[][src]Struct heapless::IndexSet

pub struct IndexSet<T, N, S> where
    T: Eq + Hash,
    N: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>, 
{ /* fields omitted */ }

Fixed capacity IndexSet

Note that the capacity of the IndexSet must be a power of 2.

Examples

use heapless::FnvIndexSet;
use heapless::consts::*;

// A hash set with a capacity of 16 elements allocated on the stack
let mut books = FnvIndexSet::<_, U16>::new();

// Add some books.
books.insert("A Dance With Dragons").unwrap();
books.insert("To Kill a Mockingbird").unwrap();
books.insert("The Odyssey").unwrap();
books.insert("The Great Gatsby").unwrap();

// Check for a specific one.
if !books.contains("The Winds of Winter") {
    println!("We have {} books, but The Winds of Winter ain't one.",
             books.len());
}

// Remove a book.
books.remove("The Odyssey");

// Iterate over everything.
for book in &books {
    println!("{}", book);
}

Methods

impl<T, N, S> IndexSet<T, N, BuildHasherDefault<S>> where
    T: Eq + Hash,
    S: Default + Hasher,
    N: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>> + PowerOfTwo
[src]

pub fn new() -> Self[src]

Creates an empty IndexSet

impl<T, N, S> IndexSet<T, N, S> where
    T: Eq + Hash,
    S: BuildHasher,
    N: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>, 
[src]

pub fn capacity(&self) -> usize[src]

Returns the number of elements the set can hold

Examples

use heapless::FnvIndexSet;
use heapless::consts::*;

let set = FnvIndexSet::<i32, U16>::new();
assert_eq!(set.capacity(), 16);

pub fn iter(&self) -> Iter<T>[src]

Return an iterator over the values of the set, in their order

Examples

use heapless::FnvIndexSet;
use heapless::consts::*;

let mut set = FnvIndexSet::<_, U16>::new();
set.insert("a").unwrap();
set.insert("b").unwrap();

// Will print in an arbitrary order.
for x in set.iter() {
    println!("{}", x);
}

pub fn difference<'a, N2, S2>(
    &'a self,
    other: &'a IndexSet<T, N2, S2>
) -> Difference<'a, T, N2, S2> where
    N2: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>,
    S2: BuildHasher
[src]

Visits the values representing the difference, i.e. the values that are in self but not in other.

Examples

use heapless::FnvIndexSet;
use heapless::consts::*;

let mut a: FnvIndexSet<_, U16> = [1, 2, 3].iter().cloned().collect();
let mut b: FnvIndexSet<_, U16> = [4, 2, 3, 4].iter().cloned().collect();

// Can be seen as `a - b`.
for x in a.difference(&b) {
    println!("{}", x); // Print 1
}

let diff: FnvIndexSet<_, U16> = a.difference(&b).collect();
assert_eq!(diff, [1].iter().collect::<FnvIndexSet<_, U16>>());

// Note that difference is not symmetric,
// and `b - a` means something else:
let diff: FnvIndexSet<_, U16> = b.difference(&a).collect();
assert_eq!(diff, [4].iter().collect::<FnvIndexSet<_, U16>>());

pub fn symmetric_difference<'a, N2, S2>(
    &'a self,
    other: &'a IndexSet<T, N2, S2>
) -> impl Iterator<Item = &'a T> where
    N2: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>,
    S2: BuildHasher
[src]

Visits the values representing the symmetric difference, i.e. the values that are in self or in other but not in both.

Examples

use heapless::FnvIndexSet;
use heapless::consts::*;

let mut a: FnvIndexSet<_, U16> = [1, 2, 3].iter().cloned().collect();
let mut b: FnvIndexSet<_, U16> = [4, 2, 3, 4].iter().cloned().collect();

// Print 1, 4 in that order order.
for x in a.symmetric_difference(&b) {
    println!("{}", x);
}

let diff1: FnvIndexSet<_, U16> = a.symmetric_difference(&b).collect();
let diff2: FnvIndexSet<_, U16> = b.symmetric_difference(&a).collect();

assert_eq!(diff1, diff2);
assert_eq!(diff1, [1, 4].iter().collect::<FnvIndexSet<_, U16>>());

pub fn intersection<'a, N2, S2>(
    &'a self,
    other: &'a IndexSet<T, N2, S2>
) -> Intersection<'a, T, N2, S2> where
    N2: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>,
    S2: BuildHasher
[src]

Visits the values representing the intersection, i.e. the values that are both in self and other.

Examples

use heapless::FnvIndexSet;
use heapless::consts::*;

let mut a: FnvIndexSet<_, U16> = [1, 2, 3].iter().cloned().collect();
let mut b: FnvIndexSet<_, U16> = [4, 2, 3, 4].iter().cloned().collect();

// Print 2, 3 in that order.
for x in a.intersection(&b) {
    println!("{}", x);
}

let intersection: FnvIndexSet<_, U16> = a.intersection(&b).collect();
assert_eq!(intersection, [2, 3].iter().collect::<FnvIndexSet<_, U16>>());

pub fn union<'a, N2, S2>(
    &'a self,
    other: &'a IndexSet<T, N2, S2>
) -> impl Iterator<Item = &'a T> where
    N2: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>,
    S2: BuildHasher
[src]

Visits the values representing the union, i.e. all the values in self or other, without duplicates.

Examples

use heapless::FnvIndexSet;
use heapless::consts::*;

let mut a: FnvIndexSet<_, U16> = [1, 2, 3].iter().cloned().collect();
let mut b: FnvIndexSet<_, U16> = [4, 2, 3, 4].iter().cloned().collect();

// Print 1, 2, 3, 4 in that order.
for x in a.union(&b) {
    println!("{}", x);
}

let union: FnvIndexSet<_, U16> = a.union(&b).collect();
assert_eq!(union, [1, 2, 3, 4].iter().collect::<FnvIndexSet<_, U16>>());

pub fn len(&self) -> usize[src]

Returns the number of elements in the set.

Examples

use heapless::FnvIndexSet;
use heapless::consts::*;

let mut v: FnvIndexSet<_, U16> = FnvIndexSet::new();
assert_eq!(v.len(), 0);
v.insert(1).unwrap();
assert_eq!(v.len(), 1);

pub fn is_empty(&self) -> bool[src]

Returns true if the set contains no elements.

Examples

use heapless::FnvIndexSet;
use heapless::consts::*;

let mut v: FnvIndexSet<_, U16> = FnvIndexSet::new();
assert!(v.is_empty());
v.insert(1).unwrap();
assert!(!v.is_empty());

pub fn clear(&mut self)[src]

Clears the set, removing all values.

Examples

use heapless::FnvIndexSet;
use heapless::consts::*;

let mut v: FnvIndexSet<_, U16> = FnvIndexSet::new();
v.insert(1).unwrap();
v.clear();
assert!(v.is_empty());

pub fn contains<Q: ?Sized>(&self, value: &Q) -> bool where
    T: Borrow<Q>,
    Q: Eq + Hash
[src]

Returns true if the set contains a value.

The value may be any borrowed form of the set's value type, but Hash and Eq on the borrowed form must match those for the value type.

Examples

use heapless::FnvIndexSet;
use heapless::consts::*;

let set: FnvIndexSet<_, U16> = [1, 2, 3].iter().cloned().collect();
assert_eq!(set.contains(&1), true);
assert_eq!(set.contains(&4), false);

pub fn is_disjoint<N2, S2>(&self, other: &IndexSet<T, N2, S2>) -> bool where
    N2: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>,
    S2: BuildHasher
[src]

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

Examples

use heapless::FnvIndexSet;
use heapless::consts::*;

let a: FnvIndexSet<_, U16> = [1, 2, 3].iter().cloned().collect();
let mut b = FnvIndexSet::<_, U16>::new();

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

pub fn is_subset<N2, S2>(&self, other: &IndexSet<T, N2, S2>) -> bool where
    N2: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>,
    S2: BuildHasher
[src]

Returns true if the set is a subset of another, i.e. other contains at least all the values in self.

Examples

use heapless::FnvIndexSet;
use heapless::consts::*;

let sup: FnvIndexSet<_, U16> = [1, 2, 3].iter().cloned().collect();
let mut set = FnvIndexSet::<_, U16>::new();

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

pub fn is_superset<N2, S2>(&self, other: &IndexSet<T, N2, S2>) -> bool where
    N2: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>,
    S2: BuildHasher
[src]

Examples

use heapless::FnvIndexSet;
use heapless::consts::*;

let sub: FnvIndexSet<_, U16> = [1, 2].iter().cloned().collect();
let mut set = FnvIndexSet::<_, U16>::new();

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

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

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

pub fn insert(&mut self, value: T) -> Result<bool, T>[src]

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.

Examples

use heapless::FnvIndexSet;
use heapless::consts::*;

let mut set = FnvIndexSet::<_, U16>::new();

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

pub fn remove<Q: ?Sized>(&mut self, value: &Q) -> bool where
    T: Borrow<Q>,
    Q: Eq + Hash
[src]

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 Hash and Eq on the borrowed form must match those for the value type.

Examples

use heapless::FnvIndexSet;
use heapless::consts::*;

let mut set = FnvIndexSet::<_, U16>::new();

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

Trait Implementations

impl<T, N, S> Debug for IndexSet<T, N, S> where
    T: Eq + Hash + Debug,
    S: BuildHasher,
    N: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>, 
[src]

impl<T, N1, N2, S1, S2> PartialEq<IndexSet<T, N2, S2>> for IndexSet<T, N1, S1> where
    T: Eq + Hash,
    S1: BuildHasher,
    S2: BuildHasher,
    N1: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>,
    N2: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>, 
[src]

#[must_use]
fn ne(&self, other: &Rhs) -> bool
1.0.0
[src]

This method tests for !=.

impl<T, N, S> FromIterator<T> for IndexSet<T, N, S> where
    T: Eq + Hash,
    S: BuildHasher + Default,
    N: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>, 
[src]

impl<'a, T, N, S> IntoIterator for &'a IndexSet<T, N, S> where
    T: Eq + Hash,
    S: BuildHasher,
    N: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>, 
[src]

type Item = &'a T

The type of the elements being iterated over.

type IntoIter = Iter<'a, T>

Which kind of iterator are we turning this into?

impl<T, N, S> Extend<T> for IndexSet<T, N, S> where
    T: Eq + Hash,
    S: BuildHasher,
    N: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>, 
[src]

impl<'a, T, N, S> Extend<&'a T> for IndexSet<T, N, S> where
    T: 'a + Eq + Hash + Copy,
    S: BuildHasher,
    N: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>, 
[src]

impl<T, N, S> Clone for IndexSet<T, N, S> where
    T: Eq + Hash + Clone,
    S: Clone,
    N: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>, 
[src]

fn clone_from(&mut self, source: &Self)
1.0.0
[src]

Performs copy-assignment from source. Read more

impl<T, N, S> Default for IndexSet<T, N, S> where
    T: Eq + Hash,
    S: BuildHasher + Default,
    N: ArrayLength<Bucket<T, ()>> + ArrayLength<Option<Pos>>, 
[src]

Auto Trait Implementations

impl<T, N, S> Send for IndexSet<T, N, S> where
    S: Send,
    T: Send

impl<T, N, S> Sync for IndexSet<T, N, S> where
    S: Sync,
    T: Sync

Blanket Implementations

impl<T> From for T[src]

impl<T, U> TryFrom for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto for T where
    U: TryFrom<T>, 
[src]

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

The type returned in the event of a conversion error.

impl<T, U> Into for T where
    U: From<T>, 
[src]

impl<T> Borrow for T where
    T: ?Sized
[src]

impl<T> BorrowMut for T where
    T: ?Sized
[src]

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<T> Same for T[src]

type Output = T

Should always be Self