Struct cranelift_entity::PrimaryMap
source · pub struct PrimaryMap<K, V>where
K: EntityRef,{ /* private fields */ }
Expand description
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.
Implementations§
source§impl<K, V> PrimaryMap<K, V>where
K: EntityRef,
impl<K, V> PrimaryMap<K, V>where
K: EntityRef,
sourcepub fn get_mut(&mut self, k: K) -> Option<&mut V>
pub fn get_mut(&mut self, k: K) -> Option<&mut V>
Get the element at k
if it exists, mutable version.
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.
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.
Trait Implementations§
source§impl<K: Clone, V: Clone> Clone for PrimaryMap<K, V>where
K: EntityRef,
impl<K: Clone, V: Clone> Clone for PrimaryMap<K, V>where
K: EntityRef,
source§fn clone(&self) -> PrimaryMap<K, V>
fn clone(&self) -> PrimaryMap<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> Index<K> for PrimaryMap<K, V>where
K: EntityRef,
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.
source§impl<K, V> IndexMut<K> for PrimaryMap<K, V>where
K: EntityRef,
impl<K, V> IndexMut<K> for PrimaryMap<K, V>where
K: EntityRef,
Mutable indexing into an PrimaryMap
.