Struct cranelift_entity::SecondaryMap
source · pub struct SecondaryMap<K, V>where
K: EntityRef,
V: Clone,{ /* private fields */ }
Expand description
A mapping K -> V
for densely indexed entity references.
The SecondaryMap
data structure uses the dense index space to implement a map with a vector.
Unlike PrimaryMap
, an SecondaryMap
can’t be used to allocate entity references. It is used
to associate secondary information with entities.
The map does not track if an entry for a key has been inserted or not. Instead it behaves as if all keys have a default entry from the beginning.
Implementations§
source§impl<K, V> SecondaryMap<K, V>where
K: EntityRef,
V: Clone,
impl<K, V> SecondaryMap<K, V>where K: EntityRef, V: Clone,
Shared SecondaryMap
implementation for all value types.
sourcepub fn with_capacity(capacity: usize) -> Selfwhere
V: Default,
pub fn with_capacity(capacity: usize) -> Selfwhere V: Default,
Create a new, empty map with the specified capacity.
The map will be able to hold exactly capacity
elements without reallocating.
sourcepub fn with_default(default: V) -> Self
pub fn with_default(default: V) -> Self
Create a new empty map with a specified default value.
This constructor does not require V to implement Default.
sourcepub fn capacity(&self) -> usize
pub fn capacity(&self) -> usize
Returns the number of elements the map can hold without reallocating.
sourcepub fn iter_mut(&mut self) -> IterMut<'_, K, V> ⓘ
pub fn iter_mut(&mut self) -> IterMut<'_, K, V> ⓘ
Iterate over all the keys and values in this map, mutable edition.
sourcepub fn values_mut(&mut self) -> IterMut<'_, V>
pub fn values_mut(&mut self) -> IterMut<'_, V>
Iterate over all the values in this map, mutable edition.
Trait Implementations§
source§impl<K, V> Clone for SecondaryMap<K, V>where
K: EntityRef + Clone,
V: Clone + Clone,
impl<K, V> Clone for SecondaryMap<K, V>where K: EntityRef + Clone, V: Clone + Clone,
source§fn clone(&self) -> SecondaryMap<K, V>
fn clone(&self) -> SecondaryMap<K, V>
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl<K, V> Default for SecondaryMap<K, V>where
K: EntityRef,
V: Clone + Default,
impl<K, V> Default for SecondaryMap<K, V>where K: EntityRef, V: Clone + Default,
source§fn default() -> SecondaryMap<K, V>
fn default() -> SecondaryMap<K, V>
source§impl<'de, K, V> Deserialize<'de> for SecondaryMap<K, V>where
K: EntityRef,
V: Clone + Deserialize<'de>,
impl<'de, K, V> Deserialize<'de> for SecondaryMap<K, V>where K: EntityRef, V: Clone + Deserialize<'de>,
source§fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>where
D: Deserializer<'de>,
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>where D: Deserializer<'de>,
source§impl<K, V> Index<K> for SecondaryMap<K, V>where
K: EntityRef,
V: Clone,
impl<K, V> Index<K> for SecondaryMap<K, V>where K: EntityRef, V: Clone,
Immutable indexing into an SecondaryMap
.
All keys are permitted. Untouched entries have the default value.
source§impl<K, V> IndexMut<K> for SecondaryMap<K, V>where
K: EntityRef,
V: Clone,
impl<K, V> IndexMut<K> for SecondaryMap<K, V>where K: EntityRef, V: Clone,
Mutable indexing into an SecondaryMap
.
The map grows as needed to accommodate new keys.