Struct musli_zerocopy::swiss::Map

pub struct Map<'a, K, V> { /* private fields */ }

A map bound to a Buf through Buf::bind for convenience.

Examples

use musli_zerocopy::OwnedBuf;
use musli_zerocopy::swiss;

let mut buf = OwnedBuf::new();

let map = swiss::store_map(&mut buf, [(1, 2), (2, 3)])?;
let map = buf.bind(map)?;

assert_eq!(map.get(&1)?, Some(&2));
assert_eq!(map.get(&2)?, Some(&3));
assert_eq!(map.get(&3)?, None);

assert!(map.contains_key(&1)?);
assert!(!map.contains_key(&3)?);

Implementations

impl<'a, K, V> Map<'a, K, V>

where K: ZeroCopy, V: ZeroCopy,

pub fn get<Q>(&self, key: &Q) -> Result<Option<&V>, Error>

where Q: ?Sized + Visit, Q::Target: Eq + Hash, K: Visit, K::Target: Borrow<Q::Target>,

Get a value from the map.

Examples

use musli_zerocopy::OwnedBuf;
use musli_zerocopy::swiss;

let mut buf = OwnedBuf::new();

let map = swiss::store_map(&mut buf, [(1, 2), (2, 3)])?;
let map = buf.bind(map)?;

assert_eq!(map.get(&1)?, Some(&2));
assert_eq!(map.get(&2)?, Some(&3));
assert_eq!(map.get(&3)?, None);

pub fn len(&self) -> usize

Get the length of the map.

Examples

use musli_zerocopy::OwnedBuf;
use musli_zerocopy::swiss;

let mut buf = OwnedBuf::new();

let map = swiss::store_map(&mut buf, [(1, 2), (2, 3)])?;
let map = buf.bind(map)?;

assert_eq!(map.len(), 2);

pub fn is_empty(&self) -> bool

Test if the map is empty.

Examples

use musli_zerocopy::OwnedBuf;
use musli_zerocopy::swiss;

let mut buf = OwnedBuf::new();

let map = swiss::store_map(&mut buf, [(1, 2), (2, 3)])?;
let map = buf.bind(map)?;

assert!(!map.is_empty());

pub fn contains_key<Q>(&self, key: &Q) -> Result<bool, Error>

where Q: ?Sized + Visit, Q::Target: Eq + Hash, K: Visit, K::Target: Borrow<Q::Target>,

Test if the map contains the given key.

Examples

use musli_zerocopy::OwnedBuf;
use musli_zerocopy::swiss;

let mut buf = OwnedBuf::new();

let map = swiss::store_map(&mut buf, [(1, 2), (2, 3)])?;
let map = buf.bind(map)?;

assert!(map.contains_key(&1)?);
assert!(map.contains_key(&2)?);
assert!(!map.contains_key(&3)?);