pub struct Mapping<TId, TValue> { /* private fields */ }
Expand description
A Mapping<TValue>
holds a collection of TValue
s that can be addressed by TId
s. You can
think of it as a HashMap<TId, TValue>, optimized for the case in which we know the TId
s are
contiguous.
Implementations§
source§impl<TId: ArenaId, TValue> Mapping<TId, TValue>
impl<TId: ArenaId, TValue> Mapping<TId, TValue>
sourcepub fn with_capacity(n: usize) -> Self
pub fn with_capacity(n: usize) -> Self
Constructs a new arena with a capacity for n
values pre-allocated.
sourcepub const fn chunk_and_offset(id: usize) -> (usize, usize)
pub const fn chunk_and_offset(id: usize) -> (usize, usize)
Get chunk and offset for specific id
sourcepub fn insert(&mut self, id: TId, value: TValue)
pub fn insert(&mut self, id: TId, value: TValue)
Insert into the mapping with the specific value
sourcepub fn get(&self, id: TId) -> Option<&TValue>
pub fn get(&self, id: TId) -> Option<&TValue>
Get a specific value in the mapping with bound checks
sourcepub fn get_mut(&mut self, id: TId) -> Option<&mut TValue>
pub fn get_mut(&mut self, id: TId) -> Option<&mut TValue>
Get a mutable specific value in the mapping with bound checks
sourcepub unsafe fn get_unchecked(&self, id: TId) -> &TValue
pub unsafe fn get_unchecked(&self, id: TId) -> &TValue
Get a specific value in the mapping without bound checks
Safety
The caller must uphold most of the safety requirements for get_unchecked
. i.e. the id having been inserted into the Mapping before.
sourcepub unsafe fn get_unchecked_mut(&mut self, id: TId) -> &mut TValue
pub unsafe fn get_unchecked_mut(&mut self, id: TId) -> &mut TValue
Get a specific value in the mapping without bound checks
Safety
The caller must uphold most of the safety requirements for get_unchecked_mut
. i.e. the id having been inserted into the Mapping before.
Trait Implementations§
Auto Trait Implementations§
impl<TId, TValue> RefUnwindSafe for Mapping<TId, TValue>where
TId: RefUnwindSafe,
TValue: RefUnwindSafe,
impl<TId, TValue> Send for Mapping<TId, TValue>
impl<TId, TValue> Sync for Mapping<TId, TValue>
impl<TId, TValue> Unpin for Mapping<TId, TValue>
impl<TId, TValue> UnwindSafe for Mapping<TId, TValue>where
TId: UnwindSafe,
TValue: UnwindSafe,
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