Struct wasmtime_environ::entity::PrimaryMap

pub struct PrimaryMap<K, V> where
    K: EntityRef,  { /* fields omitted */ }

A primary mapping K -> V allocating dense entity references.

The PrimaryMap data structure uses the dense index space to implement a map with a vector.

A primary map contains the main definition of an entity, and it can be used to allocate new entity references with the push method.

There should only be a single PrimaryMap instance for a given EntityRef type, otherwise conflicting references will be created. Using unknown keys for indexing will cause a panic.

Note that PrimaryMap doesn’t implement Deref or DerefMut, which would allow &PrimaryMap<K, V> to convert to &[V]. One of the main advantages of PrimaryMap is that it only allows indexing with the distinct EntityRef key type, so converting to a plain slice would make it easier to use incorrectly. To make a slice of a PrimaryMap, use into_boxed_slice.

Implementations

impl<K, V> PrimaryMap<K, V> where
    K: EntityRef, 

pub fn new() -> PrimaryMap<K, V>

Create a new empty map.

pub fn with_capacity(capacity: usize) -> PrimaryMap<K, V>

Create a new empty map with the given capacity.

pub fn is_valid(&self, k: K) -> bool

Check if k is a valid key in the map.

pub fn get(&self, k: K) -> Option<&V>

Get the element at k if it exists.

pub fn get_mut(&mut self, k: K) -> Option<&mut V>

Get the element at k if it exists, mutable version.

pub fn is_empty(&self) -> bool

Is this map completely empty?

pub fn len(&self) -> usize

Get the total number of entity references created.

pub fn keys(&self) -> Keys<K>

Iterate over all the keys in this map.

pub fn values(&self) -> Iter<'_, V>

Iterate over all the values in this map.

pub fn values_mut(&mut self) -> IterMut<'_, V>

Iterate over all the values in this map, mutable edition.

pub fn iter(&self) -> Iter<'_, K, V>

Iterate over all the keys and values in this map.

pub fn iter_mut(&mut self) -> IterMut<'_, K, V>

Iterate over all the keys and values in this map, mutable edition.

pub fn clear(&mut self)

Remove all entries from this map.

pub fn next_key(&self) -> K

Get the key that will be assigned to the next pushed value.

pub fn push(&mut self, v: V) -> K

Append v to the mapping, assigning a new key which is returned.

pub fn last(&self) -> Option<&V>

Returns the last element that was inserted in the map.

pub fn reserve(&mut self, additional: usize)

Reserves capacity for at least additional more elements to be inserted.

pub fn reserve_exact(&mut self, additional: usize)

Reserves the minimum capacity for exactly additional more elements to be inserted.

pub fn shrink_to_fit(&mut self)

Shrinks the capacity of the PrimaryMap as much as possible.

pub fn into_boxed_slice(self) -> BoxedSlice<K, V>

Consumes this PrimaryMap and produces a BoxedSlice.

Trait Implementations

impl<K, V> Clone for PrimaryMap<K, V> where
    K: Clone + EntityRef,
    V: Clone, 

pub fn clone(&self) -> PrimaryMap<K, V>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<K, V> Debug for PrimaryMap<K, V> where
    K: Debug + EntityRef,
    V: Debug, 

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

Formats the value using the given formatter.

impl<K, V> Default for PrimaryMap<K, V> where
    K: EntityRef, 

pub fn default() -> PrimaryMap<K, V>

Returns the “default value” for a type.

impl<'de, K, V> Deserialize<'de> for PrimaryMap<K, V> where
    K: EntityRef,
    V: Deserialize<'de>, 

pub fn deserialize<__D>(
    __deserializer: __D
) -> Result<PrimaryMap<K, V>, <__D as Deserializer<'de>>::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl<K, V> Eq for PrimaryMap<K, V> where
    K: Eq + EntityRef,
    V: Eq, 

impl<K, V> FromIterator<V> for PrimaryMap<K, V> where
    K: EntityRef, 

pub fn from_iter<T>(iter: T) -> PrimaryMap<K, V> where
    T: IntoIterator<Item = V>, 

Creates a value from an iterator.

impl<K, V> Hash for PrimaryMap<K, V> where
    K: Hash + EntityRef,
    V: Hash, 

pub fn hash<__H>(&self, state: &mut __H) where
    __H: Hasher, 

Feeds this value into the given Hasher.

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

Feeds a slice of this type into the given Hasher.

impl<K, V> Index<K> for PrimaryMap<K, V> where
    K: EntityRef, 

Immutable indexing into an PrimaryMap. The indexed value must be in the map.

type Output = V

The returned type after indexing.

pub fn index(&self, k: K) -> &V

Performs the indexing (container[index]) operation.

impl<K, V> IndexMut<K> for PrimaryMap<K, V> where
    K: EntityRef, 

Mutable indexing into an PrimaryMap.

pub fn index_mut(&mut self, k: K) -> &mut V

Performs the mutable indexing (container[index]) operation.

impl<'a, K, V> IntoIterator for &'a mut PrimaryMap<K, V> where
    K: EntityRef, 

type Item = (K, &'a mut V)

The type of the elements being iterated over.

type IntoIter = IterMut<'a, K, V>

Which kind of iterator are we turning this into?

pub fn into_iter(self) -> <&'a mut PrimaryMap<K, V> as IntoIterator>::IntoIter

Creates an iterator from a value.

impl<'a, K, V> IntoIterator for &'a PrimaryMap<K, V> where
    K: EntityRef, 

type Item = (K, &'a V)

The type of the elements being iterated over.

type IntoIter = Iter<'a, K, V>

Which kind of iterator are we turning this into?

pub fn into_iter(self) -> <&'a PrimaryMap<K, V> as IntoIterator>::IntoIter

Creates an iterator from a value.

impl<K, V> IntoIterator for PrimaryMap<K, V> where
    K: EntityRef, 

type Item = (K, V)

The type of the elements being iterated over.

type IntoIter = IntoIter<K, V>

Which kind of iterator are we turning this into?

pub fn into_iter(self) -> <PrimaryMap<K, V> as IntoIterator>::IntoIter

Creates an iterator from a value.

impl<K, V> PartialEq<PrimaryMap<K, V>> for PrimaryMap<K, V> where
    K: PartialEq<K> + EntityRef,
    V: PartialEq<V>, 

pub fn eq(&self, other: &PrimaryMap<K, V>) -> bool

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

pub fn ne(&self, other: &PrimaryMap<K, V>) -> bool

This method tests for !=.

impl<K, V> Serialize for PrimaryMap<K, V> where
    K: EntityRef,
    V: Serialize, 

pub fn serialize<__S>(
    &self,
    __serializer: __S
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error> where
    __S: Serializer, 

Serialize this value into the given Serde serializer.

impl<K, V> StructuralEq for PrimaryMap<K, V> where
    K: EntityRef, 

impl<K, V> StructuralPartialEq for PrimaryMap<K, V> where
    K: EntityRef,