Struct PtrID 

pub struct PtrID<E, P> { /* private fields */ }

Pointer-backed ID referencing a Unit<E> inside an EntityAlloc.

PtrID is a thin, non-null wrapper around a raw NonNull<Unit<E>>. It is intended for fast, pointer-based access to entities. The struct carries a PhantomData<P> to associate the allocation policy at the type level.

Safety / 注意事项：

• PtrID assumes the pointer points to a properly initialized Unit<E>.
• Many operations are unsafe without validity checks; prefer the safe conversion methods in IEntityAllocID/EntityAlloc that validate generation/index when necessary.

Implementations

impl<E, P: IAllocPolicy> PtrID<E, P>

pub fn check_validity(&self, alloc: &EntityAlloc<E, P>) -> bool

Check whether this pointer currently refers to a valid allocated unit.

Returns true if the pointer can be resolved to a live GenIndex in the provided alloc. This performs the same generation/index check used by other conversion helpers.

检查此指针在给定的 EntityAlloc 中是否仍然有效（未被释放或越界）。

pub unsafe fn direct_deref<'a>(self) -> Option<&'a E>

Directly dereference the underlying unit, without validity check.

Safety

The caller must ensure the pointer is valid and the unit is initialized. 不做有效性检查，调用者必须保证指针有效且单元已初始化。

pub unsafe fn direct_deref_mut<'a>(self) -> Option<&'a mut E>

Directly dereference the underlying unit mutably, without validity check.

Safety

The caller must ensure exclusive access and that the pointer is valid. 不做有效性检查，调用者必须保证对该内存拥有唯一可变访问权。

Trait Implementations

impl<E, P> Clone for PtrID<E, P>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<E, P> Debug for PtrID<E, P>

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

Formats the value using the given formatter.

impl<E, P> From<NonNull<Unit<E>>> for PtrID<E, P>

fn from(ptr: NonNull<Unit<E>>) -> Self

Converts to this type from the input type.

impl<E, P> Hash for PtrID<E, P>

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<E, P: IAllocPolicy> IEntityAllocID<E, P> for PtrID<E, P>

fn from_ptr(_: &EntityAlloc<E, P>, ptr: PtrID<E, P>) -> Option<Self>

Create an ID from a pointer-backed ID, validating generation/index.

fn from_index( alloc: &EntityAlloc<E, P>, indexed: IndexedID<E, P>, ) -> Option<Self>

Create an ID from an index-backed ID, validating generation/index.

fn try_deref(self, alloc: &EntityAlloc<E, P>) -> Option<&E>

Try to dereference the entity this ID points to, returning None if invalid.

fn try_deref_mut(self, alloc: &mut EntityAlloc<E, P>) -> Option<&mut E>

Try to mutably dereference the entity this ID points to, returning None if invalid.

fn to_index(self, alloc: &EntityAlloc<E, P>) -> Option<IndexedID<E, P>>

Convert this ID to an index-backed ID, validating generation/index.

fn to_ptr(self, _alloc: &EntityAlloc<E, P>) -> Option<PtrID<E, P>>

Convert this ID to a pointer-backed ID, validating generation/index.

fn allocate_from(alloc: &EntityAlloc<E, P>, val: E) -> Self

Allocate a new entity in the given allocator and return its ID. NOTE that MTB::Entity library is ID-driven; allocation and deallocation must be done through IDs.

fn free(self, alloc: &mut EntityAlloc<E, P>) -> Option<E>

Free the referenced entity and return its owned value if successful.

fn deref(self, alloc: &EntityAlloc<E, P>) -> &E

Directly dereference the entity this ID points to, panicking if invalid.

fn deref_mut(self, alloc: &mut EntityAlloc<E, P>) -> &mut E

Directly mutably dereference the entity this ID points to, panicking if invalid.

impl<E, P: IAllocPolicy> IPoliciedID for PtrID<E, P>

type ObjectT = E

The object type this ID references.

type PolicyT = P

The allocation policy this ID is associated with.

type BackID = PtrID<E, P>

The backend ID type that implements the actual logic.

fn from_backend(ptr: Self::BackID) -> Self

Create this ID from its backend representation.

fn into_backend(self) -> Self::BackID

Convert this ID into its backend representation.

fn try_deref_alloc(self, alloc: &IDBoundAlloc<Self>) -> Option<&Self::ObjectT>

Try to dereference the object this ID points to, returning None if invalid.

fn try_deref_alloc_mut( self, alloc: &mut IDBoundAlloc<Self>, ) -> Option<&mut Self::ObjectT>

Try to mutably dereference the object this ID points to, returning None if invalid.

fn deref_alloc(self, alloc: &IDBoundAlloc<Self>) -> &Self::ObjectT

Dereference the object this ID points to, panicking if invalid.

fn deref_alloc_mut(self, alloc: &mut IDBoundAlloc<Self>) -> &mut Self::ObjectT

Mutably dereference the object this ID points to, panicking if invalid.

impl<E, P> Ord for PtrID<E, P>

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<E, P> PartialEq for PtrID<E, P>

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<E, P> PartialOrd for PtrID<E, P>

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<E, P> Pointer for PtrID<E, P>

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

Formats the value using the given formatter.

impl<E, P> Copy for PtrID<E, P>

impl<E, P> Eq for PtrID<E, P>

impl<E: Send, P> Send for PtrID<E, P>

impl<E: Sync, P> Sync for PtrID<E, P>