized, T: Borrow<Q>

Splits the collection into two at the given key. Returns everything after the given key, including the key.

Examples

Basic usage:

use std::collections::BTreeMap;

let mut a = BTreeMap::new();
a.insert(1, "a");
a.insert(2, "b");
a.insert(3, "c");
a.insert(17, "d");
a.insert(41, "e");

let b = a.split_off(&3);

assert_eq!(a.len(), 2);
assert_eq!(b.len(), 3);

assert_eq!(a[&1], "a");
assert_eq!(a[&2], "b");

assert_eq!(b[&3], "c");
assert_eq!(b[&17], "d");
assert_eq!(b[&41], "e");

Trait Implementations

impl<T> Deref for BTreeSet<T>

type Target = StdBTreeSet<T>

The resulting type after dereferencing

fn deref<'a>(&'a self) -> &'a StdBTreeSet<T>

The method called to dereference a value

impl<T> DerefMut for BTreeSet<T>

fn deref_mut<'a>(&'a mut self) -> &'a mut StdBTreeSet<T>

The method called to mutably dereference a value

impl<T: Ord> Contains<T> for BTreeSet<T>

fn contains(&self, value: &T) -> bool

impl<T> Intersection for BTreeSet<T> where T: Ord + Clone

type Output = BTreeSet<T>

fn intersection(&self, other: &BTreeSet<T>) -> BTreeSet<T>

impl<T> Union for BTreeSet<T> where T: Ord + Clone

type Output = BTreeSet<T>

fn union(&self, other: &BTreeSet<T>) -> BTreeSet<T>

impl<T> Difference for BTreeSet<T> where T: Ord + Clone

type Output = BTreeSet<T>

fn difference(&self, other: &BTreeSet<T>) -> BTreeSet<T>

impl<T> SymmetricDifference for BTreeSet<T> where T: Ord + Clone

type Output = BTreeSet<T>

fn symmetric_difference(&self, other: &BTreeSet<T>) -> BTreeSet<T>